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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, USA. |
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21 |
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22 */ |
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23 |
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24 // Parser for Octave. |
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25 |
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767
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26 // C decarations. |
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27 |
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1
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28 %{ |
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29 #define YYDEBUG 1 |
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30 |
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240
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31 #ifdef HAVE_CONFIG_H |
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32 #include <config.h> |
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240
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33 #endif |
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34 |
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3178
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35 #include <cassert> |
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3156
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36 #include <cstdio> |
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37 |
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2427
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38 #ifdef YYBYACC |
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39 #include <cstdlib> |
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40 #endif |
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41 |
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3928
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42 #include "Cell.h" |
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43 #include "Matrix.h" |
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3021
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44 #include "cmd-edit.h" |
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45 #include "cmd-hist.h" |
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46 #include "file-ops.h" |
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47 #include "file-stat.h" |
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4171
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48 #include "lo-sstream.h" |
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4243
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49 #include "oct-env.h" |
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3712
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50 #include "oct-time.h" |
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4171
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51 #include "quit.h" |
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52 |
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3665
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53 #include "comment-list.h" |
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4243
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54 #include "defaults.h" |
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2166
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55 #include "defun.h" |
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4243
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56 #include "dirfns.h" |
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3021
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57 #include "dynamic-ld.h" |
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58 #include "error.h" |
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59 #include "input.h" |
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60 #include "lex.h" |
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1743
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61 #include "oct-hist.h" |
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62 #include "ov-fcn-handle.h" |
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63 #include "ov-usr-fcn.h" |
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64 #include "toplev.h" |
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65 #include "pager.h" |
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66 #include "parse.h" |
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67 #include "pt-all.h" |
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68 #include "symtab.h" |
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69 #include "token.h" |
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70 #include "unwind-prot.h" |
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1
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71 #include "utils.h" |
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1351
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72 #include "variables.h" |
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73 |
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2166
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74 // If TRUE, generate a warning for the assignment in things like |
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75 // |
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76 // octave> if (a = 2 < n) |
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77 // |
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78 // but not |
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79 // |
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80 // octave> if ((a = 2) < n) |
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81 // |
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82 static bool Vwarn_assign_as_truth_value; |
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83 |
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5161
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84 // If TRUE, generate warning about the meaning of code changing due to |
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85 // changes in associativity for various ops (typically for Matlab |
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86 // compatibility). |
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87 static bool Vwarn_associativity_change; |
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88 |
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2166
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89 // If TRUE, generate warning if declared function name disagrees with |
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90 // the name of the file in which it is defined. |
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91 static bool Vwarn_function_name_clash; |
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92 |
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93 // TRUE means warn about function files that have time stamps in the future. |
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94 bool Vwarn_future_time_stamp; |
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95 |
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96 // If TRUE, generate warning if a statement in a function is not |
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97 // terminated with a semicolon. Useful for checking functions that |
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98 // should only produce output using explicit printing statements. |
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99 static bool Vwarn_missing_semicolon; |
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100 |
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101 // If TRUE, generate warning about the meaning of code changing due to |
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102 // changes in precedence levels for various ops (typically for Matlab |
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103 // compatibility). |
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104 static bool Vwarn_precedence_change; |
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105 |
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106 // If TRUE, generate a warning for variable switch labels. |
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107 static bool Vwarn_variable_switch_label; |
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108 |
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109 // Temporary symbol table pointer used to cope with bogus function syntax. |
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110 symbol_table *tmp_local_sym_tab = 0; |
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111 |
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112 // The current input line number. |
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113 int input_line_number = 0; |
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114 |
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115 // The column of the current token. |
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143
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116 int current_input_column = 1; |
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117 |
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338
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118 // Buffer for help text snagged from function files. |
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119 std::stack<std::string> help_buf; |
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120 |
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121 // Buffer for comments appearing before a function statement. |
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122 static std::string fcn_comment_header; |
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123 |
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124 // TRUE means we are using readline. |
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125 // (--no-line-editing) |
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126 bool line_editing = true; |
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127 |
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128 // TRUE means we printed messages about reading startup files. |
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129 bool reading_startup_message_printed = false; |
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130 |
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131 // TRUE means input is coming from startup file. |
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132 bool input_from_startup_file = false; |
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133 |
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3489
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134 // TRUE means that we are in the process of evaluating a function |
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135 // body. The parser might be called in that case if we are looking at |
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136 // an eval() statement. |
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137 bool evaluating_function_body = false; |
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138 |
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4238
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139 // Keep a count of how many END tokens we expect. |
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140 int end_tokens_expected = 0; |
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141 |
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3903
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142 // Keep track of symbol table information when parsing functions. |
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143 std::stack<symbol_table*> symtab_context; |
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144 |
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145 // Name of parent function when parsing function files that might |
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146 // contain nested functions. |
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147 std::string parent_function_name; |
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148 |
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496
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149 // Forward declarations for some functions defined at the bottom of |
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150 // the file. |
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151 |
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152 // Generic error messages. |
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153 static void |
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154 yyerror (const char *s); |
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155 |
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578
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156 // Error mesages for mismatched end tokens. |
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157 static void |
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158 end_error (const char *type, token::end_tok_type ettype, int l, int c); |
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159 |
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578
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160 // Check to see that end tokens are properly matched. |
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161 static bool |
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162 end_token_ok (token *tok, token::end_tok_type expected); |
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163 |
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164 // Maybe print a warning if an assignment expression is used as the |
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165 // test in a logical expression. |
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166 static void |
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167 maybe_warn_assign_as_truth_value (tree_expression *expr); |
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168 |
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2764
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169 // Maybe print a warning about switch labels that aren't constants. |
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170 static void |
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171 maybe_warn_variable_switch_label (tree_expression *expr); |
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172 |
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173 // Finish building a range. |
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174 static tree_expression * |
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175 finish_colon_expression (tree_colon_expression *e); |
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176 |
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1607
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177 // Build a constant. |
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178 static tree_constant * |
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179 make_constant (int op, token *tok_val); |
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180 |
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4342
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181 // Build a function handle. |
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182 static tree_fcn_handle * |
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183 make_fcn_handle (token *tok_val); |
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184 |
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4935
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185 // Build an anonymous function handle. |
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186 static tree_constant * |
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187 make_anon_fcn_handle (tree_parameter_list *param_list, tree_statement *stmt); |
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188 |
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578
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189 // Build a binary expression. |
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190 static tree_expression * |
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191 make_binary_op (int op, tree_expression *op1, token *tok_val, |
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192 tree_expression *op2); |
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193 |
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194 // Build a boolean expression. |
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195 static tree_expression * |
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196 make_boolean_op (int op, tree_expression *op1, token *tok_val, |
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197 tree_expression *op2); |
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198 |
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578
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199 // Build a prefix expression. |
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200 static tree_expression * |
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201 make_prefix_op (int op, tree_expression *op1, token *tok_val); |
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202 |
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203 // Build a postfix expression. |
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204 static tree_expression * |
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205 make_postfix_op (int op, tree_expression *op1, token *tok_val); |
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206 |
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207 // Build an unwind-protect command. |
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208 static tree_command * |
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209 make_unwind_command (token *unwind_tok, tree_statement_list *body, |
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210 tree_statement_list *cleanup, token *end_tok, |
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211 octave_comment_list *lc, octave_comment_list *mc); |
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212 |
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213 // Build a try-catch command. |
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214 static tree_command * |
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215 make_try_command (token *try_tok, tree_statement_list *body, |
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216 tree_statement_list *cleanup, token *end_tok, |
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217 octave_comment_list *lc, octave_comment_list *mc); |
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218 |
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219 // Build a while command. |
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220 static tree_command * |
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221 make_while_command (token *while_tok, tree_expression *expr, |
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222 tree_statement_list *body, token *end_tok, |
