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1 /* lex.l -*- C++ -*- |
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2 |
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1009
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3 Copyright (C) 1992, 1993, 1994, 1995 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 GNU CC; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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20 |
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21 */ |
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22 |
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23 %x HELP_FCN |
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24 %s TEXT_FCN |
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25 %s MATRIX |
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26 |
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27 %{ |
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428
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28 #define SHORT_CIRCUIT_LOGICALS 1 |
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29 |
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240
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30 #ifdef HAVE_CONFIG_H |
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1220
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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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973
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34 #include <strstream.h> |
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1072
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35 #include <ctype.h> |
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522
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36 #include <string.h> |
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37 |
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38 #include "input.h" |
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143
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39 #include "token.h" |
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40 |
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41 #include "SLStack.h" |
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42 |
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143
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43 // Stack to hold tokens so that we can delete them when the parser is |
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44 // reset and avoid growing forever just because we are stashing some |
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45 // information. This has to appear before lex.h is included, because |
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46 // one of the macros defined there uses token_stack. |
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47 static SLStack <token*> token_stack; |
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48 |
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430
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49 #include "user-prefs.h" |
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1
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50 #include "variables.h" |
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143
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51 #include "octave.h" |
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1
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52 #include "symtab.h" |
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53 #include "error.h" |
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54 #include "utils.h" |
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584
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55 #include "tree-base.h" |
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56 #include "tree-expr.h" |
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57 #include "tree-cmd.h" |
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576
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58 #include "tree-misc.h" |
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488
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59 #include "tree-plot.h" |
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60 #include "tree-const.h" |
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1
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61 #include "y.tab.h" |
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62 #include "parse.h" |
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63 #include "lex.h" |
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64 |
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65 // Nonzero means we think we are looking at a set command. |
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66 static int doing_set = 0; |
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67 |
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68 // GAG. Stupid kludge so that [[1,2][3,4]] will work. |
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69 static do_comma_insert = 0; |
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70 |
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71 // Brace level count. |
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72 static int braceflag = 0; |
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73 |
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74 // Return transpose or start a string? |
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240
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75 int quote_is_transpose = 0; |
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1
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76 |
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440
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77 // Nonzero means we thing we are looking at the beginning of a |
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78 // function definition. |
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79 int beginning_of_function = 0; |
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80 |
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1
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81 // Nonzero means that we should convert spaces to a comma inside a |
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82 // matrix definition. |
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83 static int convert_spaces_to_comma = 1; |
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84 |
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85 // Another context hack, this time for the plot command's `using', |
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86 // `title', and `with' keywords. |
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87 static int cant_be_identifier = 0; |
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88 |
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985
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89 #define BRACE 1 |
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90 #define PAREN 2 |
