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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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 // Parser for Octave. |
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24 |
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767
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25 // C decarations. |
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26 |
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27 %{ |
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28 #define YYDEBUG 1 |
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29 |
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240
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30 #ifdef HAVE_CONFIG_H |
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31 #include <config.h> |
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240
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32 #endif |
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33 |
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34 #include <cassert> |
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35 #include <cstdio> |
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36 |
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37 #ifdef YYBYACC |
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38 #include <cstdlib> |
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39 #endif |
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40 |
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41 #include "Cell.h" |
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42 #include "Matrix.h" |
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3021
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43 #include "cmd-edit.h" |
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44 #include "cmd-hist.h" |
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45 #include "file-ops.h" |
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46 #include "file-stat.h" |
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47 #include "lo-sstream.h" |
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3712
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48 #include "oct-time.h" |
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49 #include "quit.h" |
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50 |
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51 #include "comment-list.h" |
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2166
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52 #include "defun.h" |
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53 #include "dynamic-ld.h" |
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54 #include "error.h" |
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55 #include "input.h" |
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56 #include "lex.h" |
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57 #include "oct-hist.h" |
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58 #include "ov-usr-fcn.h" |
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59 #include "toplev.h" |
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60 #include "pager.h" |
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61 #include "parse.h" |
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2987
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62 #include "pt-all.h" |
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63 #include "symtab.h" |
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64 #include "token.h" |
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65 #include "unwind-prot.h" |
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66 #include "utils.h" |
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67 #include "variables.h" |
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68 |
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69 // TRUE means we print |
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70 static bool Vdefault_eval_print_flag = true; |
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71 |
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72 // If TRUE, generate a warning for the assignment in things like |
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73 // |
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74 // octave> if (a = 2 < n) |
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75 // |
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76 // but not |
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77 // |
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78 // octave> if ((a = 2) < n) |
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79 // |
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80 static bool Vwarn_assign_as_truth_value; |
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81 |
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82 // If TRUE, generate a warning for variable swich labels. |
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83 static bool Vwarn_variable_switch_label; |
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84 |
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85 // If TRUE, generate warning if declared function name disagrees with |
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86 // the name of the file in which it is defined. |
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87 static bool Vwarn_function_name_clash; |
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88 |
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89 // TRUE means warn about function files that have time stamps in the future. |
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90 bool Vwarn_future_time_stamp; |
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91 |
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92 // If TRUE, generate warning if a statement in a function is not |
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93 // terminated with a semicolon. Useful for checking functions that |
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94 // should only produce output using explicit printing statements. |
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95 static bool Vwarn_missing_semicolon; |
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96 |
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97 // If TRUE, generate warning about the meaning of code changing due to |
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98 // changes in precedence levels for various ops (typically for Matlab |
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99 // compatibility). |
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100 static bool Vwarn_precedence_change; |
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101 |
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102 // Temporary symbol table pointer used to cope with bogus function syntax. |
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103 symbol_table *tmp_local_sym_tab = 0; |
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104 |
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105 // The current input line number. |
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106 int input_line_number = 0; |
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107 |
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108 // The column of the current token. |
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143
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109 int current_input_column = 1; |
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110 |
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338
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111 // Buffer for help text snagged from function files. |
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112 std::string help_buf; |
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113 |
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114 // Buffer for comments appearing before a function statement. |
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115 static std::string fcn_comment_header; |
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116 |
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117 // TRUE means we are using readline. |
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118 // (--no-line-editing) |
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119 bool line_editing = true; |
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120 |
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121 // TRUE means we printed messages about reading startup files. |
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122 bool reading_startup_message_printed = false; |
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123 |
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124 // TRUE means input is coming from startup file. |
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125 bool input_from_startup_file = false; |
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126 |
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127 // TRUE means that input is coming from a file that was named on |
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128 // the command line. |
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129 bool input_from_command_line_file = true; |
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130 |
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131 // TRUE means that we are in the process of evaluating a function |
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132 // body. The parser might be called in that case if we are looking at |
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133 // an eval() statement. |
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134 bool evaluating_function_body = false; |
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135 |
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136 // Keep track of symbol table information when parsing functions. |
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137 static symbol_table *symtab_context = 0; |
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138 |
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496
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139 // Forward declarations for some functions defined at the bottom of |
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140 // the file. |
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141 |
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142 // Generic error messages. |
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143 static void |
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144 yyerror (const char *s); |
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145 |
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578
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146 // Error mesages for mismatched end tokens. |
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147 static void |
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148 end_error (const char *type, token::end_tok_type ettype, int l, int c); |
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149 |
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578
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150 // Check to see that end tokens are properly matched. |
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151 static bool |
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152 end_token_ok (token *tok, token::end_tok_type expected); |
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153 |
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154 // Maybe print a warning if an assignment expression is used as the |
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155 // test in a logical expression. |
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156 static void |
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157 maybe_warn_assign_as_truth_value (tree_expression *expr); |
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158 |
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159 // Maybe print a warning about switch labels that aren't constants. |
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160 static void |
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161 maybe_warn_variable_switch_label (tree_expression *expr); |
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162 |
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163 // Create a plot command. |
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164 static tree_plot_command * |
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165 make_plot_command (token *tok, plot_limits *range, subplot_list *list); |
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166 |
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167 // Finish building a range. |
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168 static tree_expression * |
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169 finish_colon_expression (tree_colon_expression *e); |
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170 |
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171 // Build a constant. |
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172 static tree_constant * |
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173 make_constant (int op, token *tok_val); |
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174 |
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175 // Build a binary expression. |
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176 static tree_expression * |
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177 make_binary_op (int op, tree_expression *op1, token *tok_val, |
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178 tree_expression *op2); |
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179 |
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180 // Build a boolean expression. |
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181 static tree_expression * |
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182 make_boolean_op (int op, tree_expression *op1, token *tok_val, |
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183 tree_expression *op2); |
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184 |
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185 // Build a prefix expression. |
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186 static tree_expression * |
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187 make_prefix_op (int op, tree_expression *op1, token *tok_val); |
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188 |
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189 // Build a postfix expression. |
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190 static tree_expression * |
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191 make_postfix_op (int op, tree_expression *op1, token *tok_val); |
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192 |
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193 // Build an unwind-protect command. |
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194 static tree_command * |
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195 make_unwind_command (token *unwind_tok, tree_statement_list *body, |
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196 tree_statement_list *cleanup, token *end_tok, |
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197 octave_comment_list *lc, octave_comment_list *mc); |
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198 |
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199 // Build a try-catch command. |
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200 static tree_command * |
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201 make_try_command (token *try_tok, tree_statement_list *body, |
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202 tree_statement_list *cleanup, token *end_tok, |
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203 octave_comment_list *lc, octave_comment_list *mc); |
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204 |
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205 // Build a while command. |
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206 static tree_command * |
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207 make_while_command (token *while_tok, tree_expression *expr, |
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208 tree_statement_list *body, token *end_tok, |
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209 octave_comment_list *lc); |
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210 |
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211 // Build a do-until command. |
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212 static tree_command * |
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213 make_do_until_command (token *do_tok, tree_statement_list *body, |
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214 tree_expression *expr, octave_comment_list *lc); |
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215 |
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216 // Build a for command. |
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217 static tree_command * |
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218 make_for_command (token *for_tok, tree_argument_list *lhs, |
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219 tree_expression *expr, tree_statement_list *body, |
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220 token *end_tok, octave_comment_list *lc); |
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221 |
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222 // Build a break command. |
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223 static tree_command * |
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224 make_break_command (token *break_tok); |
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225 |