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223 octave_comment_list *lc); |
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224 |
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225 // Build a do-until command. |
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226 static tree_command * |
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227 make_do_until_command (token *do_tok, tree_statement_list *body, |
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228 tree_expression *expr, octave_comment_list *lc); |
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229 |
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230 // Build a for command. |
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231 static tree_command * |
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232 make_for_command (token *for_tok, tree_argument_list *lhs, |
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233 tree_expression *expr, tree_statement_list *body, |
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234 token *end_tok, octave_comment_list *lc); |
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235 |
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236 // Build a break command. |
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237 static tree_command * |
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238 make_break_command (token *break_tok); |
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239 |
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240 // Build a continue command. |
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241 static tree_command * |
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242 make_continue_command (token *continue_tok); |
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243 |
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244 // Build a return command. |
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245 static tree_command * |
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246 make_return_command (token *return_tok); |
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247 |
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248 // Start an if command. |
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249 static tree_if_command_list * |
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250 start_if_command (tree_expression *expr, tree_statement_list *list); |
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251 |
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252 // Finish an if command. |
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253 static tree_if_command * |
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254 finish_if_command (token *if_tok, tree_if_command_list *list, |
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255 token *end_tok, octave_comment_list *lc); |
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256 |
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257 // Build an elseif clause. |
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258 static tree_if_clause * |
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259 make_elseif_clause (tree_expression *expr, tree_statement_list *list, |
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260 octave_comment_list *lc); |
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261 |
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262 // Finish a switch command. |
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263 static tree_switch_command * |
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264 finish_switch_command (token *switch_tok, tree_expression *expr, |
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265 tree_switch_case_list *list, token *end_tok, |
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266 octave_comment_list *lc); |
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267 |
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268 // Build a switch case. |
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269 static tree_switch_case * |
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270 make_switch_case (tree_expression *expr, tree_statement_list *list, |
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271 octave_comment_list *lc); |
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272 |
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1623
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273 // Build an assignment to a variable. |
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274 static tree_expression * |
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275 make_assign_op (int op, tree_argument_list *lhs, token *eq_tok, |
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276 tree_expression *rhs); |
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277 |
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278 // Begin defining a function. |
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279 static octave_user_function * |
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280 start_function (tree_parameter_list *param_list, tree_statement_list *body); |
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281 |
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282 // Do most of the work for defining a function. |
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283 static octave_user_function * |
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284 frob_function (const std::string& fname, octave_user_function *fcn); |
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285 |
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286 // Finish defining a function. |
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287 static octave_user_function * |
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288 finish_function (tree_identifier *id, octave_user_function *fcn, |
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289 octave_comment_list *lc); |
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290 |
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291 // Finish defining a function a different way. |
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292 static octave_user_function * |
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293 finish_function (tree_parameter_list *ret_list, |
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294 octave_user_function *fcn, octave_comment_list *lc); |
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295 |
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296 // Reset state after parsing function. |
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297 static void |
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298 recover_from_parsing_function (void); |
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299 |
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751
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300 // Make an index expression. |
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301 static tree_index_expression * |
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302 make_index_expression (tree_expression *expr, |
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303 tree_argument_list *args, char type); |
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304 |
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305 // Make an indirect reference expression. |
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306 static tree_index_expression * |
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3523
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307 make_indirect_ref (tree_expression *expr, const std::string&); |
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666
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308 |
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4131
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309 // Make an indirect reference expression with dynamic field name. |
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310 static tree_index_expression * |
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311 make_indirect_ref (tree_expression *expr, tree_expression *field); |
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312 |
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2846
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313 // Make a declaration command. |
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314 static tree_decl_command * |
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315 make_decl_command (int tok, token *tok_val, tree_decl_init_list *lst); |
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316 |
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1623
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317 // Finish building a matrix list. |
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318 static tree_expression * |
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319 finish_matrix (tree_matrix *m); |
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320 |
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321 // Finish building a cell list. |
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322 static tree_expression * |
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323 finish_cell (tree_cell *c); |
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324 |
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325 // Maybe print a warning. Duh. |
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326 static void |
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327 maybe_warn_missing_semi (tree_statement_list *); |
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328 |
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329 // Set the print flag for a statement based on the separator type. |
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330 static void |
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331 set_stmt_print_flag (tree_statement_list *, char, bool); |
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332 |
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1
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333 #define ABORT_PARSE \ |
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334 do \ |
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335 { \ |
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522
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336 global_command = 0; \ |
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1
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337 yyerrok; \ |
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4238
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338 if (! symtab_context.empty ()) \ |
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3929
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339 { \ |
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340 curr_sym_tab = symtab_context.top (); \ |
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341 symtab_context.pop (); \ |
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342 } \ |
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343 if (interactive || forced_interactive) \ |
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344 YYACCEPT; \ |
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345 else \ |
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346 YYABORT; \ |
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347 } \ |
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348 while (0) |
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349 |
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350 %} |
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351 |
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666
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352 // Bison declarations. |
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353 |
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4813
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354 // Don't add spaces around the = here; it causes some versions of |
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355 // bison to fail to properly recognize the directive. |
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356 |
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357 %name-prefix="octave_" |
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4753
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358 |
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1
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359 %union |
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360 { |
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2891
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361 // The type of the basic tokens returned by the lexer. |
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143
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362 token *tok_val; |
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363 |
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3665
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364 // Comment strings that we need to deal with mid-rule. |
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365 octave_comment_list *comment_type; |
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366 |
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2891
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367 // Types for the nonterminals we generate. |
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368 char sep_type; |
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1
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369 tree *tree_type; |
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370 tree_matrix *tree_matrix_type; |
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3351
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371 tree_cell *tree_cell_type; |
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496
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372 tree_expression *tree_expression_type; |
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373 tree_constant *tree_constant_type; |
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4342
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374 tree_fcn_handle *tree_fcn_handle_type; |
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1
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375 tree_identifier *tree_identifier_type; |
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376 tree_index_expression *tree_index_expression_type; |
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377 tree_colon_expression *tree_colon_expression_type; |
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378 tree_argument_list *tree_argument_list_type; |
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379 tree_parameter_list *tree_parameter_list_type; |
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380 tree_command *tree_command_type; |
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381 tree_if_command *tree_if_command_type; |
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578
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382 tree_if_clause *tree_if_clause_type; |
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383 tree_if_command_list *tree_if_command_list_type; |
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384 tree_switch_command *tree_switch_command_type; |
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385 tree_switch_case *tree_switch_case_type; |
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386 tree_switch_case_list *tree_switch_case_list_type; |
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2846
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387 tree_decl_elt *tree_decl_elt_type; |
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388 tree_decl_init_list *tree_decl_init_list_type; |
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389 tree_decl_command *tree_decl_command_type; |
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578
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390 tree_statement *tree_statement_type; |
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391 tree_statement_list *tree_statement_list_type; |
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2891
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392 octave_user_function *octave_user_function_type; |
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1
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393 } |
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394 |
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143
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395 // Tokens with line and column information. |
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396 %token <tok_val> '=' ':' '-' '+' '*' '/' |
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4018
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397 %token <tok_val> ADD_EQ SUB_EQ MUL_EQ DIV_EQ LEFTDIV_EQ POW_EQ |
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398 %token <tok_val> EMUL_EQ EDIV_EQ ELEFTDIV_EQ EPOW_EQ AND_EQ OR_EQ |
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2899
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399 %token <tok_val> LSHIFT_EQ RSHIFT_EQ LSHIFT RSHIFT |
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428
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400 %token <tok_val> EXPR_AND_AND EXPR_OR_OR |
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143
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401 %token <tok_val> EXPR_AND EXPR_OR EXPR_NOT |
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402 %token <tok_val> EXPR_LT EXPR_LE EXPR_EQ EXPR_NE EXPR_GE EXPR_GT |
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1276
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403 %token <tok_val> LEFTDIV EMUL EDIV ELEFTDIV EPLUS EMINUS |
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404 %token <tok_val> QUOTE TRANSPOSE |
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143
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405 %token <tok_val> PLUS_PLUS MINUS_MINUS POW EPOW |
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406 %token <tok_val> NUM IMAG_NUM |
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2970
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407 %token <tok_val> STRUCT_ELT |
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2883
|
408 %token <tok_val> NAME |
|
143
|
409 %token <tok_val> END |
|
5279
|
410 %token <tok_val> DQ_STRING SQ_STRING |
|
3484
|
411 %token <tok_val> FOR WHILE DO UNTIL |
|
1491
|
412 %token <tok_val> IF ELSEIF ELSE |
|
2764
|
413 %token <tok_val> SWITCH CASE OTHERWISE |
|
1491
|
414 %token <tok_val> BREAK CONTINUE FUNC_RET |
|
924
|
415 %token <tok_val> UNWIND CLEANUP |
|
1489
|
416 %token <tok_val> TRY CATCH |
|
2846
|
417 %token <tok_val> GLOBAL STATIC |
|
4342
|
418 %token <tok_val> FCN_HANDLE |
|
1
|
419 |
|
143
|
420 // Other tokens. |
|
2970
|
421 %token END_OF_INPUT LEXICAL_ERROR |
|
3973
|
422 %token FCN VARARGIN VARARGOUT ALL_VA_ARGS |
|
5296
|
423 %token CLOSE_BRACE |
|
1
|
424 |
|
143
|
425 // Nonterminals we construct. |
|
3665
|
426 %type <comment_type> stash_comment function_beg |
|
2525
|
427 %type <sep_type> sep_no_nl opt_sep_no_nl sep opt_sep |
|
578
|