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91 |
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1088
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92 // Did eat_whitespace() eat a space or tab, or a newline, or both? |
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93 #define ATE_SPACE_OR_TAB 1 |
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94 #define ATE_NEWLINE 2 |
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95 |
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1
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96 // Is the closest nesting level a square brace or a paren? |
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97 // |
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985
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98 // BRACE -> spaces are important (they can turn into commas) |
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99 // new lines are important (they can turn into semicolons) |
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1
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100 // |
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985
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101 // PAREN -> spaces and new lines are not important |
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102 |
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103 static SLStack <int> nesting_level; |
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104 |
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146
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105 // Forward declarations for functions defined at the bottom of this |
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106 // file. |
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107 |
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108 static void do_string_escapes (char *s); |
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109 static void fixup_column_count (char *s); |
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146
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110 static void do_comma_insert_check (void); |
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111 static int is_plot_keyword (char *s); |
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112 static int is_keyword (char *s); |
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113 static char *plot_style_token (char *s); |
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114 static symbol_record *lookup_identifier (char *s); |
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115 static void grab_help_text (void); |
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116 static int match_any (char c, char *s); |
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117 static int next_token_is_bin_op (int spc_prev, char *yytext); |
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118 static int next_token_is_postfix_unary_op (int spc_prev, char *yytext); |
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119 static char *strip_trailing_whitespace (char *s); |
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972
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120 static void handle_number (char *yytext); |
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975
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121 static int handle_string (char delim, int text_style = 0); |
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122 static int handle_close_brace (int spc_gobbled); |
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123 static int handle_identifier (char *tok, int spc_gobbled); |
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124 static int have_continuation (int trailing_comments_ok = 1); |
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125 static int have_ellipsis_continuation (int trailing_comments_ok = 1); |
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126 static int eat_whitespace (void); |
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127 static int eat_continuation (void); |
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128 |
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129 %} |
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130 |
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131 D [0-9] |
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132 S [ \t] |
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133 NL [\n] |
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134 SNL [ \t\n] |
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1
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135 EL (\.\.\.) |
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136 BS (\\) |
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137 CONT ({EL}|{BS}) |
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138 Im [iIjJ] |
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967
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139 CCHAR [#%] |
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140 COMMENT ({CCHAR}.*{NL}) |
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141 SNLCMT ({SNL}|{COMMENT}) |
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142 NOTEQ ((~=)|(!=)|(<>)) |
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143 POW ((\*\*)|(\^)) |
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144 EPOW (\.{POW}) |
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145 PLUS ((\+)|(\.\+)) |
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146 MINUS ((\-)|(\.\-)) |
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147 NOT ((\~)|(\!)) |
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1
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148 IDENT ([_a-zA-Z][_a-zA-Z0-9]*) |
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149 EXPON ([DdEe][+-]?{D}+) |
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968
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150 NUMBER (({D}+\.?{D}*{EXPON}?)|(\.{D}+{EXPON}?)) |
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151 %% |
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152 |
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968
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153 %{ |
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154 // Help and other text-style functions are a pain in the ass. This |
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155 // stuff needs to be simplified. May require some changes in the |
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156 // parser too. |
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157 %} |
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158 |
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967
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159 <HELP_FCN>{NL} | |
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160 <TEXT_FCN>{NL} { |
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161 BEGIN 0; |
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162 current_input_column = 1; |
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163 quote_is_transpose = 0; |