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226 // Build a continue command. |
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227 static tree_command * |
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228 make_continue_command (token *continue_tok); |
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229 |
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230 // Build a return command. |
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231 static tree_command * |
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232 make_return_command (token *return_tok); |
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233 |
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234 // Start an if command. |
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235 static tree_if_command_list * |
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236 start_if_command (tree_expression *expr, tree_statement_list *list); |
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237 |
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238 // Finish an if command. |
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239 static tree_if_command * |
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240 finish_if_command (token *if_tok, tree_if_command_list *list, |
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241 token *end_tok, octave_comment_list *lc); |
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242 |
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243 // Build an elseif clause. |
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244 static tree_if_clause * |
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245 make_elseif_clause (tree_expression *expr, tree_statement_list *list, |
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246 octave_comment_list *lc); |
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247 |
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248 // Finish a switch command. |
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249 static tree_switch_command * |
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250 finish_switch_command (token *switch_tok, tree_expression *expr, |
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251 tree_switch_case_list *list, token *end_tok, |
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252 octave_comment_list *lc); |
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253 |
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254 // Build a switch case. |
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255 static tree_switch_case * |
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256 make_switch_case (tree_expression *expr, tree_statement_list *list, |
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257 octave_comment_list *lc); |
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258 |
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259 // Build an assignment to a variable. |
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260 static tree_expression * |
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261 make_assign_op (int op, tree_argument_list *lhs, token *eq_tok, |
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262 tree_expression *rhs); |
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263 |
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264 // Begin defining a function. |
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265 static octave_user_function * |
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266 start_function (tree_parameter_list *param_list, tree_statement_list *body); |
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267 |
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268 // Do most of the work for defining a function. |
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269 static octave_user_function * |
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270 frob_function (tree_identifier *id, octave_user_function *fcn); |
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271 |
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272 // Finish defining a function. |
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273 static octave_user_function * |
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274 finish_function (tree_identifier *id, octave_user_function *fcn, |
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275 octave_comment_list *lc); |
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276 |
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277 // Finish defining a function a different way. |
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278 static octave_user_function * |
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279 finish_function (tree_parameter_list *ret_list, |
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280 octave_user_function *fcn, octave_comment_list *lc); |
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281 |
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282 // Reset state after parsing function. |
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283 static void |
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284 recover_from_parsing_function (void); |
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285 |
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751
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286 // Make an index expression. |
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287 static tree_index_expression * |
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288 make_index_expression (tree_expression *expr, |
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289 tree_argument_list *args, char type); |
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290 |
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291 // Make an indirect reference expression. |
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292 static tree_index_expression * |
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293 make_indirect_ref (tree_expression *expr, const std::string&); |
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294 |
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295 // Make an indirect reference expression with dynamic field name. |
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296 static tree_index_expression * |
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297 make_indirect_ref (tree_expression *expr, tree_expression *field); |
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298 |
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299 // Make a declaration command. |
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300 static tree_decl_command * |
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301 make_decl_command (int tok, token *tok_val, tree_decl_init_list *lst); |
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302 |
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303 // Finish building a matrix list. |
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304 static tree_expression * |
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305 finish_matrix (tree_matrix *m); |
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306 |
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307 // Finish building a cell list. |
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308 static tree_expression * |
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309 finish_cell (tree_cell *c); |
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310 |
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311 // Maybe print a warning. Duh. |
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312 static void |
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313 maybe_warn_missing_semi (tree_statement_list *); |
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314 |
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315 // Set the print flag for a statement based on the separator type. |
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316 static void |
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317 set_stmt_print_flag (tree_statement_list *, char, bool); |
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318 |
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319 #define ABORT_PARSE \ |
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320 do \ |
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321 { \ |
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322 global_command = 0; \ |
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323 yyerrok; \ |
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324 if (symtab_context) \ |
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325 { \ |
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326 curr_sym_tab = symtab_context; \ |
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327 symtab_context = 0; \ |
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328 } \ |
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329 if (interactive || forced_interactive) \ |
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330 YYACCEPT; \ |
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331 else \ |
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332 YYABORT; \ |
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333 } \ |
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334 while (0) |
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335 |
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336 %} |
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337 |
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666
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338 // Bison declarations. |
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339 |
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340 %union |
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341 { |
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342 // The type of the basic tokens returned by the lexer. |
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343 token *tok_val; |
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344 |
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345 // Comment strings that we need to deal with mid-rule. |
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346 octave_comment_list *comment_type; |
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347 |
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348 // Types for the nonterminals we generate. |
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349 char sep_type; |
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350 tree *tree_type; |
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351 tree_matrix *tree_matrix_type; |
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352 tree_cell *tree_cell_type; |
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353 tree_expression *tree_expression_type; |
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354 tree_constant *tree_constant_type; |
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355 tree_identifier *tree_identifier_type; |
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356 tree_index_expression *tree_index_expression_type; |
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357 tree_colon_expression *tree_colon_expression_type; |
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358 tree_argument_list *tree_argument_list_type; |
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359 tree_parameter_list *tree_parameter_list_type; |
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360 tree_command *tree_command_type; |
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361 tree_if_command *tree_if_command_type; |
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578
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362 tree_if_clause *tree_if_clause_type; |
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363 tree_if_command_list *tree_if_command_list_type; |
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364 tree_switch_command *tree_switch_command_type; |
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365 tree_switch_case *tree_switch_case_type; |
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366 tree_switch_case_list *tree_switch_case_list_type; |
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367 tree_decl_elt *tree_decl_elt_type; |
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368 tree_decl_init_list *tree_decl_init_list_type; |
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369 tree_decl_command *tree_decl_command_type; |
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370 tree_statement *tree_statement_type; |
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371 tree_statement_list *tree_statement_list_type; |
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372 tree_plot_command *tree_plot_command_type; |
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578
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373 subplot *subplot_type; |
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374 subplot_list *subplot_list_type; |
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375 plot_limits *plot_limits_type; |
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376 plot_range *plot_range_type; |
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377 subplot_using *subplot_using_type; |
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378 subplot_style *subplot_style_type; |
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379 subplot_axes *subplot_axes_type; |
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380 octave_user_function *octave_user_function_type; |
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1
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381 } |
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382 |
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143
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383 // Tokens with line and column information. |
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384 %token <tok_val> '=' ':' '-' '+' '*' '/' |
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385 %token <tok_val> ADD_EQ SUB_EQ MUL_EQ DIV_EQ LEFTDIV_EQ POW_EQ |
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386 %token <tok_val> EMUL_EQ EDIV_EQ ELEFTDIV_EQ EPOW_EQ AND_EQ OR_EQ |
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2899
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387 %token <tok_val> LSHIFT_EQ RSHIFT_EQ LSHIFT RSHIFT |
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428
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388 %token <tok_val> EXPR_AND_AND EXPR_OR_OR |
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143
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389 %token <tok_val> EXPR_AND EXPR_OR EXPR_NOT |
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390 %token <tok_val> EXPR_LT EXPR_LE EXPR_EQ EXPR_NE EXPR_GE EXPR_GT |
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1276
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391 %token <tok_val> LEFTDIV EMUL EDIV ELEFTDIV EPLUS EMINUS |
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392 %token <tok_val> QUOTE TRANSPOSE |
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143
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393 %token <tok_val> PLUS_PLUS MINUS_MINUS POW EPOW |
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394 %token <tok_val> NUM IMAG_NUM |
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395 %token <tok_val> STRUCT_ELT |
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396 %token <tok_val> NAME |
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143
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397 %token <tok_val> END |
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398 %token <tok_val> PLOT |
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4064
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399 %token <tok_val> STRING STYLE AXES_TAG |
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3484
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400 %token <tok_val> FOR WHILE DO UNTIL |
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1491
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401 %token <tok_val> IF ELSEIF ELSE |
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2764
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402 %token <tok_val> SWITCH CASE OTHERWISE |
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1491
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403 %token <tok_val> BREAK CONTINUE FUNC_RET |
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924
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404 %token <tok_val> UNWIND CLEANUP |
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1489
|
405 %token <tok_val> TRY CATCH |
|
2846
|
406 %token <tok_val> GLOBAL STATIC |
|
1
|
407 |
|
143
|
408 // Other tokens. |
|
2970
|
409 %token END_OF_INPUT LEXICAL_ERROR |
|
3973
|
410 %token FCN VARARGIN VARARGOUT ALL_VA_ARGS |
|
3165
|
411 %token USING TITLE WITH AXES COLON OPEN_BRACE CLOSE_BRACE CLEAR |
|
1
|
412 |
|
143
|
413 // Nonterminals we construct. |
|
3665
|
414 %type <comment_type> stash_comment function_beg |
|
2525
|
415 %type <sep_type> sep_no_nl opt_sep_no_nl sep opt_sep |
|
578
|
416 %type <tree_type> input |
|
2960
|
417 %type <tree_constant_type> constant magic_colon |
|
3351
|
418 %type <tree_matrix_type> matrix_rows matrix_rows1 |
|
|
419 %type <tree_cell_type> cell_rows cell_rows1 |
|
|
420 %type <tree_expression_type> title matrix cell |
|
2970
|
421 %type <tree_expression_type> primary_expr postfix_expr prefix_expr binary_expr |
|
|
422 %type <tree_expression_type> simple_expr colon_expr assign_expr expression |
|
1
|
423 %type <tree_identifier_type> identifier |
|
2891
|
424 %type <octave_user_function_type> function1 function2 function3 |
|
2970
|
425 %type <tree_index_expression_type> word_list_cmd |
|
|