428 %type <tree_type> input |
|
5279
|
429 %type <tree_constant_type> string constant magic_colon anon_fcn_handle |
|
4342
|
430 %type <tree_fcn_handle_type> fcn_handle |
|
3351
|
431 %type <tree_matrix_type> matrix_rows matrix_rows1 |
|
|
432 %type <tree_cell_type> cell_rows cell_rows1 |
|
5102
|
433 %type <tree_expression_type> matrix cell |
|
4207
|
434 %type <tree_expression_type> primary_expr postfix_expr prefix_expr binary_expr |
|
|
435 %type <tree_expression_type> simple_expr colon_expr assign_expr expression |
|
4238
|
436 %type <tree_identifier_type> identifier fcn_name |
|
2891
|
437 %type <octave_user_function_type> function1 function2 function3 |
|
2970
|
438 %type <tree_index_expression_type> word_list_cmd |
|
|
439 %type <tree_colon_expression_type> colon_expr1 |
|
3351
|
440 %type <tree_argument_list_type> arg_list word_list assign_lhs |
|
|
441 %type <tree_argument_list_type> cell_or_matrix_row |
|
4935
|
442 %type <tree_parameter_list_type> param_list param_list1 param_list2 |
|
723
|
443 %type <tree_parameter_list_type> return_list return_list1 |
|
2970
|
444 %type <tree_command_type> command select_command loop_command |
|
4207
|
445 %type <tree_command_type> jump_command except_command function |
|
578
|
446 %type <tree_if_command_type> if_command |
|
|
447 %type <tree_if_clause_type> elseif_clause else_clause |
|
|
448 %type <tree_if_command_list_type> if_cmd_list1 if_cmd_list |
|
2764
|
449 %type <tree_switch_command_type> switch_command |
|
|
450 %type <tree_switch_case_type> switch_case default_case |
|
|
451 %type <tree_switch_case_list_type> case_list1 case_list |
|
2846
|
452 %type <tree_decl_elt_type> decl2 |
|
|
453 %type <tree_decl_init_list_type> decl1 |
|
|
454 %type <tree_decl_command_type> declaration |
|
578
|
455 %type <tree_statement_type> statement |
|
627
|
456 %type <tree_statement_list_type> simple_list simple_list1 list list1 |
|
2891
|
457 %type <tree_statement_list_type> opt_list input1 function4 |
|
1
|
458 |
|
143
|
459 // Precedence and associativity. |
|
1
|
460 %left ';' ',' '\n' |
|
4018
|
461 %right '=' ADD_EQ SUB_EQ MUL_EQ DIV_EQ LEFTDIV_EQ POW_EQ EMUL_EQ EDIV_EQ ELEFTDIV_EQ EPOW_EQ OR_EQ AND_EQ LSHIFT_EQ RSHIFT_EQ |
|
4023
|
462 %left EXPR_OR_OR |
|
|
463 %left EXPR_AND_AND |
|
|
464 %left EXPR_OR |
|
|
465 %left EXPR_AND |
|
1
|
466 %left EXPR_LT EXPR_LE EXPR_EQ EXPR_NE EXPR_GE EXPR_GT |
|
2899
|
467 %left LSHIFT RSHIFT |
|
1
|
468 %left ':' |
|
1276
|
469 %left '-' '+' EPLUS EMINUS |
|
1
|
470 %left '*' '/' LEFTDIV EMUL EDIV ELEFTDIV |
|
|
471 %left QUOTE TRANSPOSE |
|
|
472 %left UNARY PLUS_PLUS MINUS_MINUS EXPR_NOT |
|
5160
|
473 %left POW EPOW |
|
3351
|
474 %left '(' '.' '{' |
|
1
|
475 |
|
143
|
476 // Where to start. |
|
1
|
477 %start input |
|
|
478 |
|
|
479 %% |
|
|
480 |
|
2970
|
481 // ============================== |
|
|
482 // Statements and statement lists |
|
|
483 // ============================== |
|
|
484 |
|
627
|
485 input : input1 |
|
1
|
486 { |
|
627
|
487 global_command = $1; |
|
1
|
488 promptflag = 1; |
|
|
489 YYACCEPT; |
|
|
490 } |
|
627
|
491 | simple_list parse_error |
|
1091
|
492 { ABORT_PARSE; } |
|
627
|
493 | parse_error |
|
1091
|
494 { ABORT_PARSE; } |
|
627
|
495 ; |
|
|
496 |
|
|
497 input1 : '\n' |
|
|
498 { $$ = 0; } |
|
3883
|
499 | END_OF_INPUT |
|
|
500 { |
|
|
501 parser_end_of_input = 1; |
|
|
502 $$ = 0; |
|
|
503 } |
|
327
|
504 | simple_list |
|
627
|
505 { $$ = $1; } |
|
1
|
506 | simple_list '\n' |
|
627
|
507 { $$ = $1; } |
|
1
|
508 | simple_list END_OF_INPUT |
|
627
|
509 { $$ = $1; } |
|
|
510 ; |
|
|
511 |
|
2525
|
512 simple_list : simple_list1 opt_sep_no_nl |
|
1
|
513 { |
|
2525
|
514 set_stmt_print_flag ($1, $2, false); |
|
1511
|
515 $$ = $1; |
|
1
|
516 } |
|
|
517 ; |
|
|
518 |
|
578
|
519 simple_list1 : statement |
|
|
520 { $$ = new tree_statement_list ($1); } |
|
2525
|
521 | simple_list1 sep_no_nl statement |
|
1
|
522 { |
|
2525
|
523 set_stmt_print_flag ($1, $2, false); |
|
578
|
524 $1->append ($3); |
|
1511
|
525 $$ = $1; |
|
1
|
526 } |
|
|
527 ; |
|
|
528 |
|
|
529 opt_list : // empty |
|
578
|
530 { $$ = new tree_statement_list (); } |
|
1
|
531 | list |
|
|
532 { $$ = $1; } |
|
496
|
533 ; |
|
1
|
534 |
|
2525
|
535 list : list1 opt_sep |
|
1511
|
536 { |
|
2525
|
537 set_stmt_print_flag ($1, $2, true); |
|
1829
|
538 $$ = $1; |
|
1
|
539 } |
|
|
540 ; |
|
|
541 |
|
578
|
542 list1 : statement |
|
440
|
543 { |
|
2857
|
544 lexer_flags.beginning_of_function = false; |
|
578
|
545 $$ = new tree_statement_list ($1); |
|
440
|
546 } |
|
2525
|
547 | list1 sep statement |
|
1511
|
548 { |
|
2525
|
549 set_stmt_print_flag ($1, $2, true); |
|
578
|
550 $1->append ($3); |
|
1511
|
551 $$ = $1; |
|
1
|
552 } |
|
|
553 ; |
|
|
554 |
|
2970
|
555 statement : expression |
|
3665
|
556 { |
|
|
557 octave_comment_list *comment |
|
|
558 = octave_comment_buffer::get_comment (); |
|
|
559 |
|
|
560 $$ = new tree_statement ($1, comment); |
|
|
561 } |
|
2970
|
562 | command |
|
3665
|
563 { |
|
|
564 octave_comment_list *comment |
|
|
565 = octave_comment_buffer::get_comment (); |
|
|
566 |
|
|
567 $$ = new tree_statement ($1, comment); |
|
|
568 } |
|
1
|
569 ; |
|
|
570 |
|
2970
|
571 // =========== |
|
|
572 // Expressions |
|
|
573 // =========== |
|
|
574 |
|
|
575 identifier : NAME |
|
|
576 { |
|
|
577 $$ = new tree_identifier |
|
|
578 ($1->sym_rec (), $1->line (), $1->column ()); |
|
|
579 } |
|
|
580 ; |
|
|
581 |
|
5279
|
582 string : DQ_STRING |
|
|
583 { $$ = make_constant (DQ_STRING, $1); } |
|
|
584 | SQ_STRING |
|
|
585 { $$ = make_constant (SQ_STRING, $1); } |
|
|
586 ; |
|
|
587 |
|
2970
|
588 constant : NUM |
|
|
589 { $$ = make_constant (NUM, $1); } |
|
|
590 | IMAG_NUM |
|
|
591 { $$ = make_constant (IMAG_NUM, $1); } |
|
5279
|
592 | string |
|
|
593 { $$ = $1; } |
|
2970
|
594 ; |
|
|
595 |
|
3189
|
596 in_matrix_or_assign_lhs |
|
|
597 : // empty |
|
|
598 { lexer_flags.looking_at_matrix_or_assign_lhs = true; } |
|
|
599 ; |
|
|
600 |
|
2970
|
601 matrix : '[' ']' |
|
|
602 { $$ = new tree_constant (octave_value (Matrix ())); } |
|
|
603 | '[' ';' ']' |
|
|
604 { $$ = new tree_constant (octave_value (Matrix ())); } |
|
3351
|
605 | '[' in_matrix_or_assign_lhs matrix_rows ']' |
|
3203
|
606 { |
|
|
607 $$ = finish_matrix ($3); |
|
|
608 lexer_flags.looking_at_matrix_or_assign_lhs = false; |
|
|
609 } |
|
2970
|
610 ; |
|
|
611 |
|
3351
|
612 matrix_rows : matrix_rows1 |
|
2970
|
613 { $$ = $1; } |
|
3351
|
614 | matrix_rows1 ';' // Ignore trailing semicolon. |
|
2970
|
615 { $$ = $1; } |
|
|
616 ; |
|
|
617 |
|
3351
|
618 matrix_rows1 : cell_or_matrix_row |
|
2970
|
619 { $$ = new tree_matrix ($1); } |
|
3351
|
620 | matrix_rows1 ';' cell_or_matrix_row |
|
2970
|
621 { |
|
|
622 $1->append ($3); |
|
|
623 $$ = $1; |
|
|
624 } |
|
|
625 ; |
|
|
626 |
|
3351
|
627 cell : '{' '}' |
|
3928
|
628 { $$ = new tree_constant (octave_value (Cell ())); } |
|
3351
|
629 | '{' ';' '}' |
|
3928
|
630 { $$ = new tree_constant (octave_value (Cell ())); } |
|
3351
|
631 | '{' cell_rows '}' |
|
|
632 { $$ = finish_cell ($2); } |
|
|
633 ; |
|
|
634 |
|
|
635 cell_rows : cell_rows1 |
|
|
636 { $$ = $1; } |
|
|
637 | cell_rows1 ';' // Ignore trailing semicolon. |
|
|
638 { $$ = $1; } |
|
|
639 ; |
|
|
640 |
|
|
641 cell_rows1 : cell_or_matrix_row |
|
|
642 { $$ = new tree_cell ($1); } |
|
|
643 | cell_rows1 ';' cell_or_matrix_row |
|
|
644 { |
|
|
645 $1->append ($3); |
|
|
646 $$ = $1; |
|
|
647 } |
|
|
648 ; |
|
|
649 |
|
|
650 cell_or_matrix_row |
|
|
651 : arg_list |
|
2970
|
652 { $$ = $1; } |
|
|
653 | arg_list ',' // Ignore trailing comma. |
|
|
654 { $$ = $1; } |
|
|
655 ; |
|
|
656 |
|
4930
|
657 fcn_handle : '@' FCN_HANDLE |
|
|
658 { |
|
|
659 $$ = make_fcn_handle ($2); |
|
|
660 lexer_flags.looking_at_function_handle--; |
|
|
661 } |
|
|
662 ; |
|
|
663 |
|
4935
|
664 anon_fcn_handle : '@' param_list statement |
|
|
665 { $$ = make_anon_fcn_handle ($2, $3); } |
|
4342
|
666 ; |
|
|
667 |
|
2970
|
668 primary_expr : identifier |
|
|
669 { $$ = $1; } |
|
|
670 | constant |
|
|
671 { $$ = $1; } |
|
4342
|
672 | fcn_handle |
|
|
673 { $$ = $1; } |
|
2970
|
674 | matrix |
|
|
675 { $$ = $1; } |
|
3351
|
676 | cell |
|
|
677 { $$ = $1; } |
|
2970
|
678 | '(' expression ')' |
|
|
679 { $$ = $2->mark_in_parens (); } |
|
|
680 ; |
|
|
681 |
|
|
682 magic_colon : ':' |
|
|
683 { |
|
|
684 octave_value tmp (octave_value::magic_colon_t); |
|
|
685 $$ = new tree_constant (tmp); |
|
|
686 } |
|
|
687 ; |
|
|
688 |
|
|
689 arg_list : expression |
|
|
690 { $$ = new tree_argument_list ($1); } |
|
|
691 | magic_colon |
|
|
692 { $$ = new tree_argument_list ($1); } |
|
|
693 | ALL_VA_ARGS |
|
|
694 { |
|
|
695 octave_value tmp (octave_value::all_va_args_t); |
|
|
696 tree_constant *all_va_args = new tree_constant (tmp); |
|
|
697 $$ = new tree_argument_list (all_va_args); |
|
|
698 } |
|
|
699 | arg_list ',' magic_colon |
|
|
700 { |
|
|
701 $1->append ($3); |
|
|
702 $$ = $1; |
|
|
703 } |
|
|
704 | arg_list ',' expression |
|
|
705 { |
|
|
706 $1->append ($3); |
|
|
707 $$ = $1; |
|
|
708 } |
|
|
709 | arg_list ',' ALL_VA_ARGS |
|
|
710 { |
|
|
711 octave_value tmp (octave_value::all_va_args_t); |
|
|
712 tree_constant *all_va_args = new tree_constant (tmp); |
|
|
713 $1->append (all_va_args); |
|
|
714 $$ = $1; |
|
|
715 } |
|
|
716 ; |
|
|
717 |
|
4131
|
718 indirect_ref_op : '.' |
|
2970
|
719 { lexer_flags.looking_at_indirect_ref = true; } |
|
|
720 ; |
|
|
721 |
|
4615
|
722 // Two more rules for lexical feedback. To avoid reduce/reduce |
|
|
723 // conflicts, We use begin_obj_idx after every postfix_expr on the RHS |
|
|
724 // of a rule, then cancel that as soon as possible for cases when we |
|
|
725 // are not actually parsing an index expression. Since all of those |
|
|
726 // cases are simple tokens that don't involve examining the value of |
|
|
727 // lexer_flags.looking_at_object_index, I think we should be OK. |
|
|
728 |
|
4234
|
729 begin_obj_idx : // empty |
|
4237
|
730 { lexer_flags.looking_at_object_index++; } |
|
4234
|
731 ; |
|
|
732 |
|
4615
|
733 cancel_obj_idx : // empty |
|
|
734 { lexer_flags.looking_at_object_index--; } |
|
|
735 ; |
|
|
736 |
|
2970
|
737 postfix_expr : primary_expr |
|
|
738 { $$ = $1; } |
|
4613
|
739 | postfix_expr begin_obj_idx '(' ')' |
|
4236
|
740 { |
|
|
741 $$ = make_index_expression ($1, 0, '('); |
|
4237
|
742 lexer_flags.looking_at_object_index--; |
|
4236
|
743 } |
|
4613
|
744 | postfix_expr begin_obj_idx '(' arg_list ')' |
|
4234
|
745 { |
|
|
746 $$ = make_index_expression ($1, $4, '('); |
|
4237
|
747 lexer_flags.looking_at_object_index--; |
|
4234
|
748 } |
|
4613
|
749 | postfix_expr begin_obj_idx '{' '}' |
|
4236
|
750 { |
|
|
751 $$ = make_index_expression ($1, 0, '{'); |
|
4237
|
752 lexer_flags.looking_at_object_index--; |
|
4236
|
753 } |
|
4613
|
754 | postfix_expr begin_obj_idx '{' arg_list '}' |
|
4234
|
755 { |
|
|
756 $$ = make_index_expression ($1, $4, '{'); |
|
4237
|
757 lexer_flags.looking_at_object_index--; |
|
4234
|
758 } |
|
4615
|
759 | postfix_expr begin_obj_idx PLUS_PLUS cancel_obj_idx |
|
|
760 { $$ = make_postfix_op (PLUS_PLUS, $1, $3); } |
|
|
761 | postfix_expr begin_obj_idx MINUS_MINUS cancel_obj_idx |
|
|
762 { $$ = make_postfix_op (MINUS_MINUS, $1, $3); } |
|
|
763 | postfix_expr begin_obj_idx QUOTE cancel_obj_idx |
|
|
764 { $$ = make_postfix_op (QUOTE, $1, $3); } |
|
|
765 | postfix_expr begin_obj_idx TRANSPOSE cancel_obj_idx |
|
|
766 { $$ = make_postfix_op (TRANSPOSE, $1, $3); } |
|
|
767 | postfix_expr begin_obj_idx indirect_ref_op cancel_obj_idx STRUCT_ELT |
|
|
768 { $$ = make_indirect_ref ($1, $5->text ()); } |
|
|
769 | postfix_expr begin_obj_idx indirect_ref_op cancel_obj_idx '(' expression ')' |
|
|
770 { $$ = make_indirect_ref ($1, $6); } |
|
2970
|
771 ; |
|
|
772 |
|
4615
|
773 prefix_expr : postfix_expr begin_obj_idx cancel_obj_idx |
|
2970
|
774 { $$ = $1; } |
|
3178
|
775 | binary_expr |
|
|
776 { $$ = $1; } |
|
2970
|
777 | PLUS_PLUS prefix_expr %prec UNARY |
|
|
778 { $$ = make_prefix_op (PLUS_PLUS, $2, $1); } |
|
|
779 | MINUS_MINUS prefix_expr %prec UNARY |
|
|
780 { $$ = make_prefix_op (MINUS_MINUS, $2, $1); } |
|
|
781 | EXPR_NOT prefix_expr %prec UNARY |
|
|
782 { $$ = make_prefix_op (EXPR_NOT, $2, $1); } |
|
|
783 | '+' prefix_expr %prec UNARY |
|
4965
|
784 { $$ = make_prefix_op ('+', $2, $1); } |
|
2970
|
785 | '-' prefix_expr %prec UNARY |
|
|
786 { $$ = make_prefix_op ('-', $2, $1); } |
|
|
787 ; |
|
|
788 |
|
3178
|
789 binary_expr : prefix_expr POW prefix_expr |
|
2970
|
790 { $$ = make_binary_op (POW, $1, $2, $3); } |
|
3178
|
791 | prefix_expr EPOW prefix_expr |
|
2970
|
792 { $$ = make_binary_op (EPOW, $1, $2, $3); } |
|
3178
|
793 | prefix_expr '+' prefix_expr |
|
2970
|
794 { $$ = make_binary_op ('+', $1, $2, $3); } |
|
3178
|
795 | prefix_expr '-' prefix_expr |
|
2970
|
796 { $$ = make_binary_op ('-', $1, $2, $3); } |
|
3178
|
797 | prefix_expr '*' prefix_expr |
|
2970
|
798 { $$ = make_binary_op ('*', $1, $2, $3); } |
|
3178
|
799 | prefix_expr '/' prefix_expr |
|
2970
|
800 { $$ = make_binary_op ('/', $1, $2, $3); } |
|
3178
|
801 | prefix_expr EPLUS prefix_expr |
|
2970
|
802 { $$ = make_binary_op ('+', $1, $2, $3); } |
|
3178
|
803 | prefix_expr EMINUS prefix_expr |
|
2970
|
804 { $$ = make_binary_op ('-', $1, $2, $3); } |
|
3178
|
805 | prefix_expr EMUL prefix_expr |
|
2970
|
806 { $$ = make_binary_op (EMUL, $1, $2, $3); } |
|
3178
|
807 | prefix_expr EDIV prefix_expr |
|
2970
|
808 { $$ = make_binary_op (EDIV, $1, $2, $3); } |
|
3178
|
809 | prefix_expr LEFTDIV prefix_expr |
|
2970
|
810 { $$ = make_binary_op (LEFTDIV, $1, $2, $3); } |
|
3178
|
811 | prefix_expr ELEFTDIV prefix_expr |
|
2970
|
812 { $$ = make_binary_op (ELEFTDIV, $1, $2, $3); } |
|
|
813 ; |
|
|
814 |
|
|
815 colon_expr : colon_expr1 |
|
|
816 { $$ = finish_colon_expression ($1); } |
|
|
817 ; |
|
|
818 |
|
3178
|
819 colon_expr1 : prefix_expr |
|
2970
|
820 { $$ = new tree_colon_expression ($1); } |
|
3178
|
821 | colon_expr1 ':' prefix_expr |
|
2970
|
822 { |
|
|
823 if (! ($$ = $1->append ($3))) |
|
|
824 ABORT_PARSE; |
|
|
825 } |
|
|
826 ; |
|
|
827 |
|
|
828 simple_expr : colon_expr |
|
|
829 { $$ = $1; } |
|
|
830 | simple_expr LSHIFT simple_expr |
|
|
831 { $$ = make_binary_op (LSHIFT, $1, $2, $3); } |
|
|
832 | simple_expr RSHIFT simple_expr |
|
|
833 { $$ = make_binary_op (RSHIFT, $1, $2, $3); } |
|
|
834 | simple_expr EXPR_LT simple_expr |
|
|
835 { $$ = make_binary_op (EXPR_LT, $1, $2, $3); } |
|
|
836 | simple_expr EXPR_LE simple_expr |
|
|
837 { $$ = make_binary_op (EXPR_LE, $1, $2, $3); } |
|
|
838 | simple_expr EXPR_EQ simple_expr |
|
|
839 { $$ = make_binary_op (EXPR_EQ, $1, $2, $3); } |
|
|
840 | simple_expr EXPR_GE simple_expr |
|
|
841 { $$ = make_binary_op (EXPR_GE, $1, $2, $3); } |
|
|
842 | simple_expr EXPR_GT simple_expr |
|
|
843 { $$ = make_binary_op (EXPR_GT, $1, $2, $3); } |
|
|
844 | simple_expr EXPR_NE simple_expr |
|
|
845 { $$ = make_binary_op (EXPR_NE, $1, $2, $3); } |
|
|
846 | simple_expr EXPR_AND simple_expr |
|
|
847 { $$ = make_binary_op (EXPR_AND, $1, $2, $3); } |
|
|
848 | simple_expr EXPR_OR simple_expr |
|
|
849 { $$ = make_binary_op (EXPR_OR, $1, $2, $3); } |
|
|
850 | simple_expr EXPR_AND_AND simple_expr |
|
|
851 { $$ = make_boolean_op (EXPR_AND_AND, $1, $2, $3); } |
|
|
852 | simple_expr EXPR_OR_OR simple_expr |
|
|
853 { $$ = make_boolean_op (EXPR_OR_OR, $1, $2, $3); } |
|
|
854 ; |
|
|
855 |
|
|
856 // Arrange for the lexer to return CLOSE_BRACE for `]' by looking ahead |
|
|
857 // one token for an assignment op. |
|
|
858 |
|
|
859 assign_lhs : simple_expr |
|
|
860 { $$ = new tree_argument_list ($1); } |
|
3189
|
861 | '[' in_matrix_or_assign_lhs arg_list CLOSE_BRACE |
|
|
862 { |
|
|
863 $$ = $3; |
|
|
864 lexer_flags.looking_at_matrix_or_assign_lhs = false; |
|
|
865 } |
|
2970
|
866 ; |
|
|
867 |
|
|
868 assign_expr : assign_lhs '=' expression |
|
|
869 { $$ = make_assign_op ('=', $1, $2, $3); } |
|
|
870 | assign_lhs ADD_EQ expression |
|
|
871 { $$ = make_assign_op (ADD_EQ, $1, $2, $3); } |
|
|
872 | assign_lhs SUB_EQ expression |
|
|
873 { $$ = make_assign_op (SUB_EQ, $1, $2, $3); } |
|
|
874 | assign_lhs MUL_EQ expression |
|
|
875 { $$ = make_assign_op (MUL_EQ, $1, $2, $3); } |
|
|
876 | assign_lhs DIV_EQ expression |
|
|
877 { $$ = make_assign_op (DIV_EQ, $1, $2, $3); } |
|
3204
|
878 | assign_lhs LEFTDIV_EQ expression |
|
|
879 { $$ = make_assign_op (LEFTDIV_EQ, $1, $2, $3); } |
|
4018
|
880 | assign_lhs POW_EQ expression |
|
|
881 { $$ = make_assign_op (POW_EQ, $1, $2, $3); } |
|
2970
|
882 | assign_lhs LSHIFT_EQ expression |
|
|
883 { $$ = make_assign_op (LSHIFT_EQ, $1, $2, $3); } |
|
|
884 | assign_lhs RSHIFT_EQ expression |
|
|
885 { $$ = make_assign_op (RSHIFT_EQ, $1, $2, $3); } |
|
|
886 | assign_lhs EMUL_EQ expression |
|
|
887 { $$ = make_assign_op (EMUL_EQ, $1, $2, $3); } |
|
|
888 | assign_lhs EDIV_EQ expression |
|
|
889 { $$ = make_assign_op (EDIV_EQ, $1, $2, $3); } |
|
3204
|
890 | assign_lhs ELEFTDIV_EQ expression |
|
|
891 { $$ = make_assign_op (ELEFTDIV_EQ, $1, $2, $3); } |
|
4018
|
892 | assign_lhs EPOW_EQ expression |
|
|
893 { $$ = make_assign_op (EPOW_EQ, $1, $2, $3); } |
|
2970
|
894 | assign_lhs AND_EQ expression |
|
|
895 { $$ = make_assign_op (AND_EQ, $1, $2, $3); } |
|
|
896 | assign_lhs OR_EQ expression |
|
|
897 { $$ = make_assign_op (OR_EQ, $1, $2, $3); } |
|
|
898 ; |
|
|
899 |
|
|
900 word_list_cmd : identifier word_list |
|
3933
|
901 { $$ = make_index_expression ($1, $2, '('); } |
|
2970
|
902 ; |
|
|
903 |
|
5279
|
904 word_list : string |
|
|
905 { $$ = new tree_argument_list ($1); } |
|
|
906 | word_list string |
|
2970
|
907 { |
|
5279
|
908 $1->append ($2); |
|
2970
|
909 $$ = $1; |
|
|
910 } |
|
|
911 ; |
|
|
912 |
|
|
913 expression : simple_expr |
|
|
914 { $$ = $1; } |
|
|
915 | word_list_cmd |
|
|
916 { $$ = $1; } |
|
|
917 | assign_expr |
|
|
918 { $$ = $1; } |
|
4935
|
919 | anon_fcn_handle |
|
|
920 { $$ = $1; } |
|
2970
|
921 ; |
|
|
922 |
|
|
923 // ================================================ |
|
|
924 // Commands, declarations, and function definitions |
|
|
925 // ================================================ |
|
|
926 |
|
|
927 command : declaration |
|
|
928 { $$ = $1; } |
|
|
929 | select_command |
|
|
930 { $$ = $1; } |
|
|
931 | loop_command |
|
|
932 { $$ = $1; } |
|
4207
|
933 | jump_command |
|
|
934 { $$ = $1; } |
|
2970
|
935 | except_command |
|
|
936 { $$ = $1; } |
|
|
937 | function |
|
|
938 { $$ = $1; } |
|
|
939 ; |
|
|
940 |
|
|
941 // ===================== |
|
|
942 // Declaration statemnts |
|
|
943 // ===================== |
|
|
944 |
|
|
945 declaration : GLOBAL decl1 |
|
|
946 { $$ = make_decl_command (GLOBAL, $1, $2); } |
|
|
947 | STATIC decl1 |
|
|
948 { $$ = make_decl_command (STATIC, $1, $2); } |
|
|
949 ; |
|
|
950 |
|
|
951 decl1 : decl2 |
|
|
952 { $$ = new tree_decl_init_list ($1); } |
|
|
953 | decl1 decl2 |
|
|
954 { |
|
|
955 $1->append ($2); |
|
|
956 $$ = $1; |
|
|
957 } |
|
|
958 ; |
|
|
959 |
|
|
960 decl2 : identifier |
|
|
961 { $$ = new tree_decl_elt ($1); } |
|
|
962 | identifier '=' expression |
|
|
963 { $$ = new tree_decl_elt ($1, $3); } |
|
|
964 ; |
|
|
965 |
|
|
966 // ==================== |
|
|
967 // Selection statements |
|
|
968 // ==================== |
|
|
969 |
|
|
970 select_command : if_command |
|
|
971 { $$ = $1; } |
|
|
972 | switch_command |
|
|
973 { $$ = $1; } |
|
|
974 ; |
|
|
975 |
|
|
976 // ============ |
|
|
977 // If statement |
|
|
978 // ============ |
|
|
979 |
|
3665
|