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164 cant_be_identifier = 0; |
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165 convert_spaces_to_comma = 1; |
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166 return '\n'; |
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167 } |
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1
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168 |
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967
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169 <TEXT_FCN>[\;\,] { |
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170 if (doing_set && strcmp (yytext, ",") == 0) |
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171 { |
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1060
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172 TOK_PUSH_AND_RETURN (yytext, TEXT); |
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967
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173 } |
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174 else |
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175 { |
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176 BEGIN 0; |
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177 if (strcmp (yytext, ",") == 0) |
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178 TOK_RETURN (','); |
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179 else |
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180 TOK_RETURN (';'); |
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181 } |
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182 } |
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1
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183 |
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975
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184 <TEXT_FCN>[\"\'] { |
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185 current_input_column++; |
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186 return handle_string (yytext[0], 1); |
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187 } |
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188 |
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967
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189 <HELP_FCN>[^ \t\n]*{S}* | |
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1
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190 <TEXT_FCN>[^ \t\n\;\,]*{S}* { |
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967
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191 static char *tok = 0; |
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192 delete [] tok; |
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193 tok = strip_trailing_whitespace (yytext); |
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1060
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194 TOK_PUSH_AND_RETURN (tok, TEXT); |
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967
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195 } |
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1
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196 |
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968
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197 %{ |
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1
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198 // For this and the next two rules, we're looking at ']', and we |
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971
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199 // need to know if the next token is `=' or `=='. |
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200 // |
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201 // It would have been so much easier if the delimiters were simply |
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202 // different for the expression on the left hand side of the equals |
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203 // operator. |
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971
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204 // |
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205 // It's also a pain in the ass to decide whether to insert a comma |
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206 // after seeing a ']' character... |
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968
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207 %} |
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208 |
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967
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209 <MATRIX>{SNL}*\]{S}* { |
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1001
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210 fixup_column_count (yytext); |
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211 int c = yytext[yyleng-1]; |
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212 int cont_is_spc = eat_continuation (); |
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213 int spc_gobbled = (cont_is_spc || c == ' ' || c == '\t'); |
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214 return handle_close_brace (spc_gobbled); |
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967
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215 } |
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216 |
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968
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217 %{ |
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1088
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218 // Commas are element separators in matrix constants. If we don't |
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219 // check for continuations here we can end up inserting too many |
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220 // commas. |
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968
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221 %} |
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222 |
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967
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223 <MATRIX>{S}*\,{S}* { |
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224 current_input_column += yyleng; |
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225 int tmp = eat_continuation (); |
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226 quote_is_transpose = 0; |
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227 cant_be_identifier = 0; |
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228 convert_spaces_to_comma = 1; |
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229 if (user_pref.whitespace_in_literal_matrix != 2 |
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230 && (tmp & ATE_NEWLINE) == ATE_NEWLINE) |
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231 unput (';'); |
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232 return (','); |
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967
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233 } |
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1
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234 |