426 %type <tree_colon_expression_type> colon_expr1 |
|
3351
|
427 %type <tree_argument_list_type> arg_list word_list assign_lhs |
|
|
428 %type <tree_argument_list_type> cell_or_matrix_row |
|
723
|
429 %type <tree_parameter_list_type> param_list param_list1 |
|
|
430 %type <tree_parameter_list_type> return_list return_list1 |
|
2970
|
431 %type <tree_command_type> command select_command loop_command |
|
|
432 %type <tree_command_type> jump_command except_command function |
|
578
|
433 %type <tree_if_command_type> if_command |
|
|
434 %type <tree_if_clause_type> elseif_clause else_clause |
|
|
435 %type <tree_if_command_list_type> if_cmd_list1 if_cmd_list |
|
2764
|
436 %type <tree_switch_command_type> switch_command |
|
|
437 %type <tree_switch_case_type> switch_case default_case |
|
|
438 %type <tree_switch_case_list_type> case_list1 case_list |
|
2846
|
439 %type <tree_decl_elt_type> decl2 |
|
|
440 %type <tree_decl_init_list_type> decl1 |
|
|
441 %type <tree_decl_command_type> declaration |
|
578
|
442 %type <tree_statement_type> statement |
|
627
|
443 %type <tree_statement_list_type> simple_list simple_list1 list list1 |
|
2891
|
444 %type <tree_statement_list_type> opt_list input1 function4 |
|
1
|
445 %type <tree_plot_command_type> plot_command |
|
578
|
446 %type <subplot_type> plot_command2 plot_options |
|
|
447 %type <subplot_list_type> plot_command1 |
|
|
448 %type <plot_limits_type> ranges |
|
|
449 %type <plot_range_type> ranges1 |
|
|
450 %type <subplot_using_type> using using1 |
|
|
451 %type <subplot_style_type> style |
|
3165
|
452 %type <subplot_axes_type> axes |
|
1
|
453 |
|
143
|
454 // Precedence and associativity. |
|
1
|
455 %left ';' ',' '\n' |
|
4018
|
456 %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
|
457 %left EXPR_OR_OR |
|
|
458 %left EXPR_AND_AND |
|
|
459 %left EXPR_OR |
|
|
460 %left EXPR_AND |
|
1
|
461 %left EXPR_LT EXPR_LE EXPR_EQ EXPR_NE EXPR_GE EXPR_GT |
|
2899
|
462 %left LSHIFT RSHIFT |
|
1
|
463 %left ':' |
|
1276
|
464 %left '-' '+' EPLUS EMINUS |
|
1
|
465 %left '*' '/' LEFTDIV EMUL EDIV ELEFTDIV |
|
|
466 %left QUOTE TRANSPOSE |
|
|
467 %left UNARY PLUS_PLUS MINUS_MINUS EXPR_NOT |
|
|
468 %right POW EPOW |
|
3351
|
469 %left '(' '.' '{' |
|
1
|
470 |
|
143
|
471 // Where to start. |
|
1
|
472 %start input |
|
|
473 |
|
|
474 %% |
|
|
475 |
|
2970
|
476 // ============================== |
|
|
477 // Statements and statement lists |
|
|
478 // ============================== |
|
|
479 |
|
627
|
480 input : input1 |
|
1
|
481 { |
|
627
|
482 global_command = $1; |
|
1
|
483 promptflag = 1; |
|
|
484 YYACCEPT; |
|
|
485 } |
|
627
|
486 | simple_list parse_error |
|
1091
|
487 { ABORT_PARSE; } |
|
627
|
488 | parse_error |
|
1091
|
489 { ABORT_PARSE; } |
|
627
|
490 ; |
|
|
491 |
|
|
492 input1 : '\n' |
|
|
493 { $$ = 0; } |
|
3883
|
494 | END_OF_INPUT |
|
|
495 { |
|
|
496 parser_end_of_input = 1; |
|
|
497 $$ = 0; |
|
|
498 } |
|
327
|
499 | simple_list |
|
627
|
500 { $$ = $1; } |
|
1
|
501 | simple_list '\n' |
|
627
|
502 { $$ = $1; } |
|
1
|
503 | simple_list END_OF_INPUT |
|
627
|
504 { $$ = $1; } |
|
|
505 ; |
|
|
506 |
|
2525
|
507 simple_list : simple_list1 opt_sep_no_nl |
|
1
|
508 { |
|
2525
|
509 set_stmt_print_flag ($1, $2, false); |
|
1511
|
510 $$ = $1; |
|
1
|
511 } |
|
|
512 ; |
|
|
513 |
|
578
|
514 simple_list1 : statement |
|
|
515 { $$ = new tree_statement_list ($1); } |
|
2525
|
516 | simple_list1 sep_no_nl statement |
|
1
|
517 { |
|
2525
|
518 set_stmt_print_flag ($1, $2, false); |
|
578
|
519 $1->append ($3); |
|
1511
|
520 $$ = $1; |
|
1
|
521 } |
|
|
522 ; |
|
|
523 |
|
|
524 opt_list : // empty |
|
578
|
525 { $$ = new tree_statement_list (); } |
|
1
|
526 | list |
|
|
527 { $$ = $1; } |
|
496
|
528 ; |
|
1
|
529 |
|
2525
|
530 list : list1 opt_sep |
|
1511
|
531 { |
|
2525
|
532 set_stmt_print_flag ($1, $2, true); |
|
1829
|
533 $$ = $1; |
|
1
|
534 } |
|
|
535 ; |
|
|
536 |
|
578
|
537 list1 : statement |
|
440
|
538 { |
|
2857
|
539 lexer_flags.beginning_of_function = false; |
|
578
|
540 $$ = new tree_statement_list ($1); |
|
440
|
541 } |
|
2525
|
542 | list1 sep statement |
|
1511
|
543 { |
|
2525
|
544 set_stmt_print_flag ($1, $2, true); |
|
578
|
545 $1->append ($3); |
|
1511
|
546 $$ = $1; |
|
1
|
547 } |
|
|
548 ; |
|
|
549 |
|
2970
|
550 statement : expression |
|
3665
|
551 { |
|
|
552 octave_comment_list *comment |
|
|
553 = octave_comment_buffer::get_comment (); |
|
|
554 |
|
|
555 $$ = new tree_statement ($1, comment); |
|
|
556 } |
|
2970
|
557 | command |
|
3665
|
558 { |
|
|
559 octave_comment_list *comment |
|
|
560 = octave_comment_buffer::get_comment (); |
|
|
561 |
|
|
562 $$ = new tree_statement ($1, comment); |
|
|
563 } |
|
883
|
564 | PLOT CLEAR |
|
|
565 { |
|
|
566 symbol_record *sr = lookup_by_name ("clearplot", 0); |
|
|
567 tree_identifier *id = new tree_identifier (sr); |
|
3665
|
568 |
|
|
569 octave_comment_list *comment |
|
|
570 = octave_comment_buffer::get_comment (); |
|
|
571 |
|
|
572 $$ = new tree_statement (id, comment); |
|
883
|
573 } |
|
1
|
574 ; |
|
|
575 |
|
2970
|
576 // =========== |
|
|
577 // Expressions |
|
|
578 // =========== |
|
|
579 |
|
|
580 identifier : NAME |
|
|
581 { |
|
|
582 $$ = new tree_identifier |
|
|
583 ($1->sym_rec (), $1->line (), $1->column ()); |
|
|
584 } |
|
|
585 ; |
|
|
586 |
|
|
587 constant : NUM |
|
|
588 { $$ = make_constant (NUM, $1); } |
|
|
589 | IMAG_NUM |
|
|
590 { $$ = make_constant (IMAG_NUM, $1); } |
|
4064
|
591 | STRING |
|
|
592 { $$ = make_constant (STRING, $1); } |
|
2970
|
593 ; |
|
|
594 |
|
3189
|
595 in_matrix_or_assign_lhs |
|
|
596 : // empty |
|
|
597 { lexer_flags.looking_at_matrix_or_assign_lhs = true; } |
|
|
598 ; |
|
|
599 |
|
2970
|
600 matrix : '[' ']' |
|
|
601 { $$ = new tree_constant (octave_value (Matrix ())); } |
|
|
602 | '[' ';' ']' |
|
|
603 { $$ = new tree_constant (octave_value (Matrix ())); } |
|
3351
|
604 | '[' in_matrix_or_assign_lhs matrix_rows ']' |
|
3203
|
605 { |
|
|
606 $$ = finish_matrix ($3); |
|
|
607 lexer_flags.looking_at_matrix_or_assign_lhs = false; |
|
|
608 } |
|
2970
|
609 ; |
|
|
610 |
|
3351
|
611 matrix_rows : matrix_rows1 |
|
2970
|
612 { $$ = $1; } |
|
3351
|
613 | matrix_rows1 ';' // Ignore trailing semicolon. |
|
2970
|
614 { $$ = $1; } |
|
|
615 ; |
|
|
616 |
|
3351
|
617 matrix_rows1 : cell_or_matrix_row |
|
2970
|
618 { $$ = new tree_matrix ($1); } |
|
3351
|
619 | matrix_rows1 ';' cell_or_matrix_row |
|
2970
|
620 { |
|
|
621 $1->append ($3); |
|
|
622 $$ = $1; |
|
|
623 } |
|
|
624 ; |
|
|
625 |
|
3351
|
626 cell : '{' '}' |
|
3928
|
627 { $$ = new tree_constant (octave_value (Cell ())); } |
|
3351
|
628 | '{' ';' '}' |
|
3928
|
629 { $$ = new tree_constant (octave_value (Cell ())); } |
|
3351
|
630 | '{' cell_rows '}' |
|
|
631 { $$ = finish_cell ($2); } |
|
|
632 ; |
|
|
633 |
|
|
634 cell_rows : cell_rows1 |
|
|
635 { $$ = $1; } |
|
|
636 | cell_rows1 ';' // Ignore trailing semicolon. |
|
|
637 { $$ = $1; } |
|
|
638 ; |
|
|
639 |
|
|
640 cell_rows1 : cell_or_matrix_row |
|
|
641 { $$ = new tree_cell ($1); } |
|
|
642 | cell_rows1 ';' cell_or_matrix_row |
|
|
643 { |
|
|
644 $1->append ($3); |
|
|
645 $$ = $1; |
|
|
646 } |
|
|
647 ; |
|
|
648 |
|
|
649 cell_or_matrix_row |
|
|
650 : arg_list |
|
2970
|
651 { $$ = $1; } |
|
|
652 | arg_list ',' // Ignore trailing comma. |
|
|
653 { $$ = $1; } |
|
|
654 ; |
|
|
655 |
|
|
656 primary_expr : identifier |
|
|
657 { $$ = $1; } |
|
|
658 | constant |
|
|
659 { $$ = $1; } |
|
|
660 | matrix |
|
|
661 { $$ = $1; } |
|
3351
|
662 | cell |
|
|
663 { $$ = $1; } |
|
2970
|
664 | '(' expression ')' |
|
|
665 { $$ = $2->mark_in_parens (); } |
|
|
666 ; |
|
|
667 |
|
|
668 magic_colon : ':' |
|
|
669 { |
|
|
670 octave_value tmp (octave_value::magic_colon_t); |
|
|
671 $$ = new tree_constant (tmp); |
|
|
672 } |
|
|
673 ; |
|
|
674 |
|
|
675 arg_list : expression |
|
|
676 { $$ = new tree_argument_list ($1); } |
|
|
677 | magic_colon |
|
|
678 { $$ = new tree_argument_list ($1); } |
|
|
679 | ALL_VA_ARGS |
|
|
680 { |
|
|
681 octave_value tmp (octave_value::all_va_args_t); |
|
|
682 tree_constant *all_va_args = new tree_constant (tmp); |
|
|
683 $$ = new tree_argument_list (all_va_args); |
|
|
684 } |
|
|
685 | arg_list ',' magic_colon |
|
|
686 { |
|
|
687 $1->append ($3); |
|
|
688 $$ = $1; |
|
|
689 } |
|
|
690 | arg_list ',' expression |
|
|
691 { |
|
|
692 $1->append ($3); |
|
|
693 $$ = $1; |
|
|
694 } |
|
|
695 | arg_list ',' ALL_VA_ARGS |
|
|
696 { |
|
|
697 octave_value tmp (octave_value::all_va_args_t); |
|
|
698 tree_constant *all_va_args = new tree_constant (tmp); |
|
|
699 $1->append (all_va_args); |
|
|
700 $$ = $1; |
|
|
701 } |
|
|
702 ; |
|
|
703 |
|
4131
|
704 indirect_ref_op : '.' |
|
2970
|
705 { lexer_flags.looking_at_indirect_ref = true; } |
|
|
706 ; |
|
|
707 |
|
|
708 postfix_expr : primary_expr |
|
|
709 { $$ = $1; } |
|
|
710 | postfix_expr '(' ')' |
|
3933
|
711 { $$ = make_index_expression ($1, 0, '('); } |
|
2970
|
712 | postfix_expr '(' arg_list ')' |
|
3933
|
713 { $$ = make_index_expression ($1, $3, '('); } |
|
3929
|
714 | postfix_expr '{' '}' |
|
3933
|
715 { $$ = make_index_expression ($1, 0, '{'); } |
|
3351
|
716 | postfix_expr '{' arg_list '}' |
|
3933
|
717 { $$ = make_index_expression ($1, $3, '{'); } |
|
2970
|
718 | postfix_expr PLUS_PLUS |
|
|
719 { $$ = make_postfix_op (PLUS_PLUS, $1, $2); } |
|
|
720 | postfix_expr MINUS_MINUS |
|
|
721 { $$ = make_postfix_op (MINUS_MINUS, $1, $2); } |
|
|
722 | postfix_expr QUOTE |
|
|
723 { $$ = make_postfix_op (QUOTE, $1, $2); } |
|
|
724 | postfix_expr TRANSPOSE |
|
|
725 { $$ = make_postfix_op (TRANSPOSE, $1, $2); } |
|
4131
|
726 | postfix_expr indirect_ref_op STRUCT_ELT |
|
|
727 { $$ = make_indirect_ref ($1, $3->text ()); } |
|
|
728 | postfix_expr indirect_ref_op '(' expression ')' |
|
|
729 { $$ = make_indirect_ref ($1, $4); } |
|
2970
|
730 ; |
|
|
731 |
|
|
732 prefix_expr : postfix_expr |
|
|
733 { $$ = $1; } |
|
3178
|
734 | binary_expr |
|
|
735 { $$ = $1; } |
|
2970
|
736 | PLUS_PLUS prefix_expr %prec UNARY |
|
|
737 { $$ = make_prefix_op (PLUS_PLUS, $2, $1); } |
|
|
738 | MINUS_MINUS prefix_expr %prec UNARY |
|
|
739 { $$ = make_prefix_op (MINUS_MINUS, $2, $1); } |
|
|
740 | EXPR_NOT prefix_expr %prec UNARY |
|
|
741 { $$ = make_prefix_op (EXPR_NOT, $2, $1); } |
|
|
742 | '+' prefix_expr %prec UNARY |
|
|
743 { $$ = $2; } |
|
|
744 | '-' prefix_expr %prec UNARY |
|
|
745 { $$ = make_prefix_op ('-', $2, $1); } |
|
|
746 ; |
|
|
747 |
|
3178
|
748 binary_expr : prefix_expr POW prefix_expr |
|
2970
|
749 { $$ = make_binary_op (POW, $1, $2, $3); } |
|
3178
|
750 | prefix_expr EPOW prefix_expr |
|
2970
|
751 { $$ = make_binary_op (EPOW, $1, $2, $3); } |
|
3178
|
752 | prefix_expr '+' prefix_expr |
|
2970
|
753 { $$ = make_binary_op ('+', $1, $2, $3); } |
|
3178
|
754 | prefix_expr '-' prefix_expr |
|
2970
|
755 { $$ = make_binary_op ('-', $1, $2, $3); } |
|
3178
|
756 | prefix_expr '*' prefix_expr |
|
2970
|
757 { $$ = make_binary_op ('*', $1, $2, $3); } |
|
3178
|
758 | prefix_expr '/' prefix_expr |
|
2970
|
759 { $$ = make_binary_op ('/', $1, $2, $3); } |
|
3178
|
760 | prefix_expr EPLUS prefix_expr |
|
2970
|
761 { $$ = make_binary_op ('+', $1, $2, $3); } |
|
3178
|
762 | prefix_expr EMINUS prefix_expr |
|
2970
|
763 { $$ = make_binary_op ('-', $1, $2, $3); } |
|
3178
|
764 | prefix_expr EMUL prefix_expr |
|
2970
|
765 { $$ = make_binary_op (EMUL, $1, $2, $3); } |
|
3178
|
766 | prefix_expr EDIV prefix_expr |
|
2970
|
767 { $$ = make_binary_op (EDIV, $1, $2, $3); } |
|
3178
|
768 | prefix_expr LEFTDIV prefix_expr |
|
2970
|
769 { $$ = make_binary_op (LEFTDIV, $1, $2, $3); } |
|
3178
|
770 | prefix_expr ELEFTDIV prefix_expr |
|
2970
|
771 { $$ = make_binary_op (ELEFTDIV, $1, $2, $3); } |
|
|
772 ; |
|
|
773 |
|
|
774 colon_expr : colon_expr1 |
|
|
775 { $$ = finish_colon_expression ($1); } |
|
|
776 ; |
|
|
777 |
|
3178
|
778 colon_expr1 : prefix_expr |
|
2970
|
779 { $$ = new tree_colon_expression ($1); } |
|
3178
|
780 | colon_expr1 ':' prefix_expr |
|
2970
|
781 { |
|
|
782 if (! ($$ = $1->append ($3))) |
|
|
783 ABORT_PARSE; |
|
|
784 } |
|
|
785 ; |
|
|
786 |
|
|
787 simple_expr : colon_expr |
|
|
788 { $$ = $1; } |
|
|
789 | simple_expr LSHIFT simple_expr |
|
|
790 { $$ = make_binary_op (LSHIFT, $1, $2, $3); } |
|
|
791 | simple_expr RSHIFT simple_expr |
|
|
792 { $$ = make_binary_op (RSHIFT, $1, $2, $3); } |
|
|
793 | simple_expr EXPR_LT simple_expr |
|
|
794 { $$ = make_binary_op (EXPR_LT, $1, $2, $3); } |
|
|
795 | simple_expr EXPR_LE simple_expr |
|
|
796 { $$ = make_binary_op (EXPR_LE, $1, $2, $3); } |
|
|
797 | simple_expr EXPR_EQ simple_expr |
|
|
798 { $$ = make_binary_op (EXPR_EQ, $1, $2, $3); } |
|
|
799 | simple_expr EXPR_GE simple_expr |
|
|
800 { $$ = make_binary_op (EXPR_GE, $1, $2, $3); } |
|
|
801 | simple_expr EXPR_GT simple_expr |
|
|
802 { $$ = make_binary_op (EXPR_GT, $1, $2, $3); } |
|
|
803 | simple_expr EXPR_NE simple_expr |
|
|
804 { $$ = make_binary_op (EXPR_NE, $1, $2, $3); } |
|
|
805 | simple_expr EXPR_AND simple_expr |
|
|
806 { $$ = make_binary_op (EXPR_AND, $1, $2, $3); } |
|
|
807 | simple_expr EXPR_OR simple_expr |
|
|
808 { $$ = make_binary_op (EXPR_OR, $1, $2, $3); } |
|
|
809 | simple_expr EXPR_AND_AND simple_expr |
|
|
810 { $$ = make_boolean_op (EXPR_AND_AND, $1, $2, $3); } |
|
|
811 | simple_expr EXPR_OR_OR simple_expr |
|
|
812 { $$ = make_boolean_op (EXPR_OR_OR, $1, $2, $3); } |
|
|
813 ; |
|
|
814 |
|
|
815 // Arrange for the lexer to return CLOSE_BRACE for `]' by looking ahead |
|
|
816 // one token for an assignment op. |
|
|
817 |
|
|
818 assign_lhs : simple_expr |
|
|
819 { $$ = new tree_argument_list ($1); } |
|
3189
|
820 | '[' in_matrix_or_assign_lhs arg_list CLOSE_BRACE |
|
|
821 { |
|
|
822 $$ = $3; |
|
|
823 lexer_flags.looking_at_matrix_or_assign_lhs = false; |
|
|
824 } |
|
2970
|
825 ; |
|
|
826 |
|
|
827 assign_expr : assign_lhs '=' expression |
|
|
828 { $$ = make_assign_op ('=', $1, $2, $3); } |
|
|
829 | assign_lhs ADD_EQ expression |
|
|
830 { $$ = make_assign_op (ADD_EQ, $1, $2, $3); } |
|
|
831 | assign_lhs SUB_EQ expression |
|
|
832 { $$ = make_assign_op (SUB_EQ, $1, $2, $3); } |
|
|
833 | assign_lhs MUL_EQ expression |
|
|
834 { $$ = make_assign_op (MUL_EQ, $1, $2, $3); } |
|
|
835 | assign_lhs DIV_EQ expression |
|
|
836 { $$ = make_assign_op (DIV_EQ, $1, $2, $3); } |
|
3204
|
837 | assign_lhs LEFTDIV_EQ expression |
|
|
838 { $$ = make_assign_op (LEFTDIV_EQ, $1, $2, $3); } |
|
4018
|
839 | assign_lhs POW_EQ expression |
|
|
840 { $$ = make_assign_op (POW_EQ, $1, $2, $3); } |
|
2970
|
841 | assign_lhs LSHIFT_EQ expression |
|
|
842 { $$ = make_assign_op (LSHIFT_EQ, $1, $2, $3); } |
|
|
843 | assign_lhs RSHIFT_EQ expression |
|
|
844 { $$ = make_assign_op (RSHIFT_EQ, $1, $2, $3); } |
|
|
845 | assign_lhs EMUL_EQ expression |
|
|
846 { $$ = make_assign_op (EMUL_EQ, $1, $2, $3); } |
|
|
847 | assign_lhs EDIV_EQ expression |
|
|
848 { $$ = make_assign_op (EDIV_EQ, $1, $2, $3); } |
|
3204
|
849 | assign_lhs ELEFTDIV_EQ expression |
|
|
850 { $$ = make_assign_op (ELEFTDIV_EQ, $1, $2, $3); } |
|
4018
|
851 | assign_lhs EPOW_EQ expression |
|
|
852 { $$ = make_assign_op (EPOW_EQ, $1, $2, $3); } |
|
2970
|
853 | assign_lhs AND_EQ expression |
|
|
854 { $$ = make_assign_op (AND_EQ, $1, $2, $3); } |
|
|
855 | assign_lhs OR_EQ expression |
|
|
856 { $$ = make_assign_op (OR_EQ, $1, $2, $3); } |
|
|
857 ; |
|
|
858 |
|
|
859 word_list_cmd : identifier word_list |
|
3933
|
860 { $$ = make_index_expression ($1, $2, '('); } |
|
2970
|
861 ; |
|
|
862 |
|
4064
|
863 word_list : STRING |
|
2970
|
864 { |
|
4064
|
865 tree_constant *tmp = make_constant (STRING, $1); |
|
2970
|
866 $$ = new tree_argument_list (tmp); |
|
|
867 } |
|
4064
|
868 | word_list STRING |
|
2970
|
869 { |
|
4064
|
870 tree_constant *tmp = make_constant (STRING, $2); |
|
2970
|
871 $1->append (tmp); |
|
|
872 $$ = $1; |
|
|
873 } |
|
|
874 ; |
|
|
875 |
|
|
876 expression : simple_expr |
|
|
877 { $$ = $1; } |
|
|
878 | word_list_cmd |
|
|
879 { $$ = $1; } |
|
|
880 | assign_expr |
|
|
881 { $$ = $1; } |
|
|
882 ; |
|
|
883 |
|
|
884 // ================================================ |
|
|
885 // Commands, declarations, and function definitions |
|
|
886 // ================================================ |
|
|
887 |
|
|
888 command : declaration |
|
|
889 { $$ = $1; } |
|
|
890 | select_command |
|
|
891 { $$ = $1; } |
|
|
892 | loop_command |
|
|
893 { $$ = $1; } |
|
|
894 | jump_command |
|
|
895 { $$ = $1; } |
|
|
896 | except_command |
|
|
897 { $$ = $1; } |
|
|
898 | function |
|
|
899 { $$ = $1; } |
|
|
900 | plot_command |
|
|
901 { $$ = $1; } |
|
|
902 ; |
|
|
903 |
|
|
904 // ===================== |
|
|
905 // Declaration statemnts |
|
|
906 // ===================== |
|
|
907 |
|
|
908 declaration : GLOBAL decl1 |
|
|
909 { $$ = make_decl_command (GLOBAL, $1, $2); } |
|
|
910 | STATIC decl1 |
|
|
911 { $$ = make_decl_command (STATIC, $1, $2); } |
|
|
912 ; |
|
|
913 |
|
|
914 decl1 : decl2 |
|
|
915 { $$ = new tree_decl_init_list ($1); } |
|
|
916 | decl1 decl2 |
|
|
917 { |
|
|
918 $1->append ($2); |
|
|
919 $$ = $1; |
|
|
920 } |
|
|
921 ; |
|
|
922 |
|
|
923 decl2 : identifier |
|
|
924 { $$ = new tree_decl_elt ($1); } |
|
|
925 | identifier '=' expression |
|
|
926 { $$ = new tree_decl_elt ($1, $3); } |
|
|
927 ; |
|
|
928 |
|
|
929 // ==================== |
|
|
930 // Selection statements |
|
|
931 // ==================== |
|
|
932 |
|
|
933 select_command : if_command |
|
|
934 { $$ = $1; } |
|
|
935 | switch_command |
|
|
936 { $$ = $1; } |
|
|
937 ; |
|
|
938 |
|
|
939 // ============ |
|
|
940 // If statement |
|
|
941 // ============ |
|
|
942 |
|
3665
|
943 if_command : IF stash_comment if_cmd_list END |
|
2970
|
944 { |
|
3665
|
945 if (! ($$ = finish_if_command ($1, $3, $4, $2))) |
|
2970
|
946 ABORT_PARSE; |
|
|
947 } |
|
|
948 ; |
|
|
949 |
|
|
950 if_cmd_list : if_cmd_list1 |
|
|
951 { $$ = $1; } |
|
|
952 | if_cmd_list1 else_clause |
|
|
953 { |
|
|
954 $1->append ($2); |
|
|
955 $$ = $1; |
|
|
956 } |
|
|
957 ; |
|
|
958 |
|
|
959 if_cmd_list1 : expression opt_sep opt_list |
|
|
960 { $$ = start_if_command ($1, $3); } |
|
|
961 | if_cmd_list1 elseif_clause |