980 if_command : IF stash_comment if_cmd_list END |
|
2970
|
981 { |
|
3665
|
982 if (! ($$ = finish_if_command ($1, $3, $4, $2))) |
|
2970
|
983 ABORT_PARSE; |
|
|
984 } |
|
|
985 ; |
|
|
986 |
|
|
987 if_cmd_list : if_cmd_list1 |
|
|
988 { $$ = $1; } |
|
|
989 | if_cmd_list1 else_clause |
|
|
990 { |
|
|
991 $1->append ($2); |
|
|
992 $$ = $1; |
|
|
993 } |
|
|
994 ; |
|
|
995 |
|
|
996 if_cmd_list1 : expression opt_sep opt_list |
|
|
997 { $$ = start_if_command ($1, $3); } |
|
|
998 | if_cmd_list1 elseif_clause |
|
|
999 { |
|
|
1000 $1->append ($2); |
|
|
1001 $$ = $1; |
|
|
1002 } |
|
|
1003 ; |
|
|
1004 |
|
3665
|
1005 elseif_clause : ELSEIF stash_comment opt_sep expression opt_sep opt_list |
|
|
1006 { $$ = make_elseif_clause ($4, $6, $2); } |
|
2970
|
1007 ; |
|
|
1008 |
|
3665
|
1009 else_clause : ELSE stash_comment opt_sep opt_list |
|
|
1010 { |
|
|
1011 $$ = new tree_if_clause ($4, $2); |
|
|
1012 } |
|
2970
|
1013 ; |
|
|
1014 |
|
|
1015 // ================ |
|
|
1016 // Switch statement |
|
|
1017 // ================ |
|
|
1018 |
|
3665
|
1019 switch_command : SWITCH stash_comment expression opt_sep case_list END |
|
2970
|
1020 { |
|
3665
|
1021 if (! ($$ = finish_switch_command ($1, $3, $5, $6, $2))) |
|
2970
|
1022 ABORT_PARSE; |
|
|
1023 } |
|
|
1024 ; |
|
|
1025 |
|
4044
|
1026 case_list : // empty |
|
|
1027 { $$ = new tree_switch_case_list (); } |
|
|
1028 | case_list1 |
|
2970
|
1029 { $$ = $1; } |
|
|
1030 | case_list1 default_case |
|
|
1031 { |
|
|
1032 $1->append ($2); |
|
|
1033 $$ = $1; |
|
|
1034 } |
|
|
1035 ; |
|
|
1036 |
|
|
1037 case_list1 : switch_case |
|
|
1038 { $$ = new tree_switch_case_list ($1); } |
|
|
1039 | case_list1 switch_case |
|
|
1040 { |
|
|
1041 $1->append ($2); |
|
|
1042 $$ = $1; |
|
|
1043 } |
|
|
1044 ; |
|
|
1045 |
|
4025
|
1046 switch_case : CASE stash_comment opt_sep expression opt_sep opt_list |
|
3665
|
1047 { $$ = make_switch_case ($4, $6, $2); } |
|
2970
|
1048 ; |
|
|
1049 |
|
3665
|
1050 default_case : OTHERWISE stash_comment opt_sep opt_list |
|
|
1051 { |
|
|
1052 $$ = new tree_switch_case ($4, $2); |
|
|
1053 } |
|
2970
|
1054 ; |
|
|
1055 |
|
|
1056 // ======= |
|
|
1057 // Looping |
|
|
1058 // ======= |
|
|
1059 |
|
3665
|
1060 loop_command : WHILE stash_comment expression opt_sep opt_list END |
|
2970
|
1061 { |
|
3665
|
1062 if (! ($$ = make_while_command ($1, $3, $5, $6, $2))) |
|
2970
|
1063 ABORT_PARSE; |
|
|
1064 } |
|
3665
|
1065 | DO stash_comment opt_sep opt_list UNTIL expression |
|
3484
|
1066 { |
|
3665
|
1067 if (! ($$ = make_do_until_command ($1, $4, $6, $2))) |
|
3484
|
1068 ABORT_PARSE; |
|
|
1069 } |
|
3665
|
1070 | FOR stash_comment assign_lhs '=' expression opt_sep opt_list END |
|
2970
|
1071 { |
|
3665
|
1072 if (! ($$ = make_for_command ($1, $3, $5, $7, $8, $2))) |
|
2970
|
1073 ABORT_PARSE; |
|
|
1074 } |
|
5127
|
1075 | FOR stash_comment '(' assign_lhs '=' expression ')' opt_sep opt_list END |
|
|
1076 { |
|
|
1077 if (! ($$ = make_for_command ($1, $4, $6, $9, $10, $2))) |
|
|
1078 ABORT_PARSE; |
|
|
1079 } |
|
2970
|
1080 ; |
|
|
1081 |
|
|
1082 // ======= |
|
|
1083 // Jumping |
|
|
1084 // ======= |
|
|
1085 |
|
4207
|
1086 jump_command : BREAK |
|
2970
|
1087 { |
|
4207
|
1088 if (! ($$ = make_break_command ($1))) |
|
2970
|
1089 ABORT_PARSE; |
|
|
1090 } |
|
|
1091 | CONTINUE |
|
|
1092 { |
|
4207
|
1093 if (! ($$ = make_continue_command ($1))) |
|
2970
|
1094 ABORT_PARSE; |
|
|
1095 } |
|
|
1096 | FUNC_RET |
|
|
1097 { |
|
4207
|
1098 if (! ($$ = make_return_command ($1))) |
|
2970
|
1099 ABORT_PARSE; |
|
|
1100 } |
|
|
1101 ; |
|
|
1102 |
|
|
1103 // ========== |
|
|
1104 // Exceptions |
|
|
1105 // ========== |
|
|
1106 |
|
3665
|
1107 except_command : UNWIND stash_comment opt_sep opt_list CLEANUP |
|
|
1108 stash_comment opt_sep opt_list END |
|
2970
|
1109 { |
|
3665
|
1110 if (! ($$ = make_unwind_command ($1, $4, $8, $9, $2, $6))) |
|
2970
|
1111 ABORT_PARSE; |
|
|
1112 } |
|
3665
|
1113 | TRY stash_comment opt_sep opt_list CATCH |
|
|
1114 stash_comment opt_sep opt_list END |
|
2970
|
1115 { |
|
3665
|
1116 if (! ($$ = make_try_command ($1, $4, $8, $9, $2, $6))) |
|
2970
|
1117 ABORT_PARSE; |
|
|
1118 } |
|
5344
|
1119 | TRY stash_comment opt_sep opt_list END |
|
|
1120 { |
|
|
1121 if (! ($$ = make_try_command ($1, $4, 0, $5, $2, 0))) |
|
|
1122 ABORT_PARSE; |
|
|
1123 } |
|
2970
|
1124 ; |
|
|
1125 |
|
|
1126 // =========================================== |
|
|
1127 // Some `subroutines' for function definitions |
|
|
1128 // =========================================== |
|
|
1129 |
|
3903
|
1130 save_symtab : // empty |
|
4238
|
1131 { symtab_context.push (curr_sym_tab); } |
|
3903
|
1132 ; |
|
|
1133 |
|
4009
|
1134 function_symtab : // empty |
|
|
1135 { curr_sym_tab = fbi_sym_tab; } |
|
2970
|
1136 ; |
|
|
1137 |
|
|
1138 local_symtab : // empty |
|
|
1139 { curr_sym_tab = tmp_local_sym_tab; } |
|
|
1140 ; |
|
|
1141 |
|
|
1142 in_return_list : // empty |
|
|
1143 { lexer_flags.looking_at_return_list = true; } |
|
|
1144 ; |
|
|
1145 |
|
|
1146 // =========================== |
|
|
1147 // List of function parameters |
|
|
1148 // =========================== |
|
|
1149 |
|
|
1150 param_list_beg : '(' |
|
4935
|
1151 { |
|
|
1152 lexer_flags.looking_at_parameter_list = true; |
|
|
1153 |
|
|
1154 if (lexer_flags.looking_at_function_handle) |
|
|
1155 { |
|
|
1156 symtab_context.push (curr_sym_tab); |
|
|
1157 |
|
|
1158 tmp_local_sym_tab = new symbol_table (); |
|
5013
|
1159 |
|
4935
|
1160 curr_sym_tab = tmp_local_sym_tab; |
|
|
1161 |
|
|
1162 lexer_flags.looking_at_function_handle--; |
|
|
1163 } |
|
|
1164 } |
|
2970
|
1165 ; |
|
|
1166 |
|
|
1167 param_list_end : ')' |
|
|
1168 { lexer_flags.looking_at_parameter_list = false; } |
|
|
1169 ; |
|
|
1170 |
|
4935
|
1171 param_list : param_list_beg param_list1 param_list_end |
|
2970
|
1172 { |
|
|
1173 lexer_flags.quote_is_transpose = false; |
|
4935
|
1174 $$ = $2; |
|
2970
|
1175 } |
|
|
1176 | param_list_beg error |
|
|
1177 { |
|
|
1178 yyerror ("invalid parameter list"); |
|
|
1179 $$ = 0; |
|
|
1180 ABORT_PARSE; |
|
|
1181 } |
|
4935
|
1182 ; |
|
|
1183 |
|
|
1184 param_list1 : // empty |
|
|
1185 { $$ = 0; } |
|
|
1186 | param_list2 |
|
|
1187 { |
|
|
1188 $1->mark_as_formal_parameters (); |
|
|
1189 $$ = $1; |
|
|
1190 } |
|
|
1191 | VARARGIN |
|
2970
|
1192 { |
|
4935
|
1193 tree_parameter_list *tmp = new tree_parameter_list (); |
|
|
1194 tmp->mark_varargs_only (); |
|
|
1195 $$ = tmp; |
|
|
1196 } |
|
|
1197 | param_list2 ',' VARARGIN |
|
|
1198 { |
|
|
1199 $1->mark_as_formal_parameters (); |
|
|
1200 $1->mark_varargs (); |
|
|
1201 $$ = $1; |
|
|
1202 } |
|
|
1203 ; |
|
|
1204 |
|
|
1205 param_list2 : identifier |
|
|
1206 { $$ = new tree_parameter_list ($1); } |
|
|
1207 | param_list2 ',' identifier |
|
|
1208 { |
|
|
1209 $1->append ($3); |
|
|
1210 $$ = $1; |
|
2970
|
1211 } |
|
|
1212 ; |
|
|
1213 |
|
|
1214 // =================================== |
|
|
1215 // List of function return value names |
|
|
1216 // =================================== |
|
|
1217 |
|
3189
|
1218 return_list_beg : '[' in_return_list local_symtab |
|
2970
|
1219 ; |
|
|
1220 |
|
|
1221 return_list : return_list_beg return_list_end |
|
|
1222 { |
|
|
1223 lexer_flags.looking_at_return_list = false; |
|
|
1224 $$ = new tree_parameter_list (); |
|
|
1225 } |
|
3973
|
1226 | return_list_beg VARARGOUT return_list_end |
|
2970
|
1227 { |
|
|
1228 lexer_flags.looking_at_return_list = false; |
|
|
1229 tree_parameter_list *tmp = new tree_parameter_list (); |
|
|
1230 tmp->mark_varargs_only (); |
|
|
1231 $$ = tmp; |
|
|
1232 } |
|
4678
|
1233 | VARARGOUT |
|
|
1234 { |
|
|
1235 lexer_flags.looking_at_return_list = false; |
|
|
1236 tree_parameter_list *tmp = new tree_parameter_list (); |
|
|
1237 tmp->mark_varargs_only (); |
|
|
1238 $$ = tmp; |
|
|
1239 } |
|
2970
|
1240 | return_list_beg return_list1 return_list_end |
|
|
1241 { |
|
|
1242 lexer_flags.looking_at_return_list = false; |
|
|
1243 $$ = $2; |
|
|
1244 } |
|
3973
|
1245 | return_list_beg return_list1 ',' VARARGOUT return_list_end |
|
2970
|
1246 { |
|
|
1247 lexer_flags.looking_at_return_list = false; |
|
|
1248 $2->mark_varargs (); |
|
|
1249 $$ = $2; |
|
|
1250 } |
|
|
1251 ; |
|
|
1252 |
|
|
1253 return_list1 : identifier |
|
|
1254 { $$ = new tree_parameter_list ($1); } |
|
|
1255 | return_list1 ',' identifier |
|
|
1256 { |
|
|
1257 $1->append ($3); |
|
|
1258 $$ = $1; |
|
|
1259 } |
|
|
1260 ; |
|
|
1261 |
|
4009
|
1262 return_list_end : function_symtab ']' |
|
2970
|
1263 ; |
|
|
1264 |
|
|
1265 // =================== |
|
|
1266 // Function definition |
|
|
1267 // =================== |
|
|
1268 |
|
4238
|
1269 function_beg : save_symtab FCN function_symtab stash_comment |
|
|
1270 { $$ = $4; } |
|
2970
|
1271 ; |
|
|
1272 |
|
|
1273 function : function_beg function2 |
|
|
1274 { |
|
3665
|
1275 $2->stash_leading_comment ($1); |
|
2970
|
1276 recover_from_parsing_function (); |
|
|
1277 $$ = 0; |
|
|
1278 } |
|
|
1279 | function_beg identifier function1 |
|
|
1280 { |
|
3665
|
1281 finish_function ($2, $3, $1); |
|
2970
|
1282 recover_from_parsing_function (); |
|
|
1283 $$ = 0; |
|
|
1284 } |
|
|
1285 | function_beg return_list function1 |
|
|
1286 { |
|
3665
|
1287 finish_function ($2, $3, $1); |
|
2970
|
1288 recover_from_parsing_function (); |
|
|
1289 $$ = 0; |
|
|
1290 } |
|
|
1291 ; |
|
|
1292 |
|
4009
|
1293 function1 : function_symtab '=' function2 |
|
2970
|
1294 { $$ = $3; } |
|
|
1295 ; |
|
|
1296 |
|
4238
|
1297 fcn_name : identifier local_symtab |
|
2970
|
1298 { |
|
4238
|
1299 std::string id_name = $1->name (); |
|
|
1300 |
|
|
1301 if (reading_fcn_file |
|
|
1302 && ! lexer_flags.parsing_nested_function) |
|
|
1303 parent_function_name = (curr_fcn_file_name == id_name) |
|
|
1304 ? id_name : curr_fcn_file_name; |
|
|
1305 |
|
|
1306 lexer_flags.parsed_function_name = true; |
|
|
1307 |
|
|
1308 $$ = $1; |
|
|
1309 } |
|
|
1310 ; |
|
|
1311 |
|
|
1312 function2 : fcn_name function3 |
|
|
1313 { |
|
4872
|
1314 std::string fname = $1->name (); |
|
|
1315 |
|
|
1316 delete $1; |
|
|
1317 |
|
|
1318 if (! ($$ = frob_function (fname, $2))) |
|
2970
|
1319 ABORT_PARSE; |
|
|
1320 } |
|
|
1321 ; |
|
|
1322 |
|
|
1323 function3 : param_list function4 |
|
|
1324 { $$ = start_function ($1, $2); } |
|
|
1325 | function4 |
|
|
1326 { $$ = start_function (0, $1); } |
|
|
1327 ; |
|
|
1328 |
|
|
1329 function4 : opt_sep opt_list function_end |
|
|
1330 { $$ = $2; } |
|
|
1331 ; |
|
|
1332 |
|
|
1333 function_end : END |
|
|
1334 { |
|
4238
|
1335 if (! end_token_ok ($1, token::function_end)) |
|
2970
|
1336 ABORT_PARSE; |
|
|
1337 } |
|
|
1338 | END_OF_INPUT |
|
|
1339 { |
|
4240
|
1340 if (lexer_flags.parsing_nested_function) |
|
|
1341 lexer_flags.parsing_nested_function = -1; |
|
4238
|
1342 |
|
3939
|
1343 if (! (reading_fcn_file || reading_script_file |
|
|
1344 || get_input_from_eval_string)) |
|
2970
|
1345 YYABORT; |
|
|
1346 } |
|
|
1347 ; |
|
|
1348 |
|
|
1349 // ============= |
|
|
1350 // Miscellaneous |
|
|
1351 // ============= |
|
|
1352 |
|
3665
|
1353 stash_comment : // empty |
|
|
1354 { $$ = octave_comment_buffer::get_comment (); } |
|
|
1355 ; |
|
|
1356 |
|
2970
|
1357 parse_error : LEXICAL_ERROR |
|
|
1358 { yyerror ("parse error"); } |
|
|
1359 | error |
|
1
|
1360 ; |
|
|
1361 |
|
2525
|
1362 sep_no_nl : ',' |
|
|
1363 { $$ = ','; } |
|
|
1364 | ';' |
|
|
1365 { $$ = ';'; } |
|
|
1366 | sep_no_nl ',' |
|
|
1367 { $$ = $1; } |
|
|
1368 | sep_no_nl ';' |
|
|
1369 { $$ = $1; } |
|
|
1370 ; |
|
|
1371 |
|
|
1372 opt_sep_no_nl : // empty |
|
|
1373 { $$ = 0; } |
|
|
1374 | sep_no_nl |
|
|
1375 { $$ = $1; } |
|
|
1376 ; |
|
|
1377 |
|
|
1378 sep : ',' |
|
|
1379 { $$ = ','; } |
|
|
1380 | ';' |
|
|
1381 { $$ = ';'; } |
|
|
1382 | '\n' |
|
|
1383 { $$ = '\n'; } |
|
|
1384 | sep ',' |
|
|
1385 { $$ = $1; } |
|
|
1386 | sep ';' |
|
|
1387 { $$ = $1; } |
|
|
1388 | sep '\n' |
|
|
1389 { $$ = $1; } |
|
|
1390 ; |
|
|
1391 |
|
|
1392 opt_sep : // empty |
|
|
1393 { $$ = 0; } |
|
|
1394 | sep |
|
|
1395 { $$ = $1; } |
|
|
1396 ; |
|
|
1397 |
|
1
|
1398 %% |
|
|
1399 |
|
666
|
1400 // Generic error messages. |
|
|
1401 |
|
1
|
1402 static void |
|
2805
|
1403 yyerror (const char *s) |
|
1
|
1404 { |
|
143
|
1405 int err_col = current_input_column - 1; |
|
1
|
1406 |
|
4051
|
1407 OSSTREAM output_buf; |
|
1
|
1408 |
|
1005
|
1409 if (reading_fcn_file || reading_script_file) |
|
|
1410 output_buf << "parse error near line " << input_line_number |
|
1607
|
1411 << " of file " << curr_fcn_file_full_name; |
|
1005
|
1412 else |
|
|
1413 output_buf << "parse error:"; |
|
581
|
1414 |
|
1005
|
1415 if (s && strcmp (s, "parse error") != 0) |
|
|
1416 output_buf << "\n\n " << s; |
|
|
1417 |
|
|
1418 output_buf << "\n\n"; |
|
1
|
1419 |
|
1755
|
1420 if (! current_input_line.empty ()) |
|
1
|
1421 { |
|
1755
|
1422 size_t len = current_input_line.length (); |
|
1060
|
1423 |
|
1755
|
1424 if (current_input_line[len-1] == '\n') |
|
|
1425 current_input_line.resize (len-1); |
|
1005
|
1426 |
|
4051
|
1427 // Print the line, maybe with a pointer near the error token. |
|
1005
|
1428 |
|
1755
|
1429 output_buf << ">>> " << current_input_line << "\n"; |
|
1060
|
1430 |
|
|
1431 if (err_col == 0) |
|
|
1432 err_col = len; |
|
|
1433 |
|
|
1434 for (int i = 0; i < err_col + 3; i++) |
|
|
1435 output_buf << " "; |
|
|
1436 |
|
|
1437 output_buf << "^"; |
|
1
|
1438 } |
|
1005
|
1439 |
|
4051
|
1440 output_buf << "\n" << OSSTREAM_ENDS; |
|
|
1441 |
|
|
1442 parse_error ("%s", OSSTREAM_C_STR (output_buf)); |
|
|
1443 |
|
|
1444 OSSTREAM_FREEZE (output_buf); |
|
1
|
1445 } |
|
|
1446 |
|
666
|
1447 // Error mesages for mismatched end tokens. |
|
|
1448 |
|
496
|
1449 static void |
|
2805
|
1450 end_error (const char *type, token::end_tok_type ettype, int l, int c) |
|
496
|
1451 { |
|
2805
|
1452 static const char *fmt |
|
|
1453 = "`%s' command matched by `%s' near line %d column %d"; |
|
496
|
1454 |
|
|
1455 switch (ettype) |
|
|
1456 { |
|
|
1457 case token::simple_end: |
|
|
1458 error (fmt, type, "end", l, c); |
|
|
1459 break; |
|
777
|
1460 |
|
496
|
1461 case token::for_end: |
|
|
1462 error (fmt, type, "endfor", l, c); |
|
|
1463 break; |
|
777
|
1464 |
|
496
|
1465 case token::function_end: |
|
|
1466 error (fmt, type, "endfunction", l, c); |
|
|
1467 break; |
|
777
|
1468 |
|
496
|
1469 case token::if_end: |
|
|
1470 error (fmt, type, "endif", l, c); |
|
|
1471 break; |
|
777
|
1472 |
|
3233
|
1473 case token::switch_end: |
|
|
1474 error (fmt, type, "endswitch", l, c); |
|
|
1475 break; |
|
|
1476 |
|
496
|
1477 case token::while_end: |
|
|
1478 error (fmt, type, "endwhile", l, c); |
|
|
1479 break; |
|
777
|
1480 |
|
5400
|
1481 case token::try_catch_end: |
|
|
1482 error (fmt, type, "end_try_catch", l, c); |
|
|
1483 break; |
|
|
1484 |
|
1371
|
1485 case token::unwind_protect_end: |
|
|
1486 error (fmt, type, "end_unwind_protect", l, c); |
|
|
1487 break; |
|
|
1488 |
|
496
|
1489 default: |
|
|
1490 panic_impossible (); |
|
|
1491 break; |
|
|
1492 } |
|
|
1493 } |
|
|
1494 |
|
666
|
1495 // Check to see that end tokens are properly matched. |
|
|
1496 |
|
2857
|
1497 static bool |
|
|
1498 end_token_ok (token *tok, token::end_tok_type expected) |
|
143
|
1499 { |
|
2857
|
1500 bool retval = true; |
|
|
1501 |
|
143
|
1502 token::end_tok_type ettype = tok->ettype (); |
|
2857
|
1503 |
|
143
|
1504 if (ettype != expected && ettype != token::simple_end) |
|
|
1505 { |
|
2857
|
1506 retval = false; |
|
|
1507 |
|
143
|
1508 yyerror ("parse error"); |
|
|
1509 |
|
|
1510 int l = tok->line (); |
|
|
1511 int c = tok->column (); |
|
|
1512 |
|
|
1513 switch (expected) |
|
|
1514 { |
|
|
1515 case token::for_end: |
|
|
1516 end_error ("for", ettype, l, c); |
|
|
1517 break; |
|
777
|
1518 |
|
143
|
1519 case token::function_end: |
|
|
1520 end_error ("function", ettype, l, c); |
|
|
1521 break; |
|
777
|
1522 |
|
143
|
1523 case token::if_end: |
|
|
1524 end_error ("if", ettype, l, c); |
|
|
1525 break; |
|
777
|
1526 |
|
1489
|
1527 case token::try_catch_end: |
|
|
1528 end_error ("try", ettype, l, c); |
|
|
1529 break; |
|
|
1530 |
|
2764
|
1531 case token::switch_end: |
|
|
1532 end_error ("switch", ettype, l, c); |
|
|
1533 break; |
|
|
1534 |
|
1489
|
1535 case token::unwind_protect_end: |
|
|
1536 end_error ("unwind_protect", ettype, l, c); |
|
|
1537 break; |
|
|
1538 |
|
143
|
1539 case token::while_end: |
|
|
1540 end_error ("while", ettype, l, c); |
|
|
1541 break; |
|
777
|
1542 |
|
143
|
1543 default: |
|
|
1544 panic_impossible (); |
|
|
1545 break; |
|
|
1546 } |
|
|
1547 } |
|
2857
|
1548 |
|
|
1549 return retval; |
|
143
|
1550 } |
|
|
1551 |
|
666
|
1552 // Maybe print a warning if an assignment expression is used as the |
|
|
1553 // test in a logical expression. |
|
|
1554 |
|
496
|
1555 static void |
|
|
1556 maybe_warn_assign_as_truth_value (tree_expression *expr) |
|
1
|
1557 { |
|
2166
|
1558 if (Vwarn_assign_as_truth_value |
|
1
|
1559 && expr->is_assignment_expression () |
|
2961
|
1560 && expr->paren_count () < 2) |
|
1
|
1561 { |
|
|
1562 warning ("suggest parenthesis around assignment used as truth value"); |
|
|
1563 } |
|
|
1564 } |
|
578
|
1565 |
|
2764
|
1566 // Maybe print a warning about switch labels that aren't constants. |
|
|
1567 |
|
|
1568 static void |
|
|
1569 maybe_warn_variable_switch_label (tree_expression *expr) |
|
|
1570 { |
|
|
1571 if (Vwarn_variable_switch_label && ! expr->is_constant ()) |
|
|
1572 { |
|
|
1573 warning ("variable switch label"); |
|
|
1574 } |
|
|
1575 } |
|
|
1576 |
|
2533
|
1577 static tree_expression * |
|
|
1578 fold (tree_binary_expression *e) |
|
|
1579 { |
|
3110
|
1580 tree_expression *retval = e; |
|
|
1581 |
|
3292
|
1582 unwind_protect::begin_frame ("fold_binary_expression"); |
|
3110
|
1583 |
|
|
1584 unwind_protect_int (error_state); |
|
4452
|
1585 unwind_protect_int (warning_state); |
|
3110
|
1586 |
|
3815
|
1587 unwind_protect_bool (discard_error_messages); |
|
4452
|
1588 unwind_protect_bool (discard_warning_messages); |
|
|
1589 |
|
3815
|
1590 discard_error_messages = true; |
|
4452
|
1591 discard_warning_messages = true; |
|
2533
|
1592 |
|
|
1593 tree_expression *op1 = e->lhs (); |
|
|
1594 tree_expression *op2 = e->rhs (); |
|
|
1595 |
|
5161
|
1596 octave_value::binary_op op_type = e->op_type (); |
|
|
1597 |
|
|
1598 if (op1->is_constant () && op2->is_constant () |
|
|
1599 && (! ((Vwarn_associativity_change |
|
|
1600 && (op_type == POW || op_type == EPOW)) |
|
|
1601 || (Vwarn_precedence_change |
|
|
1602 && (op_type == EXPR_OR || op_type == EXPR_OR_OR))))) |
|
2533
|
1603 { |
|
2970
|
1604 octave_value tmp = e->rvalue (); |
|
2533
|
1605 |
|
3489
|
1606 if (! (error_state || warning_state)) |
|
2533
|
1607 { |
|
|
1608 tree_constant *tc_retval = new tree_constant (tmp); |
|
|
1609 |
|
4051
|
1610 OSSTREAM buf; |
|
2533
|
1611 |
|
|
1612 tree_print_code tpc (buf); |
|
|
1613 |
|
|
1614 e->accept (tpc); |
|
|
1615 |
|
4051
|
1616 buf << OSSTREAM_ENDS; |
|
|
1617 |
|
|
1618 tc_retval->stash_original_text (OSSTREAM_STR (buf)); |
|
|
1619 |
|
|
1620 OSSTREAM_FREEZE (buf); |
|
2533
|
1621 |
|
|
1622 delete e; |
|
|
1623 |
|
|
1624 retval = tc_retval; |
|
|
1625 } |
|
|
1626 } |
|
3110
|
1627 |
|
3292
|
1628 unwind_protect::run_frame ("fold_binary_expression"); |
|
|
1629 |
|
|
1630 return retval; |
|
|
1631 } |
|
|
1632 |
|
|
1633 static tree_expression * |
|
|
1634 fold (tree_unary_expression *e) |
|
|
1635 { |
|
|
1636 tree_expression *retval = e; |
|
|
1637 |
|
|