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968
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235 %{ |
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236 // In some cases, spaces in matrix constants can turn into commas. |
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237 // If commas are required, spaces are not important in matrix |
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1088
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238 // constants so we just eat them. If we don't check for continuations |
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239 // here we can end up inserting too many commas. |
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968
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240 %} |
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430
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241 |
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968
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242 <MATRIX>{S}+ { |
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1088
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243 current_input_column += yyleng; |
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985
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244 if (user_pref.whitespace_in_literal_matrix != 2) |
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967
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245 { |
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1088
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246 int tmp = eat_continuation (); |
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967
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247 int bin_op = next_token_is_bin_op (1, yytext); |
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248 int postfix_un_op = next_token_is_postfix_unary_op (1, yytext); |
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249 |
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985
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250 if (! (postfix_un_op || bin_op || nesting_level.empty ()) |
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251 && nesting_level.top () == BRACE |
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967
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252 && convert_spaces_to_comma) |
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1088
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253 { |
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254 quote_is_transpose = 0; |
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255 cant_be_identifier = 0; |
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256 convert_spaces_to_comma = 1; |
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257 if ((tmp & ATE_NEWLINE) == ATE_NEWLINE) |
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258 unput (';'); |
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259 return (','); |
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260 } |
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967
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261 } |
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262 } |
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430
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263 |
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968
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264 %{ |
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1088
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265 // Semicolons are handled as row seprators in matrix constants. If we |
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266 // don't eat whitespace here we can end up inserting too many |
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267 // semicolons. |
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968
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268 %} |
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269 |
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985
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270 <MATRIX>{SNLCMT}*;{SNLCMT}* { |
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967
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271 fixup_column_count (yytext); |
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1001
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272 eat_whitespace (); |
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967
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273 quote_is_transpose = 0; |
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274 cant_be_identifier = 0; |
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275 convert_spaces_to_comma = 1; |
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276 return ';'; |
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277 } |
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278 |
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968
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279 %{ |
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1088
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280 // In some cases, new lines can also become row separators. If we |
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281 // don't eat whitespace here we can end up inserting too many |
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282 // semicolons. |
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985
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283 %} |
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284 |
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285 <MATRIX>{SNLCMT}*\n{SNLCMT}* { |
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1082
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286 fixup_column_count (yytext); |
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1088
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287 eat_whitespace (); |
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985
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288 if (user_pref.whitespace_in_literal_matrix != 2) |
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289 { |
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290 quote_is_transpose = 0; |
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291 cant_be_identifier = 0; |
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292 convert_spaces_to_comma = 1; |
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293 |
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294 if (nesting_level.empty ()) |
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295 return LEXICAL_ERROR; |
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296 |
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297 if (nesting_level.top () == BRACE) |
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298 return ';'; |
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299 } |
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300 } |
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301 |
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302 %{ |