|
|
962 { |
|
|
963 $1->append ($2); |
|
|
964 $$ = $1; |
|
|
965 } |
|
|
966 ; |
|
|
967 |
|
3665
|
968 elseif_clause : ELSEIF stash_comment opt_sep expression opt_sep opt_list |
|
|
969 { $$ = make_elseif_clause ($4, $6, $2); } |
|
2970
|
970 ; |
|
|
971 |
|
3665
|
972 else_clause : ELSE stash_comment opt_sep opt_list |
|
|
973 { |
|
|
974 $$ = new tree_if_clause ($4, $2); |
|
|
975 } |
|
2970
|
976 ; |
|
|
977 |
|
|
978 // ================ |
|
|
979 // Switch statement |
|
|
980 // ================ |
|
|
981 |
|
3665
|
982 switch_command : SWITCH stash_comment expression opt_sep case_list END |
|
2970
|
983 { |
|
3665
|
984 if (! ($$ = finish_switch_command ($1, $3, $5, $6, $2))) |
|
2970
|
985 ABORT_PARSE; |
|
|
986 } |
|
|
987 ; |
|
|
988 |
|
4044
|
989 case_list : // empty |
|
|
990 { $$ = new tree_switch_case_list (); } |
|
|
991 | case_list1 |
|
2970
|
992 { $$ = $1; } |
|
|
993 | case_list1 default_case |
|
|
994 { |
|
|
995 $1->append ($2); |
|
|
996 $$ = $1; |
|
|
997 } |
|
|
998 ; |
|
|
999 |
|
|
1000 case_list1 : switch_case |
|
|
1001 { $$ = new tree_switch_case_list ($1); } |
|
|
1002 | case_list1 switch_case |
|
|
1003 { |
|
|
1004 $1->append ($2); |
|
|
1005 $$ = $1; |
|
|
1006 } |
|
|
1007 ; |
|
|
1008 |
|
4025
|
1009 switch_case : CASE stash_comment opt_sep expression opt_sep opt_list |
|
3665
|
1010 { $$ = make_switch_case ($4, $6, $2); } |
|
2970
|
1011 ; |
|
|
1012 |
|
3665
|
1013 default_case : OTHERWISE stash_comment opt_sep opt_list |
|
|
1014 { |
|
|
1015 $$ = new tree_switch_case ($4, $2); |
|
|
1016 } |
|
2970
|
1017 ; |
|
|
1018 |
|
|
1019 // ======= |
|
|
1020 // Looping |
|
|
1021 // ======= |
|
|
1022 |
|
3665
|
1023 loop_command : WHILE stash_comment expression opt_sep opt_list END |
|
2970
|
1024 { |
|
3665
|
1025 if (! ($$ = make_while_command ($1, $3, $5, $6, $2))) |
|
2970
|
1026 ABORT_PARSE; |
|
|
1027 } |
|
3665
|
1028 | DO stash_comment opt_sep opt_list UNTIL expression |
|
3484
|
1029 { |
|
3665
|
1030 if (! ($$ = make_do_until_command ($1, $4, $6, $2))) |
|
3484
|
1031 ABORT_PARSE; |
|
|
1032 } |
|
3665
|
1033 | FOR stash_comment assign_lhs '=' expression opt_sep opt_list END |
|
2970
|
1034 { |
|
3665
|
1035 if (! ($$ = make_for_command ($1, $3, $5, $7, $8, $2))) |
|
2970
|
1036 ABORT_PARSE; |
|
|
1037 } |
|
|
1038 ; |
|
|
1039 |
|
|
1040 // ======= |
|
|
1041 // Jumping |
|
|
1042 // ======= |
|
|
1043 |
|
|
1044 jump_command : BREAK |
|
|
1045 { |
|
|
1046 if (! ($$ = make_break_command ($1))) |
|
|
1047 ABORT_PARSE; |
|
|
1048 } |
|
|
1049 | CONTINUE |
|
|
1050 { |
|
|
1051 if (! ($$ = make_continue_command ($1))) |
|
|
1052 ABORT_PARSE; |
|
|
1053 } |
|
|
1054 | FUNC_RET |
|
|
1055 { |
|
|
1056 if (! ($$ = make_return_command ($1))) |
|
|
1057 ABORT_PARSE; |
|
|
1058 } |
|
|
1059 ; |
|
|
1060 |
|
|
1061 // ========== |
|
|
1062 // Exceptions |
|
|
1063 // ========== |
|
|
1064 |
|
3665
|
1065 except_command : UNWIND stash_comment opt_sep opt_list CLEANUP |
|
|
1066 stash_comment opt_sep opt_list END |
|
2970
|
1067 { |
|
3665
|
1068 if (! ($$ = make_unwind_command ($1, $4, $8, $9, $2, $6))) |
|
2970
|
1069 ABORT_PARSE; |
|
|
1070 } |
|
3665
|
1071 | TRY stash_comment opt_sep opt_list CATCH |
|
|
1072 stash_comment opt_sep opt_list END |
|
2970
|
1073 { |
|
3665
|
1074 if (! ($$ = make_try_command ($1, $4, $8, $9, $2, $6))) |
|
2970
|
1075 ABORT_PARSE; |
|
|
1076 } |
|
|
1077 ; |
|
|
1078 |
|
|
1079 // =========================================== |
|
|
1080 // Some `subroutines' for function definitions |
|
|
1081 // =========================================== |
|
|
1082 |
|
3903
|
1083 save_symtab : // empty |
|
|
1084 { |
|
|
1085 if (symtab_context) |
|
|
1086 panic_impossible (); |
|
|
1087 |
|
|
1088 symtab_context = curr_sym_tab; |
|
|
1089 } |
|
|
1090 ; |
|
|
1091 |
|
4009
|
1092 function_symtab : // empty |
|
|
1093 { curr_sym_tab = fbi_sym_tab; } |
|
2970
|
1094 ; |
|
|
1095 |
|
|
1096 local_symtab : // empty |
|
|
1097 { curr_sym_tab = tmp_local_sym_tab; } |
|
|
1098 ; |
|
|
1099 |
|
|
1100 in_return_list : // empty |
|
|
1101 { lexer_flags.looking_at_return_list = true; } |
|
|
1102 ; |
|
|
1103 |
|
|
1104 parsed_fcn_name : // empty |
|
|
1105 { lexer_flags.parsed_function_name = true; } |
|
|
1106 ; |
|
|
1107 |
|
|
1108 // =========================== |
|
|
1109 // List of function parameters |
|
|
1110 // =========================== |
|
|
1111 |
|
|
1112 param_list_beg : '(' |
|
|
1113 { lexer_flags.looking_at_parameter_list = true; } |
|
|
1114 ; |
|
|
1115 |
|
|
1116 param_list_end : ')' |
|
|
1117 { lexer_flags.looking_at_parameter_list = false; } |
|
|
1118 ; |
|
|
1119 |
|
|
1120 param_list : param_list_beg param_list_end |
|
|
1121 { |
|
|
1122 lexer_flags.quote_is_transpose = false; |
|
|
1123 $$ = 0; |
|
|
1124 } |
|
3973
|
1125 | param_list_beg VARARGIN param_list_end |
|
2970
|
1126 { |
|
|
1127 lexer_flags.quote_is_transpose = false; |
|
|
1128 tree_parameter_list *tmp = new tree_parameter_list (); |
|
|
1129 tmp->mark_varargs_only (); |
|
|
1130 $$ = tmp; |
|
|
1131 } |
|
|
1132 | param_list1 param_list_end |
|
|
1133 { |
|
|
1134 lexer_flags.quote_is_transpose = false; |
|
|
1135 $1->mark_as_formal_parameters (); |
|
|
1136 $$ = $1; |
|
|
1137 } |
|
3973
|
1138 | param_list1 ',' VARARGIN param_list_end |
|
2970
|
1139 { |
|
|
1140 lexer_flags.quote_is_transpose = false; |
|
|
1141 $1->mark_as_formal_parameters (); |
|
|
1142 $1->mark_varargs (); |
|
|
1143 $$ = $1; |
|
|
1144 } |
|
|
1145 ; |
|
|
1146 |
|
|
1147 param_list1 : param_list_beg identifier |
|
|
1148 { $$ = new tree_parameter_list ($2); } |
|
|
1149 | param_list1 ',' identifier |
|
|
1150 { |
|
|
1151 $1->append ($3); |
|
|
1152 $$ = $1; |
|
|
1153 } |
|
|
1154 | param_list_beg error |
|
|
1155 { |
|
|
1156 yyerror ("invalid parameter list"); |
|
|
1157 $$ = 0; |
|
|
1158 ABORT_PARSE; |
|
|
1159 } |
|
|
1160 | param_list1 ',' error |
|
|
1161 { |
|
|
1162 yyerror ("invalid parameter list"); |
|
|
1163 $$ = 0; |
|
|
1164 ABORT_PARSE; |
|
|
1165 } |
|
|
1166 ; |
|
|
1167 |
|
|
1168 // =================================== |
|
|
1169 // List of function return value names |
|
|
1170 // =================================== |
|
|
1171 |
|
3189
|
1172 return_list_beg : '[' in_return_list local_symtab |
|
2970
|
1173 ; |
|
|
1174 |
|
|
1175 return_list : return_list_beg return_list_end |
|
|
1176 { |
|
|
1177 lexer_flags.looking_at_return_list = false; |
|
|
1178 $$ = new tree_parameter_list (); |
|
|
1179 } |
|
3973
|
1180 | return_list_beg VARARGOUT return_list_end |
|
2970
|
1181 { |
|
|
1182 lexer_flags.looking_at_return_list = false; |
|
|
1183 tree_parameter_list *tmp = new tree_parameter_list (); |
|
|
1184 tmp->mark_varargs_only (); |
|
|
1185 $$ = tmp; |
|
|
1186 } |
|
|
1187 | return_list_beg return_list1 return_list_end |
|
|
1188 { |
|
|
1189 lexer_flags.looking_at_return_list = false; |
|
|
1190 $$ = $2; |
|
|
1191 } |
|
3973
|
1192 | return_list_beg return_list1 ',' VARARGOUT return_list_end |
|
2970
|
1193 { |
|
|
1194 lexer_flags.looking_at_return_list = false; |
|
|
1195 $2->mark_varargs (); |
|
|
1196 $$ = $2; |
|
|
1197 } |
|
|
1198 ; |
|
|
1199 |
|
|
1200 return_list1 : identifier |
|
|
1201 { $$ = new tree_parameter_list ($1); } |
|
|
1202 | return_list1 ',' identifier |
|
|
1203 { |
|
|
1204 $1->append ($3); |
|
|
1205 $$ = $1; |
|
|
1206 } |
|
|
1207 ; |
|
|
1208 |
|
4009
|
1209 return_list_end : function_symtab ']' |
|
2970
|
1210 ; |
|
|
1211 |
|
|
1212 // =================== |
|
|
1213 // Function definition |
|
|
1214 // =================== |
|
|
1215 |
|
4009
|
1216 function_beg : save_symtab FCN stash_comment function_symtab |
|
3903
|
1217 { $$ = $3; } |
|
2970
|
1218 ; |
|
|
1219 |
|
|
1220 function : function_beg function2 |
|
|
1221 { |
|
3665
|
1222 $2->stash_leading_comment ($1); |
|
2970
|
1223 recover_from_parsing_function (); |
|
|
1224 $$ = 0; |
|
|
1225 } |
|
|
1226 | function_beg identifier function1 |
|
|
1227 { |
|
3665
|
1228 finish_function ($2, $3, $1); |
|
2970
|
1229 recover_from_parsing_function (); |
|
|
1230 $$ = 0; |
|
|
1231 } |
|
|
1232 | function_beg return_list function1 |
|
|
1233 { |
|
3665
|
1234 finish_function ($2, $3, $1); |
|
2970
|
1235 recover_from_parsing_function (); |
|
|
1236 $$ = 0; |
|
|
1237 } |
|
|
1238 ; |
|
|
1239 |
|
4009
|
1240 function1 : function_symtab '=' function2 |
|
2970
|
1241 { $$ = $3; } |
|
|
1242 ; |
|
|
1243 |
|
|
1244 function2 : identifier local_symtab parsed_fcn_name function3 |
|
|
1245 { |
|
|
1246 if (! ($$ = frob_function ($1, $4))) |
|
|
1247 ABORT_PARSE; |
|
|
1248 } |
|
|
1249 ; |
|
|
1250 |
|
|
1251 function3 : param_list function4 |
|
|
1252 { $$ = start_function ($1, $2); } |
|
|
1253 | function4 |
|
|
1254 { $$ = start_function (0, $1); } |
|
|
1255 ; |
|
|
1256 |
|
|
1257 function4 : opt_sep opt_list function_end |
|
|
1258 { $$ = $2; } |
|
|
1259 ; |
|
|
1260 |
|
|
1261 function_end : END |
|
|
1262 { |
|
|
1263 if (end_token_ok ($1, token::function_end)) |
|
|
1264 { |
|
|
1265 if (reading_fcn_file) |
|
|
1266 check_for_garbage_after_fcn_def (); |
|
|
1267 } |
|
|
1268 else |
|
|
1269 ABORT_PARSE; |
|
|
1270 } |
|
|
1271 | END_OF_INPUT |
|
|
1272 { |
|
3939
|
1273 if (! (reading_fcn_file || reading_script_file |
|
|
1274 || get_input_from_eval_string)) |
|
2970
|
1275 YYABORT; |
|
|
1276 } |
|
|
1277 ; |
|
|
1278 |
|
|
1279 // ======== |
|
|
1280 // Plotting |
|
|
1281 // ======== |
|
|
1282 |
|
3180
|
1283 plot_command : PLOT |
|
|
1284 { |
|
|
1285 if (! ($$ = make_plot_command ($1, 0, 0))) |
|
|
1286 ABORT_PARSE; |
|
|
1287 } |
|
|
1288 | PLOT ranges |
|
|
1289 { |
|
|
1290 if (! ($$ = make_plot_command ($1, $2, 0))) |
|
|
1291 ABORT_PARSE; |
|
|
1292 } |
|
|
1293 | PLOT plot_command1 |
|
1
|
1294 { |
|
1623
|
1295 if (! ($$ = make_plot_command ($1, 0, $2))) |
|
|
1296 ABORT_PARSE; |
|
1
|
1297 } |
|
|
1298 | PLOT ranges plot_command1 |
|
|
1299 { |
|
1623
|
1300 if (! ($$ = make_plot_command ($1, $2, $3))) |
|
|
1301 ABORT_PARSE; |
|
1
|
1302 } |
|
|
1303 ; |
|
|
1304 |
|
|
1305 ranges : ranges1 |
|
578
|
1306 { $$ = new plot_limits ($1); } |
|
1
|
1307 | ranges1 ranges1 |
|
578
|
1308 { $$ = new plot_limits ($1, $2); } |
|
1
|
1309 | ranges1 ranges1 ranges1 |
|
578
|
1310 { $$ = new plot_limits ($1, $2, $3); } |
|
1
|
1311 ; |
|
|
1312 |
|
|
1313 ranges1 : OPEN_BRACE expression COLON expression CLOSE_BRACE |
|
578
|
1314 { $$ = new plot_range ($2, $4); } |
|
1
|
1315 | OPEN_BRACE COLON expression CLOSE_BRACE |
|
578
|
1316 { $$ = new plot_range (0, $3); } |
|
1
|
1317 | OPEN_BRACE expression COLON CLOSE_BRACE |
|
578
|
1318 { $$ = new plot_range ($2, 0); } |
|
1
|
1319 | OPEN_BRACE COLON CLOSE_BRACE |
|
578
|
1320 { $$ = new plot_range (); } |
|
1
|
1321 | OPEN_BRACE CLOSE_BRACE |
|
578
|
1322 { $$ = new plot_range (); } |
|
1
|
1323 ; |
|
|
1324 |
|
3180
|
1325 plot_command1 : plot_command2 |
|
578
|
1326 { $$ = new subplot_list ($1); } |
|
1
|
1327 | plot_command1 ',' plot_command2 |
|
1829
|
1328 { |
|
|
1329 $1->append ($3); |
|
|
1330 $$ = $1; |
|
|
1331 } |
|
1
|
1332 ; |
|
|
1333 |
|
|
1334 plot_command2 : expression |
|
578
|
1335 { $$ = new subplot ($1); } |
|
1
|
1336 | expression plot_options |
|
3165
|
1337 { $$ = $2->add_data ($1); } |
|
1
|
1338 ; |
|
|
1339 |
|
|
1340 plot_options : using |
|
3165
|
1341 { |
|
|
1342 subplot *tmp = new subplot (); |
|
|
1343 $$ = tmp->add_clause ($1); |
|
|
1344 } |
|
1
|
1345 | title |
|
3165
|
1346 { |
|
|
1347 subplot *tmp = new subplot (); |
|
|
1348 $$ = tmp->add_clause ($1); |
|
|
1349 } |
|
1
|
1350 | style |
|
3165
|
1351 { |
|
|
1352 subplot *tmp = new subplot (); |
|
|
1353 $$ = tmp->add_clause ($1); |
|
|
1354 } |
|
|
1355 | axes |
|
|
1356 { |
|
|
1357 subplot *tmp = new subplot (); |
|
|
1358 $$ = tmp->add_clause ($1); |
|
|
1359 } |
|
|
1360 | plot_options using |
|
|
1361 { |
|
|
1362 if (! ($$ = $1->add_clause ($2))) |
|
|
1363 { |
|
|
1364 yyerror ("only one using option may be specified"); |
|
|
1365 ABORT_PARSE; |
|
|
1366 } |
|
|
1367 } |
|
|
1368 | plot_options title |
|
|
1369 { |
|
|
1370 if (! ($$ = $1->add_clause ($2))) |
|
|
1371 { |
|
|
1372 yyerror ("only one title option my be specified"); |
|
|
1373 ABORT_PARSE; |
|
|
1374 } |
|
|
1375 } |
|
|
1376 | plot_options style |
|
|
1377 { |
|
|
1378 if (! ($$ = $1->add_clause ($2))) |
|
|
1379 { |
|
|
1380 yyerror ("only one style option my be specified"); |
|
|
1381 ABORT_PARSE; |
|
|
1382 } |
|
|
1383 } |
|
|
1384 | plot_options axes |
|
|
1385 { |
|
|
1386 if (! ($$ = $1->add_clause ($2))) |
|
|
1387 { |
|
|
1388 yyerror ("only one axes option may be specified"); |
|
|
1389 ABORT_PARSE; |
|
|
1390 } |
|
|
1391 } |
|
|
1392 ; |
|
|
1393 |
|
|
1394 axes : AXES AXES_TAG |
|
|
1395 { |
|
|
1396 lexer_flags.in_plot_axes = false; |
|
|
1397 $$ = new subplot_axes ($2->text ()); |
|
|
1398 } |
|
1
|
1399 ; |
|
|
1400 |
|
|
1401 using : using1 |
|
|
1402 { |
|
2857
|
1403 lexer_flags.in_plot_using = false; |
|
1
|
1404 $$ = $1; |
|
|
1405 } |
|
|
1406 | using1 expression |
|
|
1407 { |
|
2857
|
1408 lexer_flags.in_plot_using = false; |
|
1
|
1409 $$ = $1->set_format ($2); |
|
|
1410 } |
|
|
1411 ; |
|
|
1412 |
|
|
1413 using1 : USING expression |
|
|
1414 { |
|
578
|
1415 subplot_using *tmp = new subplot_using (); |
|
1
|
1416 $$ = tmp->add_qualifier ($2); |
|
|
1417 } |
|
|
1418 | using1 COLON expression |
|
|
1419 { $$ = $1->add_qualifier ($3); } |
|
|
1420 ; |
|
|
1421 |
|
|
1422 title : TITLE expression |
|
|
1423 { $$ = $2; } |
|
|
1424 ; |
|
|
1425 |
|
|
1426 style : WITH STYLE |
|
1755
|
1427 { $$ = new subplot_style ($2->text ()); } |
|
1
|
1428 | WITH STYLE expression |
|
1755
|
1429 { $$ = new subplot_style ($2->text (), $3); } |
|
2542
|
1430 | WITH STYLE expression expression |
|
|
1431 { $$ = new subplot_style ($2->text (), $3, $4); } |
|
1
|
1432 ; |
|
|
1433 |
|
2970
|
1434 // ============= |
|
|
1435 // Miscellaneous |
|
|
1436 // ============= |
|
|
1437 |
|
3665
|
1438 stash_comment : // empty |
|
|
1439 { $$ = octave_comment_buffer::get_comment (); } |
|
|
1440 ; |
|
|
1441 |
|
2970
|
1442 parse_error : LEXICAL_ERROR |
|
|
1443 { yyerror ("parse error"); } |
|
|
1444 | error |
|
1
|
1445 ; |
|
|
1446 |
|
2525
|
1447 sep_no_nl : ',' |
|
|
1448 { $$ = ','; } |
|
|
1449 | ';' |
|
|
1450 { $$ = ';'; } |
|
|
1451 | sep_no_nl ',' |
|
|
1452 { $$ = $1; } |
|
|
1453 | sep_no_nl ';' |
|
|
1454 { $$ = $1; } |
|
|
1455 ; |
|
|
1456 |
|
|
1457 opt_sep_no_nl : // empty |
|
|
1458 { $$ = 0; } |
|
|
1459 | sep_no_nl |
|
|
1460 { $$ = $1; } |
|
|
1461 ; |
|
|
1462 |
|
|
1463 sep : ',' |
|
|
1464 { $$ = ','; } |
|
|
1465 | ';' |
|
|
1466 { $$ = ';'; } |
|
|
1467 | '\n' |
|
|
1468 { $$ = '\n'; } |
|
|
1469 | sep ',' |
|
|
1470 { $$ = $1; } |
|
|
1471 | sep ';' |
|
|
1472 { $$ = $1; } |
|
|
1473 | sep '\n' |
|
|
1474 { $$ = $1; } |
|
|
1475 ; |
|
|
1476 |
|
|
1477 opt_sep : // empty |
|
|
1478 { $$ = 0; } |
|
|
1479 | sep |
|
|
1480 { $$ = $1; } |
|
|
1481 ; |
|
|
1482 |
|
1
|
1483 %% |
|
|
1484 |
|
666
|
1485 // Generic error messages. |
|
|
1486 |
|
1
|
1487 static void |
|
2805
|
1488 yyerror (const char *s) |
|
1
|
1489 { |
|
143
|
1490 int err_col = current_input_column - 1; |
|
1
|
1491 |
|
4051
|
1492 OSSTREAM output_buf; |
|
1
|
1493 |
|
1005
|
1494 if (reading_fcn_file || reading_script_file) |
|
|
1495 output_buf << "parse error near line " << input_line_number |
|
1607
|
1496 << " of file " << curr_fcn_file_full_name; |
|
1005
|
1497 else |
|
|
1498 output_buf << "parse error:"; |
|
581
|
1499 |
|
1005
|
1500 if (s && strcmp (s, "parse error") != 0) |
|
|
1501 output_buf << "\n\n " << s; |
|
|
1502 |
|
|
1503 output_buf << "\n\n"; |
|
1
|
1504 |
|
1755
|
1505 if (! current_input_line.empty ()) |
|
1
|
1506 { |
|
1755
|
1507 size_t len = current_input_line.length (); |
|
1060
|
1508 |
|
1755
|
1509 if (current_input_line[len-1] == '\n') |
|
|
1510 current_input_line.resize (len-1); |
|
1005
|
1511 |
|
4051
|
1512 // Print the line, maybe with a pointer near the error token. |
|
1005
|
1513 |
|
1755
|
1514 output_buf << ">>> " << current_input_line << "\n"; |
|
1060
|
1515 |
|
|
1516 if (err_col == 0) |
|
|
1517 err_col = len; |
|
|
1518 |
|
|
1519 for (int i = 0; i < err_col + 3; i++) |
|
|
1520 output_buf << " "; |
|
|
1521 |
|
|
1522 output_buf << "^"; |
|
1
|
1523 } |
|
1005
|
1524 |
|
4051
|
1525 output_buf << "\n" << OSSTREAM_ENDS; |
|
|
1526 |
|
|
1527 parse_error ("%s", OSSTREAM_C_STR (output_buf)); |
|
|
1528 |
|
|
1529 OSSTREAM_FREEZE (output_buf); |
|
1
|
1530 } |
|
|
1531 |
|
666
|
1532 // Error mesages for mismatched end tokens. |
|
|
1533 |
|
496
|
1534 static void |
|
2805
|
1535 end_error (const char *type, token::end_tok_type ettype, int l, int c) |
|
496
|
1536 { |
|
2805
|
1537 static const char *fmt |
|
|
1538 = "`%s' command matched by `%s' near line %d column %d"; |
|
496
|
1539 |
|
|
1540 switch (ettype) |
|
|
1541 { |
|
|
1542 case token::simple_end: |
|
|
1543 error (fmt, type, "end", l, c); |
|
|
1544 break; |
|
777
|
1545 |
|
496
|
1546 case token::for_end: |
|
|
1547 error (fmt, type, "endfor", l, c); |
|
|
1548 break; |
|
777
|
1549 |
|
496
|
1550 case token::function_end: |
|
|
1551 error (fmt, type, "endfunction", l, c); |
|
|
1552 break; |
|
777
|
1553 |
|
496
|
1554 case token::if_end: |
|
|
1555 error (fmt, type, "endif", l, c); |
|
|
1556 break; |
|
777
|
1557 |
|
3233
|
1558 case token::switch_end: |
|
|
1559 error (fmt, type, "endswitch", l, c); |
|
|
1560 break; |
|
|
1561 |
|
496
|
1562 case token::while_end: |
|
|
1563 error (fmt, type, "endwhile", l, c); |
|
|
1564 break; |
|
777
|
1565 |
|
1371
|
1566 case token::unwind_protect_end: |
|
|
1567 error (fmt, type, "end_unwind_protect", l, c); |
|
|
1568 break; |
|
|
1569 |
|
496
|
1570 default: |
|
|
1571 panic_impossible (); |
|
|
1572 break; |
|
|
1573 } |
|
|
1574 } |
|
|
1575 |
|
666
|
1576 // Check to see that end tokens are properly matched. |
|
|
1577 |
|
2857
|
1578 static bool |
|
|
1579 end_token_ok (token *tok, token::end_tok_type expected) |
|
143
|
1580 { |
|
2857
|
1581 bool retval = true; |
|
|
1582 |
|
143
|
1583 token::end_tok_type ettype = tok->ettype (); |
|
2857
|
1584 |
|
143
|
1585 if (ettype != expected && ettype != token::simple_end) |
|
|
1586 { |
|
2857
|