1638 unwind_protect::begin_frame ("fold_unary_expression"); |
|
|
1639 |
|
|
1640 unwind_protect_int (error_state); |
|
4452
|
1641 unwind_protect_int (warning_state); |
|
3292
|
1642 |
|
3815
|
1643 unwind_protect_bool (discard_error_messages); |
|
4452
|
1644 unwind_protect_bool (discard_warning_messages); |
|
|
1645 |
|
3815
|
1646 discard_error_messages = true; |
|
4452
|
1647 discard_warning_messages = true; |
|
3292
|
1648 |
|
|
1649 tree_expression *op = e->operand (); |
|
|
1650 |
|
|
1651 if (op->is_constant ()) |
|
|
1652 { |
|
|
1653 octave_value tmp = e->rvalue (); |
|
|
1654 |
|
3489
|
1655 if (! (error_state || warning_state)) |
|
3292
|
1656 { |
|
|
1657 tree_constant *tc_retval = new tree_constant (tmp); |
|
|
1658 |
|
4051
|
1659 OSSTREAM buf; |
|
3292
|
1660 |
|
|
1661 tree_print_code tpc (buf); |
|
|
1662 |
|
|
1663 e->accept (tpc); |
|
|
1664 |
|
4051
|
1665 buf << OSSTREAM_ENDS; |
|
|
1666 |
|
|
1667 tc_retval->stash_original_text (OSSTREAM_STR (buf)); |
|
|
1668 |
|
|
1669 OSSTREAM_FREEZE (buf); |
|
3292
|
1670 |
|
|
1671 delete e; |
|
|
1672 |
|
|
1673 retval = tc_retval; |
|
|
1674 } |
|
|
1675 } |
|
|
1676 |
|
|
1677 unwind_protect::run_frame ("fold_unary_expression"); |
|
2533
|
1678 |
|
|
1679 return retval; |
|
|
1680 } |
|
|
1681 |
|
1623
|
1682 // Finish building a range. |
|
|
1683 |
|
|
1684 static tree_expression * |
|
|
1685 finish_colon_expression (tree_colon_expression *e) |
|
|
1686 { |
|
3110
|
1687 tree_expression *retval = e; |
|
|
1688 |
|
|
1689 unwind_protect::begin_frame ("finish_colon_expression"); |
|
|
1690 |
|
|
1691 unwind_protect_int (error_state); |
|
4452
|
1692 unwind_protect_int (warning_state); |
|
3110
|
1693 |
|
3815
|
1694 unwind_protect_bool (discard_error_messages); |
|
4452
|
1695 unwind_protect_bool (discard_warning_messages); |
|
|
1696 |
|
3815
|
1697 discard_error_messages = true; |
|
4452
|
1698 discard_warning_messages = true; |
|
1623
|
1699 |
|
2533
|
1700 tree_expression *base = e->base (); |
|
|
1701 tree_expression *limit = e->limit (); |
|
|
1702 tree_expression *incr = e->increment (); |
|
|
1703 |
|
2970
|
1704 if (base) |
|
1623
|
1705 { |
|
2970
|
1706 if (limit) |
|
2533
|
1707 { |
|
2970
|
1708 if (base->is_constant () && limit->is_constant () |
|
|
1709 && (! incr || (incr && incr->is_constant ()))) |
|
|
1710 { |
|
|
1711 octave_value tmp = e->rvalue (); |
|
|
1712 |
|
3489
|
1713 if (! (error_state || warning_state)) |
|
2970
|
1714 { |
|
|
1715 tree_constant *tc_retval = new tree_constant (tmp); |
|
|
1716 |
|
4051
|
1717 OSSTREAM buf; |
|
2970
|
1718 |
|
|
1719 tree_print_code tpc (buf); |
|
|
1720 |
|
|
1721 e->accept (tpc); |
|
|
1722 |
|
4051
|
1723 buf << OSSTREAM_ENDS; |
|
|
1724 |
|
|
1725 tc_retval->stash_original_text (OSSTREAM_STR (buf)); |
|
|
1726 |
|
|
1727 OSSTREAM_FREEZE (buf); |
|
2970
|
1728 |
|
|
1729 delete e; |
|
|
1730 |
|
|
1731 retval = tc_retval; |
|
|
1732 } |
|
|
1733 } |
|
2533
|
1734 } |
|
|
1735 else |
|
2970
|
1736 { |
|
2990
|
1737 e->preserve_base (); |
|
|
1738 delete e; |
|
2970
|
1739 |
|
|
1740 // XXX FIXME XXX -- need to attempt constant folding here |
|
|
1741 // too (we need a generic way to do that). |
|
|
1742 retval = base; |
|
|
1743 } |
|
1623
|
1744 } |
|
|
1745 |
|
3110
|
1746 unwind_protect::run_frame ("finish_colon_expression"); |
|
|
1747 |
|
1623
|
1748 return retval; |
|
|
1749 } |
|
|
1750 |
|
1607
|
1751 // Make a constant. |
|
|
1752 |
|
2375
|
1753 static tree_constant * |
|
1607
|
1754 make_constant (int op, token *tok_val) |
|
|
1755 { |
|
|
1756 int l = tok_val->line (); |
|
|
1757 int c = tok_val->column (); |
|
|
1758 |
|
3216
|
1759 tree_constant *retval = 0; |
|
1607
|
1760 |
|
|
1761 switch (op) |
|
|
1762 { |
|
|
1763 case NUM: |
|
2533
|
1764 { |
|
2883
|
1765 octave_value tmp (tok_val->number ()); |
|
|
1766 retval = new tree_constant (tmp, l, c); |
|
2533
|
1767 retval->stash_original_text (tok_val->text_rep ()); |
|
|
1768 } |
|
1607
|
1769 break; |
|
|
1770 |
|
|
1771 case IMAG_NUM: |
|
|
1772 { |
|
2883
|
1773 octave_value tmp (Complex (0.0, tok_val->number ())); |
|
|
1774 retval = new tree_constant (tmp, l, c); |
|
1607
|
1775 retval->stash_original_text (tok_val->text_rep ()); |
|
|
1776 } |
|
|
1777 break; |
|
|
1778 |
|
5279
|
1779 case DQ_STRING: |
|
|
1780 case SQ_STRING: |
|
2883
|
1781 { |
|
5279
|
1782 octave_value tmp (tok_val->text (), op == DQ_STRING ? '"' : '\''); |
|
2883
|
1783 retval = new tree_constant (tmp, l, c); |
|
|
1784 } |
|
1607
|
1785 break; |
|
|
1786 |
|
|
1787 default: |
|
|
1788 panic_impossible (); |
|
|
1789 break; |
|
|
1790 } |
|
|
1791 |
|
|
1792 return retval; |
|
|
1793 } |
|
|
1794 |
|
4342
|
1795 // Make a function handle. |
|
|
1796 |
|
|
1797 static tree_fcn_handle * |
|
|
1798 make_fcn_handle (token *tok_val) |
|
|
1799 { |
|
|
1800 int l = tok_val->line (); |
|
|
1801 int c = tok_val->column (); |
|
|
1802 |
|
|
1803 tree_fcn_handle *retval = new tree_fcn_handle (tok_val->text (), l, c); |
|
|
1804 |
|
|
1805 return retval; |
|
|
1806 } |
|
|
1807 |
|
4935
|
1808 // Make an anonymous function handle. |
|
|
1809 |
|
|
1810 static tree_constant * |
|
|
1811 make_anon_fcn_handle (tree_parameter_list *param_list, tree_statement *stmt) |
|
|
1812 { |
|
|
1813 // XXX FIXME XXX -- need to get these from the location of the @ symbol. |
|
|
1814 |
|
|
1815 int l = -1; |
|
|
1816 int c = -1; |
|
|
1817 |
|
|
1818 tree_parameter_list *ret_list = 0; |
|
|
1819 |
|
|
1820 if (stmt && stmt->is_expression ()) |
|
|
1821 { |
|
|
1822 symbol_record *sr = curr_sym_tab->lookup ("__retval__", true); |
|
|
1823 |
|
|
1824 tree_expression *e = stmt->expression (); |
|
|
1825 |
|
|
1826 tree_identifier *id = new tree_identifier (sr); |
|
|
1827 |
|
|
1828 tree_simple_assignment *asn = new tree_simple_assignment (id, e); |
|
|
1829 |
|
|
1830 stmt->set_expression (asn); |
|
|
1831 |
|
|
1832 stmt->set_print_flag (false); |
|
|
1833 |
|
|
1834 // XXX FIXME XXX -- would like to delete old_stmt here or |
|
|
1835 // replace expression inside it with the new expression we just |
|
|
1836 // created so we don't have to create a new statement at all. |
|
|
1837 |
|
|
1838 id = new tree_identifier (sr); |
|
|
1839 |
|
|
1840 ret_list = new tree_parameter_list (id); |
|
|
1841 } |
|
|
1842 |
|
|
1843 tree_statement_list *body = new tree_statement_list (stmt); |
|
|
1844 |
|
|
1845 body->mark_as_function_body (); |
|
|
1846 |
|
5013
|
1847 octave_value fcn (new octave_user_function (param_list, ret_list, |
|
|
1848 body, curr_sym_tab)); |
|
4935
|
1849 |
|
|
1850 if (symtab_context.empty ()) |
|
|
1851 panic_impossible (); |
|
|
1852 |
|
|
1853 curr_sym_tab = symtab_context.top (); |
|
|
1854 symtab_context.pop (); |
|
|
1855 |
|
|
1856 octave_value fh (new octave_fcn_handle (fcn, "@<anonymous>")); |
|
|
1857 |
|
|
1858 tree_constant *retval = new tree_constant (fh, l, c); |
|
|
1859 |
|
|
1860 return retval; |
|
|
1861 } |
|
|
1862 |
|
5161
|
1863 static void |
|
|
1864 maybe_warn_associativity_change (tree_expression *op) |
|
|
1865 { |
|
|
1866 if (Vwarn_associativity_change |
|
|
1867 && op->paren_count () == 0 && op->is_binary_expression ()) |
|
|
1868 { |
|
|
1869 tree_binary_expression *e |
|
|
1870 = dynamic_cast<tree_binary_expression *> (op); |
|
|
1871 |
|
|
1872 octave_value::binary_op op_type = e->op_type (); |
|
|
1873 |
|
|
1874 if (op_type == octave_value::op_pow |
|
|
1875 || op_type == octave_value::op_el_pow) |
|
|
1876 { |
|
|
1877 std::string op_str = octave_value::binary_op_as_string (op_type); |
|
|
1878 |
|
|
1879 warning ("meaning may have changed due to change in associativity for %s operator", op_str.c_str ()); |
|
|
1880 } |
|
|
1881 } |
|
|
1882 } |
|
|
1883 |
|
666
|
1884 // Build a binary expression. |
|
|
1885 |
|
578
|
1886 static tree_expression * |
|
|
1887 make_binary_op (int op, tree_expression *op1, token *tok_val, |
|
|
1888 tree_expression *op2) |
|
|
1889 { |
|
2883
|
1890 octave_value::binary_op t = octave_value::unknown_binary_op; |
|
1623
|
1891 |
|
578
|
1892 switch (op) |
|
|
1893 { |
|
|
1894 case POW: |
|
3525
|
1895 t = octave_value::op_pow; |
|
5161
|
1896 maybe_warn_associativity_change (op1); |
|
578
|
1897 break; |
|
777
|
1898 |
|
578
|
1899 case EPOW: |
|
3525
|
1900 t = octave_value::op_el_pow; |
|
5161
|
1901 maybe_warn_associativity_change (op1); |
|
578
|
1902 break; |
|
777
|
1903 |
|
578
|
1904 case '+': |
|
3525
|
1905 t = octave_value::op_add; |
|
578
|
1906 break; |
|
777
|
1907 |
|
578
|
1908 case '-': |
|
3525
|
1909 t = octave_value::op_sub; |
|
578
|
1910 break; |
|
777
|
1911 |
|
578
|
1912 case '*': |
|
3525
|
1913 t = octave_value::op_mul; |
|
578
|
1914 break; |
|
777
|
1915 |
|
578
|
1916 case '/': |
|
3525
|
1917 t = octave_value::op_div; |
|
578
|
1918 break; |
|
777
|
1919 |
|
578
|
1920 case EMUL: |
|
3525
|
1921 t = octave_value::op_el_mul; |
|
578
|
1922 break; |
|
777
|
1923 |
|
578
|
1924 case EDIV: |
|
3525
|
1925 t = octave_value::op_el_div; |
|
578
|
1926 break; |
|
777
|
1927 |
|
578
|
1928 case LEFTDIV: |
|
3525
|
1929 t = octave_value::op_ldiv; |
|
578
|
1930 break; |
|
777
|
1931 |
|
578
|
1932 case ELEFTDIV: |
|
3525
|
1933 t = octave_value::op_el_ldiv; |
|
578
|
1934 break; |
|
777
|
1935 |
|
2899
|
1936 case LSHIFT: |
|
3525
|
1937 t = octave_value::op_lshift; |
|
2899
|
1938 break; |
|
|
1939 |
|
|
1940 case RSHIFT: |
|
3525
|
1941 t = octave_value::op_rshift; |
|
2899
|
1942 break; |
|
|
1943 |
|
578
|
1944 case EXPR_LT: |
|
3525
|
1945 t = octave_value::op_lt; |
|
578
|
1946 break; |
|
777
|
1947 |
|
578
|
1948 case EXPR_LE: |
|
3525
|
1949 t = octave_value::op_le; |
|
578
|
1950 break; |
|
777
|
1951 |
|
578
|
1952 case EXPR_EQ: |
|
3525
|
1953 t = octave_value::op_eq; |
|
578
|
1954 break; |
|
777
|
1955 |
|
578
|
1956 case EXPR_GE: |
|
3525
|
1957 t = octave_value::op_ge; |
|
578
|
1958 break; |
|
777
|
1959 |
|
578
|
1960 case EXPR_GT: |
|
3525
|
1961 t = octave_value::op_gt; |
|
578
|
1962 break; |
|
777
|
1963 |
|
578
|
1964 case EXPR_NE: |
|
3525
|
1965 t = octave_value::op_ne; |
|
578
|
1966 break; |
|
777
|
1967 |
|
578
|
1968 case EXPR_AND: |
|
3525
|
1969 t = octave_value::op_el_and; |
|
578
|
1970 break; |
|
777
|
1971 |
|
578
|
1972 case EXPR_OR: |
|
3525
|
1973 t = octave_value::op_el_or; |
|
4023
|
1974 if (Vwarn_precedence_change |
|
4024
|
1975 && op2->paren_count () == 0 && op2->is_binary_expression ()) |
|
4023
|
1976 { |
|
|
1977 tree_binary_expression *e |
|
|
1978 = dynamic_cast<tree_binary_expression *> (op2); |
|
|
1979 |
|
|
1980 if (e->op_type () == octave_value::op_el_and) |
|
|
1981 warning ("meaning may have changed due to change in precedence for & and | operators"); |
|
|
1982 } |
|
578
|
1983 break; |
|
777
|
1984 |
|
578
|
1985 default: |
|
|
1986 panic_impossible (); |
|
|
1987 break; |
|
|
1988 } |
|
|
1989 |
|
|
1990 int l = tok_val->line (); |
|
|
1991 int c = tok_val->column (); |
|
|
1992 |
|
2533
|
1993 tree_binary_expression *e |
|
|
1994 = new tree_binary_expression (op1, op2, l, c, t); |
|
1623
|
1995 |
|
2533
|
1996 return fold (e); |
|
578
|
1997 } |
|
|
1998 |
|
2375
|
1999 // Build a boolean expression. |
|
666
|
2000 |
|
578
|
2001 static tree_expression * |
|
2375
|
2002 make_boolean_op (int op, tree_expression *op1, token *tok_val, |
|
|
2003 tree_expression *op2) |
|
578
|
2004 { |
|
2375
|
2005 tree_boolean_expression::type t; |
|
|
2006 |
|
578
|
2007 switch (op) |
|
|
2008 { |
|
2375
|
2009 case EXPR_AND_AND: |
|
2805
|
2010 t = tree_boolean_expression::bool_and; |
|
578
|
2011 break; |
|
777
|
2012 |
|
2375
|
2013 case EXPR_OR_OR: |
|
2805
|
2014 t = tree_boolean_expression::bool_or; |
|
4023
|
2015 if (Vwarn_precedence_change |
|
4024
|
2016 && op2->paren_count () == 0 && op2->is_boolean_expression ()) |
|
4023
|
2017 { |
|
|
2018 tree_boolean_expression *e |
|
|
2019 = dynamic_cast<tree_boolean_expression *> (op2); |
|
|
2020 |
|
|
2021 if (e->op_type () == tree_boolean_expression::bool_and) |
|
|
2022 warning ("meaning may have changed due to change in precedence for && and || operators"); |
|
|
2023 } |
|
578
|
2024 break; |
|
777
|
2025 |
|
578
|
2026 default: |
|
|
2027 panic_impossible (); |
|
|
2028 break; |
|
|
2029 } |
|
|
2030 |
|
|
2031 int l = tok_val->line (); |
|
|
2032 int c = tok_val->column (); |
|
|
2033 |
|
2533
|
2034 tree_boolean_expression *e |
|
|
2035 = new tree_boolean_expression (op1, op2, l, c, t); |
|
2375
|
2036 |
|
2533
|
2037 return fold (e); |
|
578
|
2038 } |
|
|
2039 |
|
2375
|
2040 // Build a prefix expression. |
|
666
|
2041 |
|
578
|
2042 static tree_expression * |
|
2960
|
2043 make_prefix_op (int op, tree_expression *op1, token *tok_val) |
|
578
|
2044 { |
|
3203
|
2045 octave_value::unary_op t = octave_value::unknown_unary_op; |
|
2375
|
2046 |
|
578
|
2047 switch (op) |
|
|
2048 { |
|
2960
|
2049 case EXPR_NOT: |
|
3525
|
2050 t = octave_value::op_not; |
|
2960
|
2051 break; |
|
|
2052 |
|
4965
|
2053 case '+': |
|
|
2054 t = octave_value::op_uplus; |
|
|
2055 break; |
|
|
2056 |
|
2960
|
2057 case '-': |
|
3525
|
2058 t = octave_value::op_uminus; |
|
2960
|
2059 break; |
|
|
2060 |
|
578
|
2061 case PLUS_PLUS: |
|
3525
|
2062 t = octave_value::op_incr; |
|
578
|
2063 break; |
|
777
|
2064 |
|
578
|
2065 case MINUS_MINUS: |
|
3525
|
2066 t = octave_value::op_decr; |
|
578
|
2067 break; |
|
777
|
2068 |
|
578
|
2069 default: |
|
|
2070 panic_impossible (); |
|
|
2071 break; |
|
|
2072 } |
|
|
2073 |
|
|
2074 int l = tok_val->line (); |
|
|
2075 int c = tok_val->column (); |
|
|
2076 |
|
3292
|
2077 tree_prefix_expression *e |
|
|
2078 = new tree_prefix_expression (op1, l, c, t); |
|
|
2079 |
|
|
2080 return fold (e); |
|
578
|
2081 } |
|
|
2082 |
|
2375
|
2083 // Build a postfix expression. |
|
666
|
2084 |
|
578
|
2085 static tree_expression * |
|
2960
|
2086 make_postfix_op (int op, tree_expression *op1, token *tok_val) |
|
578
|
2087 { |
|
3203
|
2088 octave_value::unary_op t = octave_value::unknown_unary_op; |
|
1623
|
2089 |
|
578
|
2090 switch (op) |
|
|
2091 { |
|
2960
|
2092 case QUOTE: |
|
3525
|
2093 t = octave_value::op_hermitian; |
|
2960
|
2094 break; |
|
|
2095 |
|
|
2096 case TRANSPOSE: |
|
3525
|
2097 t = octave_value::op_transpose; |
|
2960
|
2098 break; |
|
|
2099 |
|
2375
|
2100 case PLUS_PLUS: |
|
3525
|
2101 t = octave_value::op_incr; |
|
578
|
2102 break; |
|
777
|
2103 |
|
2375
|
2104 case MINUS_MINUS: |
|
3525
|
2105 t = octave_value::op_decr; |
|
578
|
2106 break; |
|
777
|
2107 |
|
578
|
2108 default: |
|
|
2109 panic_impossible (); |
|
|
2110 break; |
|
|
2111 } |
|
|
2112 |
|
|
2113 int l = tok_val->line (); |
|
|
2114 int c = tok_val->column (); |
|
|
2115 |
|
3292
|
2116 tree_postfix_expression *e |
|
|
2117 = new tree_postfix_expression (op1, l, c, t); |
|
|
2118 |
|
|
2119 return fold (e); |
|
1623
|
2120 } |
|
|
2121 |
|
|
2122 // Build an unwind-protect command. |
|
|
2123 |
|
|
2124 static tree_command * |
|
|
2125 make_unwind_command (token *unwind_tok, tree_statement_list *body, |
|
3665
|
2126 tree_statement_list *cleanup, token *end_tok, |
|
|
2127 octave_comment_list *lc, octave_comment_list *mc) |
|
1623
|
2128 { |
|
|
2129 tree_command *retval = 0; |
|
|
2130 |
|
2857
|
2131 if (end_token_ok (end_tok, token::unwind_protect_end)) |
|
1623
|
2132 { |
|
3665
|
2133 octave_comment_list *tc = octave_comment_buffer::get_comment (); |
|
|
2134 |
|
1623
|
2135 int l = unwind_tok->line (); |
|
|
2136 int c = unwind_tok->column (); |
|
|
2137 |
|
3665
|
2138 retval = new tree_unwind_protect_command (body, cleanup, |
|
|
2139 lc, mc, tc, l, c); |
|
1623
|
2140 } |
|
|
2141 |
|
|
2142 return retval; |
|
|
2143 } |
|
|
2144 |
|
|
2145 // Build a try-catch command. |
|
|
2146 |
|
|
2147 static tree_command * |
|
|
2148 make_try_command (token *try_tok, tree_statement_list *body, |
|
3665
|
2149 tree_statement_list *cleanup, token *end_tok, |
|
|
2150 octave_comment_list *lc, octave_comment_list *mc) |
|
1623
|
2151 { |
|
|
2152 tree_command *retval = 0; |
|
|
2153 |
|
2857
|
2154 if (end_token_ok (end_tok, token::try_catch_end)) |
|
1623
|
2155 { |
|
3665
|
2156 octave_comment_list *tc = octave_comment_buffer::get_comment (); |
|
|
2157 |
|
1623
|
2158 int l = try_tok->line (); |
|
|
2159 int c = try_tok->column (); |
|
|
2160 |
|
3665
|
2161 retval = new tree_try_catch_command (body, cleanup, |
|
|
2162 lc, mc, tc, l, c); |
|
1623
|
2163 } |
|
|
2164 |
|
|
2165 return retval; |
|
|
2166 } |
|
|
2167 |
|
|
2168 // Build a while command. |
|
|
2169 |
|
|
2170 static tree_command * |
|
|
2171 make_while_command (token *while_tok, tree_expression *expr, |
|
3665
|
2172 tree_statement_list *body, token *end_tok, |
|
|
2173 octave_comment_list *lc) |
|
1623
|
2174 { |
|
|
2175 tree_command *retval = 0; |
|
|
2176 |
|
|
2177 maybe_warn_assign_as_truth_value (expr); |
|
|
2178 |
|
2857
|
2179 if (end_token_ok (end_tok, token::while_end)) |
|
1623
|
2180 { |
|
3665
|
2181 octave_comment_list *tc = octave_comment_buffer::get_comment (); |
|
|
2182 |
|
1826
|
2183 lexer_flags.looping--; |
|
1623
|
2184 |
|
|
2185 int l = while_tok->line (); |
|
|
2186 int c = while_tok->column (); |
|
|
2187 |
|
3665
|
2188 retval = new tree_while_command (expr, body, lc, tc, l, c); |
|
1623
|
2189 } |
|
|
2190 |
|
|
2191 return retval; |
|
|
2192 } |
|
|
2193 |
|
3484
|
2194 // Build a do-until command. |
|
|
2195 |
|
|
2196 static tree_command * |
|
|
2197 make_do_until_command (token *do_tok, tree_statement_list *body, |
|
3665
|
2198 tree_expression *expr, octave_comment_list *lc) |
|
3484
|
2199 { |
|
|
2200 tree_command *retval = 0; |
|
|
2201 |
|
|
2202 maybe_warn_assign_as_truth_value (expr); |
|
|
2203 |
|
3665
|
2204 octave_comment_list *tc = octave_comment_buffer::get_comment (); |
|
|
2205 |
|
3484
|
2206 lexer_flags.looping--; |
|
|
2207 |
|
|
2208 int l = do_tok->line (); |
|
|
2209 int c = do_tok->column (); |
|
|
2210 |
|
3665
|
2211 retval = new tree_do_until_command (expr, body, lc, tc, l, c); |
|
3484
|
2212 |
|
|
2213 return retval; |
|
|
2214 } |
|
|
2215 |
|
1623
|
2216 // Build a for command. |
|
|
2217 |
|
|
2218 static tree_command * |
|
2970
|
2219 make_for_command (token *for_tok, tree_argument_list *lhs, |
|
1623
|
2220 tree_expression *expr, tree_statement_list *body, |
|
3665
|
2221 token *end_tok, octave_comment_list *lc) |
|
1623
|
2222 { |
|
|
2223 tree_command *retval = 0; |
|
|
2224 |
|
2857
|
2225 if (end_token_ok (end_tok, token::for_end)) |
|
1623
|
2226 { |
|
3665
|
2227 octave_comment_list *tc = octave_comment_buffer::get_comment (); |
|
|
2228 |
|
1826
|
2229 lexer_flags.looping--; |
|
1623
|
2230 |
|
|
2231 int l = for_tok->line (); |
|
|
2232 int c = for_tok->column (); |
|
|
2233 |
|
2970
|
2234 if (lhs->length () == 1) |
|
|
2235 { |
|
|
2236 tree_expression *tmp = lhs->remove_front (); |
|
|
2237 |
|
3665
|
2238 retval = new tree_simple_for_command (tmp, expr, body, |
|
|
2239 lc, tc, l, c); |
|
2970
|
2240 |
|
|
2241 delete lhs; |
|
|
2242 } |
|
|
2243 else |
|
3665
|
2244 retval = new tree_complex_for_command (lhs, expr, body, |
|
|
2245 lc, tc, l, c); |
|
1623
|
2246 } |
|
|
2247 |
|
|
2248 return retval; |
|
|
2249 } |
|
|
2250 |
|
4207
|
2251 // Build a break command. |
|
|
2252 |
|
|
2253 static tree_command * |
|
|
2254 make_break_command (token *break_tok) |
|
1623
|
2255 { |
|
4207
|
2256 tree_command *retval = 0; |
|
1623
|
2257 |
|
2620
|
2258 int l = break_tok->line (); |
|
|
2259 int c = break_tok->column (); |
|
|
2260 |
|
3489
|
2261 if (lexer_flags.looping || lexer_flags.defining_func |
|
3877
|
2262 || reading_script_file || evaluating_function_body |
|
|
2263 || evaluating_looping_command) |
|
4207