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968
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303 // Open and close brace are handled differently if we are in the range |
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304 // part of a plot command. |
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975
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305 // |
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968
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306 %} |
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1
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307 |
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967
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308 \[{S}* { |
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1082
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309 nesting_level.push (BRACE); |
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975
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310 |
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1082
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311 current_input_column += yyleng; |
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312 quote_is_transpose = 0; |
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313 cant_be_identifier = 0; |
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314 convert_spaces_to_comma = 1; |
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975
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315 |
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316 promptflag--; |
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317 eat_whitespace (); |
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318 |
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967
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319 if (plotting && ! past_plot_range) |
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320 { |
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321 in_plot_range = 1; |
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1082
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322 return OPEN_BRACE; |
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967
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323 } |
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324 else |
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325 { |
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326 mlnm.push (1); |
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327 braceflag++; |
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975
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328 BEGIN MATRIX; |
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1082
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329 return '['; |
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967
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330 } |
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331 } |
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1
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332 |
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968
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333 \] { |
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985
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334 if (! nesting_level.empty ()) |
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335 nesting_level.pop (); |
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968
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336 |
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337 if (plotting && ! past_plot_range) |
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338 { |
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339 in_plot_range = 0; |
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340 TOK_RETURN (CLOSE_BRACE); |
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341 } |
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342 else |
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343 TOK_RETURN (']'); |
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344 } |
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345 |
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346 %{ |
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347 // Imaginary numbers. |
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348 %} |
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349 |
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350 {NUMBER}{Im} { |
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972
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351 handle_number (yytext); |
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968
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352 return IMAG_NUM; |
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353 } |
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354 |
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355 %{ |
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356 // Real numbers. Don't grab the `.' part of a dot operator as part of |
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357 // the constant. |
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358 %} |
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359 |
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360 {D}+/\.[\*/\\^'] | |
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361 {NUMBER} { |
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972
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362 handle_number (yytext); |
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968
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363 return NUM; |
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364 } |
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365 |
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366 %{ |
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367 // Eat whitespace. Whitespace inside matrix constants is handled by |
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368 // the <MATRIX> start state code above. |
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369 %} |
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370 |
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967
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371 {S}* { |
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372 current_input_column += yyleng; |
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373 } |
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374 |
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968
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375 %{ |
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376 // Continuation lines. Allow comments after continuations. |
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377 %} |
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378 |
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967
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379 {CONT}{S}*{NL} | |
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380 {CONT}{S}*{COMMENT} { |