1587 retval = false; |
|
|
1588 |
|
143
|
1589 yyerror ("parse error"); |
|
|
1590 |
|
|
1591 int l = tok->line (); |
|
|
1592 int c = tok->column (); |
|
|
1593 |
|
|
1594 switch (expected) |
|
|
1595 { |
|
|
1596 case token::for_end: |
|
|
1597 end_error ("for", ettype, l, c); |
|
|
1598 break; |
|
777
|
1599 |
|
143
|
1600 case token::function_end: |
|
|
1601 end_error ("function", ettype, l, c); |
|
|
1602 break; |
|
777
|
1603 |
|
143
|
1604 case token::if_end: |
|
|
1605 end_error ("if", ettype, l, c); |
|
|
1606 break; |
|
777
|
1607 |
|
1489
|
1608 case token::try_catch_end: |
|
|
1609 end_error ("try", ettype, l, c); |
|
|
1610 break; |
|
|
1611 |
|
2764
|
1612 case token::switch_end: |
|
|
1613 end_error ("switch", ettype, l, c); |
|
|
1614 break; |
|
|
1615 |
|
1489
|
1616 case token::unwind_protect_end: |
|
|
1617 end_error ("unwind_protect", ettype, l, c); |
|
|
1618 break; |
|
|
1619 |
|
143
|
1620 case token::while_end: |
|
|
1621 end_error ("while", ettype, l, c); |
|
|
1622 break; |
|
777
|
1623 |
|
143
|
1624 default: |
|
|
1625 panic_impossible (); |
|
|
1626 break; |
|
|
1627 } |
|
|
1628 } |
|
2857
|
1629 |
|
|
1630 return retval; |
|
143
|
1631 } |
|
|
1632 |
|
666
|
1633 // Maybe print a warning if an assignment expression is used as the |
|
|
1634 // test in a logical expression. |
|
|
1635 |
|
496
|
1636 static void |
|
|
1637 maybe_warn_assign_as_truth_value (tree_expression *expr) |
|
1
|
1638 { |
|
2166
|
1639 if (Vwarn_assign_as_truth_value |
|
1
|
1640 && expr->is_assignment_expression () |
|
2961
|
1641 && expr->paren_count () < 2) |
|
1
|
1642 { |
|
|
1643 warning ("suggest parenthesis around assignment used as truth value"); |
|
|
1644 } |
|
|
1645 } |
|
578
|
1646 |
|
2764
|
1647 // Maybe print a warning about switch labels that aren't constants. |
|
|
1648 |
|
|
1649 static void |
|
|
1650 maybe_warn_variable_switch_label (tree_expression *expr) |
|
|
1651 { |
|
|
1652 if (Vwarn_variable_switch_label && ! expr->is_constant ()) |
|
|
1653 { |
|
|
1654 warning ("variable switch label"); |
|
|
1655 } |
|
|
1656 } |
|
|
1657 |
|
1623
|
1658 // Create a plot command. |
|
|
1659 |
|
|
1660 static tree_plot_command * |
|
|
1661 make_plot_command (token *tok, plot_limits *range, subplot_list *list) |
|
|
1662 { |
|
|
1663 if (range) |
|
|
1664 { |
|
|
1665 if (tok->pttype () == token::replot) |
|
|
1666 { |
|
|
1667 yyerror ("cannot specify new ranges with replot"); |
|
|
1668 return 0; |
|
|
1669 } |
|
|
1670 } |
|
|
1671 else if (! list && tok->pttype () != token::replot) |
|
|
1672 { |
|
|
1673 yyerror ("must have something to plot"); |
|
|
1674 return 0; |
|
|
1675 } |
|
|
1676 |
|
2857
|
1677 lexer_flags.plotting = false; |
|
|
1678 lexer_flags.past_plot_range = false; |
|
|
1679 lexer_flags.in_plot_range = false; |
|
|
1680 lexer_flags.in_plot_using = false; |
|
|
1681 lexer_flags.in_plot_style = false; |
|
1623
|
1682 |
|
|
1683 return new tree_plot_command (list, range, tok->pttype ()); |
|
|
1684 } |
|
|
1685 |
|
2533
|
1686 static tree_expression * |
|
|
1687 fold (tree_binary_expression *e) |
|
|
1688 { |
|
3110
|
1689 tree_expression *retval = e; |
|
|
1690 |
|
3292
|
1691 unwind_protect::begin_frame ("fold_binary_expression"); |
|
3110
|
1692 |
|
|
1693 unwind_protect_int (error_state); |
|
|
1694 |
|
3815
|
1695 unwind_protect_bool (discard_error_messages); |
|
|
1696 discard_error_messages = true; |
|
2533
|
1697 |
|
|
1698 tree_expression *op1 = e->lhs (); |
|
|
1699 tree_expression *op2 = e->rhs (); |
|
|
1700 |
|
|
1701 if (op1->is_constant () && op2->is_constant ()) |
|
|
1702 { |
|
2970
|
1703 octave_value tmp = e->rvalue (); |
|
2533
|
1704 |
|
3489
|
1705 if (! (error_state || warning_state)) |
|
2533
|
1706 { |
|
|
1707 tree_constant *tc_retval = new tree_constant (tmp); |
|
|
1708 |
|
4051
|
1709 OSSTREAM buf; |
|
2533
|
1710 |
|
|
1711 tree_print_code tpc (buf); |
|
|
1712 |
|
|
1713 e->accept (tpc); |
|
|
1714 |
|
4051
|
1715 buf << OSSTREAM_ENDS; |
|
|
1716 |
|
|
1717 tc_retval->stash_original_text (OSSTREAM_STR (buf)); |
|
|
1718 |
|
|
1719 OSSTREAM_FREEZE (buf); |
|
2533
|
1720 |
|
|
1721 delete e; |
|
|
1722 |
|
|
1723 retval = tc_retval; |
|
|
1724 } |
|
|
1725 } |
|
3110
|
1726 |
|
3292
|
1727 unwind_protect::run_frame ("fold_binary_expression"); |
|
|
1728 |
|
|
1729 return retval; |
|
|
1730 } |
|
|
1731 |
|
|
1732 static tree_expression * |
|
|
1733 fold (tree_unary_expression *e) |
|
|
1734 { |
|
|
1735 tree_expression *retval = e; |
|
|
1736 |
|
|
1737 unwind_protect::begin_frame ("fold_unary_expression"); |
|
|
1738 |
|
|
1739 unwind_protect_int (error_state); |
|
|
1740 |
|
3815
|
1741 unwind_protect_bool (discard_error_messages); |
|
|
1742 discard_error_messages = true; |
|
3292
|
1743 |
|
|
1744 tree_expression *op = e->operand (); |
|
|
1745 |
|
|
1746 if (op->is_constant ()) |
|
|
1747 { |
|
|
1748 octave_value tmp = e->rvalue (); |
|
|
1749 |
|
3489
|
1750 if (! (error_state || warning_state)) |
|
3292
|
1751 { |
|
|
1752 tree_constant *tc_retval = new tree_constant (tmp); |
|
|
1753 |
|
4051
|
1754 OSSTREAM buf; |
|
3292
|
1755 |
|
|
1756 tree_print_code tpc (buf); |
|
|
1757 |
|
|
1758 e->accept (tpc); |
|
|
1759 |
|
4051
|
1760 buf << OSSTREAM_ENDS; |
|
|
1761 |
|
|
1762 tc_retval->stash_original_text (OSSTREAM_STR (buf)); |
|
|
1763 |
|
|
1764 OSSTREAM_FREEZE (buf); |
|
3292
|
1765 |
|
|
1766 delete e; |
|
|
1767 |
|
|
1768 retval = tc_retval; |
|
|
1769 } |
|
|
1770 } |
|
|
1771 |
|
|
1772 unwind_protect::run_frame ("fold_unary_expression"); |
|
2533
|
1773 |
|
|
1774 return retval; |
|
|
1775 } |
|
|
1776 |
|
1623
|
1777 // Finish building a range. |
|
|
1778 |
|
|
1779 static tree_expression * |
|
|
1780 finish_colon_expression (tree_colon_expression *e) |
|
|
1781 { |
|
3110
|
1782 tree_expression *retval = e; |
|
|
1783 |
|
|
1784 unwind_protect::begin_frame ("finish_colon_expression"); |
|
|
1785 |
|
|
1786 unwind_protect_int (error_state); |
|
|
1787 |
|
3815
|
1788 unwind_protect_bool (discard_error_messages); |
|
|
1789 discard_error_messages = true; |
|
1623
|
1790 |
|
2533
|
1791 tree_expression *base = e->base (); |
|
|
1792 tree_expression *limit = e->limit (); |
|
|
1793 tree_expression *incr = e->increment (); |
|
|
1794 |
|
2970
|
1795 if (base) |
|
1623
|
1796 { |
|
2970
|
1797 if (limit) |
|
2533
|
1798 { |
|
2970
|
1799 if (base->is_constant () && limit->is_constant () |
|
|
1800 && (! incr || (incr && incr->is_constant ()))) |
|
|
1801 { |
|
|
1802 octave_value tmp = e->rvalue (); |
|
|
1803 |
|
3489
|
1804 if (! (error_state || warning_state)) |
|
2970
|
1805 { |
|
|
1806 tree_constant *tc_retval = new tree_constant (tmp); |
|
|
1807 |
|
4051
|
1808 OSSTREAM buf; |
|
2970
|
1809 |
|
|
1810 tree_print_code tpc (buf); |
|
|
1811 |
|
|
1812 e->accept (tpc); |
|
|
1813 |
|
4051
|
1814 buf << OSSTREAM_ENDS; |
|
|
1815 |
|
|
1816 tc_retval->stash_original_text (OSSTREAM_STR (buf)); |
|
|
1817 |
|
|
1818 OSSTREAM_FREEZE (buf); |
|
2970
|
1819 |
|
|
1820 delete e; |
|
|
1821 |
|
|
1822 retval = tc_retval; |
|
|
1823 } |
|
|
1824 } |
|
2533
|
1825 } |
|
|
1826 else |
|
2970
|
1827 { |
|
2990
|
1828 e->preserve_base (); |
|
|
1829 delete e; |
|
2970
|
1830 |
|
|
1831 // XXX FIXME XXX -- need to attempt constant folding here |
|
|
1832 // too (we need a generic way to do that). |
|
|
1833 retval = base; |
|
|
1834 } |
|
1623
|
1835 } |
|
|
1836 |
|
3110
|
1837 unwind_protect::run_frame ("finish_colon_expression"); |
|
|
1838 |
|
1623
|
1839 return retval; |
|
|
1840 } |
|
|
1841 |
|
1607
|
1842 // Make a constant. |
|
|
1843 |
|
2375
|
1844 static tree_constant * |
|
1607
|
1845 make_constant (int op, token *tok_val) |
|
|
1846 { |
|
|
1847 int l = tok_val->line (); |
|
|
1848 int c = tok_val->column (); |
|
|
1849 |
|
3216
|
1850 tree_constant *retval = 0; |
|
1607
|
1851 |
|
|
1852 switch (op) |
|
|
1853 { |
|
|
1854 case NUM: |
|
2533
|
1855 { |
|
2883
|
1856 octave_value tmp (tok_val->number ()); |
|
|
1857 retval = new tree_constant (tmp, l, c); |
|
2533
|
1858 retval->stash_original_text (tok_val->text_rep ()); |
|
|
1859 } |
|
1607
|
1860 break; |
|
|
1861 |
|
|
1862 case IMAG_NUM: |
|
|
1863 { |
|
2883
|
1864 octave_value tmp (Complex (0.0, tok_val->number ())); |
|
|
1865 retval = new tree_constant (tmp, l, c); |
|
1607
|
1866 retval->stash_original_text (tok_val->text_rep ()); |
|
|
1867 } |
|
|
1868 break; |
|
|
1869 |
|
4064
|
1870 case STRING: |
|
2883
|
1871 { |
|
|
1872 octave_value tmp (tok_val->text ()); |
|
|
1873 retval = new tree_constant (tmp, l, c); |
|
|
1874 } |
|
1607
|
1875 break; |
|
|
1876 |
|
|
1877 default: |
|
|
1878 panic_impossible (); |
|
|
1879 break; |
|
|
1880 } |
|
|
1881 |
|
|
1882 return retval; |
|
|
1883 } |
|
|
1884 |
|
666
|
1885 // Build a binary expression. |
|
|
1886 |
|
578
|
1887 static tree_expression * |
|
|
1888 make_binary_op (int op, tree_expression *op1, token *tok_val, |
|
|
1889 tree_expression *op2) |
|
|
1890 { |
|
2883
|
1891 octave_value::binary_op t = octave_value::unknown_binary_op; |
|
1623
|
1892 |
|
578
|
1893 switch (op) |
|
|
1894 { |
|
|
1895 case POW: |
|
3525
|
1896 t = octave_value::op_pow; |
|
578
|
1897 break; |
|
777
|
1898 |
|
578
|
1899 case EPOW: |
|
3525
|
1900 t = octave_value::op_el_pow; |
|
578
|
1901 break; |
|
777
|
1902 |
|
578
|
1903 case '+': |
|
3525
|
1904 t = octave_value::op_add; |
|
578
|
1905 break; |
|
777
|
1906 |
|
578
|
1907 case '-': |
|
3525
|
1908 t = octave_value::op_sub; |
|
578
|
1909 break; |
|
777
|
1910 |
|
578
|
1911 case '*': |
|
3525
|
1912 t = octave_value::op_mul; |
|
578
|
1913 break; |
|
777
|
1914 |
|
578
|
1915 case '/': |
|
3525
|
1916 t = octave_value::op_div; |
|
578
|
1917 break; |
|
777
|
1918 |
|
578
|
1919 case EMUL: |
|
3525
|
1920 t = octave_value::op_el_mul; |
|
578
|
1921 break; |
|
777
|
1922 |
|
578
|
1923 case EDIV: |
|
3525
|
1924 t = octave_value::op_el_div; |
|
578
|
1925 break; |
|
777
|
1926 |
|
578
|
1927 case LEFTDIV: |
|
3525
|
1928 t = octave_value::op_ldiv; |
|
578
|
1929 break; |
|
777
|
1930 |
|
578
|
1931 case ELEFTDIV: |
|
3525
|
1932 t = octave_value::op_el_ldiv; |
|
578
|
1933 break; |
|
777
|
1934 |
|
2899
|
1935 case LSHIFT: |
|
3525
|
1936 t = octave_value::op_lshift; |
|
2899
|
1937 break; |
|
|
1938 |
|
|
1939 case RSHIFT: |
|
3525
|
1940 t = octave_value::op_rshift; |
|
2899
|
1941 break; |
|
|
1942 |
|
578
|
1943 case EXPR_LT: |
|
3525
|
1944 t = octave_value::op_lt; |
|
578
|
1945 break; |
|
777
|
1946 |
|
578
|
1947 case EXPR_LE: |
|
3525
|
1948 t = octave_value::op_le; |
|
578
|
1949 break; |
|
777
|
1950 |
|
578
|
1951 case EXPR_EQ: |
|
3525
|
1952 t = octave_value::op_eq; |
|
578
|
1953 break; |
|
777
|
1954 |
|
578
|
1955 case EXPR_GE: |
|
3525
|
1956 t = octave_value::op_ge; |
|
578
|
1957 break; |
|
777
|
1958 |
|
578
|
1959 case EXPR_GT: |
|
3525
|
1960 t = octave_value::op_gt; |
|
578
|
1961 break; |
|
777
|
1962 |
|
578
|
1963 case EXPR_NE: |
|
3525
|
1964 t = octave_value::op_ne; |
|
578
|
1965 break; |
|
777
|
1966 |
|
578
|
1967 case EXPR_AND: |
|
3525
|
1968 t = octave_value::op_el_and; |
|
578
|
1969 break; |
|
777
|
1970 |
|
578
|
1971 case EXPR_OR: |
|
3525
|
1972 t = octave_value::op_el_or; |
|
4023
|
1973 if (Vwarn_precedence_change |
|
4024
|
1974 && op2->paren_count () == 0 && op2->is_binary_expression ()) |
|
4023
|
1975 { |
|
|
1976 tree_binary_expression *e |
|
|
1977 = dynamic_cast<tree_binary_expression *> (op2); |
|
|
1978 |
|
|
1979 if (e->op_type () == octave_value::op_el_and) |
|
|
1980 warning ("meaning may have changed due to change in precedence for & and | operators"); |
|
|
1981 } |
|
578
|
1982 break; |
|
777
|
1983 |
|
578
|
1984 default: |
|
|
1985 panic_impossible (); |
|
|
1986 break; |
|
|
1987 } |
|
|
1988 |
|
|
1989 int l = tok_val->line (); |
|
|
1990 int c = tok_val->column (); |
|
|
1991 |
|
2533
|
1992 tree_binary_expression *e |
|
|
1993 = new tree_binary_expression (op1, op2, l, c, t); |
|
1623
|
1994 |
|
2533
|
1995 return fold (e); |
|
578
|
1996 } |
|
|
1997 |
|
2375
|
1998 // Build a boolean expression. |
|
666
|
1999 |
|
578
|
2000 static tree_expression * |
|
2375
|
2001 make_boolean_op (int op, tree_expression *op1, token *tok_val, |
|
|
2002 tree_expression *op2) |
|
578
|
2003 { |
|
2375
|
2004 tree_boolean_expression::type t; |
|
|
2005 |
|
578
|
2006 switch (op) |
|
|
2007 { |
|
2375
|
2008 case EXPR_AND_AND: |
|
2805
|
2009 t = tree_boolean_expression::bool_and; |
|
578
|
2010 break; |
|
777
|
2011 |
|
2375
|
2012 case EXPR_OR_OR: |
|
2805
|
2013 t = tree_boolean_expression::bool_or; |
|
4023
|
2014 if (Vwarn_precedence_change |
|
4024
|
2015 && op2->paren_count () == 0 && op2->is_boolean_expression ()) |
|
4023
|
2016 { |
|
|
2017 tree_boolean_expression *e |
|
|
2018 = dynamic_cast<tree_boolean_expression *> (op2); |
|
|
2019 |
|
|
2020 if (e->op_type () == tree_boolean_expression::bool_and) |
|
|
2021 warning ("meaning may have changed due to change in precedence for && and || operators"); |
|
|
2022 } |
|
578
|
2023 break; |
|
777
|
2024 |
|
578
|
2025 default: |
|
|
2026 panic_impossible (); |
|
|
2027 break; |
|
|
2028 } |
|
|
2029 |
|
|
2030 int l = tok_val->line (); |
|
|
2031 int c = tok_val->column (); |
|
|
2032 |
|
2533
|
2033 tree_boolean_expression *e |
|
|
2034 = new tree_boolean_expression (op1, op2, l, c, t); |
|
2375
|
2035 |
|
2533
|
2036 return fold (e); |
|
578
|
2037 } |
|
|
2038 |
|
2375
|
2039 // Build a prefix expression. |
|
666
|
2040 |
|
578
|
2041 static tree_expression * |
|
2960
|
2042 make_prefix_op (int op, tree_expression *op1, token *tok_val) |
|
578
|
2043 { |
|
3203
|
2044 octave_value::unary_op t = octave_value::unknown_unary_op; |
|
2375
|
2045 |
|
578
|
2046 switch (op) |
|
|
2047 { |
|
2960
|
2048 case EXPR_NOT: |
|
3525
|
2049 t = octave_value::op_not; |
|
2960
|
2050 break; |
|
|
2051 |
|
|
2052 case '-': |
|
3525
|
2053 t = octave_value::op_uminus; |
|
2960
|
2054 break; |
|
|
2055 |
|
578
|
2056 case PLUS_PLUS: |
|
3525
|
2057 t = octave_value::op_incr; |
|
578
|
2058 break; |
|
777
|
2059 |
|
578
|
2060 case MINUS_MINUS: |
|
3525
|
2061 t = octave_value::op_decr; |
|
578
|
2062 break; |
|
777
|
2063 |
|
578
|
2064 default: |
|
|
2065 panic_impossible (); |
|
|
2066 break; |
|
|
2067 } |
|
|
2068 |
|
|
2069 int l = tok_val->line (); |
|
|
2070 int c = tok_val->column (); |
|
|
2071 |
|
3292
|
2072 tree_prefix_expression *e |
|
|
2073 = new tree_prefix_expression (op1, l, c, t); |
|
|
2074 |
|
|
2075 return fold (e); |
|
578
|
2076 } |
|
|
2077 |
|
2375
|
2078 // Build a postfix expression. |
|
666
|
2079 |
|
578
|
2080 static tree_expression * |
|
2960
|
2081 make_postfix_op (int op, tree_expression *op1, token *tok_val) |
|
578
|
2082 { |
|
3203
|
2083 octave_value::unary_op t = octave_value::unknown_unary_op; |
|
1623
|
2084 |
|
578
|
2085 switch (op) |
|
|
2086 { |
|
2960
|
2087 case QUOTE: |
|
3525
|
2088 t = octave_value::op_hermitian; |
|
2960
|
2089 break; |
|
|
2090 |
|
|
2091 case TRANSPOSE: |
|
3525
|
2092 t = octave_value::op_transpose; |
|
2960
|
2093 break; |
|
|
2094 |
|
2375
|
2095 case PLUS_PLUS: |
|
3525
|
2096 t = octave_value::op_incr; |
|
578
|
2097 break; |
|
777
|
2098 |
|
2375
|
2099 case MINUS_MINUS: |
|
3525
|
2100 t = octave_value::op_decr; |
|
578
|
2101 break; |
|
777
|
2102 |
|
578
|
2103 default: |
|
|
2104 panic_impossible (); |
|
|
2105 break; |
|
|
2106 } |
|
|
2107 |
|
|
2108 int l = tok_val->line (); |
|
|
2109 int c = tok_val->column (); |
|
|
2110 |
|
3292
|
2111 tree_postfix_expression *e |
|
|
2112 = new tree_postfix_expression (op1, l, c, t); |
|
|
2113 |
|
|
2114 return fold (e); |
|
1623
|
2115 } |
|
|
2116 |
|
|
2117 // Build an unwind-protect command. |
|
|
2118 |
|
|
2119 static tree_command * |
|
|
2120 make_unwind_command (token *unwind_tok, tree_statement_list *body, |
|
3665
|
2121 tree_statement_list *cleanup, token *end_tok, |
|
|
2122 octave_comment_list *lc, octave_comment_list *mc) |
|
1623
|
2123 { |
|
|
2124 tree_command *retval = 0; |
|
|
2125 |
|
2857
|
2126 if (end_token_ok (end_tok, token::unwind_protect_end)) |
|
1623
|
2127 { |
|
3665
|
2128 octave_comment_list *tc = octave_comment_buffer::get_comment (); |
|
|
2129 |
|
1623
|
2130 int l = unwind_tok->line (); |
|
|
2131 int c = unwind_tok->column (); |
|
|
2132 |
|
3665
|
2133 retval = new tree_unwind_protect_command (body, cleanup, |
|
|
2134 lc, mc, tc, l, c); |
|
1623
|
2135 } |
|
|
2136 |
|
|
2137 return retval; |
|
|
2138 } |
|
|
2139 |
|
|
2140 // Build a try-catch command. |
|
|
2141 |
|
|
2142 static tree_command * |
|
|
2143 make_try_command (token *try_tok, tree_statement_list *body, |
|
3665
|
2144 tree_statement_list *cleanup, token *end_tok, |
|
|
2145 octave_comment_list *lc, octave_comment_list *mc) |
|
1623
|
2146 { |
|
|
2147 tree_command *retval = 0; |
|
|
2148 |
|
2857
|
2149 if (end_token_ok (end_tok, token::try_catch_end)) |
|
1623
|
2150 { |
|
3665
|
2151 octave_comment_list *tc = octave_comment_buffer::get_comment (); |
|
|
2152 |
|
1623
|
2153 int l = try_tok->line (); |
|
|
2154 int c = try_tok->column (); |
|
|
2155 |
|
3665
|
2156 retval = new tree_try_catch_command (body, cleanup, |
|
|
2157 lc, mc, tc, l, c); |
|
1623
|
2158 } |
|
|
2159 |
|
|
2160 return retval; |
|
|
2161 } |
|
|
2162 |
|
|
2163 // Build a while command. |
|
|
2164 |
|
|
2165 static tree_command * |
|
|
2166 make_while_command (token *while_tok, tree_expression *expr, |
|
3665
|
2167 tree_statement_list *body, token *end_tok, |
|
|
2168 octave_comment_list *lc) |
|
1623
|
2169 { |
|
|
2170 tree_command *retval = 0; |
|
|
2171 |
|
|
2172 maybe_warn_assign_as_truth_value (expr); |
|
|
2173 |
|
2857
|
2174 if (end_token_ok (end_tok, token::while_end)) |
|
1623
|
2175 { |
|
3665
|
2176 octave_comment_list *tc = octave_comment_buffer::get_comment (); |
|
|
2177 |
|
1826
|
2178 lexer_flags.looping--; |
|
1623
|
2179 |
|
|
2180 int l = while_tok->line (); |
|
|
2181 int c = while_tok->column (); |
|
|
2182 |
|
3665
|
2183 retval = new tree_while_command (expr, body, lc, tc, l, c); |
|
1623
|
2184 } |
|
|
2185 |
|
|
2186 return retval; |
|
|
2187 } |
|
|
2188 |
|
3484
|
2189 // Build a do-until command. |
|
|
2190 |
|
|
2191 static tree_command * |
|
|
2192 make_do_until_command (token *do_tok, tree_statement_list *body, |