|
2264 retval = new tree_break_command (l, c); |
|
1623
|
2265 else |
|
4207
|
2266 retval = new tree_no_op_command ("break", l, c); |
|
1623
|
2267 |
|
|
2268 return retval; |
|
|
2269 } |
|
|
2270 |
|
4207
|
2271 // Build a continue command. |
|
|
2272 |
|
|
2273 static tree_command * |
|
|
2274 make_continue_command (token *continue_tok) |
|
1623
|
2275 { |
|
4207
|
2276 tree_command *retval = 0; |
|
1623
|
2277 |
|
2620
|
2278 int l = continue_tok->line (); |
|
|
2279 int c = continue_tok->column (); |
|
|
2280 |
|
3877
|
2281 if (lexer_flags.looping || evaluating_looping_command) |
|
4207
|
2282 retval = new tree_continue_command (l, c); |
|
1623
|
2283 else |
|
4207
|
2284 retval = new tree_no_op_command ("continue", l, c); |
|
1623
|
2285 |
|
|
2286 return retval; |
|
|
2287 } |
|
|
2288 |
|
4207
|
2289 // Build a return command. |
|
|
2290 |
|
|
2291 static tree_command * |
|
|
2292 make_return_command (token *return_tok) |
|
1623
|
2293 { |
|
4207
|
2294 tree_command *retval = 0; |
|
1623
|
2295 |
|
2620
|
2296 int l = return_tok->line (); |
|
|
2297 int c = return_tok->column (); |
|
|
2298 |
|
3489
|
2299 if (lexer_flags.defining_func || reading_script_file |
|
|
2300 || evaluating_function_body) |
|
4207
|
2301 retval = new tree_return_command (l, c); |
|
1623
|
2302 else |
|
4207
|
2303 retval = new tree_no_op_command ("return", l, c); |
|
1623
|
2304 |
|
|
2305 return retval; |
|
|
2306 } |
|
|
2307 |
|
|
2308 // Start an if command. |
|
|
2309 |
|
|
2310 static tree_if_command_list * |
|
|
2311 start_if_command (tree_expression *expr, tree_statement_list *list) |
|
|
2312 { |
|
|
2313 maybe_warn_assign_as_truth_value (expr); |
|
|
2314 |
|
|
2315 tree_if_clause *t = new tree_if_clause (expr, list); |
|
|
2316 |
|
|
2317 return new tree_if_command_list (t); |
|
|
2318 } |
|
|
2319 |
|
|
2320 // Finish an if command. |
|
|
2321 |
|
|
2322 static tree_if_command * |
|
|
2323 finish_if_command (token *if_tok, tree_if_command_list *list, |
|
3665
|
2324 token *end_tok, octave_comment_list *lc) |
|
1623
|
2325 { |
|
|
2326 tree_if_command *retval = 0; |
|
|
2327 |
|
2857
|
2328 if (end_token_ok (end_tok, token::if_end)) |
|
1623
|
2329 { |
|
3665
|
2330 octave_comment_list *tc = octave_comment_buffer::get_comment (); |
|
|
2331 |
|
1623
|
2332 int l = if_tok->line (); |
|
|
2333 int c = if_tok->column (); |
|
|
2334 |
|
3665
|
2335 retval = new tree_if_command (list, lc, tc, l, c); |
|
1623
|
2336 } |
|
|
2337 |
|
|
2338 return retval; |
|
|
2339 } |
|
|
2340 |
|
|
2341 // Build an elseif clause. |
|
|
2342 |
|
|
2343 static tree_if_clause * |
|
3665
|
2344 make_elseif_clause (tree_expression *expr, tree_statement_list *list, |
|
|
2345 octave_comment_list *lc) |
|
1623
|
2346 { |
|
|
2347 maybe_warn_assign_as_truth_value (expr); |
|
|
2348 |
|
3665
|
2349 return new tree_if_clause (expr, list, lc); |
|
1623
|
2350 } |
|
|
2351 |
|
2764
|
2352 // Finish a switch command. |
|
|
2353 |
|
|
2354 static tree_switch_command * |
|
|
2355 finish_switch_command (token *switch_tok, tree_expression *expr, |
|
3665
|
2356 tree_switch_case_list *list, token *end_tok, |
|
|
2357 octave_comment_list *lc) |
|
2764
|
2358 { |
|
|
2359 tree_switch_command *retval = 0; |
|
|
2360 |
|
2857
|
2361 if (end_token_ok (end_tok, token::switch_end)) |
|
2764
|
2362 { |
|
3665
|
2363 octave_comment_list *tc = octave_comment_buffer::get_comment (); |
|
|
2364 |
|
2764
|
2365 int l = switch_tok->line (); |
|
|
2366 int c = switch_tok->column (); |
|
|
2367 |
|
3665
|
2368 retval = new tree_switch_command (expr, list, lc, tc, l, c); |
|
2764
|
2369 } |
|
|
2370 |
|
|
2371 return retval; |
|
|
2372 } |
|
|
2373 |
|
|
2374 // Build a switch case. |
|
|
2375 |
|
|
2376 static tree_switch_case * |
|
3665
|
2377 make_switch_case (tree_expression *expr, tree_statement_list *list, |
|
|
2378 octave_comment_list *lc) |
|
2764
|
2379 { |
|
|
2380 maybe_warn_variable_switch_label (expr); |
|
|
2381 |
|
3665
|
2382 return new tree_switch_case (expr, list, lc); |
|
2764
|
2383 } |
|
|
2384 |
|
1623
|
2385 // Build an assignment to a variable. |
|
|
2386 |
|
|
2387 static tree_expression * |
|
2970
|
2388 make_assign_op (int op, tree_argument_list *lhs, token *eq_tok, |
|
|
2389 tree_expression *rhs) |
|
1623
|
2390 { |
|
2970
|
2391 tree_expression *retval = 0; |
|
|
2392 |
|
2883
|
2393 octave_value::assign_op t = octave_value::unknown_assign_op; |
|
|
2394 |
|
|
2395 switch (op) |
|
|
2396 { |
|
|
2397 case '=': |
|
3525
|
2398 t = octave_value::op_asn_eq; |
|
2883
|
2399 break; |
|
|
2400 |
|
|
2401 case ADD_EQ: |
|
3525
|
2402 t = octave_value::op_add_eq; |
|
2883
|
2403 break; |
|
|
2404 |
|
|
2405 case SUB_EQ: |
|
3525
|
2406 t = octave_value::op_sub_eq; |
|
2883
|
2407 break; |
|
|
2408 |
|
|
2409 case MUL_EQ: |
|
3525
|
2410 t = octave_value::op_mul_eq; |
|
2883
|
2411 break; |
|
|
2412 |
|
|
2413 case DIV_EQ: |
|
3525
|
2414 t = octave_value::op_div_eq; |
|
2883
|
2415 break; |
|
|
2416 |
|
3204
|
2417 case LEFTDIV_EQ: |
|
3525
|
2418 t = octave_value::op_ldiv_eq; |
|
3204
|
2419 break; |
|
|
2420 |
|
4018
|
2421 case POW_EQ: |
|
|
2422 t = octave_value::op_pow_eq; |
|
|
2423 break; |
|
|
2424 |
|
2899
|
2425 case LSHIFT_EQ: |
|
3525
|
2426 t = octave_value::op_lshift_eq; |
|
2899
|
2427 break; |
|
|
2428 |
|
|
2429 case RSHIFT_EQ: |
|
3525
|
2430 t = octave_value::op_rshift_eq; |
|
2899
|
2431 break; |
|
|
2432 |
|
2883
|
2433 case EMUL_EQ: |
|
3525
|
2434 t = octave_value::op_el_mul_eq; |
|
2883
|
2435 break; |
|
|
2436 |
|
|
2437 case EDIV_EQ: |
|
3525
|
2438 t = octave_value::op_el_div_eq; |
|
2883
|
2439 break; |
|
|
2440 |
|
3204
|
2441 case ELEFTDIV_EQ: |
|
3525
|
2442 t = octave_value::op_el_ldiv_eq; |
|
3204
|
2443 break; |
|
|
2444 |
|
4018
|
2445 case EPOW_EQ: |
|
|
2446 t = octave_value::op_el_pow_eq; |
|
|
2447 break; |
|
|
2448 |
|
2883
|
2449 case AND_EQ: |
|
3525
|
2450 t = octave_value::op_el_and_eq; |
|
2883
|
2451 break; |
|
|
2452 |
|
|
2453 case OR_EQ: |
|
3525
|
2454 t = octave_value::op_el_or_eq; |
|
2883
|
2455 break; |
|
|
2456 |
|
|
2457 default: |
|
|
2458 panic_impossible (); |
|
|
2459 break; |
|
|
2460 } |
|
|
2461 |
|
1623
|
2462 int l = eq_tok->line (); |
|
|
2463 int c = eq_tok->column (); |
|
|
2464 |
|
2970
|
2465 if (lhs->length () == 1) |
|
666
|
2466 { |
|
2970
|
2467 tree_expression *tmp = lhs->remove_front (); |
|
|
2468 |
|
|
2469 retval = new tree_simple_assignment (tmp, rhs, false, l, c, t); |
|
|
2470 |
|
|
2471 delete lhs; |
|
666
|
2472 } |
|
|
2473 else |
|
3208
|
2474 return new tree_multi_assignment (lhs, rhs, false, l, c, t); |
|
666
|
2475 |
|
|
2476 return retval; |
|
|
2477 } |
|
751
|
2478 |
|
1623
|
2479 // Begin defining a function. |
|
|
2480 |
|
2891
|
2481 static octave_user_function * |
|
|
2482 start_function (tree_parameter_list *param_list, tree_statement_list *body) |
|
1623
|
2483 { |
|
|
2484 body->mark_as_function_body (); |
|
|
2485 |
|
2891
|
2486 // We'll fill in the return list later. |
|
|
2487 |
|
|
2488 octave_user_function *fcn |
|
|
2489 = new octave_user_function (param_list, 0, body, curr_sym_tab); |
|
1623
|
2490 |
|
3665
|
2491 if (fcn) |
|
|
2492 { |
|
|
2493 octave_comment_list *tc = octave_comment_buffer::get_comment (); |
|
|
2494 |
|
|
2495 fcn->stash_trailing_comment (tc); |
|
|
2496 } |
|
|
2497 |
|
1623
|
2498 return fcn; |
|
|
2499 } |
|
|
2500 |
|
|
2501 // Do most of the work for defining a function. |
|
|
2502 |
|
2891
|
2503 static octave_user_function * |
|
4872
|
2504 frob_function (const std::string& fname, octave_user_function *fcn) |
|
1623
|
2505 { |
|
4872
|
2506 std::string id_name = fname; |
|
1623
|
2507 |
|
|
2508 // If input is coming from a file, issue a warning if the name of |
|
|
2509 // the file does not match the name of the function stated in the |
|
|
2510 // file. Matlab doesn't provide a diagnostic (it ignores the stated |
|
|
2511 // name). |
|
|
2512 |
|
|
2513 if (reading_fcn_file) |
|
|
2514 { |
|
4238
|
2515 if (! lexer_flags.parsing_nested_function |
|
|
2516 && curr_fcn_file_name != id_name) |
|
1623
|
2517 { |
|
2166
|
2518 if (Vwarn_function_name_clash) |
|
1623
|
2519 warning ("function name `%s' does not agree with function\ |
|
1755
|
2520 file name `%s'", id_name.c_str (), curr_fcn_file_full_name.c_str ()); |
|
1623
|
2521 |
|
4872
|
2522 id_name = curr_fcn_file_name; |
|
1623
|
2523 } |
|
|
2524 |
|
3712
|
2525 octave_time now; |
|
3162
|
2526 |
|
4343
|
2527 fcn->stash_fcn_file_name (curr_fcn_file_full_name); |
|
3162
|
2528 fcn->stash_fcn_file_time (now); |
|
1623
|
2529 fcn->mark_as_system_fcn_file (); |
|
3162
|
2530 |
|
|
2531 if (Vwarn_future_time_stamp) |
|
|
2532 { |
|
3523
|
2533 std::string nm = fcn->fcn_file_name (); |
|
3162
|
2534 |
|
|
2535 file_stat fs (nm); |
|
|
2536 |
|
|
2537 if (fs && fs.is_newer (now)) |
|
|
2538 warning ("time stamp for `%s' is in the future", nm.c_str ()); |
|
|
2539 } |
|
1623
|
2540 } |
|
|
2541 else if (! (input_from_tmp_history_file || input_from_startup_file) |
|
|
2542 && reading_script_file |
|
1755
|
2543 && curr_fcn_file_name == id_name) |
|
1623
|
2544 { |
|
|
2545 warning ("function `%s' defined within script file `%s'", |
|
1755
|
2546 id_name.c_str (), curr_fcn_file_full_name.c_str ()); |
|
1623
|
2547 } |
|
|
2548 |
|
4872
|
2549 fcn->stash_function_name (id_name); |
|
|
2550 |
|
5006
|
2551 // Enter the new function in fbi_sym_tab. If there is already a |
|
|
2552 // variable of the same name in the current symbol table, we won't |
|
|
2553 // find the new function when we try to call it, so we need to clear |
|
|
2554 // the old symbol from the current symbol table. Note that this |
|
|
2555 // means that for things like |
|
|
2556 // |
|
|
2557 // function f () eval ("function g () 1, end"); end |
|
|
2558 // g = 13; |
|
|
2559 // f (); |
|
|
2560 // g |
|
|
2561 // |
|
|
2562 // G will still refer to the variable G (with value 13) rather |
|
|
2563 // than the function G, until the variable G is cleared. |
|
|
2564 |
|
|
2565 curr_sym_tab->clear (id_name); |
|
1623
|
2566 |
|
4872
|
2567 symbol_record *sr = fbi_sym_tab->lookup (id_name, true); |
|
2791
|
2568 |
|
|
2569 if (sr) |
|
4238
|
2570 { |
|
|
2571 fcn->stash_symtab_ptr (sr); |
|
|
2572 |
|
|
2573 if (lexer_flags.parsing_nested_function) |
|
5397
|
2574 { |
|
|
2575 fcn->mark_as_nested_function (); |
|
|
2576 sr->hide (); |
|
|
2577 } |
|
4238
|
2578 } |
|
2791
|
2579 else |
|
|
2580 panic_impossible (); |
|
|
2581 |
|
4872
|
2582 sr->define (fcn, symbol_record::USER_FUNCTION); |
|
1755
|
2583 |
|
4426
|
2584 if (! help_buf.empty ()) |
|
|
2585 { |
|
4872
|
2586 sr->document (help_buf.top ()); |
|
4426
|
2587 help_buf.pop (); |
|
|
2588 } |
|
3844
|
2589 |
|
5397
|
2590 // Also insert the full name in the symbol table. This way, we can |
|
|
2591 // properly cope with changes to LOADPATH. |
|
|
2592 |
|
|
2593 if (reading_fcn_file) |
|
|
2594 { |
|
|
2595 symbol_record *full_sr |
|
|
2596 = fbi_sym_tab->lookup (curr_fcn_file_full_name, true); |
|
|
2597 |
|
|
2598 full_sr->alias (sr, true); |
|
|
2599 full_sr->hide (); |
|
|
2600 } |
|
|
2601 |
|
4240
|
2602 if (lexer_flags.parsing_nested_function < 0) |
|
|
2603 lexer_flags.parsing_nested_function = 0; |
|
4426
|
2604 |
|
1623
|
2605 return fcn; |
|
|
2606 } |
|
|
2607 |
|
|
2608 // Finish defining a function. |
|
|
2609 |
|
2891
|
2610 static octave_user_function * |
|
3665
|
2611 finish_function (tree_identifier *id, octave_user_function *fcn, |
|
|
2612 octave_comment_list *lc) |
|
1623
|
2613 { |
|
2883
|
2614 tree_parameter_list *tpl = new tree_parameter_list (id); |
|
1623
|
2615 |
|
|
2616 tpl->mark_as_formal_parameters (); |
|
|
2617 |
|
3665
|
2618 fcn->stash_leading_comment (lc); |
|
|
2619 |
|
1623
|
2620 return fcn->define_ret_list (tpl); |
|
|
2621 } |
|
|
2622 |
|
|
2623 // Finish defining a function a different way. |
|
|
2624 |
|
2891
|
2625 static octave_user_function * |
|
3665
|
2626 finish_function (tree_parameter_list *ret_list, |
|
|
2627 octave_user_function *fcn, octave_comment_list *lc) |
|
1623
|
2628 { |
|
|
2629 ret_list->mark_as_formal_parameters (); |
|
|
2630 |
|
3665
|
2631 fcn->stash_leading_comment (lc); |
|
|
2632 |
|
1623
|
2633 return fcn->define_ret_list (ret_list); |
|
|
2634 } |
|
|
2635 |
|
2883
|
2636 static void |
|
|
2637 recover_from_parsing_function (void) |
|
|
2638 { |
|
4238
|
2639 if (symtab_context.empty ()) |
|
3903
|
2640 panic_impossible (); |
|
|
2641 |
|
4238
|
2642 curr_sym_tab = symtab_context.top (); |
|
|
2643 symtab_context.pop (); |
|
2883
|
2644 |
|
|
2645 lexer_flags.defining_func = false; |
|
|
2646 lexer_flags.beginning_of_function = false; |
|
|
2647 lexer_flags.parsed_function_name = false; |
|
|
2648 lexer_flags.looking_at_return_list = false; |
|
|
2649 lexer_flags.looking_at_parameter_list = false; |
|
|
2650 } |
|
|
2651 |
|
2846
|
2652 // Make an index expression. |
|
|
2653 |
|
751
|
2654 static tree_index_expression * |
|
3929
|
2655 make_index_expression (tree_expression *expr, tree_argument_list *args, |
|
3933
|
2656 char type) |
|
751
|
2657 { |
|
|
2658 tree_index_expression *retval = 0; |
|
|
2659 |
|
2970
|
2660 int l = expr->line (); |
|
|
2661 int c = expr->column (); |
|
|
2662 |
|
|
2663 expr->mark_postfix_indexed (); |
|
|
2664 |
|
3933
|
2665 if (expr->is_index_expression ()) |
|
|
2666 { |
|
|
2667 tree_index_expression *tmp = static_cast<tree_index_expression *> (expr); |
|
|
2668 |
|
|
2669 tmp->append (args, type); |
|
|
2670 |
|
|
2671 retval = tmp; |
|
|
2672 } |
|
|
2673 else |
|
|
2674 retval = new tree_index_expression (expr, args, l, c, type); |
|
2970
|
2675 |
|
|
2676 return retval; |
|
|
2677 } |
|
|
2678 |
|
|
2679 // Make an indirect reference expression. |
|
|
2680 |
|
3930
|
2681 static tree_index_expression * |
|
3523
|
2682 make_indirect_ref (tree_expression *expr, const std::string& elt) |
|
2970
|
2683 { |
|
3930
|
2684 tree_index_expression *retval = 0; |
|
2970
|
2685 |
|
|
2686 int l = expr->line (); |
|
|
2687 int c = expr->column (); |
|
|
2688 |
|
3933
|
2689 if (expr->is_index_expression ()) |
|
|
2690 { |
|
|
2691 tree_index_expression *tmp = static_cast<tree_index_expression *> (expr); |
|
|
2692 |
|
|
2693 tmp->append (elt); |
|
|
2694 |
|
|
2695 retval = tmp; |
|
|
2696 } |
|
|
2697 else |
|
|
2698 retval = new tree_index_expression (expr, elt, l, c); |
|
2970
|
2699 |
|
|
2700 lexer_flags.looking_at_indirect_ref = false; |
|
751
|
2701 |
|
|
2702 return retval; |
|
|
2703 } |
|
1511
|
2704 |
|
4131
|
2705 // Make an indirect reference expression with dynamic field name. |
|
|
2706 |
|
|
2707 static tree_index_expression * |
|
|
2708 make_indirect_ref (tree_expression *expr, tree_expression *elt) |
|
|
2709 { |
|
|
2710 tree_index_expression *retval = 0; |
|
|
2711 |
|
|
2712 int l = expr->line (); |
|
|
2713 int c = expr->column (); |
|
|
2714 |
|
|
2715 if (expr->is_index_expression ()) |
|
|
2716 { |
|
|
2717 tree_index_expression *tmp = static_cast<tree_index_expression *> (expr); |
|
|
2718 |
|
|
2719 tmp->append (elt); |
|
|
2720 |
|
|
2721 retval = tmp; |
|
|
2722 } |
|
|
2723 else |
|
|
2724 retval = new tree_index_expression (expr, elt, l, c); |
|
|
2725 |
|
|
2726 lexer_flags.looking_at_indirect_ref = false; |
|
|
2727 |
|
|
2728 return retval; |
|
|
2729 } |
|
|
2730 |
|
2846
|
2731 // Make a declaration command. |
|
|
2732 |
|
|
2733 static tree_decl_command * |
|
|
2734 make_decl_command (int tok, token *tok_val, tree_decl_init_list *lst) |
|
|
2735 { |
|
|
2736 tree_decl_command *retval = 0; |
|
|
2737 |
|
|
2738 int l = tok_val->line (); |
|
|
2739 int c = tok_val->column (); |
|
|
2740 |
|
|
2741 switch (tok) |
|
|
2742 { |
|
|
2743 case GLOBAL: |
|
|
2744 retval = new tree_global_command (lst, l, c); |
|
|
2745 break; |
|
|
2746 |
|
|
2747 case STATIC: |
|
|
2748 if (lexer_flags.defining_func) |
|
|
2749 retval = new tree_static_command (lst, l, c); |
|
|
2750 else |
|
|
2751 { |
|
|
2752 if (reading_script_file) |
|
4844
|
2753 warning ("ignoring persistent declaration near line %d of file `%s'", |
|
2846
|
2754 l, curr_fcn_file_full_name.c_str ()); |
|
|
2755 else |
|
4844
|
2756 warning ("ignoring persistent declaration near line %d", l); |
|
2846
|
2757 } |
|
|
2758 break; |
|
|
2759 |
|
|
2760 default: |
|
|
2761 panic_impossible (); |
|
|
2762 break; |
|
|
2763 } |
|
|
2764 |
|
|
2765 return retval; |
|
|
2766 } |
|
|
2767 |
|
1623
|
2768 // Finish building a matrix list. |
|
|
2769 |
|
|
2770 static tree_expression * |
|
1829
|
2771 finish_matrix (tree_matrix *m) |
|
1623
|
2772 { |
|
3110
|
2773 tree_expression *retval = m; |
|
|
2774 |
|
|
2775 unwind_protect::begin_frame ("finish_matrix"); |
|
|
2776 |
|
|
2777 unwind_protect_int (error_state); |
|
4452
|
2778 unwind_protect_int (warning_state); |
|
3110
|
2779 |
|
3815
|
2780 unwind_protect_bool (discard_error_messages); |
|
4452
|
2781 unwind_protect_bool (discard_warning_messages); |
|
|
2782 |
|
3815
|
2783 discard_error_messages = true; |
|
4452
|
2784 discard_warning_messages = true; |
|
1623
|
2785 |
|
2533
|
2786 if (m->all_elements_are_constant ()) |
|
1829
|
2787 { |
|
2970
|
2788 octave_value tmp = m->rvalue (); |
|
1623
|
2789 |
|
3489
|
2790 if (! (error_state || warning_state)) |
|
2533
|
2791 { |
|
|
2792 tree_constant *tc_retval = new tree_constant (tmp); |
|
|
2793 |
|
4051
|
2794 OSSTREAM buf; |
|
2533
|
2795 |
|
|
2796 tree_print_code tpc (buf); |
|
|
2797 |
|
|
2798 m->accept (tpc); |
|
|
2799 |
|
4051
|
2800 buf << OSSTREAM_ENDS; |
|
|
2801 |
|
|
2802 tc_retval->stash_original_text (OSSTREAM_STR (buf)); |
|
|
2803 |
|
|
2804 OSSTREAM_FREEZE (buf); |
|
2533
|
2805 |
|
|
2806 delete m; |
|
|
2807 |
|
|
2808 retval = tc_retval; |
|
|
2809 } |
|
1623
|
2810 } |
|
3110
|
2811 |
|
|
2812 unwind_protect::run_frame ("finish_matrix"); |
|
1623
|
2813 |
|
|
2814 return retval; |
|
|
2815 } |
|
|
2816 |
|
3351
|
2817 // Finish building a cell list. |
|
|
2818 |
|
|
2819 static tree_expression * |
|
|
2820 finish_cell (tree_cell *c) |
|
|
2821 { |
|
|
2822 // For now, this doesn't do anything. |
|
|
2823 |
|
|
2824 return c; |
|
|
2825 } |
|
|
2826 |
|
1511
|
2827 static void |
|
|
2828 maybe_warn_missing_semi (tree_statement_list *t) |
|
|
2829 { |
|
2166
|
2830 if (lexer_flags.defining_func && Vwarn_missing_semicolon) |
|
1511
|
2831 { |
|
4219
|
2832 tree_statement *tmp = t->back(); |
|
1607
|
2833 |
|
1511
|
2834 if (tmp->is_expression ()) |
|
1607
|
2835 warning ("missing semicolon near line %d, column %d in file `%s'", |
|
1755
|
2836 tmp->line (), tmp->column (), |
|
|
2837 curr_fcn_file_full_name.c_str ()); |
|
1511
|
2838 } |
|
|
2839 } |
|
1994
|
2840 |
|
2525
|
2841 static void |
|
|
2842 set_stmt_print_flag (tree_statement_list *list, char sep, |
|
|
2843 bool warn_missing_semi) |
|
|
2844 { |
|
|
2845 switch (sep) |
|
|
2846 { |
|
|
2847 case ';': |
|
|
2848 { |
|
4219
|
2849 tree_statement *tmp = list->back (); |
|
2525
|
2850 tmp->set_print_flag (0); |
|
|
2851 } |
|
|
2852 break; |
|
|
2853 |
|
|
2854 case 0: |
|
|
2855 case ',': |
|
|
2856 case '\n': |
|
|
2857 if (warn_missing_semi) |
|
|
2858 maybe_warn_missing_semi (list); |
|
|
2859 break; |
|
|
2860 |
|
|
2861 default: |
|
|
2862 warning ("unrecognized separator type!"); |
|
|
2863 break; |
|
|
2864 } |
|
|
2865 } |
|
|
2866 |
|
3021
|
2867 void |
|
|
2868 parse_and_execute (FILE *f) |
|
|
2869 { |
|
|
2870 unwind_protect::begin_frame ("parse_and_execute"); |
|
3880
|
2871 |
|
5309
|
2872 unwind_protect_ptr (global_command); |
|
|
2873 |
|
3021
|
2874 YY_BUFFER_STATE old_buf = current_buffer (); |
|
|
2875 YY_BUFFER_STATE new_buf = create_buffer (f); |