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381 promptflag--; |
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382 current_input_column = 1; |
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383 } |
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1
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384 |
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968
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385 %{ |
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386 // An ellipsis not at the end of a line is not a continuation, but |
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387 // does have another meaning. |
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388 %} |
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389 |
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967
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390 {EL} { |
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391 return ELLIPSIS; |
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392 } |
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1
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393 |
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968
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394 %{ |
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395 // End of file. |
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396 %} |
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397 |
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967
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398 <<EOF>> { |
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399 TOK_RETURN (END_OF_INPUT); |
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400 } |
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1
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401 |
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968
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402 %{ |
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970
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403 // Identifiers. Truncate the token at the first space or tab but |
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404 // don't write directly on yytext. |
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968
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405 %} |
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406 |
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967
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407 {IDENT}{S}* { |
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408 static char *tok = 0; |
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409 delete [] tok; |
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410 tok = strip_trailing_whitespace (yytext); |
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1001
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411 int c = yytext[yyleng-1]; |
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412 int cont_is_spc = eat_continuation (); |
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413 int spc_gobbled = (cont_is_spc || c == ' ' || c == '\t'); |
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414 return handle_identifier (tok, spc_gobbled); |
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967
|
415 } |
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1
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416 |
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968
|
417 %{ |
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418 // A new line character. New line characters inside matrix constants |
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985
|
419 // are handled by the <MATRIX> start state code above. If closest |
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420 // nesting is inside parentheses, don't return a row separator. |
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968
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421 %} |
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422 |
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967
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423 {NL} { |
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424 quote_is_transpose = 0; |
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425 cant_be_identifier = 0; |
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426 current_input_column = 1; |
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427 convert_spaces_to_comma = 1; |
|
985
|
428 |
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429 if (nesting_level.empty ()) |
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430 return '\n'; |
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431 |
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432 if (nesting_level.top () == BRACE) |
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433 return LEXICAL_ERROR; |
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967
|
434 } |
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1
|
435 |
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968
|
436 %{ |
|
|
437 // Single quote can either be the beginning of a string or a transpose |
|
|
438 // operator. |
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439 %} |
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440 |
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967
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441 "'" { |
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442 current_input_column++; |
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|
443 convert_spaces_to_comma = 1; |
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1
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444 |
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967
|
445 if (quote_is_transpose) |
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|
446 { |
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447 do_comma_insert_check (); |
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|
448 return QUOTE; |
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|
449 } |
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|
450 else |
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973
|
451 return handle_string ('\''); |
|
967
|
452 } |
|
1
|
453 |
|
968
|
454 %{ |
|
971
|
455 // Double quotes always begin strings. |
|
|
456 %} |
|
|
457 |
|
973
|
458 \" { |
|
|
459 current_input_column++; |
|
|
460 return handle_string ('"'); |
|
|
461 } |
|
971
|
462 |
|
|
463 %{ |
|
|
464 // The colon operator is handled differently if we are in the range |
|
|
465 // part of a plot command. |
|
968
|
466 %} |
|
|
467 |
|
967
|
468 ":" { |
|
|
469 if (plotting && (in_plot_range || in_plot_using)) |
|
|
470 BIN_OP_RETURN (COLON, 1); |
|
|
471 else |
|
|
472 BIN_OP_RETURN (':', 0); |
|
|
473 } |
|
1
|
474 |
|
968
|
475 %{ |
|
985
|
476 // Gobble comments. If closest nesting is inside parentheses, don't |
|
|
477 // return a new line. |
|
|
478 %} |
|
968
|
479 |
|
967
|
480 {CCHAR} { |
|
1019
|
481 if (! help_buf && beginning_of_function && nesting_level.empty ()) |