|
3665
|
2193 tree_expression *expr, octave_comment_list *lc) |
|
3484
|
2194 { |
|
|
2195 tree_command *retval = 0; |
|
|
2196 |
|
|
2197 maybe_warn_assign_as_truth_value (expr); |
|
|
2198 |
|
3665
|
2199 octave_comment_list *tc = octave_comment_buffer::get_comment (); |
|
|
2200 |
|
3484
|
2201 lexer_flags.looping--; |
|
|
2202 |
|
|
2203 int l = do_tok->line (); |
|
|
2204 int c = do_tok->column (); |
|
|
2205 |
|
3665
|
2206 retval = new tree_do_until_command (expr, body, lc, tc, l, c); |
|
3484
|
2207 |
|
|
2208 return retval; |
|
|
2209 } |
|
|
2210 |
|
1623
|
2211 // Build a for command. |
|
|
2212 |
|
|
2213 static tree_command * |
|
2970
|
2214 make_for_command (token *for_tok, tree_argument_list *lhs, |
|
1623
|
2215 tree_expression *expr, tree_statement_list *body, |
|
3665
|
2216 token *end_tok, octave_comment_list *lc) |
|
1623
|
2217 { |
|
|
2218 tree_command *retval = 0; |
|
|
2219 |
|
2857
|
2220 if (end_token_ok (end_tok, token::for_end)) |
|
1623
|
2221 { |
|
3665
|
2222 octave_comment_list *tc = octave_comment_buffer::get_comment (); |
|
|
2223 |
|
1826
|
2224 lexer_flags.looping--; |
|
1623
|
2225 |
|
|
2226 int l = for_tok->line (); |
|
|
2227 int c = for_tok->column (); |
|
|
2228 |
|
2970
|
2229 if (lhs->length () == 1) |
|
|
2230 { |
|
|
2231 tree_expression *tmp = lhs->remove_front (); |
|
|
2232 |
|
3665
|
2233 retval = new tree_simple_for_command (tmp, expr, body, |
|
|
2234 lc, tc, l, c); |
|
2970
|
2235 |
|
|
2236 delete lhs; |
|
|
2237 } |
|
|
2238 else |
|
3665
|
2239 retval = new tree_complex_for_command (lhs, expr, body, |
|
|
2240 lc, tc, l, c); |
|
1623
|
2241 } |
|
|
2242 |
|
|
2243 return retval; |
|
|
2244 } |
|
|
2245 |
|
|
2246 // Build a break command. |
|
|
2247 |
|
|
2248 static tree_command * |
|
|
2249 make_break_command (token *break_tok) |
|
|
2250 { |
|
|
2251 tree_command *retval = 0; |
|
|
2252 |
|
2620
|
2253 int l = break_tok->line (); |
|
|
2254 int c = break_tok->column (); |
|
|
2255 |
|
3489
|
2256 if (lexer_flags.looping || lexer_flags.defining_func |
|
3877
|
2257 || reading_script_file || evaluating_function_body |
|
|
2258 || evaluating_looping_command) |
|
2620
|
2259 retval = new tree_break_command (l, c); |
|
1623
|
2260 else |
|
2620
|
2261 retval = new tree_no_op_command ("break", l, c); |
|
1623
|
2262 |
|
|
2263 return retval; |
|
|
2264 } |
|
|
2265 |
|
|
2266 // Build a continue command. |
|
|
2267 |
|
|
2268 static tree_command * |
|
|
2269 make_continue_command (token *continue_tok) |
|
|
2270 { |
|
|
2271 tree_command *retval = 0; |
|
|
2272 |
|
2620
|
2273 int l = continue_tok->line (); |
|
|
2274 int c = continue_tok->column (); |
|
|
2275 |
|
3877
|
2276 if (lexer_flags.looping || evaluating_looping_command) |
|
2620
|
2277 retval = new tree_continue_command (l, c); |
|
1623
|
2278 else |
|
2620
|
2279 retval = new tree_no_op_command ("continue", l, c); |
|
1623
|
2280 |
|
|
2281 return retval; |
|
|
2282 } |
|
|
2283 |
|
|
2284 // Build a return command. |
|
|
2285 |
|
|
2286 static tree_command * |
|
|
2287 make_return_command (token *return_tok) |
|
|
2288 { |
|
|
2289 tree_command *retval = 0; |
|
|
2290 |
|
2620
|
2291 int l = return_tok->line (); |
|
|
2292 int c = return_tok->column (); |
|
|
2293 |
|
3489
|
2294 if (lexer_flags.defining_func || reading_script_file |
|
|
2295 || evaluating_function_body) |
|
2620
|
2296 retval = new tree_return_command (l, c); |
|
1623
|
2297 else |
|
2620
|
2298 retval = new tree_no_op_command ("return", l, c); |
|
1623
|
2299 |
|
|
2300 return retval; |
|
|
2301 } |
|
|
2302 |
|
|
2303 // Start an if command. |
|
|
2304 |
|
|
2305 static tree_if_command_list * |
|
|
2306 start_if_command (tree_expression *expr, tree_statement_list *list) |
|
|
2307 { |
|
|
2308 maybe_warn_assign_as_truth_value (expr); |
|
|
2309 |
|
|
2310 tree_if_clause *t = new tree_if_clause (expr, list); |
|
|
2311 |
|
|
2312 return new tree_if_command_list (t); |
|
|
2313 } |
|
|
2314 |
|
|
2315 // Finish an if command. |
|
|
2316 |
|
|
2317 static tree_if_command * |
|
|
2318 finish_if_command (token *if_tok, tree_if_command_list *list, |
|
3665
|
2319 token *end_tok, octave_comment_list *lc) |
|
1623
|
2320 { |
|
|
2321 tree_if_command *retval = 0; |
|
|
2322 |
|
2857
|
2323 if (end_token_ok (end_tok, token::if_end)) |
|
1623
|
2324 { |
|
3665
|
2325 octave_comment_list *tc = octave_comment_buffer::get_comment (); |
|
|
2326 |
|
1623
|
2327 int l = if_tok->line (); |
|
|
2328 int c = if_tok->column (); |
|
|
2329 |
|
3665
|
2330 retval = new tree_if_command (list, lc, tc, l, c); |
|
1623
|
2331 } |
|
|
2332 |
|
|
2333 return retval; |
|
|
2334 } |
|
|
2335 |
|
|
2336 // Build an elseif clause. |
|
|
2337 |
|
|
2338 static tree_if_clause * |
|
3665
|
2339 make_elseif_clause (tree_expression *expr, tree_statement_list *list, |
|
|
2340 octave_comment_list *lc) |
|
1623
|
2341 { |
|
|
2342 maybe_warn_assign_as_truth_value (expr); |
|
|
2343 |
|
3665
|
2344 return new tree_if_clause (expr, list, lc); |
|
1623
|
2345 } |
|
|
2346 |
|
2764
|
2347 // Finish a switch command. |
|
|
2348 |
|
|
2349 static tree_switch_command * |
|
|
2350 finish_switch_command (token *switch_tok, tree_expression *expr, |
|
3665
|
2351 tree_switch_case_list *list, token *end_tok, |
|
|
2352 octave_comment_list *lc) |
|
2764
|
2353 { |
|
|
2354 tree_switch_command *retval = 0; |
|
|
2355 |
|
2857
|
2356 if (end_token_ok (end_tok, token::switch_end)) |
|
2764
|
2357 { |
|
3665
|
2358 octave_comment_list *tc = octave_comment_buffer::get_comment (); |
|
|
2359 |
|
2764
|
2360 int l = switch_tok->line (); |
|
|
2361 int c = switch_tok->column (); |
|
|
2362 |
|
3665
|
2363 retval = new tree_switch_command (expr, list, lc, tc, l, c); |
|
2764
|
2364 } |
|
|
2365 |
|
|
2366 return retval; |
|
|
2367 } |
|
|
2368 |
|
|
2369 // Build a switch case. |
|
|
2370 |
|
|
2371 static tree_switch_case * |
|
3665
|
2372 make_switch_case (tree_expression *expr, tree_statement_list *list, |
|
|
2373 octave_comment_list *lc) |
|
2764
|
2374 { |
|
|
2375 maybe_warn_variable_switch_label (expr); |
|
|
2376 |
|
3665
|
2377 return new tree_switch_case (expr, list, lc); |
|
2764
|
2378 } |
|
|
2379 |
|
1623
|
2380 // Build an assignment to a variable. |
|
|
2381 |
|
|
2382 static tree_expression * |
|
2970
|
2383 make_assign_op (int op, tree_argument_list *lhs, token *eq_tok, |
|
|
2384 tree_expression *rhs) |
|
1623
|
2385 { |
|
2970
|
2386 tree_expression *retval = 0; |
|
|
2387 |
|
2883
|
2388 octave_value::assign_op t = octave_value::unknown_assign_op; |
|
|
2389 |
|
|
2390 switch (op) |
|
|
2391 { |
|
|
2392 case '=': |
|
3525
|
2393 t = octave_value::op_asn_eq; |
|
2883
|
2394 break; |
|
|
2395 |
|
|
2396 case ADD_EQ: |
|
3525
|
2397 t = octave_value::op_add_eq; |
|
2883
|
2398 break; |
|
|
2399 |
|
|
2400 case SUB_EQ: |
|
3525
|
2401 t = octave_value::op_sub_eq; |
|
2883
|
2402 break; |
|
|
2403 |
|
|
2404 case MUL_EQ: |
|
3525
|
2405 t = octave_value::op_mul_eq; |
|
2883
|
2406 break; |
|
|
2407 |
|
|
2408 case DIV_EQ: |
|
3525
|
2409 t = octave_value::op_div_eq; |
|
2883
|
2410 break; |
|
|
2411 |
|
3204
|
2412 case LEFTDIV_EQ: |
|
3525
|
2413 t = octave_value::op_ldiv_eq; |
|
3204
|
2414 break; |
|
|
2415 |
|
4018
|
2416 case POW_EQ: |
|
|
2417 t = octave_value::op_pow_eq; |
|
|
2418 break; |
|
|
2419 |
|
2899
|
2420 case LSHIFT_EQ: |
|
3525
|
2421 t = octave_value::op_lshift_eq; |
|
2899
|
2422 break; |
|
|
2423 |
|
|
2424 case RSHIFT_EQ: |
|
3525
|
2425 t = octave_value::op_rshift_eq; |
|
2899
|
2426 break; |
|
|
2427 |
|
2883
|
2428 case EMUL_EQ: |
|
3525
|
2429 t = octave_value::op_el_mul_eq; |
|
2883
|
2430 break; |
|
|
2431 |
|
|
2432 case EDIV_EQ: |
|
3525
|
2433 t = octave_value::op_el_div_eq; |
|
2883
|
2434 break; |
|
|
2435 |
|
3204
|
2436 case ELEFTDIV_EQ: |
|
3525
|
2437 t = octave_value::op_el_ldiv_eq; |
|
3204
|
2438 break; |
|
|
2439 |
|
4018
|
2440 case EPOW_EQ: |
|
|
2441 t = octave_value::op_el_pow_eq; |
|
|
2442 break; |
|
|
2443 |
|
2883
|
2444 case AND_EQ: |
|
3525
|
2445 t = octave_value::op_el_and_eq; |
|
2883
|
2446 break; |
|
|
2447 |
|
|
2448 case OR_EQ: |
|
3525
|
2449 t = octave_value::op_el_or_eq; |
|
2883
|
2450 break; |
|
|
2451 |
|
|
2452 default: |
|
|
2453 panic_impossible (); |
|
|
2454 break; |
|
|
2455 } |
|
|
2456 |
|
1623
|
2457 int l = eq_tok->line (); |
|
|
2458 int c = eq_tok->column (); |
|
|
2459 |
|
2970
|
2460 if (lhs->length () == 1) |
|
666
|
2461 { |
|
2970
|
2462 tree_expression *tmp = lhs->remove_front (); |
|
|
2463 |
|
|
2464 retval = new tree_simple_assignment (tmp, rhs, false, l, c, t); |
|
|
2465 |
|
|
2466 delete lhs; |
|
666
|
2467 } |
|
|
2468 else |
|
3208
|
2469 return new tree_multi_assignment (lhs, rhs, false, l, c, t); |
|
666
|
2470 |
|
|
2471 return retval; |
|
|
2472 } |
|
751
|
2473 |
|
1623
|
2474 // Begin defining a function. |
|
|
2475 |
|
2891
|
2476 static octave_user_function * |
|
|
2477 start_function (tree_parameter_list *param_list, tree_statement_list *body) |
|
1623
|
2478 { |
|
|
2479 body->mark_as_function_body (); |
|
|
2480 |
|
2891
|
2481 // We'll fill in the return list later. |
|
|
2482 |
|
|
2483 octave_user_function *fcn |
|
|
2484 = new octave_user_function (param_list, 0, body, curr_sym_tab); |
|
1623
|
2485 |
|
3665
|
2486 if (fcn) |
|
|
2487 { |
|
|
2488 octave_comment_list *tc = octave_comment_buffer::get_comment (); |
|
|
2489 |
|
|
2490 fcn->stash_trailing_comment (tc); |
|
|
2491 } |
|
|
2492 |
|
1623
|
2493 return fcn; |
|
|
2494 } |
|
|
2495 |
|
|
2496 // Do most of the work for defining a function. |
|
|
2497 |
|
2891
|
2498 static octave_user_function * |
|
|
2499 frob_function (tree_identifier *id, octave_user_function *fcn) |
|
1623
|
2500 { |
|
3523
|
2501 std::string id_name = id->name (); |
|
1623
|
2502 |
|
|
2503 // If input is coming from a file, issue a warning if the name of |
|
|
2504 // the file does not match the name of the function stated in the |
|
|
2505 // file. Matlab doesn't provide a diagnostic (it ignores the stated |
|
|
2506 // name). |
|
|
2507 |
|
|
2508 fcn->stash_function_name (id_name); |
|
|
2509 |
|
|
2510 if (reading_fcn_file) |
|
|
2511 { |
|
1755
|
2512 if (curr_fcn_file_name != id_name) |
|
1623
|
2513 { |
|
2166
|
2514 if (Vwarn_function_name_clash) |
|
1623
|
2515 warning ("function name `%s' does not agree with function\ |
|
1755
|
2516 file name `%s'", id_name.c_str (), curr_fcn_file_full_name.c_str ()); |
|
1623
|
2517 |
|
4009
|
2518 fbi_sym_tab->rename (id_name, curr_fcn_file_name); |
|
1623
|
2519 |
|
|
2520 if (error_state) |
|
|
2521 return 0; |
|
|
2522 |
|
|
2523 id_name = id->name (); |
|
|
2524 } |
|
|
2525 |
|
3712
|
2526 octave_time now; |
|
3162
|
2527 |
|
1623
|
2528 fcn->stash_function_name (id_name); |
|
|
2529 fcn->stash_fcn_file_name (); |
|
3162
|
2530 fcn->stash_fcn_file_time (now); |
|
1623
|
2531 fcn->mark_as_system_fcn_file (); |
|
3162
|
2532 |
|
|
2533 if (Vwarn_future_time_stamp) |
|
|
2534 { |
|
3523
|
2535 std::string nm = fcn->fcn_file_name (); |
|
3162
|
2536 |
|
|
2537 file_stat fs (nm); |
|
|
2538 |
|
|
2539 if (fs && fs.is_newer (now)) |
|
|
2540 warning ("time stamp for `%s' is in the future", nm.c_str ()); |
|
|
2541 } |
|
1623
|
2542 } |
|
|
2543 else if (! (input_from_tmp_history_file || input_from_startup_file) |
|
|
2544 && reading_script_file |
|
1755
|
2545 && curr_fcn_file_name == id_name) |
|
1623
|
2546 { |
|
|
2547 warning ("function `%s' defined within script file `%s'", |
|
1755
|
2548 id_name.c_str (), curr_fcn_file_full_name.c_str ()); |
|
1623
|
2549 } |
|
|
2550 |
|
|
2551 top_level_sym_tab->clear (id_name); |
|
|
2552 |
|
4009
|
2553 symbol_record *sr = fbi_sym_tab->lookup (id_name); |
|
2791
|
2554 |
|
|
2555 if (sr) |
|
|
2556 fcn->stash_symtab_ptr (sr); |
|
|
2557 else |
|
|
2558 panic_impossible (); |
|
|
2559 |
|
3016
|
2560 id->define (fcn, symbol_record::USER_FUNCTION); |
|
1755
|
2561 |
|
1623
|
2562 id->document (help_buf); |
|
|
2563 |
|
3844
|
2564 help_buf.resize (0); |
|
|
2565 |
|
1623
|
2566 return fcn; |
|
|
2567 } |
|
|
2568 |
|
|
2569 // Finish defining a function. |
|
|
2570 |
|
2891
|
2571 static octave_user_function * |
|
3665
|
2572 finish_function (tree_identifier *id, octave_user_function *fcn, |
|
|
2573 octave_comment_list *lc) |
|
1623
|
2574 { |
|
2883
|
2575 tree_parameter_list *tpl = new tree_parameter_list (id); |
|
1623
|
2576 |
|
|
2577 tpl->mark_as_formal_parameters (); |
|
|
2578 |
|
3665
|
2579 fcn->stash_leading_comment (lc); |
|
|
2580 |
|
1623
|
2581 return fcn->define_ret_list (tpl); |
|
|
2582 } |
|
|
2583 |
|
|
2584 // Finish defining a function a different way. |
|
|
2585 |
|
2891
|
2586 static octave_user_function * |
|
3665
|
2587 finish_function (tree_parameter_list *ret_list, |
|
|
2588 octave_user_function *fcn, octave_comment_list *lc) |
|
1623
|
2589 { |
|
|
2590 ret_list->mark_as_formal_parameters (); |
|
|
2591 |
|
3665
|
2592 fcn->stash_leading_comment (lc); |
|
|
2593 |
|
1623
|
2594 return fcn->define_ret_list (ret_list); |
|
|
2595 } |
|
|
2596 |
|
2883
|
2597 static void |
|
|
2598 recover_from_parsing_function (void) |
|
|
2599 { |
|
3903
|
2600 if (! symtab_context) |
|
|
2601 panic_impossible (); |
|
|
2602 |
|
|
2603 curr_sym_tab = symtab_context; |
|
|
2604 symtab_context = 0; |
|
2883
|
2605 |
|
|
2606 lexer_flags.defining_func = false; |
|
|
2607 lexer_flags.beginning_of_function = false; |
|
|
2608 lexer_flags.parsed_function_name = false; |
|
|
2609 lexer_flags.looking_at_return_list = false; |
|
|
2610 lexer_flags.looking_at_parameter_list = false; |
|
|
2611 } |
|
|
2612 |
|
2846
|
2613 // Make an index expression. |
|
|
2614 |
|
751
|
2615 static tree_index_expression * |
|
3929
|
2616 make_index_expression (tree_expression *expr, tree_argument_list *args, |
|
3933
|
2617 char type) |
|
751
|
2618 { |
|
|
2619 tree_index_expression *retval = 0; |
|
|
2620 |
|
2970
|
2621 int l = expr->line (); |
|
|
2622 int c = expr->column (); |
|
|
2623 |
|
|
2624 expr->mark_postfix_indexed (); |
|
|
2625 |
|
3933
|
2626 if (expr->is_index_expression ()) |
|
|
2627 { |
|
|
2628 tree_index_expression *tmp = static_cast<tree_index_expression *> (expr); |
|
|
2629 |
|
|
2630 tmp->append (args, type); |
|
|
2631 |
|
|
2632 retval = tmp; |
|
|
2633 } |
|
|
2634 else |
|
|
2635 retval = new tree_index_expression (expr, args, l, c, type); |
|
2970
|
2636 |
|
|
2637 return retval; |
|
|
2638 } |
|
|
2639 |
|
|
2640 // Make an indirect reference expression. |
|
|
2641 |
|
3930
|
2642 static tree_index_expression * |
|
3523
|
2643 make_indirect_ref (tree_expression *expr, const std::string& elt) |
|
2970
|
2644 { |
|
3930
|
2645 tree_index_expression *retval = 0; |
|
2970
|
2646 |
|
|
2647 int l = expr->line (); |
|
|
2648 int c = expr->column (); |
|
|
2649 |
|
3933
|
2650 if (expr->is_index_expression ()) |
|
|
2651 { |
|
|
2652 tree_index_expression *tmp = static_cast<tree_index_expression *> (expr); |
|
|
2653 |
|
|
2654 tmp->append (elt); |
|
|
2655 |
|
|
2656 retval = tmp; |
|
|
2657 } |
|
|
2658 else |
|
|
2659 retval = new tree_index_expression (expr, elt, l, c); |
|
2970
|
2660 |
|
|
2661 lexer_flags.looking_at_indirect_ref = false; |
|
751
|
2662 |
|
|
2663 return retval; |
|
|
2664 } |
|
1511
|
2665 |
|
4131
|
2666 // Make an indirect reference expression with dynamic field name. |
|
|
2667 |
|
|
2668 static tree_index_expression * |
|
|
2669 make_indirect_ref (tree_expression *expr, tree_expression *elt) |
|
|
2670 { |
|
|
2671 tree_index_expression *retval = 0; |
|
|
2672 |
|
|
2673 int l = expr->line (); |
|
|
2674 int c = expr->column (); |
|
|
2675 |
|
|
2676 if (expr->is_index_expression ()) |
|
|
2677 { |
|
|
2678 tree_index_expression *tmp = static_cast<tree_index_expression *> (expr); |
|
|
2679 |
|
|
2680 tmp->append (elt); |
|
|
2681 |
|
|
2682 retval = tmp; |
|
|
2683 } |
|
|
2684 else |
|
|
2685 retval = new tree_index_expression (expr, elt, l, c); |
|
|
2686 |
|
|
2687 lexer_flags.looking_at_indirect_ref = false; |
|
|
2688 |
|
|
2689 return retval; |
|
|
2690 } |
|
|
2691 |
|
2846
|
2692 // Make a declaration command. |
|
|
2693 |
|
|
2694 static tree_decl_command * |
|
|
2695 make_decl_command (int tok, token *tok_val, tree_decl_init_list *lst) |
|
|
2696 { |
|
|
2697 tree_decl_command *retval = 0; |
|
|
2698 |
|
|
2699 int l = tok_val->line (); |
|
|
2700 int c = tok_val->column (); |
|
|
2701 |
|
|
2702 switch (tok) |
|
|
2703 { |
|
|
2704 case GLOBAL: |
|
|
2705 retval = new tree_global_command (lst, l, c); |
|
|
2706 break; |
|
|
2707 |
|
|
2708 case STATIC: |
|
|
2709 if (lexer_flags.defining_func) |
|
|
2710 retval = new tree_static_command (lst, l, c); |
|
|
2711 else |
|
|
2712 { |
|
|
2713 if (reading_script_file) |
|
|
2714 warning ("ignoring static declaration near line %d of file `%s'", |
|
|
2715 l, curr_fcn_file_full_name.c_str ()); |
|
|
2716 else |
|
|
2717 warning ("ignoring static declaration near line %d", l); |
|
|
2718 } |
|
|
2719 break; |
|
|
2720 |
|
|
2721 default: |
|
|
2722 panic_impossible (); |
|
|
2723 break; |
|
|
2724 } |
|
|
2725 |
|
|
2726 return retval; |
|
|
2727 } |
|
|
2728 |
|
1623
|
2729 // Finish building a matrix list. |
|
|
2730 |
|
|
2731 static tree_expression * |
|
1829
|
2732 finish_matrix (tree_matrix *m) |
|
1623
|
2733 { |
|
3110
|
2734 tree_expression *retval = m; |
|
|
2735 |
|
|
2736 unwind_protect::begin_frame ("finish_matrix"); |
|
|
2737 |
|
|
2738 unwind_protect_int (error_state); |
|
|
2739 |
|
3815
|
2740 unwind_protect_bool (discard_error_messages); |
|
|
2741 discard_error_messages = true; |
|
1623
|
2742 |
|
2533
|
2743 if (m->all_elements_are_constant ()) |
|
1829
|
2744 { |
|
2970
|
2745 octave_value tmp = m->rvalue (); |
|
1623
|
2746 |
|
3489
|
2747 if (! (error_state || warning_state)) |
|
2533
|
2748 { |
|
|
2749 tree_constant *tc_retval = new tree_constant (tmp); |
|
|
2750 |
|
4051
|
2751 OSSTREAM buf; |
|
2533
|
2752 |
|
|
2753 tree_print_code tpc (buf); |
|
|
2754 |
|
|
2755 m->accept (tpc); |
|
|
2756 |
|
4051
|
2757 buf << OSSTREAM_ENDS; |
|
|
2758 |
|
|
2759 tc_retval->stash_original_text (OSSTREAM_STR (buf)); |
|
|
2760 |
|
|
2761 OSSTREAM_FREEZE (buf); |
|
2533
|
2762 |
|
|
2763 delete m; |
|
|
2764 |
|
|
2765 retval = tc_retval; |
|
|
2766 } |