|
|
2876 |
|
|
2877 unwind_protect::add (restore_input_buffer, old_buf); |
|
|
2878 unwind_protect::add (delete_input_buffer, new_buf); |
|
|
2879 |
|
|
2880 switch_to_buffer (new_buf); |
|
|
2881 |
|
|
2882 unwind_protect_bool (line_editing); |
|
3880
|
2883 unwind_protect_bool (get_input_from_eval_string); |
|
3883
|
2884 unwind_protect_bool (parser_end_of_input); |
|
3021
|
2885 |
|
|
2886 line_editing = false; |
|
3880
|
2887 get_input_from_eval_string = false; |
|
3883
|
2888 parser_end_of_input = false; |
|
3021
|
2889 |
|
|
2890 unwind_protect_ptr (curr_sym_tab); |
|
|
2891 |
|
|
2892 int retval; |
|
|
2893 do |
|
|
2894 { |
|
|
2895 reset_parser (); |
|
|
2896 |
|
|
2897 retval = yyparse (); |
|
|
2898 |
|
3883
|
2899 if (retval == 0) |
|
|
2900 { |
|
|
2901 if (global_command) |
|
3021
|
2902 { |
|
3883
|
2903 global_command->eval (); |
|
|
2904 |
|
|
2905 delete global_command; |
|
|
2906 |
|
|
2907 global_command = 0; |
|
|
2908 |
|
4171
|
2909 OCTAVE_QUIT; |
|
|
2910 |
|
4207
|
2911 bool quit = (tree_return_command::returning |
|
|
2912 || tree_break_command::breaking); |
|
|
2913 |
|
|
2914 if (tree_return_command::returning) |
|
|
2915 tree_return_command::returning = 0; |
|
|
2916 |
|
|
2917 if (tree_break_command::breaking) |
|
|
2918 tree_break_command::breaking--; |
|
3883
|
2919 |
|
|
2920 if (error_state) |
|
|
2921 { |
|
|
2922 error ("near line %d of file `%s'", input_line_number, |
|
|
2923 curr_fcn_file_full_name.c_str ()); |
|
|
2924 |
|
|
2925 break; |
|
|
2926 } |
|
|
2927 |
|
|
2928 if (quit) |
|
|
2929 break; |
|
3021
|
2930 } |
|
3883
|
2931 else if (parser_end_of_input) |
|
3021
|
2932 break; |
|
3883
|
2933 } |
|
3021
|
2934 } |
|
|
2935 while (retval == 0); |
|
|
2936 |
|
|
2937 unwind_protect::run_frame ("parse_and_execute"); |
|
|
2938 } |
|
|
2939 |
|
|
2940 static void |
|
|
2941 safe_fclose (void *f) |
|
|
2942 { |
|
3765
|
2943 // XXX FIXME XXX -- comments at the end of an input file are |
|
|
2944 // discarded (otherwise, they would be appended to the next |
|
|
2945 // statement, possibly from the command line or another file, which |
|
|
2946 // can be quite confusing). |
|
|
2947 |
|
5308
|
2948 octave_comment_list *tc = octave_comment_buffer::get_comment (); |
|
|
2949 |
|
|
2950 delete tc; |
|
3765
|
2951 |
|
3021
|
2952 if (f) |
|
|
2953 fclose (static_cast<FILE *> (f)); |
|
|
2954 } |
|
|
2955 |
|
|
2956 void |
|
3523
|
2957 parse_and_execute (const std::string& s, bool verbose, const char *warn_for) |
|
3021
|
2958 { |
|
|
2959 unwind_protect::begin_frame ("parse_and_execute_2"); |
|
|
2960 |
|
|
2961 unwind_protect_bool (reading_script_file); |
|
|
2962 unwind_protect_str (curr_fcn_file_full_name); |
|
|
2963 |
|
|
2964 reading_script_file = true; |
|
|
2965 curr_fcn_file_full_name = s; |
|
|
2966 |
|
|
2967 FILE *f = get_input_from_file (s, 0); |
|
|
2968 |
|
|
2969 if (f) |
|
|
2970 { |
|
|
2971 unwind_protect::add (safe_fclose, f); |
|
|
2972 |
|
|
2973 unwind_protect_int (input_line_number); |
|
|
2974 unwind_protect_int (current_input_column); |
|
|
2975 |
|
|
2976 input_line_number = 0; |
|
|
2977 current_input_column = 1; |
|
|
2978 |
|
|
2979 if (verbose) |
|
|
2980 { |
|
3531
|
2981 std::cout << "reading commands from " << s << " ... "; |
|
3021
|
2982 reading_startup_message_printed = true; |
|
3531
|
2983 std::cout.flush (); |
|
3021
|
2984 } |
|
|
2985 |
|
|
2986 parse_and_execute (f); |
|
|
2987 |
|
|
2988 if (verbose) |
|
3538
|
2989 std::cout << "done." << std::endl; |
|
3021
|
2990 } |
|
|
2991 else if (warn_for) |
|
|
2992 error ("%s: unable to open file `%s'", warn_for, s.c_str ()); |
|
|
2993 |
|
|
2994 unwind_protect::run_frame ("parse_and_execute_2"); |
|
|
2995 } |
|
|
2996 |
|
|
2997 static bool |
|
5175
|
2998 looks_like_copyright (const std::string& s) |
|
3021
|
2999 { |
|
5175
|
3000 // Perhaps someday we will want to do more here, so leave this as a |
|
|
3001 // separate function. |
|
|
3002 |
|
5180
|
3003 return (s.substr (0, 9) == "Copyright"); |
|
3021
|
3004 } |
|
|
3005 |
|
4540
|
3006 static int |
|
|
3007 text_getc (FILE *f) |
|
|
3008 { |
|
|
3009 int c = getc (f); |
|
|
3010 |
|
|
3011 // Convert CRLF into just LF. |
|
|
3012 |
|
|
3013 if (c == '\r') |
|
|
3014 { |
|
|
3015 c = getc (f); |
|
|
3016 |
|
|
3017 if (c != '\n') |
|
|
3018 { |
|
|
3019 ungetc (c, f); |
|
|
3020 c = '\r'; |
|
|
3021 } |
|
|
3022 } |
|
|
3023 |
|
|
3024 return c; |
|
|
3025 } |
|
|
3026 |
|
3021
|
3027 // Eat whitespace and comments from FFILE, returning the text of the |
|
|
3028 // comments read if it doesn't look like a copyright notice. If |
|
|
3029 // IN_PARTS, consider each block of comments separately; otherwise, |
|
|
3030 // grab them all at once. If UPDATE_POS is TRUE, line and column |
|
3665
|
3031 // number information is updated. If SAVE_COPYRIGHT is TRUE, then |
|
|
3032 // comments that are recognized as a copyright notice are saved in the |
|
|
3033 // comment buffer. |
|
3021
|
3034 |
|
|
3035 // XXX FIXME XXX -- grab_help_text() in lex.l duplicates some of this |
|
|
3036 // code! |
|
|
3037 |
|
3536
|
3038 static std::string |
|
3665
|
3039 gobble_leading_white_space (FILE *ffile, bool in_parts, |
|
|
3040 bool update_pos, bool save_copyright) |
|
3021
|
3041 { |
|
3523
|
3042 std::string help_txt; |
|
3021
|
3043 |
|
3802
|
3044 // TRUE means we have already seen the first block of comments. |
|
3021
|
3045 bool first_comments_seen = false; |
|
3802
|
3046 |
|
|
3047 // TRUE means we are at the beginning of a comment block. |
|
3021
|
3048 bool begin_comment = false; |
|
3802
|
3049 |
|
|
3050 // TRUE means we have already cached the help text. |
|
3021
|
3051 bool have_help_text = false; |
|
3802
|
3052 |
|
|
3053 // TRUE means we are currently reading a comment block. |
|
3021
|
3054 bool in_comment = false; |
|
3802
|
3055 |
|
|
3056 // TRUE means we should discard the first space from the input |
|
|
3057 // (used to strip leading spaces from the help text). |
|
3427
|
3058 bool discard_space = true; |
|
3802
|
3059 |
|
3021
|
3060 int c; |
|
|
3061 |
|
4540
|
3062 while ((c = text_getc (ffile)) != EOF) |
|
3021
|
3063 { |
|
|
3064 if (update_pos) |
|
|
3065 current_input_column++; |
|
|
3066 |
|
|
3067 if (begin_comment) |
|
|
3068 { |
|
|
3069 if (c == '%' || c == '#') |
|
|
3070 continue; |
|
3427
|
3071 else if (discard_space && c == ' ') |
|
|
3072 { |
|
|
3073 discard_space = false; |
|
|
3074 continue; |
|
|
3075 } |
|
3021
|
3076 else |
|
|
3077 begin_comment = false; |
|
|
3078 } |
|
|
3079 |
|
|
3080 if (in_comment) |
|
|
3081 { |
|
|
3082 if (! have_help_text) |
|
|
3083 { |
|
|
3084 first_comments_seen = true; |
|
|
3085 help_txt += (char) c; |
|
|
3086 } |
|
|
3087 |
|
|
3088 if (c == '\n') |
|
|
3089 { |
|
|
3090 if (update_pos) |
|
|
3091 { |
|
|
3092 input_line_number++; |
|
|
3093 current_input_column = 0; |
|
|
3094 } |
|
3427
|
3095 |
|
3021
|
3096 in_comment = false; |
|
3427
|
3097 discard_space = true; |
|
3021
|
3098 |
|
|
3099 if (in_parts) |
|
|
3100 { |
|
4540
|
3101 if ((c = text_getc (ffile)) != EOF) |
|
3021
|
3102 { |
|
|
3103 if (update_pos) |
|
|
3104 current_input_column--; |
|
|
3105 ungetc (c, ffile); |
|
|
3106 if (c == '\n') |
|
|
3107 break; |
|
|
3108 } |
|
|
3109 else |
|
|
3110 break; |
|
|
3111 } |
|
|
3112 } |
|
|
3113 } |
|
|
3114 else |
|
|
3115 { |
|
|
3116 switch (c) |
|
|
3117 { |
|
|
3118 case ' ': |
|
|
3119 case '\t': |
|
|
3120 if (first_comments_seen) |
|
|
3121 have_help_text = true; |
|
|
3122 break; |
|
|
3123 |
|
3802
|
3124 case '%': |
|
|
3125 case '#': |
|
|
3126 begin_comment = true; |
|
|
3127 in_comment = true; |
|
|
3128 break; |
|
|
3129 |
|
3021
|
3130 case '\n': |
|
|
3131 if (first_comments_seen) |
|
|
3132 have_help_text = true; |
|
|
3133 if (update_pos) |
|
|
3134 { |
|
|
3135 input_line_number++; |
|
|
3136 current_input_column = 0; |
|
|
3137 } |
|
|
3138 continue; |
|
|
3139 |
|
|
3140 default: |
|
|
3141 if (update_pos) |
|
|
3142 current_input_column--; |
|
|
3143 ungetc (c, ffile); |
|
|
3144 goto done; |
|
|
3145 } |
|
|
3146 } |
|
|
3147 } |
|
|
3148 |
|
|
3149 done: |
|
|
3150 |
|
|
3151 if (! help_txt.empty ()) |
|
|
3152 { |
|
5175
|
3153 if (looks_like_copyright (help_txt)) |
|
3665
|
3154 { |
|
|
3155 if (save_copyright) |
|
|
3156 octave_comment_buffer::append (help_txt); |
|
|
3157 |
|
|
3158 help_txt.resize (0); |
|
|
3159 } |
|
3021
|
3160 |
|
|
3161 if (in_parts && help_txt.empty ()) |
|
3665
|
3162 help_txt = gobble_leading_white_space (ffile, in_parts, |
|
|
3163 update_pos, false); |
|
3021
|
3164 } |
|
|
3165 |
|
|
3166 return help_txt; |
|
|
3167 } |
|
|
3168 |
|
3536
|
3169 std::string |
|
3523
|
3170 get_help_from_file (const std::string& path) |
|
3021
|
3171 { |
|
3523
|
3172 std::string retval; |
|
3021
|
3173 |
|
|
3174 if (! path.empty ()) |
|
|
3175 { |
|
|
3176 FILE *fptr = fopen (path.c_str (), "r"); |
|
|
3177 |
|
|
3178 if (fptr) |
|
|
3179 { |
|
|
3180 unwind_protect::add (safe_fclose, (void *) fptr); |
|
|
3181 |
|
3665
|
3182 retval = gobble_leading_white_space (fptr, true, true, false); |
|
3021
|
3183 |
|
|
3184 unwind_protect::run (); |
|
|
3185 } |
|
|
3186 } |
|
|
3187 |
|
|
3188 return retval; |
|
|
3189 } |
|
|
3190 |
|
|
3191 static int |
|
|
3192 is_function_file (FILE *ffile) |
|
|
3193 { |
|
|
3194 int status = 0; |
|
|
3195 |
|
|
3196 long pos = ftell (ffile); |
|
|
3197 |
|
3665
|
3198 gobble_leading_white_space (ffile, false, false, false); |
|
3021
|
3199 |
|
|
3200 char buf [10]; |
|
|
3201 fgets (buf, 10, ffile); |
|
|
3202 int len = strlen (buf); |
|
|
3203 if (len > 8 && strncmp (buf, "function", 8) == 0 |
|
|
3204 && ! (isalnum (buf[8]) || buf[8] == '_')) |
|
|
3205 status = 1; |
|
|
3206 |
|
|
3207 fseek (ffile, pos, SEEK_SET); |
|
|
3208 |
|
|
3209 return status; |
|
|
3210 } |
|
|
3211 |
|
|
3212 static void |
|
|
3213 restore_command_history (void *) |
|
|
3214 { |
|
|
3215 command_history::ignore_entries (! Vsaving_history); |
|
|
3216 } |
|
|
3217 |
|
|
3218 static void |
|
|
3219 restore_input_stream (void *f) |
|
|
3220 { |
|
|
3221 command_editor::set_input_stream (static_cast<FILE *> (f)); |
|
|
3222 } |
|
|
3223 |
|
3180
|
3224 static void |
|
|
3225 clear_current_script_file_name (void *) |
|
|
3226 { |
|
|
3227 bind_builtin_variable ("current_script_file_name", octave_value ()); |
|
|
3228 } |
|
|
3229 |
|
3021
|
3230 static bool |
|
3523
|
3231 parse_fcn_file (const std::string& ff, bool exec_script, bool force_script = false) |
|
3021
|
3232 { |
|
|
3233 unwind_protect::begin_frame ("parse_fcn_file"); |
|
|
3234 |
|
|
3235 int script_file_executed = false; |
|
|
3236 |
|
|
3237 // Open function file and parse. |
|
|
3238 |
|
|
3239 bool old_reading_fcn_file_state = reading_fcn_file; |
|
|
3240 |
|
|
3241 FILE *in_stream = command_editor::get_input_stream (); |
|
|
3242 |
|
|
3243 unwind_protect::add (restore_input_stream, in_stream); |
|
|
3244 |
|
|
3245 unwind_protect_ptr (ff_instream); |
|
|
3246 |
|
|
3247 unwind_protect_int (input_line_number); |
|
|
3248 unwind_protect_int (current_input_column); |
|
4238
|
3249 unwind_protect_int (end_tokens_expected); |
|
3021
|
3250 unwind_protect_bool (reading_fcn_file); |
|
|
3251 unwind_protect_bool (line_editing); |
|
4238
|
3252 unwind_protect_str (parent_function_name); |
|
3021
|
3253 |
|
|
3254 input_line_number = 0; |
|
|
3255 current_input_column = 1; |
|
4238
|
3256 end_tokens_expected = 0; |
|
3021
|
3257 reading_fcn_file = true; |
|
|
3258 line_editing = false; |
|
4238
|
3259 parent_function_name = ""; |
|
3021
|
3260 |
|
|
3261 FILE *ffile = get_input_from_file (ff, 0); |
|
|
3262 |
|
|
3263 unwind_protect::add (safe_fclose, ffile); |
|
|
3264 |
|
|
3265 if (ffile) |
|
|
3266 { |
|
|
3267 // Check to see if this file defines a function or is just a |
|
|
3268 // list of commands. |
|
|
3269 |
|
3165
|
3270 if (! force_script && is_function_file (ffile)) |
|
3021
|
3271 { |
|
|
3272 // XXX FIXME XXX -- we shouldn't need both the |
|
|
3273 // command_history object and the |
|
|
3274 // Vsaving_history variable... |
|
|
3275 command_history::ignore_entries (); |
|
|
3276 |
|
|
3277 unwind_protect::add (restore_command_history, 0); |
|
|
3278 |
|
|
3279 unwind_protect_int (Vecho_executing_commands); |
|
|
3280 unwind_protect_bool (Vsaving_history); |
|
|
3281 unwind_protect_bool (reading_fcn_file); |
|
3877
|
3282 unwind_protect_bool (get_input_from_eval_string); |
|
3883
|
3283 unwind_protect_bool (parser_end_of_input); |
|
3021
|
3284 |
|
|
3285 Vecho_executing_commands = ECHO_OFF; |
|
|
3286 Vsaving_history = false; |
|
|
3287 reading_fcn_file = true; |
|
3877
|
3288 get_input_from_eval_string = false; |
|
3883
|
3289 parser_end_of_input = false; |
|
3021
|
3290 |
|
|
3291 YY_BUFFER_STATE old_buf = current_buffer (); |
|
|
3292 YY_BUFFER_STATE new_buf = create_buffer (ffile); |
|
|
3293 |
|
|
3294 unwind_protect::add (restore_input_buffer, (void *) old_buf); |
|
|
3295 unwind_protect::add (delete_input_buffer, (void *) new_buf); |
|
|
3296 |
|
|
3297 switch_to_buffer (new_buf); |
|
|
3298 |
|
|
3299 unwind_protect_ptr (curr_sym_tab); |
|
|
3300 |
|
|
3301 reset_parser (); |
|
|
3302 |
|
4426
|
3303 std::string txt |
|
|
3304 = gobble_leading_white_space (ffile, true, true, true); |
|
|
3305 |
|
|
3306 help_buf.push (txt); |
|
|
3307 |
|
|
3308 octave_comment_buffer::append (txt); |
|
3021
|
3309 |
|
|
3310 // XXX FIXME XXX -- this should not be necessary. |
|
3665
|
3311 gobble_leading_white_space (ffile, false, true, false); |
|
3021
|
3312 |
|
|
3313 int status = yyparse (); |
|
|
3314 |
|
|
3315 if (status != 0) |
|
|
3316 { |
|
|
3317 error ("parse error while reading function file %s", |
|
|
3318 ff.c_str ()); |
|
4009
|
3319 fbi_sym_tab->clear (curr_fcn_file_name); |
|
3021
|
3320 } |
|
|
3321 } |
|
|
3322 else if (exec_script) |
|
|
3323 { |
|
|
3324 // The value of `reading_fcn_file' will be restored to the |
|
|
3325 // proper value when we unwind from this frame. |
|
|
3326 reading_fcn_file = old_reading_fcn_file_state; |
|
|
3327 |
|
|
3328 // XXX FIXME XXX -- we shouldn't need both the |
|
|
3329 // command_history object and the |
|
|
3330 // Vsaving_history variable... |
|
|
3331 command_history::ignore_entries (); |
|
|
3332 |
|
|
3333 unwind_protect::add (restore_command_history, 0); |
|
|
3334 |
|
|
3335 unwind_protect_bool (Vsaving_history); |
|
|
3336 unwind_protect_bool (reading_script_file); |
|
|
3337 |
|
|
3338 Vsaving_history = false; |
|
|
3339 reading_script_file = true; |
|
|
3340 |
|
3180
|
3341 unwind_protect::add (clear_current_script_file_name, 0); |
|
|
3342 |
|
|
3343 bind_builtin_variable ("current_script_file_name", ff); |
|
|
3344 |
|
3021
|
3345 parse_and_execute (ffile); |
|
|
3346 |
|
|
3347 script_file_executed = true; |
|
|
3348 } |
|
|
3349 } |
|
3880
|
3350 else |
|
|
3351 error ("no such file, `%s'", ff.c_str ()); |
|
3021
|
3352 |
|
|
3353 unwind_protect::run_frame ("parse_fcn_file"); |
|
|
3354 |
|
|
3355 return script_file_executed; |
|
|
3356 } |
|
|
3357 |
|
|
3358 bool |
|
5312
|
3359 load_fcn_from_file (const std::string& nm, bool exec_script) |
|
3021
|
3360 { |
|
|
3361 bool script_file_executed = false; |
|
|
3362 |
|
4244
|
3363 string_vector names (2); |
|
4243
|
3364 |
|
|
3365 names[0] = nm + ".oct"; |
|
|
3366 names[1] = nm + ".m"; |
|
|
3367 |
|
|
3368 std::string file |
|
|
3369 = octave_env::make_absolute (Vload_path_dir_path.find_first_of (names), |
|
|
3370 octave_env::getcwd ()); |
|
|
3371 |
|
|
3372 int len = file.length (); |
|
|
3373 |
|
4244
|
3374 if (len > 4 && file.substr (len-4, len-1) == ".oct") |
|
3021
|
3375 { |
|
4243
|
3376 if (octave_dynamic_loader::load (nm, file)) |
|
|
3377 force_link_to_function (nm); |
|
3021
|
3378 } |
|
4244
|
3379 else if (len > 2) |
|
3021
|
3380 { |
|
|
3381 // These are needed by yyparse. |
|
|
3382 |
|
|
3383 unwind_protect::begin_frame ("load_fcn_from_file"); |
|
|
3384 |
|
|
3385 unwind_protect_str (curr_fcn_file_name); |
|
|
3386 unwind_protect_str (curr_fcn_file_full_name); |
|
|
3387 |
|
|
3388 curr_fcn_file_name = nm; |
|
4243
|
3389 curr_fcn_file_full_name = file; |
|
|
3390 |
|
4244
|
3391 script_file_executed = parse_fcn_file (file, exec_script); |
|
3021
|
3392 |
|
|
3393 if (! (error_state || script_file_executed)) |
|
|
3394 force_link_to_function (nm); |
|
|
3395 |
|
|
3396 unwind_protect::run_frame ("load_fcn_from_file"); |
|
|
3397 } |
|
|
3398 |
|
|
3399 return script_file_executed; |
|
|
3400 } |
|
|
3401 |
|
5312
|
3402 bool |
|
|
3403 load_fcn_from_file (symbol_record *sym_rec, bool exec_script) |
|
|
3404 { |
|
|
3405 return load_fcn_from_file (sym_rec->name (), exec_script); |
|
|
3406 } |
|
|
3407 |
|
4486
|
3408 void |
|
|
3409 source_file (const std::string file_name) |
|
|
3410 { |
|
|
3411 std::string file_full_name = file_ops::tilde_expand (file_name); |
|
|
3412 |
|
|
3413 unwind_protect::begin_frame ("source_file"); |
|
|
3414 |
|
|
3415 unwind_protect_str (curr_fcn_file_name); |
|
|
3416 unwind_protect_str (curr_fcn_file_full_name); |
|
|
3417 |
|
|
3418 curr_fcn_file_name = file_name; |
|
|
3419 curr_fcn_file_full_name = file_full_name; |
|
|
3420 |
|
|
3421 parse_fcn_file (file_full_name, true, true); |
|
|
3422 |
|
|
3423 if (error_state) |
|
|
3424 error ("source: error sourcing file `%s'", |
|
|
3425 file_full_name.c_str ()); |
|
|
3426 |
|
|
3427 unwind_protect::run_frame ("source_file"); |
|
|
3428 } |
|
|
3429 |
|
3021
|
3430 DEFUN (source, args, , |
|
3371
|
3431 "-*- texinfo -*-\n\ |
|
|
3432 @deftypefn {Built-in Function} {} source (@var{file})\n\ |
|
|
3433 Parse and execute the contents of @var{file}. This is equivalent to\n\ |
|
|
3434 executing commands from a script file, but without requiring the file to\n\ |
|
|
3435 be named @file{@var{file}.m}.\n\ |
|
|
3436 @end deftypefn") |
|
3021
|
3437 { |
|
|
3438 octave_value_list retval; |
|
|
3439 |
|
|
3440 int nargin = args.length (); |
|
|
3441 |
|
|
3442 if (nargin == 1) |
|
|
3443 { |
|
3523
|
3444 std::string file_name = args(0).string_value (); |
|
3021
|
3445 |
|
|
3446 if (! error_state) |
|
4486
|
3447 source_file (file_name); |
|
3021
|
3448 else |
|
|
3449 error ("source: expecting file name as argument"); |
|
|
3450 } |
|
|
3451 else |
|
|
3452 print_usage ("source"); |
|
|
3453 |
|
|
3454 return retval; |
|
|
3455 } |
|
|
3456 |
|
3726
|
3457 // Evaluate an Octave function (built-in or interpreted) and return |
|
3844
|
3458 // the list of result values. NAME is the name of the function to |
|
|
3459 // call. ARGS are the arguments to the function. NARGOUT is the |
|
|
3460 // number of output arguments expected. |
|
3726
|
3461 |
|
3021
|
3462 octave_value_list |
|
3523
|
3463 feval (const std::string& name, const octave_value_list& args, int nargout) |
|
3156
|
3464 { |
|
|
3465 octave_value_list retval; |
|
|
3466 |
|
|
3467 octave_function *fcn = is_valid_function (name, "feval", 1); |
|
|
3468 |
|
|
3469 if (fcn) |
|
3544
|
3470 retval = fcn->do_multi_index_op (nargout, args); |
|
3156
|
3471 |
|
|
3472 return retval; |
|
|
3473 } |
|
|
3474 |
|
4342
|
3475 octave_value_list |
|
|
3476 feval (octave_function *fcn, const octave_value_list& args, int nargout) |
|
|
3477 { |
|
|
3478 octave_value_list retval; |
|
|
3479 |
|
|
3480 if (fcn) |
|
|
3481 retval = fcn->do_multi_index_op (nargout, args); |
|
|
3482 |
|
|
3483 return retval; |
|
|
3484 } |
|
|
3485 |
|
|
3486 static octave_value_list |
|
|
3487 get_feval_args (const octave_value_list& args) |
|
|
3488 { |
|
|
3489 int tmp_nargin = args.length () - 1; |
|
|
3490 |
|
|
3491 octave_value_list retval (tmp_nargin, octave_value ()); |
