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