|
1623
|
2767 } |
|
3110
|
2768 |
|
|
2769 unwind_protect::run_frame ("finish_matrix"); |
|
1623
|
2770 |
|
|
2771 return retval; |
|
|
2772 } |
|
|
2773 |
|
3351
|
2774 // Finish building a cell list. |
|
|
2775 |
|
|
2776 static tree_expression * |
|
|
2777 finish_cell (tree_cell *c) |
|
|
2778 { |
|
|
2779 // For now, this doesn't do anything. |
|
|
2780 |
|
|
2781 return c; |
|
|
2782 } |
|
|
2783 |
|
1511
|
2784 static void |
|
|
2785 maybe_warn_missing_semi (tree_statement_list *t) |
|
|
2786 { |
|
2166
|
2787 if (lexer_flags.defining_func && Vwarn_missing_semicolon) |
|
1511
|
2788 { |
|
|
2789 tree_statement *tmp = t->rear(); |
|
1607
|
2790 |
|
1511
|
2791 if (tmp->is_expression ()) |
|
1607
|
2792 warning ("missing semicolon near line %d, column %d in file `%s'", |
|
1755
|
2793 tmp->line (), tmp->column (), |
|
|
2794 curr_fcn_file_full_name.c_str ()); |
|
1511
|
2795 } |
|
|
2796 } |
|
1994
|
2797 |
|
2525
|
2798 static void |
|
|
2799 set_stmt_print_flag (tree_statement_list *list, char sep, |
|
|
2800 bool warn_missing_semi) |
|
|
2801 { |
|
|
2802 switch (sep) |
|
|
2803 { |
|
|
2804 case ';': |
|
|
2805 { |
|
|
2806 tree_statement *tmp = list->rear (); |
|
|
2807 tmp->set_print_flag (0); |
|
|
2808 } |
|
|
2809 break; |
|
|
2810 |
|
|
2811 case 0: |
|
|
2812 case ',': |
|
|
2813 case '\n': |
|
|
2814 if (warn_missing_semi) |
|
|
2815 maybe_warn_missing_semi (list); |
|
|
2816 break; |
|
|
2817 |
|
|
2818 default: |
|
|
2819 warning ("unrecognized separator type!"); |
|
|
2820 break; |
|
|
2821 } |
|
|
2822 } |
|
|
2823 |
|
3021
|
2824 void |
|
|
2825 parse_and_execute (FILE *f) |
|
|
2826 { |
|
|
2827 unwind_protect::begin_frame ("parse_and_execute"); |
|
3880
|
2828 |
|
3021
|
2829 YY_BUFFER_STATE old_buf = current_buffer (); |
|
|
2830 YY_BUFFER_STATE new_buf = create_buffer (f); |
|
|
2831 |
|
|
2832 unwind_protect::add (restore_input_buffer, old_buf); |
|
|
2833 unwind_protect::add (delete_input_buffer, new_buf); |
|
|
2834 |
|
|
2835 switch_to_buffer (new_buf); |
|
|
2836 |
|
|
2837 unwind_protect_bool (line_editing); |
|
|
2838 unwind_protect_bool (input_from_command_line_file); |
|
3880
|
2839 unwind_protect_bool (get_input_from_eval_string); |
|
3883
|
2840 unwind_protect_bool (parser_end_of_input); |
|
3021
|
2841 |
|
|
2842 line_editing = false; |
|
|
2843 input_from_command_line_file = false; |
|
3880
|
2844 get_input_from_eval_string = false; |
|
3883
|
2845 parser_end_of_input = false; |
|
3021
|
2846 |
|
|
2847 unwind_protect_ptr (curr_sym_tab); |
|
|
2848 |
|
|
2849 int retval; |
|
|
2850 do |
|
|
2851 { |
|
|
2852 reset_parser (); |
|
|
2853 |
|
|
2854 retval = yyparse (); |
|
|
2855 |
|
3883
|
2856 if (retval == 0) |
|
|
2857 { |
|
|
2858 if (global_command) |
|
3021
|
2859 { |
|
3883
|
2860 global_command->eval (); |
|
|
2861 |
|
|
2862 delete global_command; |
|
|
2863 |
|
|
2864 global_command = 0; |
|
|
2865 |
|
4171
|
2866 OCTAVE_QUIT; |
|
|
2867 |
|
3883
|
2868 bool quit = (tree_return_command::returning |
|
|
2869 || tree_break_command::breaking); |
|
|
2870 |
|
|
2871 if (tree_return_command::returning) |
|
|
2872 tree_return_command::returning = 0; |
|
|
2873 |
|
|
2874 if (tree_break_command::breaking) |
|
|
2875 tree_break_command::breaking--; |
|
|
2876 |
|
|
2877 if (error_state) |
|
|
2878 { |
|
|
2879 error ("near line %d of file `%s'", input_line_number, |
|
|
2880 curr_fcn_file_full_name.c_str ()); |
|
|
2881 |
|
|
2882 break; |
|
|
2883 } |
|
|
2884 |
|
|
2885 if (quit) |
|
|
2886 break; |
|
3021
|
2887 } |
|
3883
|
2888 else if (parser_end_of_input) |
|
3021
|
2889 break; |
|
3883
|
2890 } |
|
3021
|
2891 } |
|
|
2892 while (retval == 0); |
|
|
2893 |
|
|
2894 unwind_protect::run_frame ("parse_and_execute"); |
|
|
2895 } |
|
|
2896 |
|
|
2897 static void |
|
|
2898 safe_fclose (void *f) |
|
|
2899 { |
|
3765
|
2900 // XXX FIXME XXX -- comments at the end of an input file are |
|
|
2901 // discarded (otherwise, they would be appended to the next |
|
|
2902 // statement, possibly from the command line or another file, which |
|
|
2903 // can be quite confusing). |
|
|
2904 |
|
|
2905 octave_comment_buffer::get_comment (); |
|
|
2906 |
|
3021
|
2907 if (f) |
|
|
2908 fclose (static_cast<FILE *> (f)); |
|
|
2909 } |
|
|
2910 |
|
|
2911 void |
|
3523
|
2912 parse_and_execute (const std::string& s, bool verbose, const char *warn_for) |
|
3021
|
2913 { |
|
|
2914 unwind_protect::begin_frame ("parse_and_execute_2"); |
|
|
2915 |
|
|
2916 unwind_protect_bool (reading_script_file); |
|
|
2917 unwind_protect_str (curr_fcn_file_full_name); |
|
|
2918 |
|
|
2919 reading_script_file = true; |
|
|
2920 curr_fcn_file_full_name = s; |
|
|
2921 |
|
|
2922 FILE *f = get_input_from_file (s, 0); |
|
|
2923 |
|
|
2924 if (f) |
|
|
2925 { |
|
|
2926 unwind_protect::add (safe_fclose, f); |
|
|
2927 |
|
|
2928 unwind_protect_int (input_line_number); |
|
|
2929 unwind_protect_int (current_input_column); |
|
|
2930 |
|
|
2931 input_line_number = 0; |
|
|
2932 current_input_column = 1; |
|
|
2933 |
|
|
2934 if (verbose) |
|
|
2935 { |
|
3531
|
2936 std::cout << "reading commands from " << s << " ... "; |
|
3021
|
2937 reading_startup_message_printed = true; |
|
3531
|
2938 std::cout.flush (); |
|
3021
|
2939 } |
|
|
2940 |
|
|
2941 parse_and_execute (f); |
|
|
2942 |
|
|
2943 if (verbose) |
|
3538
|
2944 std::cout << "done." << std::endl; |
|
3021
|
2945 } |
|
|
2946 else if (warn_for) |
|
|
2947 error ("%s: unable to open file `%s'", warn_for, s.c_str ()); |
|
|
2948 |
|
|
2949 unwind_protect::run_frame ("parse_and_execute_2"); |
|
|
2950 } |
|
|
2951 |
|
|
2952 static bool |
|
3523
|
2953 looks_like_octave_copyright (const std::string& s) |
|
3021
|
2954 { |
|
|
2955 bool retval = false; |
|
|
2956 |
|
3523
|
2957 std::string t = s.substr (0, 14); |
|
3427
|
2958 |
|
|
2959 if (t == "Copyright (C) ") |
|
3021
|
2960 { |
|
|
2961 size_t pos = s.find ('\n'); |
|
|
2962 |
|
|
2963 if (pos != NPOS) |
|
|
2964 { |
|
|
2965 pos = s.find ('\n', pos + 1); |
|
|
2966 |
|
|
2967 if (pos != NPOS) |
|
|
2968 { |
|
|
2969 pos++; |
|
|
2970 |
|
3427
|
2971 t = s.substr (pos, 28); |
|
|
2972 |
|
|
2973 if (t == "This file is part of Octave." |
|
|
2974 || t == "This program is free softwar") |
|
3021
|
2975 retval = true; |
|
|
2976 } |
|
|
2977 } |
|
|
2978 } |
|
|
2979 |
|
|
2980 return retval; |
|
|
2981 } |
|
|
2982 |
|
|
2983 // Eat whitespace and comments from FFILE, returning the text of the |
|
|
2984 // comments read if it doesn't look like a copyright notice. If |
|
|
2985 // IN_PARTS, consider each block of comments separately; otherwise, |
|
|
2986 // grab them all at once. If UPDATE_POS is TRUE, line and column |
|
3665
|
2987 // number information is updated. If SAVE_COPYRIGHT is TRUE, then |
|
|
2988 // comments that are recognized as a copyright notice are saved in the |
|
|
2989 // comment buffer. |
|
3021
|
2990 |
|
|
2991 // XXX FIXME XXX -- grab_help_text() in lex.l duplicates some of this |
|
|
2992 // code! |
|
|
2993 |
|
3536
|
2994 static std::string |
|
3665
|
2995 gobble_leading_white_space (FILE *ffile, bool in_parts, |
|
|
2996 bool update_pos, bool save_copyright) |
|
3021
|
2997 { |
|
3523
|
2998 std::string help_txt; |
|
3021
|
2999 |
|
3802
|
3000 // TRUE means we have already seen the first block of comments. |
|
3021
|
3001 bool first_comments_seen = false; |
|
3802
|
3002 |
|
|
3003 // TRUE means we are at the beginning of a comment block. |
|
3021
|
3004 bool begin_comment = false; |
|
3802
|
3005 |
|
|
3006 // TRUE means we have already cached the help text. |
|
3021
|
3007 bool have_help_text = false; |
|
3802
|
3008 |
|
|
3009 // TRUE means we are currently reading a comment block. |
|
3021
|
3010 bool in_comment = false; |
|
3802
|
3011 |
|
|
3012 // TRUE means we should discard the first space from the input |
|
|
3013 // (used to strip leading spaces from the help text). |
|
3427
|
3014 bool discard_space = true; |
|
3802
|
3015 |
|
3021
|
3016 int c; |
|
|
3017 |
|
|
3018 while ((c = getc (ffile)) != EOF) |
|
|
3019 { |
|
|
3020 if (update_pos) |
|
|
3021 current_input_column++; |
|
|
3022 |
|
|
3023 if (begin_comment) |
|
|
3024 { |
|
|
3025 if (c == '%' || c == '#') |
|
|
3026 continue; |
|
3427
|
3027 else if (discard_space && c == ' ') |
|
|
3028 { |
|
|
3029 discard_space = false; |
|
|
3030 continue; |
|
|
3031 } |
|
3021
|
3032 else |
|
|
3033 begin_comment = false; |
|
|
3034 } |
|
|
3035 |
|
|
3036 if (in_comment) |
|
|
3037 { |
|
|
3038 if (! have_help_text) |
|
|
3039 { |
|
|
3040 first_comments_seen = true; |
|
|
3041 help_txt += (char) c; |
|
|
3042 } |
|
|
3043 |
|
|
3044 if (c == '\n') |
|
|
3045 { |
|
|
3046 if (update_pos) |
|
|
3047 { |
|
|
3048 input_line_number++; |
|
|
3049 current_input_column = 0; |
|
|
3050 } |
|
3427
|
3051 |
|
3021
|
3052 in_comment = false; |
|
3427
|
3053 discard_space = true; |
|
3021
|
3054 |
|
|
3055 if (in_parts) |
|
|
3056 { |
|
|
3057 if ((c = getc (ffile)) != EOF) |
|
|
3058 { |
|
|
3059 if (update_pos) |
|
|
3060 current_input_column--; |
|
|
3061 ungetc (c, ffile); |
|
|
3062 if (c == '\n') |
|
|
3063 break; |
|
|
3064 } |
|
|
3065 else |
|
|
3066 break; |
|
|
3067 } |
|
|
3068 } |
|
|
3069 } |
|
|
3070 else |
|
|
3071 { |
|
|
3072 switch (c) |
|
|
3073 { |
|
|
3074 case ' ': |
|
|
3075 case '\t': |
|
|
3076 if (first_comments_seen) |
|
|
3077 have_help_text = true; |
|
|
3078 break; |
|
|
3079 |
|
3802
|
3080 case '%': |
|
|
3081 case '#': |
|
|
3082 begin_comment = true; |
|
|
3083 in_comment = true; |
|
|
3084 break; |
|
|
3085 |
|
3021
|
3086 case '\n': |
|
|
3087 if (first_comments_seen) |
|
|
3088 have_help_text = true; |
|
|
3089 if (update_pos) |
|
|
3090 { |
|
|
3091 input_line_number++; |
|
|
3092 current_input_column = 0; |
|
|
3093 } |
|
|
3094 continue; |
|
|
3095 |
|
3802
|
3096 case '\r': |
|
|
3097 c = getc (ffile); |
|
|
3098 if (update_pos) |
|
|
3099 current_input_column++; |
|
|
3100 if (c == EOF) |
|
|
3101 goto done; |
|
|
3102 else if (c == '\n') |
|
|
3103 { |
|
|
3104 if (first_comments_seen) |
|
|
3105 have_help_text = true; |
|
|
3106 if (update_pos) |
|
|
3107 { |
|
|
3108 input_line_number++; |
|
|
3109 current_input_column = 0; |
|
|
3110 } |
|
|
3111 continue; |
|
|
3112 } |
|
|
3113 |
|
|
3114 // Fall through... |
|
3021
|
3115 |
|
|
3116 default: |
|
|
3117 if (update_pos) |
|
|
3118 current_input_column--; |
|
|
3119 ungetc (c, ffile); |
|
|
3120 goto done; |
|
|
3121 } |
|
|
3122 } |
|
|
3123 } |
|
|
3124 |
|
|
3125 done: |
|
|
3126 |
|
|
3127 if (! help_txt.empty ()) |
|
|
3128 { |
|
3665
|
3129 if (looks_like_octave_copyright (help_txt)) |
|
|
3130 { |
|
|
3131 if (save_copyright) |
|
|
3132 octave_comment_buffer::append (help_txt); |
|
|
3133 |
|
|
3134 help_txt.resize (0); |
|
|
3135 } |
|
3021
|
3136 |
|
|
3137 if (in_parts && help_txt.empty ()) |
|
3665
|
3138 help_txt = gobble_leading_white_space (ffile, in_parts, |
|
|
3139 update_pos, false); |
|
3021
|
3140 } |
|
|
3141 |
|
|
3142 return help_txt; |
|
|
3143 } |
|
|
3144 |
|
3536
|
3145 std::string |
|
3523
|
3146 get_help_from_file (const std::string& path) |
|
3021
|
3147 { |
|
3523
|
3148 std::string retval; |
|
3021
|
3149 |
|
|
3150 if (! path.empty ()) |
|
|
3151 { |
|
|
3152 FILE *fptr = fopen (path.c_str (), "r"); |
|
|
3153 |
|
|
3154 if (fptr) |
|
|
3155 { |
|
|
3156 unwind_protect::add (safe_fclose, (void *) fptr); |
|
|
3157 |
|
3665
|
3158 retval = gobble_leading_white_space (fptr, true, true, false); |
|
3021
|
3159 |
|
|
3160 unwind_protect::run (); |
|
|
3161 } |
|
|
3162 } |
|
|
3163 |
|
|
3164 return retval; |
|
|
3165 } |
|
|
3166 |
|
|
3167 static int |
|
|
3168 is_function_file (FILE *ffile) |
|
|
3169 { |
|
|
3170 int status = 0; |
|
|
3171 |
|
|
3172 long pos = ftell (ffile); |
|
|
3173 |
|
3665
|
3174 gobble_leading_white_space (ffile, false, false, false); |
|
3021
|
3175 |
|
|
3176 char buf [10]; |
|
|
3177 fgets (buf, 10, ffile); |
|
|
3178 int len = strlen (buf); |
|
|
3179 if (len > 8 && strncmp (buf, "function", 8) == 0 |
|
|
3180 && ! (isalnum (buf[8]) || buf[8] == '_')) |
|
|
3181 status = 1; |
|
|
3182 |
|
|
3183 fseek (ffile, pos, SEEK_SET); |
|
|
3184 |
|
|
3185 return status; |
|
|
3186 } |
|
|
3187 |
|
|
3188 static void |
|
|
3189 restore_command_history (void *) |
|
|
3190 { |
|
|
3191 command_history::ignore_entries (! Vsaving_history); |
|
|
3192 } |
|
|
3193 |
|
|
3194 static void |
|
|
3195 restore_input_stream (void *f) |
|
|
3196 { |
|
|
3197 command_editor::set_input_stream (static_cast<FILE *> (f)); |
|
|
3198 } |
|
|
3199 |
|
3180
|
3200 static void |
|
|
3201 clear_current_script_file_name (void *) |
|
|
3202 { |
|
|
3203 bind_builtin_variable ("current_script_file_name", octave_value ()); |
|
|
3204 } |
|
|
3205 |
|
3021
|
3206 static bool |
|
3523
|
3207 parse_fcn_file (const std::string& ff, bool exec_script, bool force_script = false) |
|
3021
|
3208 { |
|
|
3209 unwind_protect::begin_frame ("parse_fcn_file"); |
|
|
3210 |
|
|
3211 int script_file_executed = false; |
|
|
3212 |
|
|
3213 // Open function file and parse. |
|
|
3214 |
|
|
3215 bool old_reading_fcn_file_state = reading_fcn_file; |
|
|
3216 |
|
|
3217 FILE *in_stream = command_editor::get_input_stream (); |
|
|
3218 |
|
|
3219 unwind_protect::add (restore_input_stream, in_stream); |
|
|
3220 |
|
|
3221 unwind_protect_ptr (ff_instream); |
|
|
3222 |
|
|
3223 unwind_protect_int (input_line_number); |
|
|
3224 unwind_protect_int (current_input_column); |
|
|
3225 unwind_protect_bool (reading_fcn_file); |
|
|
3226 unwind_protect_bool (line_editing); |
|
|
3227 |
|
|
3228 input_line_number = 0; |
|
|
3229 current_input_column = 1; |
|
|
3230 reading_fcn_file = true; |
|
|
3231 line_editing = false; |
|
|
3232 |
|
|
3233 FILE *ffile = get_input_from_file (ff, 0); |
|
|
3234 |
|
|
3235 unwind_protect::add (safe_fclose, ffile); |
|
|
3236 |
|
|
3237 if (ffile) |
|
|
3238 { |
|
|
3239 // Check to see if this file defines a function or is just a |
|
|
3240 // list of commands. |
|
|
3241 |
|
3165
|
3242 if (! force_script && is_function_file (ffile)) |
|
3021
|
3243 { |
|
|
3244 // XXX FIXME XXX -- we shouldn't need both the |
|
|
3245 // command_history object and the |
|
|
3246 // Vsaving_history variable... |
|
|
3247 command_history::ignore_entries (); |
|
|
3248 |
|
|
3249 unwind_protect::add (restore_command_history, 0); |
|
|
3250 |
|
|
3251 unwind_protect_int (Vecho_executing_commands); |
|
|
3252 unwind_protect_bool (Vsaving_history); |
|
|
3253 unwind_protect_bool (reading_fcn_file); |
|
|
3254 unwind_protect_bool (input_from_command_line_file); |
|
3877
|
3255 unwind_protect_bool (get_input_from_eval_string); |
|
3883
|
3256 unwind_protect_bool (parser_end_of_input); |
|
3021
|
3257 |
|
|
3258 Vecho_executing_commands = ECHO_OFF; |
|
|
3259 Vsaving_history = false; |
|
|
3260 reading_fcn_file = true; |
|
|
3261 input_from_command_line_file = false; |
|
3877
|
3262 get_input_from_eval_string = false; |
|
3883
|
3263 parser_end_of_input = false; |
|
3021
|
3264 |
|
|
3265 YY_BUFFER_STATE old_buf = current_buffer (); |
|
|
3266 YY_BUFFER_STATE new_buf = create_buffer (ffile); |
|
|
3267 |
|
|
3268 unwind_protect::add (restore_input_buffer, (void *) old_buf); |
|
|
3269 unwind_protect::add (delete_input_buffer, (void *) new_buf); |
|
|
3270 |
|
|
3271 switch_to_buffer (new_buf); |
|
|
3272 |
|
|
3273 unwind_protect_ptr (curr_sym_tab); |
|
|
3274 |
|
|
3275 reset_parser (); |
|
|
3276 |
|
3665
|
3277 help_buf = gobble_leading_white_space (ffile, true, true, true); |
|
|
3278 |
|
|
3279 octave_comment_buffer::append (help_buf); |
|
3021
|
3280 |
|
|
3281 // XXX FIXME XXX -- this should not be necessary. |
|
3665
|
3282 gobble_leading_white_space (ffile, false, true, false); |
|
3021
|
3283 |
|
|
3284 int status = yyparse (); |
|
|
3285 |
|
|
3286 if (status != 0) |
|
|
3287 { |
|
|
3288 error ("parse error while reading function file %s", |
|
|
3289 ff.c_str ()); |
|
4009
|
3290 fbi_sym_tab->clear (curr_fcn_file_name); |
|
3021
|
3291 } |
|
|
3292 } |
|
|
3293 else if (exec_script) |
|
|
3294 { |
|
|
3295 // The value of `reading_fcn_file' will be restored to the |
|
|
3296 // proper value when we unwind from this frame. |
|
|
3297 reading_fcn_file = old_reading_fcn_file_state; |
|
|
3298 |
|
|
3299 // XXX FIXME XXX -- we shouldn't need both the |
|
|
3300 // command_history object and the |
|
|
3301 // Vsaving_history variable... |
|
|
3302 command_history::ignore_entries (); |
|
|
3303 |
|
|
3304 unwind_protect::add (restore_command_history, 0); |
|
|
3305 |
|
|
3306 unwind_protect_bool (Vsaving_history); |
|
|
3307 unwind_protect_bool (reading_script_file); |
|
|
3308 |
|
|
3309 Vsaving_history = false; |
|
|
3310 reading_script_file = true; |
|
|
3311 |
|
3180
|
3312 unwind_protect::add (clear_current_script_file_name, 0); |
|
|
3313 |
|
|
3314 bind_builtin_variable ("current_script_file_name", ff); |
|
|
3315 |
|
3021
|
3316 parse_and_execute (ffile); |
|
|
3317 |
|
|
3318 script_file_executed = true; |
|
|
3319 } |
|
|
3320 } |
|
3880
|
3321 else |
|
|
3322 error ("no such file, `%s'", ff.c_str ()); |
|
3021
|
3323 |
|
|
3324 unwind_protect::run_frame ("parse_fcn_file"); |
|
|
3325 |
|
|
3326 return script_file_executed; |
|
|
3327 } |
|
|
3328 |
|
|
3329 bool |
|
|
3330 load_fcn_from_file (symbol_record *sym_rec, bool exec_script) |
|
|
3331 { |
|
|
3332 bool script_file_executed = false; |
|
|
3333 |
|
3523
|
3334 std::string nm = sym_rec->name (); |
|
3021
|
3335 |
|
3325
|
3336 if (octave_dynamic_loader::load (nm)) |
|
3021
|
3337 { |
|
|
3338 force_link_to_function (nm); |
|
|
3339 } |
|
|
3340 else |
|
|
3341 { |
|
3523
|
3342 std::string ff = fcn_file_in_path (nm); |
|
3021
|
3343 |
|
|
3344 // These are needed by yyparse. |
|
|
3345 |
|
|
3346 unwind_protect::begin_frame ("load_fcn_from_file"); |
|
|
3347 |
|
|
3348 unwind_protect_str (curr_fcn_file_name); |
|
|
3349 unwind_protect_str (curr_fcn_file_full_name); |
|
|
3350 |
|
|
3351 curr_fcn_file_name = nm; |
|
|
3352 curr_fcn_file_full_name = ff; |
|
|
3353 |
|
|
3354 if (ff.length () > 0) |
|
3165
|
3355 script_file_executed = parse_fcn_file (ff, exec_script); |
|
3021
|
3356 |
|
|
3357 if (! (error_state || script_file_executed)) |
|
|
3358 force_link_to_function (nm); |