|
|
3492 |
|
|
3493 for (int i = 0; i < tmp_nargin; i++) |
|
|
3494 retval(i) = args(i+1); |
|
|
3495 |
|
|
3496 string_vector arg_names = args.name_tags (); |
|
|
3497 |
|
|
3498 if (! arg_names.empty ()) |
|
|
3499 { |
|
|
3500 // tmp_nargin and arg_names.length () - 1 may differ if |
|
|
3501 // we are passed all_va_args. |
|
|
3502 |
|
|
3503 int n = arg_names.length () - 1; |
|
|
3504 |
|
|
3505 int len = n > tmp_nargin ? tmp_nargin : n; |
|
|
3506 |
|
|
3507 string_vector tmp_arg_names (len); |
|
|
3508 |
|
|
3509 for (int i = 0; i < len; i++) |
|
|
3510 tmp_arg_names(i) = arg_names(i+1); |
|
|
3511 |
|
|
3512 retval.stash_name_tags (tmp_arg_names); |
|
|
3513 } |
|
|
3514 |
|
|
3515 return retval; |
|
|
3516 } |
|
|
3517 |
|
|
3518 |
|
3726
|
3519 // Evaluate an Octave function (built-in or interpreted) and return |
|
|
3520 // the list of result values. The first element of ARGS should be a |
|
|
3521 // string containing the name of the function to call, then the rest |
|
|
3522 // are the actual arguments to the function. NARGOUT is the number of |
|
|
3523 // output arguments expected. |
|
|
3524 |
|
3156
|
3525 octave_value_list |
|
3021
|
3526 feval (const octave_value_list& args, int nargout) |
|
|
3527 { |
|
|
3528 octave_value_list retval; |
|
|
3529 |
|
4342
|
3530 int nargin = args.length (); |
|
|
3531 |
|
|
3532 if (nargin > 0) |
|
3021
|
3533 { |
|
4342
|
3534 octave_value f_arg = args(0); |
|
|
3535 |
|
|
3536 if (f_arg.is_string ()) |
|
|
3537 { |
|
|
3538 std::string name = f_arg.string_value (); |
|
|
3539 |
|
|
3540 if (! error_state) |
|
3156
|
3541 { |
|
4342
|
3542 octave_value_list tmp_args = get_feval_args (args); |
|
|
3543 |
|
|
3544 retval = feval (name, tmp_args, nargout); |
|
3156
|
3545 } |
|
4342
|
3546 } |
|
|
3547 else |
|
|
3548 { |
|
|
3549 octave_function *fcn = f_arg.function_value (); |
|
|
3550 |
|
|
3551 if (fcn) |
|
|
3552 { |
|
|
3553 octave_value_list tmp_args = get_feval_args (args); |
|
|
3554 |
|
|
3555 retval = feval (fcn, tmp_args, nargout); |
|
|
3556 } |
|
3021
|
3557 } |
|
|
3558 } |
|
|
3559 |
|
|
3560 return retval; |
|
|
3561 } |
|
|
3562 |
|
|
3563 DEFUN (feval, args, nargout, |
|
3371
|
3564 "-*- texinfo -*-\n\ |
|
|
3565 @deftypefn {Built-in Function} {} feval (@var{name}, @dots{})\n\ |
|
|
3566 Evaluate the function named @var{name}. Any arguments after the first\n\ |
|
|
3567 are passed on to the named function. For example,\n\ |
|
|
3568 \n\ |
|
|
3569 @example\n\ |
|
|
3570 feval (\"acos\", -1)\n\ |
|
|
3571 @result{} 3.1416\n\ |
|
|
3572 @end example\n\ |
|
3021
|
3573 \n\ |
|
3371
|
3574 @noindent\n\ |
|
|
3575 calls the function @code{acos} with the argument @samp{-1}.\n\ |
|
|
3576 \n\ |
|
|
3577 The function @code{feval} is necessary in order to be able to write\n\ |
|
|
3578 functions that call user-supplied functions, because Octave does not\n\ |
|
|
3579 have a way to declare a pointer to a function (like C) or to declare a\n\ |
|
|
3580 special kind of variable that can be used to hold the name of a function\n\ |
|
|
3581 (like @code{EXTERNAL} in Fortran). Instead, you must refer to functions\n\ |
|
|
3582 by name, and use @code{feval} to call them.\n\ |
|
|
3583 @end deftypefn") |
|
3021
|
3584 { |
|
|
3585 octave_value_list retval; |
|
|
3586 |
|
|
3587 int nargin = args.length (); |
|
|
3588 |
|
|
3589 if (nargin > 0) |
|
|
3590 retval = feval (args, nargout); |
|
|
3591 else |
|
|
3592 print_usage ("feval"); |
|
|
3593 |
|
|
3594 return retval; |
|
|
3595 } |
|
|
3596 |
|
3099
|
3597 octave_value_list |
|
3523
|
3598 eval_string (const std::string& s, bool silent, int& parse_status, int nargout) |
|
3021
|
3599 { |
|
3877
|
3600 octave_value_list retval; |
|
|
3601 |
|
3021
|
3602 unwind_protect::begin_frame ("eval_string"); |
|
|
3603 |
|
|
3604 unwind_protect_bool (get_input_from_eval_string); |
|
3877
|
3605 unwind_protect_bool (input_from_eval_string_pending); |
|
3883
|
3606 unwind_protect_bool (parser_end_of_input); |
|
5189
|
3607 unwind_protect_bool (line_editing); |
|
3021
|
3608 unwind_protect_str (current_eval_string); |
|
|
3609 |
|
|
3610 get_input_from_eval_string = true; |
|
3877
|
3611 input_from_eval_string_pending = true; |
|
3883
|
3612 parser_end_of_input = false; |
|
5189
|
3613 line_editing = false; |
|
|
3614 |
|
3021
|
3615 current_eval_string = s; |
|
|
3616 |
|
3877
|
3617 unwind_protect_ptr (global_command); |
|
|
3618 |
|
3021
|
3619 YY_BUFFER_STATE old_buf = current_buffer (); |
|
|
3620 YY_BUFFER_STATE new_buf = create_buffer (0); |
|
|
3621 |
|
|
3622 unwind_protect::add (restore_input_buffer, old_buf); |
|
|
3623 unwind_protect::add (delete_input_buffer, new_buf); |
|
|
3624 |
|
|
3625 switch_to_buffer (new_buf); |
|
|
3626 |
|
|
3627 unwind_protect_ptr (curr_sym_tab); |
|
|
3628 |
|
3877
|
3629 do |
|
|
3630 { |
|
4318
|
3631 reset_parser (); |
|
|
3632 |
|
3877
|
3633 parse_status = yyparse (); |
|
|
3634 |
|
|
3635 tree_statement_list *command = global_command; |
|
|
3636 |
|
3883
|
3637 if (parse_status == 0) |
|
3877
|
3638 { |
|
3883
|
3639 if (command) |
|
|
3640 { |
|
|
3641 retval = command->eval (silent, nargout); |
|
|
3642 |
|
|
3643 delete command; |
|
|
3644 |
|
|
3645 command = 0; |
|
|
3646 |
|
|
3647 if (error_state |
|
4207
|
3648 || tree_return_command::returning |
|
|
3649 || tree_break_command::breaking |
|
|
3650 || tree_continue_command::continuing) |
|
3883
|
3651 break; |
|
|
3652 } |
|
|
3653 else if (parser_end_of_input) |
|
3877
|
3654 break; |
|
3883
|
3655 } |
|
3877
|
3656 } |
|
|
3657 while (parse_status == 0); |
|
3021
|
3658 |
|
|
3659 unwind_protect::run_frame ("eval_string"); |
|
|
3660 |
|
|
3661 return retval; |
|
|
3662 } |
|
|
3663 |
|
|
3664 octave_value |
|
3523
|
3665 eval_string (const std::string& s, bool silent, int& parse_status) |
|
3021
|
3666 { |
|
|
3667 octave_value retval; |
|
|
3668 |
|
|
3669 octave_value_list tmp = eval_string (s, silent, parse_status, 1); |
|
|
3670 |
|
|
3671 if (! tmp.empty ()) |
|
|
3672 retval = tmp(0); |
|
|
3673 |
|
|
3674 return retval; |
|
|
3675 } |
|
|
3676 |
|
|
3677 static octave_value_list |
|
|
3678 eval_string (const octave_value& arg, bool silent, int& parse_status, |
|
|
3679 int nargout) |
|
|
3680 { |
|
3523
|
3681 std::string s = arg.string_value (); |
|
3021
|
3682 |
|
|
3683 if (error_state) |
|
|
3684 { |
|
3523
|
3685 error ("eval: expecting std::string argument"); |
|
4233
|
3686 return octave_value (-1); |
|
3021
|
3687 } |
|
|
3688 |
|
|
3689 return eval_string (s, silent, parse_status, nargout); |
|
|
3690 } |
|
|
3691 |
|
|
3692 DEFUN (eval, args, nargout, |
|
3371
|
3693 "-*- texinfo -*-\n\ |
|
|
3694 @deftypefn {Built-in Function} {} eval (@var{try}, @var{catch})\n\ |
|
|
3695 Parse the string @var{try} and evaluate it as if it were an Octave\n\ |
|
4463
|
3696 program. If that fails, evaluate the string @var{catch}.\n\ |
|
|
3697 The string @var{try} is evaluated in the current context,\n\ |
|
|
3698 so any results remain available after @code{eval} returns.\n\ |
|
3371
|
3699 @end deftypefn") |
|
3021
|
3700 { |
|
|
3701 octave_value_list retval; |
|
|
3702 |
|
|
3703 int nargin = args.length (); |
|
|
3704 |
|
|
3705 if (nargin > 0) |
|
|
3706 { |
|
|
3707 unwind_protect::begin_frame ("Feval"); |
|
|
3708 |
|
|
3709 if (nargin > 1) |
|
|
3710 { |
|
4699
|
3711 unwind_protect_int (buffer_error_messages); |
|
|
3712 buffer_error_messages++; |
|
3021
|
3713 } |
|
|
3714 |
|
|
3715 int parse_status = 0; |
|
|
3716 |
|
4463
|
3717 octave_value_list tmp = eval_string (args(0), nargout > 0, |
|
|
3718 parse_status, nargout); |
|
|
3719 |
|
|
3720 if (nargout > 0) |
|
|
3721 retval = tmp; |
|
3021
|
3722 |
|
|
3723 if (nargin > 1 && (parse_status != 0 || error_state)) |
|
|
3724 { |
|
|
3725 error_state = 0; |
|
|
3726 |
|
|
3727 // Set up for letting the user print any messages from |
|
|
3728 // errors that occurred in the first part of this eval(). |
|
|
3729 |
|
4699
|
3730 buffer_error_messages--; |
|
3021
|
3731 |
|
|
3732 eval_string (args(1), 0, parse_status, nargout); |
|
|
3733 |
|
|
3734 retval = octave_value_list (); |
|
|
3735 } |
|
|
3736 |
|
|
3737 unwind_protect::run_frame ("Feval"); |
|
|
3738 } |
|
|
3739 else |
|
|
3740 print_usage ("eval"); |
|
|
3741 |
|
|
3742 return retval; |
|
|
3743 } |
|
|
3744 |
|
4661
|
3745 DEFUN (assignin, args, , |
|
4297
|
3746 "-*- texinfo -*-\n\ |
|
|
3747 @deftypefn {Built-in Function} {} assignin (@var{context}, @var{varname}, @var{value})\n\ |
|
|
3748 Assign @var{value} to @var{varname} in context @var{context}, which\n\ |
|
|
3749 may be either @code{\"base\"} or @code{\"caller\"}.\n\ |
|
|
3750 @end deftypefn") |
|
|
3751 { |
|
|
3752 octave_value_list retval; |
|
|
3753 |
|
|
3754 int nargin = args.length (); |
|
|
3755 |
|
|
3756 if (nargin == 3) |
|
|
3757 { |
|
|
3758 std::string context = args(0).string_value (); |
|
|
3759 |
|
|
3760 if (! error_state) |
|
|
3761 { |
|
|
3762 unwind_protect::begin_frame ("Fassignin"); |
|
|
3763 |
|
|
3764 unwind_protect_ptr (curr_sym_tab); |
|
|
3765 |
|
|
3766 if (context == "caller") |
|
|
3767 curr_sym_tab = curr_caller_sym_tab; |
|
|
3768 else if (context == "base") |
|
|
3769 curr_sym_tab = top_level_sym_tab; |
|
|
3770 else |
|
|
3771 error ("assignin: context must be \"caller\" or \"base\""); |
|
|
3772 |
|
|
3773 if (! error_state) |
|
|
3774 { |
|
|
3775 std::string nm = args(1).string_value (); |
|
|
3776 |
|
|
3777 if (! error_state) |
|
|
3778 { |
|
|
3779 if (valid_identifier (nm)) |
|
|
3780 { |
|
|
3781 symbol_record *sr = curr_sym_tab->lookup (nm, true); |
|
|
3782 |
|
|
3783 if (sr) |
|
|
3784 { |
|
|
3785 tree_identifier *id = new tree_identifier (sr); |
|
|
3786 tree_constant *rhs = new tree_constant (args(2)); |
|
|
3787 |
|
|
3788 tree_simple_assignment tsa (id, rhs); |
|
|
3789 |
|
|
3790 tsa.rvalue (); |
|
|
3791 } |
|
|
3792 } |
|
|
3793 else |
|
|
3794 error ("assignin: invalid variable name"); |
|
|
3795 } |
|
|
3796 else |
|
|
3797 error ("assignin: expecting variable name as second argument"); |
|
|
3798 } |
|
|
3799 |
|
|
3800 unwind_protect::run_frame ("Fassignin"); |
|
|
3801 } |
|
|
3802 else |
|
|
3803 error ("assignin: expecting string as first argument"); |
|
|
3804 } |
|
|
3805 else |
|
|
3806 print_usage ("assignin"); |
|
|
3807 |
|
|
3808 return retval; |
|
|
3809 } |
|
|
3810 |
|
4245
|
3811 DEFUN (evalin, args, nargout, |
|
|
3812 "-*- texinfo -*-\n\ |
|
|
3813 @deftypefn {Built-in Function} {} evalin (@var{context}, @var{try}, @var{catch})\n\ |
|
|
3814 Like @code{eval}, except that the expressions are evaluated in the\n\ |
|
|
3815 context @var{context}, which may be either @code{\"caller\"} or\n\ |
|
4246
|
3816 @code{\"base\"}.\n\ |
|
4245
|
3817 @end deftypefn") |
|
|
3818 { |
|
|
3819 octave_value_list retval; |
|
|
3820 |
|
|
3821 int nargin = args.length (); |
|
|
3822 |
|
|
3823 if (nargin > 1) |
|
|
3824 { |
|
|
3825 std::string context = args(0).string_value (); |
|
|
3826 |
|
|
3827 if (! error_state) |
|
|
3828 { |
|
|
3829 unwind_protect::begin_frame ("Fevalin"); |
|
|
3830 |
|
|
3831 unwind_protect_ptr (curr_sym_tab); |
|
|
3832 |
|
|
3833 if (context == "caller") |
|
|
3834 curr_sym_tab = curr_caller_sym_tab; |
|
|
3835 else if (context == "base") |
|
|
3836 curr_sym_tab = top_level_sym_tab; |
|
|
3837 else |
|
|
3838 error ("evalin: context must be \"caller\" or \"base\""); |
|
|
3839 |
|
4297
|
3840 if (! error_state) |
|
4245
|
3841 { |
|
4297
|
3842 if (nargin > 2) |
|
|
3843 { |
|
4699
|
3844 unwind_protect_int (buffer_error_messages); |
|
|
3845 buffer_error_messages++; |
|
4297
|
3846 } |
|
|
3847 |
|
|
3848 int parse_status = 0; |
|
|
3849 |
|
4463
|
3850 octave_value_list tmp = eval_string (args(1), nargout > 0, |
|
|
3851 parse_status, nargout); |
|
|
3852 |
|
|
3853 if (nargout > 0) |
|
|
3854 retval = tmp; |
|
4297
|
3855 |
|
|
3856 if (nargin > 2 && (parse_status != 0 || error_state)) |
|
|
3857 { |
|
|
3858 error_state = 0; |
|
|
3859 |
|
|
3860 // Set up for letting the user print any messages from |
|
|
3861 // errors that occurred in the first part of this eval(). |
|
|
3862 |
|
4699
|
3863 buffer_error_messages--; |
|
4297
|
3864 |
|
|
3865 eval_string (args(2), 0, parse_status, nargout); |
|
|
3866 |
|
|
3867 retval = octave_value_list (); |
|
|
3868 } |
|
4245
|
3869 } |
|
|
3870 |
|
|
3871 unwind_protect::run_frame ("Fevalin"); |
|
|
3872 } |
|
|
3873 else |
|
|
3874 error ("evalin: expecting string as first argument"); |
|
|
3875 } |
|
|
3876 else |
|
|
3877 print_usage ("evalin"); |
|
|
3878 |
|
|
3879 return retval; |
|
|
3880 } |
|
|
3881 |
|
3021
|
3882 static int |
|
2166
|
3883 warn_assign_as_truth_value (void) |
|
|
3884 { |
|
|
3885 Vwarn_assign_as_truth_value |
|
|
3886 = check_preference ("warn_assign_as_truth_value"); |
|
|
3887 |
|
|
3888 return 0; |
|
|
3889 } |
|
|
3890 |
|
|
3891 static int |
|
5161
|
3892 warn_associativity_change (void) |
|
|
3893 { |
|
|
3894 Vwarn_associativity_change = check_preference ("warn_associativity_change"); |
|
|
3895 |
|
|
3896 return 0; |
|
|
3897 } |
|
|
3898 |
|
|
3899 static int |
|
2166
|
3900 warn_function_name_clash (void) |
|
|
3901 { |
|
|
3902 Vwarn_function_name_clash = check_preference ("warn_function_name_clash"); |
|
|
3903 |
|
|
3904 return 0; |
|
|
3905 } |
|
|
3906 |
|
|
3907 static int |
|
3162
|
3908 warn_future_time_stamp (void) |
|
|
3909 { |
|
|
3910 Vwarn_future_time_stamp = check_preference ("warn_future_time_stamp"); |
|
|
3911 |
|
|
3912 return 0; |
|
|
3913 } |
|
|
3914 |
|
|
3915 static int |
|
2166
|
3916 warn_missing_semicolon (void) |
|
|
3917 { |
|
|
3918 Vwarn_missing_semicolon = check_preference ("warn_missing_semicolon"); |
|
|
3919 |
|
|
3920 return 0; |
|
|
3921 } |
|
|
3922 |
|
2764
|
3923 static int |
|
4023
|
3924 warn_precedence_change (void) |
|
|
3925 { |
|
|
3926 Vwarn_precedence_change = check_preference ("warn_precedence_change"); |
|
|
3927 |
|
|
3928 return 0; |
|
|
3929 } |
|
|
3930 |
|
|
3931 static int |
|
2764
|
3932 warn_variable_switch_label (void) |
|
|
3933 { |
|
|
3934 Vwarn_variable_switch_label |
|
|
3935 = check_preference ("warn_variable_switch_label"); |
|
|
3936 |
|
|
3937 return 0; |
|
|
3938 } |
|
|
3939 |
|
2166
|
3940 void |
|
|
3941 symbols_of_parse (void) |
|
|
3942 { |
|
4233
|
3943 DEFVAR (warn_assign_as_truth_value, true, warn_assign_as_truth_value, |
|
3366
|
3944 "-*- texinfo -*-\n\ |
|
|
3945 @defvr {Built-in Variable} warn_assign_as_truth_value\n\ |
|
|
3946 If the value of @code{warn_assign_as_truth_value} is nonzero, a\n\ |
|
|
3947 warning is issued for statements like\n\ |
|
|
3948 \n\ |
|
|
3949 @example\n\ |
|
|
3950 if (s = t)\n\ |
|
|
3951 ...\n\ |
|
|
3952 @end example\n\ |
|
|
3953 \n\ |
|
|
3954 @noindent\n\ |
|
|
3955 since such statements are not common, and it is likely that the intent\n\ |
|
|
3956 was to write\n\ |
|
|
3957 \n\ |
|
|
3958 @example\n\ |
|
|
3959 if (s == t)\n\ |
|
|
3960 ...\n\ |
|
|
3961 @end example\n\ |
|
|
3962 \n\ |
|
|
3963 @noindent\n\ |
|
|
3964 instead.\n\ |
|
|
3965 \n\ |
|
|
3966 There are times when it is useful to write code that contains\n\ |
|
|
3967 assignments within the condition of a @code{while} or @code{if}\n\ |
|
|
3968 statement. For example, statements like\n\ |
|
|
3969 \n\ |
|
|
3970 @example\n\ |
|
|
3971 while (c = getc())\n\ |
|
|
3972 ...\n\ |
|
|
3973 @end example\n\ |
|
|
3974 \n\ |
|
|
3975 @noindent\n\ |
|
|
3976 are common in C programming.\n\ |
|
|
3977 \n\ |
|
|
3978 It is possible to avoid all warnings about such statements by setting\n\ |
|
|
3979 @code{warn_assign_as_truth_value} to 0, but that may also\n\ |
|
|
3980 let real errors like\n\ |
|
|
3981 \n\ |
|
|
3982 @example\n\ |
|
|
3983 if (x = 1) # intended to test (x == 1)!\n\ |
|
|
3984 ...\n\ |
|
|
3985 @end example\n\ |
|
|
3986 \n\ |
|
|
3987 @noindent\n\ |
|
|
3988 slip by.\n\ |
|
|
3989 \n\ |
|
|
3990 In such cases, it is possible suppress errors for specific statements by\n\ |
|
|
3991 writing them with an extra set of parentheses. For example, writing the\n\ |
|
|
3992 previous example as\n\ |
|
|
3993 \n\ |
|
|
3994 @example\n\ |
|
|
3995 while ((c = getc()))\n\ |
|
|
3996 ...\n\ |
|
|
3997 @end example\n\ |
|
|
3998 \n\ |
|
|
3999 @noindent\n\ |
|
|
4000 will prevent the warning from being printed for this statement, while\n\ |
|
|
4001 allowing Octave to warn about other assignments used in conditional\n\ |
|
|
4002 contexts.\n\ |
|
|
4003 \n\ |
|
|
4004 The default value of @code{warn_assign_as_truth_value} is 1.\n\ |
|
|
4005 @end defvr"); |
|
2166
|
4006 |
|
5161
|
4007 DEFVAR (warn_associativity_change, true, warn_associativity_change, |
|
|
4008 "-*- texinfo -*-\n\ |
|
|
4009 @defvr {Built-in Variable} warn_associativity_change\n\ |
|
|
4010 If the value of this variable is nonzero, Octave will warn about\n\ |
|
|
4011 possible changes in the meaning of some code due to changes in\n\ |
|
|
4012 associativity for some operators. Associativity changes have typically\n\ |
|
|
4013 been made for Matlab compatibility. The default value is 1.\n\ |
|
|
4014 @end defvr"); |
|
|
4015 |
|
4233
|
4016 DEFVAR (warn_function_name_clash, true, warn_function_name_clash, |
|
3371
|
4017 "-*- texinfo -*-\n\ |
|
|
4018 @defvr {Built-in Variable} warn_function_name_clash\n\ |
|
|
4019 If the value of @code{warn_function_name_clash} is nonzero, a warning is\n\ |
|
|
4020 issued when Octave finds that the name of a function defined in a\n\ |
|
|
4021 function file differs from the name of the file. (If the names\n\ |
|
|
4022 disagree, the name declared inside the file is ignored.) If the value\n\ |
|
|
4023 is 0, the warning is omitted. The default value is 1.\n\ |
|
|
4024 @end defvr"); |
|
2166
|
4025 |
|
4233
|
4026 DEFVAR (warn_future_time_stamp, true, warn_future_time_stamp, |
|
3446
|
4027 "-*- texinfo -*-\n\ |
|
|
4028 @defvr {Built-in Variable} warn_future_time_stamp\n\ |
|
|
4029 If the value of this variable is nonzero, Octave will print a warning\n\ |
|
|
4030 if it finds a function file with a time stamp that is in the future.\n\ |
|
|
4031 @end defvr"); |
|
3162
|
4032 |
|
4233
|
4033 DEFVAR (warn_missing_semicolon, false, warn_missing_semicolon, |
|
3371
|
4034 "-*- texinfo -*-\n\ |
|
|
4035 @defvr {Built-in Variable} warn_missing_semicolon\n\ |
|
|
4036 If the value of this variable is nonzero, Octave will warn when\n\ |
|
|
4037 statements in function definitions don't end in semicolons. The default\n\ |
|
|
4038 value is 0.\n\ |
|
|
4039 @end defvr"); |
|
2764
|
4040 |
|
4233
|
4041 DEFVAR (warn_precedence_change, true, warn_precedence_change, |
|
4023
|
4042 "-*- texinfo -*-\n\ |
|
|
4043 @defvr {Built-in Variable} warn_precedence_change\n\ |
|
|
4044 If the value of this variable is nonzero, Octave will warn about\n\ |
|
|
4045 possible changes in the meaning of some code due to changes in\n\ |
|
|
4046 precedence for some operators. Precedence changes have typically\n\ |
|
|
4047 been made for Matlab compatibility. The default value is 1.\n\ |
|
|
4048 @end defvr"); |
|
|
4049 |
|
4233
|
4050 DEFVAR (warn_variable_switch_label, false, warn_variable_switch_label, |
|
3366
|
4051 "-*- texinfo -*-\n\ |
|
|
4052 @defvr {Built-in Variable} warn_variable_switch_label\n\ |
|
|
4053 If the value of this variable is nonzero, Octave will print a warning if\n\ |
|
|
4054 a switch label is not a constant or constant expression\n\ |
|
|
4055 @end defvr"); |
|
3347
|
4056 |
|
2166
|
4057 } |
|
|
4058 |
|
1994
|
4059 /* |
|
|
4060 ;;; Local Variables: *** |
|
|
4061 ;;; mode: text *** |
|
|
4062 ;;; End: *** |
|
|
4063 */ |