|
|
3359 |
|
|
3360 unwind_protect::run_frame ("load_fcn_from_file"); |
|
|
3361 } |
|
|
3362 |
|
|
3363 return script_file_executed; |
|
|
3364 } |
|
|
3365 |
|
|
3366 DEFUN (source, args, , |
|
3371
|
3367 "-*- texinfo -*-\n\ |
|
|
3368 @deftypefn {Built-in Function} {} source (@var{file})\n\ |
|
|
3369 Parse and execute the contents of @var{file}. This is equivalent to\n\ |
|
|
3370 executing commands from a script file, but without requiring the file to\n\ |
|
|
3371 be named @file{@var{file}.m}.\n\ |
|
|
3372 @end deftypefn") |
|
3021
|
3373 { |
|
|
3374 octave_value_list retval; |
|
|
3375 |
|
|
3376 int nargin = args.length (); |
|
|
3377 |
|
|
3378 if (nargin == 1) |
|
|
3379 { |
|
3523
|
3380 std::string file_name = args(0).string_value (); |
|
3021
|
3381 |
|
|
3382 if (! error_state) |
|
|
3383 { |
|
3523
|
3384 std::string file_full_name = file_ops::tilde_expand (file_name); |
|
3388
|
3385 |
|
|
3386 unwind_protect::begin_frame ("Fsource"); |
|
|
3387 |
|
|
3388 unwind_protect_str (curr_fcn_file_name); |
|
|
3389 unwind_protect_str (curr_fcn_file_full_name); |
|
|
3390 |
|
|
3391 curr_fcn_file_name = file_name; |
|
|
3392 curr_fcn_file_full_name = file_full_name; |
|
|
3393 |
|
|
3394 parse_fcn_file (file_full_name, true, true); |
|
3021
|
3395 |
|
|
3396 if (error_state) |
|
3388
|
3397 error ("source: error sourcing file `%s'", |
|
|
3398 file_full_name.c_str ()); |
|
|
3399 |
|
|
3400 unwind_protect::run_frame ("Fsource"); |
|
3021
|
3401 } |
|
|
3402 else |
|
|
3403 error ("source: expecting file name as argument"); |
|
|
3404 } |
|
|
3405 else |
|
|
3406 print_usage ("source"); |
|
|
3407 |
|
|
3408 return retval; |
|
|
3409 } |
|
|
3410 |
|
3726
|
3411 // Evaluate an Octave function (built-in or interpreted) and return |
|
3844
|
3412 // the list of result values. NAME is the name of the function to |
|
|
3413 // call. ARGS are the arguments to the function. NARGOUT is the |
|
|
3414 // number of output arguments expected. |
|
3726
|
3415 |
|
3021
|
3416 octave_value_list |
|
3523
|
3417 feval (const std::string& name, const octave_value_list& args, int nargout) |
|
3156
|
3418 { |
|
|
3419 octave_value_list retval; |
|
|
3420 |
|
|
3421 octave_function *fcn = is_valid_function (name, "feval", 1); |
|
|
3422 |
|
|
3423 if (fcn) |
|
3544
|
3424 retval = fcn->do_multi_index_op (nargout, args); |
|
3156
|
3425 |
|
|
3426 return retval; |
|
|
3427 } |
|
|
3428 |
|
3726
|
3429 // Evaluate an Octave function (built-in or interpreted) and return |
|
|
3430 // the list of result values. The first element of ARGS should be a |
|
|
3431 // string containing the name of the function to call, then the rest |
|
|
3432 // are the actual arguments to the function. NARGOUT is the number of |
|
|
3433 // output arguments expected. |
|
|
3434 |
|
3156
|
3435 octave_value_list |
|
3021
|
3436 feval (const octave_value_list& args, int nargout) |
|
|
3437 { |
|
|
3438 octave_value_list retval; |
|
|
3439 |
|
3156
|
3440 if (args.length () > 0) |
|
3021
|
3441 { |
|
3523
|
3442 std::string name = args(0).string_value (); |
|
3156
|
3443 |
|
|
3444 if (! error_state) |
|
3021
|
3445 { |
|
3156
|
3446 int tmp_nargin = args.length () - 1; |
|
|
3447 |
|
|
3448 octave_value_list tmp_args (tmp_nargin, octave_value ()); |
|
|
3449 |
|
|
3450 for (int i = 0; i < tmp_nargin; i++) |
|
3178
|
3451 tmp_args(i) = args(i+1); |
|
|
3452 |
|
|
3453 string_vector arg_names = args.name_tags (); |
|
|
3454 |
|
|
3455 if (! arg_names.empty ()) |
|
3156
|
3456 { |
|
3726
|
3457 // tmp_nargin and arg_names.length () - 1 may differ if |
|
|
3458 // we are passed all_va_args. |
|
|
3459 |
|
|
3460 int n = arg_names.length () - 1; |
|
|
3461 |
|
|
3462 int len = n > tmp_nargin ? tmp_nargin : n; |
|
|
3463 |
|
|
3464 string_vector tmp_arg_names (len); |
|
|
3465 |
|
|
3466 for (int i = 0; i < len; i++) |
|
3178
|
3467 tmp_arg_names(i) = arg_names(i+1); |
|
|
3468 |
|
|
3469 tmp_args.stash_name_tags (tmp_arg_names); |
|
3156
|
3470 } |
|
|
3471 |
|
|
3472 retval = feval (name, tmp_args, nargout); |
|
3021
|
3473 } |
|
|
3474 } |
|
|
3475 |
|
|
3476 return retval; |
|
|
3477 } |
|
|
3478 |
|
|
3479 DEFUN (feval, args, nargout, |
|
3371
|
3480 "-*- texinfo -*-\n\ |
|
|
3481 @deftypefn {Built-in Function} {} feval (@var{name}, @dots{})\n\ |
|
|
3482 Evaluate the function named @var{name}. Any arguments after the first\n\ |
|
|
3483 are passed on to the named function. For example,\n\ |
|
|
3484 \n\ |
|
|
3485 @example\n\ |
|
|
3486 feval (\"acos\", -1)\n\ |
|
|
3487 @result{} 3.1416\n\ |
|
|
3488 @end example\n\ |
|
3021
|
3489 \n\ |
|
3371
|
3490 @noindent\n\ |
|
|
3491 calls the function @code{acos} with the argument @samp{-1}.\n\ |
|
|
3492 \n\ |
|
|
3493 The function @code{feval} is necessary in order to be able to write\n\ |
|
|
3494 functions that call user-supplied functions, because Octave does not\n\ |
|
|
3495 have a way to declare a pointer to a function (like C) or to declare a\n\ |
|
|
3496 special kind of variable that can be used to hold the name of a function\n\ |
|
|
3497 (like @code{EXTERNAL} in Fortran). Instead, you must refer to functions\n\ |
|
|
3498 by name, and use @code{feval} to call them.\n\ |
|
|
3499 @end deftypefn") |
|
3021
|
3500 { |
|
|
3501 octave_value_list retval; |
|
|
3502 |
|
|
3503 int nargin = args.length (); |
|
|
3504 |
|
|
3505 if (nargin > 0) |
|
|
3506 retval = feval (args, nargout); |
|
|
3507 else |
|
|
3508 print_usage ("feval"); |
|
|
3509 |
|
|
3510 return retval; |
|
|
3511 } |
|
|
3512 |
|
3099
|
3513 octave_value_list |
|
3523
|
3514 eval_string (const std::string& s, bool silent, int& parse_status, int nargout) |
|
3021
|
3515 { |
|
3877
|
3516 octave_value_list retval; |
|
|
3517 |
|
3021
|
3518 unwind_protect::begin_frame ("eval_string"); |
|
|
3519 |
|
|
3520 unwind_protect_bool (get_input_from_eval_string); |
|
3877
|
3521 unwind_protect_bool (input_from_eval_string_pending); |
|
3021
|
3522 unwind_protect_bool (input_from_command_line_file); |
|
3883
|
3523 unwind_protect_bool (parser_end_of_input); |
|
3021
|
3524 unwind_protect_str (current_eval_string); |
|
|
3525 |
|
|
3526 get_input_from_eval_string = true; |
|
3877
|
3527 input_from_eval_string_pending = true; |
|
3021
|
3528 input_from_command_line_file = false; |
|
3883
|
3529 parser_end_of_input = false; |
|
3021
|
3530 current_eval_string = s; |
|
|
3531 |
|
3877
|
3532 unwind_protect_ptr (global_command); |
|
|
3533 |
|
3021
|
3534 YY_BUFFER_STATE old_buf = current_buffer (); |
|
|
3535 YY_BUFFER_STATE new_buf = create_buffer (0); |
|
|
3536 |
|
|
3537 unwind_protect::add (restore_input_buffer, old_buf); |
|
|
3538 unwind_protect::add (delete_input_buffer, new_buf); |
|
|
3539 |
|
|
3540 switch_to_buffer (new_buf); |
|
|
3541 |
|
|
3542 unwind_protect_ptr (curr_sym_tab); |
|
|
3543 |
|
3877
|
3544 do |
|
|
3545 { |
|
|
3546 parse_status = yyparse (); |
|
|
3547 |
|
|
3548 tree_statement_list *command = global_command; |
|
|
3549 |
|
3883
|
3550 if (parse_status == 0) |
|
3877
|
3551 { |
|
3883
|
3552 if (command) |
|
|
3553 { |
|
|
3554 retval = command->eval (silent, nargout); |
|
|
3555 |
|
|
3556 delete command; |
|
|
3557 |
|
|
3558 command = 0; |
|
|
3559 |
|
|
3560 if (error_state |
|
|
3561 || tree_return_command::returning |
|
|
3562 || tree_break_command::breaking |
|
|
3563 || tree_continue_command::continuing) |
|
|
3564 break; |
|
|
3565 } |
|
|
3566 else if (parser_end_of_input) |
|
3877
|
3567 break; |
|
3883
|
3568 } |
|
3877
|
3569 } |
|
|
3570 while (parse_status == 0); |
|
3021
|
3571 |
|
|
3572 unwind_protect::run_frame ("eval_string"); |
|
|
3573 |
|
|
3574 return retval; |
|
|
3575 } |
|
|
3576 |
|
|
3577 octave_value |
|
3523
|
3578 eval_string (const std::string& s, bool silent, int& parse_status) |
|
3021
|
3579 { |
|
|
3580 octave_value retval; |
|
|
3581 |
|
|
3582 octave_value_list tmp = eval_string (s, silent, parse_status, 1); |
|
|
3583 |
|
|
3584 if (! tmp.empty ()) |
|
|
3585 retval = tmp(0); |
|
|
3586 |
|
|
3587 return retval; |
|
|
3588 } |
|
|
3589 |
|
|
3590 static octave_value_list |
|
|
3591 eval_string (const octave_value& arg, bool silent, int& parse_status, |
|
|
3592 int nargout) |
|
|
3593 { |
|
3523
|
3594 std::string s = arg.string_value (); |
|
3021
|
3595 |
|
|
3596 if (error_state) |
|
|
3597 { |
|
3523
|
3598 error ("eval: expecting std::string argument"); |
|
3021
|
3599 return -1.0; |
|
|
3600 } |
|
|
3601 |
|
|
3602 return eval_string (s, silent, parse_status, nargout); |
|
|
3603 } |
|
|
3604 |
|
|
3605 DEFUN (eval, args, nargout, |
|
3371
|
3606 "-*- texinfo -*-\n\ |
|
|
3607 @deftypefn {Built-in Function} {} eval (@var{try}, @var{catch})\n\ |
|
|
3608 Parse the string @var{try} and evaluate it as if it were an Octave\n\ |
|
|
3609 program, returning the last value computed. If that fails, evaluate\n\ |
|
|
3610 the string @var{catch}. The string @var{try} is evaluated in the\n\ |
|
|
3611 current context, so any results remain available after @code{eval}\n\ |
|
|
3612 returns. For example,\n\ |
|
|
3613 \n\ |
|
|
3614 @example\n\ |
|
|
3615 @group\n\ |
|
|
3616 eval (\"a = 13\")\n\ |
|
|
3617 @print{} a = 13\n\ |
|
|
3618 @result{} 13\n\ |
|
|
3619 @end group\n\ |
|
|
3620 @end example\n\ |
|
3021
|
3621 \n\ |
|
3371
|
3622 In this case, the value of the evaluated expression is printed and it is\n\ |
|
|
3623 also returned returned from @code{eval}. Just as with any other\n\ |
|
|
3624 expression, you can turn printing off by ending the expression in a\n\ |
|
|
3625 semicolon. For example,\n\ |
|
|
3626 \n\ |
|
|
3627 @example\n\ |
|
|
3628 eval (\"a = 13;\")\n\ |
|
|
3629 @result{} 13\n\ |
|
|
3630 @end example\n\ |
|
|
3631 \n\ |
|
|
3632 In this example, the variable @code{a} has been given the value 13, but\n\ |
|
|
3633 the value of the expression is not printed. You can also turn off\n\ |
|
|
3634 automatic printing for all expressions executed by @code{eval} using the\n\ |
|
|
3635 variable @code{default_eval_print_flag}.\n\ |
|
|
3636 @end deftypefn") |
|
3021
|
3637 { |
|
|
3638 octave_value_list retval; |
|
|
3639 |
|
|
3640 int nargin = args.length (); |
|
|
3641 |
|
|
3642 if (nargin > 0) |
|
|
3643 { |
|
|
3644 unwind_protect::begin_frame ("Feval"); |
|
|
3645 |
|
|
3646 if (nargin > 1) |
|
|
3647 { |
|
|
3648 unwind_protect_bool (buffer_error_messages); |
|
|
3649 buffer_error_messages = true; |
|
|
3650 } |
|
|
3651 |
|
|
3652 int parse_status = 0; |
|
|
3653 |
|
|
3654 retval = eval_string (args(0), ! Vdefault_eval_print_flag, |
|
|
3655 parse_status, nargout); |
|
|
3656 |
|
|
3657 if (nargin > 1 && (parse_status != 0 || error_state)) |
|
|
3658 { |
|
|
3659 error_state = 0; |
|
|
3660 |
|
|
3661 // Set up for letting the user print any messages from |
|
|
3662 // errors that occurred in the first part of this eval(). |
|
|
3663 |
|
|
3664 buffer_error_messages = false; |
|
3815
|
3665 |
|
3021
|
3666 bind_global_error_variable (); |
|
3815
|
3667 |
|
3021
|
3668 unwind_protect::add (clear_global_error_variable, 0); |
|
|
3669 |
|
|
3670 eval_string (args(1), 0, parse_status, nargout); |
|
|
3671 |
|
|
3672 retval = octave_value_list (); |
|
|
3673 } |
|
|
3674 |
|
|
3675 unwind_protect::run_frame ("Feval"); |
|
|
3676 } |
|
|
3677 else |
|
|
3678 print_usage ("eval"); |
|
|
3679 |
|
|
3680 return retval; |
|
|
3681 } |
|
|
3682 |
|
|
3683 static int |
|
|
3684 default_eval_print_flag (void) |
|
|
3685 { |
|
|
3686 Vdefault_eval_print_flag = check_preference ("default_eval_print_flag"); |
|
|
3687 |
|
|
3688 return 0; |
|
|
3689 } |
|
|
3690 |
|
2166
|
3691 static int |
|
|
3692 warn_assign_as_truth_value (void) |
|
|
3693 { |
|
|
3694 Vwarn_assign_as_truth_value |
|
|
3695 = check_preference ("warn_assign_as_truth_value"); |
|
|
3696 |
|
|
3697 return 0; |
|
|
3698 } |
|
|
3699 |
|
|
3700 static int |
|
|
3701 warn_function_name_clash (void) |
|
|
3702 { |
|
|
3703 Vwarn_function_name_clash = check_preference ("warn_function_name_clash"); |
|
|
3704 |
|
|
3705 return 0; |
|
|
3706 } |
|
|
3707 |
|
|
3708 static int |
|
3162
|
3709 warn_future_time_stamp (void) |
|
|
3710 { |
|
|
3711 Vwarn_future_time_stamp = check_preference ("warn_future_time_stamp"); |
|
|
3712 |
|
|
3713 return 0; |
|
|
3714 } |
|
|
3715 |
|
|
3716 static int |
|
2166
|
3717 warn_missing_semicolon (void) |
|
|
3718 { |
|
|
3719 Vwarn_missing_semicolon = check_preference ("warn_missing_semicolon"); |
|
|
3720 |
|
|
3721 return 0; |
|
|
3722 } |
|
|
3723 |
|
2764
|
3724 static int |
|
4023
|
3725 warn_precedence_change (void) |
|
|
3726 { |
|
|
3727 Vwarn_precedence_change = check_preference ("warn_precedence_change"); |
|
|
3728 |
|
|
3729 return 0; |
|
|
3730 } |
|
|
3731 |
|
|
3732 static int |
|
2764
|
3733 warn_variable_switch_label (void) |
|
|
3734 { |
|
|
3735 Vwarn_variable_switch_label |
|
|
3736 = check_preference ("warn_variable_switch_label"); |
|
|
3737 |
|
|
3738 return 0; |
|
|
3739 } |
|
|
3740 |
|
2166
|
3741 void |
|
|
3742 symbols_of_parse (void) |
|
|
3743 { |
|
3258
|
3744 DEFVAR (default_eval_print_flag, 1.0, default_eval_print_flag, |
|
3371
|
3745 "-*- texinfo -*-\n\ |
|
|
3746 @defvr {Built-in Variable} default_eval_print_flag\n\ |
|
|
3747 If the value of this variable is nonzero, Octave prints the results of\n\ |
|
|
3748 commands executed by @code{eval} that do not end with semicolons. If it\n\ |
|
|
3749 is zero, automatic printing is suppressed. The default value is 1.\n\ |
|
|
3750 @end defvr"); |
|
3021
|
3751 |
|
3258
|
3752 DEFVAR (warn_assign_as_truth_value, 1.0, warn_assign_as_truth_value, |
|
3366
|
3753 "-*- texinfo -*-\n\ |
|
|
3754 @defvr {Built-in Variable} warn_assign_as_truth_value\n\ |
|
|
3755 If the value of @code{warn_assign_as_truth_value} is nonzero, a\n\ |
|
|
3756 warning is issued for statements like\n\ |
|
|
3757 \n\ |
|
|
3758 @example\n\ |
|
|
3759 if (s = t)\n\ |
|
|
3760 ...\n\ |
|
|
3761 @end example\n\ |
|
|
3762 \n\ |
|
|
3763 @noindent\n\ |
|
|
3764 since such statements are not common, and it is likely that the intent\n\ |
|
|
3765 was to write\n\ |
|
|
3766 \n\ |
|
|
3767 @example\n\ |
|
|
3768 if (s == t)\n\ |
|
|
3769 ...\n\ |
|
|
3770 @end example\n\ |
|
|
3771 \n\ |
|
|
3772 @noindent\n\ |
|
|
3773 instead.\n\ |
|
|
3774 \n\ |
|
|
3775 There are times when it is useful to write code that contains\n\ |
|
|
3776 assignments within the condition of a @code{while} or @code{if}\n\ |
|
|
3777 statement. For example, statements like\n\ |
|
|
3778 \n\ |
|
|
3779 @example\n\ |
|
|
3780 while (c = getc())\n\ |
|
|
3781 ...\n\ |
|
|
3782 @end example\n\ |
|
|
3783 \n\ |
|
|
3784 @noindent\n\ |
|
|
3785 are common in C programming.\n\ |
|
|
3786 \n\ |
|
|
3787 It is possible to avoid all warnings about such statements by setting\n\ |
|
|
3788 @code{warn_assign_as_truth_value} to 0, but that may also\n\ |
|
|
3789 let real errors like\n\ |
|
|
3790 \n\ |
|
|
3791 @example\n\ |
|
|
3792 if (x = 1) # intended to test (x == 1)!\n\ |
|
|
3793 ...\n\ |
|
|
3794 @end example\n\ |
|
|
3795 \n\ |
|
|
3796 @noindent\n\ |
|
|
3797 slip by.\n\ |
|
|
3798 \n\ |
|
|
3799 In such cases, it is possible suppress errors for specific statements by\n\ |
|
|
3800 writing them with an extra set of parentheses. For example, writing the\n\ |
|
|
3801 previous example as\n\ |
|
|
3802 \n\ |
|
|
3803 @example\n\ |
|
|
3804 while ((c = getc()))\n\ |
|
|
3805 ...\n\ |
|
|
3806 @end example\n\ |
|
|
3807 \n\ |
|
|
3808 @noindent\n\ |
|
|
3809 will prevent the warning from being printed for this statement, while\n\ |
|
|
3810 allowing Octave to warn about other assignments used in conditional\n\ |
|
|
3811 contexts.\n\ |
|
|
3812 \n\ |
|
|
3813 The default value of @code{warn_assign_as_truth_value} is 1.\n\ |
|
|
3814 @end defvr"); |
|
2166
|
3815 |
|
3258
|
3816 DEFVAR (warn_function_name_clash, 1.0, warn_function_name_clash, |
|
3371
|
3817 "-*- texinfo -*-\n\ |
|
|
3818 @defvr {Built-in Variable} warn_function_name_clash\n\ |
|
|
3819 If the value of @code{warn_function_name_clash} is nonzero, a warning is\n\ |
|
|
3820 issued when Octave finds that the name of a function defined in a\n\ |
|
|
3821 function file differs from the name of the file. (If the names\n\ |
|
|
3822 disagree, the name declared inside the file is ignored.) If the value\n\ |
|
|
3823 is 0, the warning is omitted. The default value is 1.\n\ |
|
|
3824 @end defvr"); |
|
2166
|
3825 |
|
3258
|
3826 DEFVAR (warn_future_time_stamp, 1.0, warn_future_time_stamp, |
|
3446
|
3827 "-*- texinfo -*-\n\ |
|
|
3828 @defvr {Built-in Variable} warn_future_time_stamp\n\ |
|
|
3829 If the value of this variable is nonzero, Octave will print a warning\n\ |
|
|
3830 if it finds a function file with a time stamp that is in the future.\n\ |
|
|
3831 @end defvr"); |
|
3162
|
3832 |
|
3258
|
3833 DEFVAR (warn_missing_semicolon, 0.0, warn_missing_semicolon, |
|
3371
|
3834 "-*- texinfo -*-\n\ |
|
|
3835 @defvr {Built-in Variable} warn_missing_semicolon\n\ |
|
|
3836 If the value of this variable is nonzero, Octave will warn when\n\ |
|
|
3837 statements in function definitions don't end in semicolons. The default\n\ |
|
|
3838 value is 0.\n\ |
|
|
3839 @end defvr"); |
|
2764
|
3840 |
|
4023
|
3841 DEFVAR (warn_precedence_change, 1.0, warn_precedence_change, |
|
|
3842 "-*- texinfo -*-\n\ |
|
|
3843 @defvr {Built-in Variable} warn_precedence_change\n\ |
|
|
3844 If the value of this variable is nonzero, Octave will warn about\n\ |
|
|
3845 possible changes in the meaning of some code due to changes in\n\ |
|
|
3846 precedence for some operators. Precedence changes have typically\n\ |
|
|
3847 been made for Matlab compatibility. The default value is 1.\n\ |
|
|
3848 @end defvr"); |
|
|
3849 |
|
3258
|
3850 DEFVAR (warn_variable_switch_label, 0.0, warn_variable_switch_label, |
|
3366
|
3851 "-*- texinfo -*-\n\ |
|
|
3852 @defvr {Built-in Variable} warn_variable_switch_label\n\ |
|
|
3853 If the value of this variable is nonzero, Octave will print a warning if\n\ |
|
|
3854 a switch label is not a constant or constant expression\n\ |
|
|
3855 @end defvr"); |
|
3347
|
3856 |
|
2166
|
3857 } |
|
|
3858 |
|
1994
|
3859 /* |
|
|
3860 ;;; Local Variables: *** |
|
|
3861 ;;; mode: text *** |
|
|
3862 ;;; End: *** |
|
|
3863 */ |