|
967
|
482 { |
|
|
483 grab_help_text (); |
|
|
484 beginning_of_function = 0; |
|
|
485 } |
|
|
486 else |
|
|
487 { |
|
|
488 int c; |
|
|
489 while ((c = yyinput ()) != EOF && c != '\n') |
|
|
490 ; // Eat comment. |
|
|
491 } |
|
440
|
492 |
|
967
|
493 quote_is_transpose = 0; |
|
|
494 cant_be_identifier = 0; |
|
|
495 current_input_column = 1; |
|
|
496 convert_spaces_to_comma = 1; |
|
985
|
497 |
|
|
498 if (nesting_level.empty () || nesting_level.top () == BRACE) |
|
|
499 return '\n'; |
|
967
|
500 } |
|
440
|
501 |
|
968
|
502 %{ |
|
|
503 // Other operators. |
|
|
504 %} |
|
|
505 |
|
143
|
506 ".*" { BIN_OP_RETURN (EMUL, 0); } |
|
|
507 "./" { BIN_OP_RETURN (EDIV, 0); } |
|
|
508 ".\\" { BIN_OP_RETURN (ELEFTDIV, 0); } |
|
967
|
509 {EPOW} { BIN_OP_RETURN (EPOW, 0); } |
|
146
|
510 ".'" { do_comma_insert_check (); BIN_OP_RETURN (TRANSPOSE, 1); } |
|
|
511 "++" { do_comma_insert_check (); BIN_OP_RETURN (PLUS_PLUS, 1); } |
|
|
512 "--" { do_comma_insert_check (); BIN_OP_RETURN (MINUS_MINUS, 1); } |
|
143
|
513 "<=" { BIN_OP_RETURN (EXPR_LE, 0); } |
|
|
514 "==" { BIN_OP_RETURN (EXPR_EQ, 0); } |
|
967
|
515 {NOTEQ} { BIN_OP_RETURN (EXPR_NE, 0); } |
|
143
|
516 ">=" { BIN_OP_RETURN (EXPR_GE, 0); } |
|
|
517 "|" { BIN_OP_RETURN (EXPR_OR, 0); } |
|
|
518 "&" { BIN_OP_RETURN (EXPR_AND, 0); } |
|
|
519 "<" { BIN_OP_RETURN (EXPR_LT, 0); } |
|
|
520 ">" { BIN_OP_RETURN (EXPR_GT, 0); } |
|
|
521 "*" { BIN_OP_RETURN ('*', 0); } |
|
|
522 "/" { BIN_OP_RETURN ('/', 0); } |
|
|
523 "\\" { BIN_OP_RETURN (LEFTDIV, 0); } |
|
|
524 ";" { BIN_OP_RETURN (';', 1); } |
|
|
525 "," { BIN_OP_RETURN (',', 1); } |
|
967
|
526 {POW} { BIN_OP_RETURN (POW, 0); } |
|
143
|
527 "=" { BIN_OP_RETURN ('=', 1); } |
|
967
|
528 |
|
|
529 "||" { |
|
|
530 #ifdef SHORT_CIRCUIT_LOGICALS |
|
|
531 BIN_OP_RETURN (EXPR_OR_OR, 0); |
|
|
532 #else |
|
|
533 BIN_OP_RETURN (EXPR_OR, 0); |
|
|
534 #endif |
|
|
535 } |
|
|
536 |
|
|
537 "&&" { |
|
|
538 #ifdef SHORT_CIRCUIT_LOGICALS |
|
|
539 BIN_OP_RETURN (EXPR_AND_AND, 0); |
|
|
540 #else |
|
|
541 BIN_OP_RETURN (EXPR_AND, 0); |
|
|
542 #endif |
|
|
543 } |
|
|
544 |
|
|
545 {NOT} { |
|
|
546 if (plotting && ! in_plot_range) |
|
|
547 past_plot_range = 1; |
|
|
548 BIN_OP_RETURN (EXPR_NOT, 0); |
|
|
549 } |
|
1
|
550 |
|
967
|
551 {PLUS} { |
|
|
552 if (plotting && ! in_plot_range) |
|
|
553 past_plot_range = 1; |
|
|
554 BIN_OP_RETURN ('+', 0); |
|
|
555 } |
|
|
556 |
|
|
557 {MINUS} { |
|
|
558 if (plotting && ! in_plot_range) |
|
|
559 past_plot_range = 1; |
|
|
560 BIN_OP_RETURN ('-', 0); |
|
|
561 } |
|
|
562 |
|
|
563 "(" { |
|
|
564 if (plotting && ! in_plot_range) |
|
|
565 past_plot_range = 1; |
|
985
|
566 nesting_level.push (PAREN); |
|
|
567 promptflag--; |
|
967
|
568 TOK_RETURN ('('); |
|
|
569 } |
|
|
570 |
|
|
571 ")" { |
|
985
|
572 if (! nesting_level.empty ()) |
|
1001
|
573 nesting_level.pop (); |
|
|
574 |
|
967
|
575 current_input_column++; |
|
|
576 cant_be_identifier = 1; |
|
|
577 quote_is_transpose = 1; |
|
985
|
578 convert_spaces_to_comma = (! nesting_level.empty () |
|
|
579 && nesting_level.top () == BRACE); |
|
1001
|
580 do_comma_insert_check (); |
|
967
|
581 return ')'; |
|
|
582 } |
|
|
583 |
|
968
|
584 %{ |
|
1
|
585 // We return everything else as single character tokens, which should |
|
|
586 // eventually result in a parse error. |
|
968
|
587 %} |
|
1
|
588 |
|
968
|
589 . { TOK_RETURN (yytext[0]); } |
|
1
|
590 |
|
|
591 %% |
|
|
592 |
|
767
|
593 // GAG. |
|
|
594 // |
|
|
595 // If we're reading a matrix and the next character is '[', make sure |
|
|
596 // that we insert a comma ahead of it. |
|
|
597 |
|
146
|
598 void |
|
1
|
599 do_comma_insert_check (void) |
|
|
600 { |
|
1001
|
601 int spc_gobbled = eat_continuation (); |
|
1
|
602 int c = yyinput (); |
|
146
|
603 yyunput (c, yytext); |
|
1001
|
604 if (spc_gobbled) |
|
|
605 yyunput (' ', yytext); |
|
1
|
606 do_comma_insert = (braceflag && c == '['); |
|
|
607 } |
|
|
608 |
|
767
|
609 // Fix things up for errors or interrupts. The parser is never called |
|
|
610 // recursively, so it is always safe to reinitialize its state before |
|
|
611 // doing any parsing. |
|
|
612 |
|
1
|
613 void |
|
|
614 reset_parser (void) |
|
|
615 { |
|
287
|
616 // Start off on the right foot. |
|
1
|
617 BEGIN 0; |
|
166
|
618 error_state = 0; |
|
287
|
619 |
|
|
620 // We do want a prompt by default. |
|
1
|
621 promptflag = 1; |
|
287
|
622 |
|
|
623 // Not initially screwed by `function [...] = f (...)' syntax. |
|
1
|
624 maybe_screwed = 0; |
|
|
625 maybe_screwed_again = 0; |
|
287
|
626 |
|
|
627 // Not initially inside a loop or if statement. |
|
1
|
628 looping = 0; |
|
|
629 iffing = 0; |
|
287
|
630 |
|
|
631 // Quote marks strings intially. |
|
|
632 quote_is_transpose = 0; |
|
|
633 |
|
|
634 // Next token can be identifier. |
|
|
635 cant_be_identifier = 0; |
|
|
636 |
|
|
637 // No need to do comma insert or convert spaces to comma at beginning |
|
|
638 // of input. |
|
|
639 do_comma_insert = 0; |
|
|
640 convert_spaces_to_comma = 1; |
|
|
641 |
|
|
642 // Not initially defining a function. |
|
|
643 beginning_of_function = 0; |
|
|
644 defining_func = 0; |
|
|
645 |
|
|
646 // Not initially doing any plotting or setting of plot attributes. |
|
|
647 plotting = 0; |
|
|
648 in_plot_range = 0; |
|
|
649 past_plot_range = 0; |
|
|
650 in_plot_using = 0; |
|
|
651 in_plot_style = 0; |
|
|
652 doing_set = 0; |
|
|
653 |
|
747
|
654 // Not initially looking at indirect references. |
|
|
655 looking_at_indirect_ref = 0; |
|
|
656 |
|
287
|
657 // Error may have occurred inside some parentheses or braces. |
|
985
|
658 nesting_level.clear (); |
|
287
|
659 |
|
|
660 // Not initially defining a matrix list. |
|
|
661 braceflag = 0; |
|
1
|
662 ml.clear (); |
|
|
663 mlnm.clear (); |
|
287
|
664 |
|
|
665 // Clear out the stack of token info used to track line and column |
|
|
666 // numbers. |
|
143
|
667 while (! token_stack.empty ()) |
|
|
668 delete token_stack.pop (); |
|
287
|
669 |
|
|
670 // Can be reset by defining a function. |
|
985
|
671 if (! (reading_script_file || reading_fcn_file)) |
|
|
672 { |
|
|
673 current_input_column = 1; |
|
|
674 input_line_number = current_command_number - 1; |
|
|
675 } |
|
287
|
676 |
|
|
677 // Only ask for input from stdin if we are expecting interactive |
|
|
678 // input. |
|
338
|
679 if (interactive && ! (reading_fcn_file || get_input_from_eval_string)) |
|
287
|
680 yyrestart (stdin); |
|
991
|
681 |
|
|
682 // Delete the buffer for help text. |
|
|
683 delete [] help_buf; |
|
|
684 help_buf = 0; |
|
1
|
685 } |
|
|
686 |
|
767
|
687 // Replace backslash escapes in a string with the real values. |
|
|
688 |
|
1
|
689 static void |
|
|
690 do_string_escapes (char *s) |
|
|
691 { |
|
|
692 char *p1 = s; |
|
|
693 char *p2 = s; |
|
|
694 while (*p2 != '\0') |
|
|
695 { |
|
|
696 if (*p2 == '\\' && *(p2+1) != '\0') |
|
|
697 { |
|
|
698 switch (*++p2) |
|
|
699 { |
|
|
700 case 'a': |
|
|
701 *p1 = '\a'; |
|
|
702 break; |
|
777
|
703 |
|
1
|
704 case 'b': // backspace |
|
|
705 *p1 = '\b'; |
|
|
706 break; |
|
777
|
707 |
|
1
|
708 case 'f': // formfeed |
|
|
709 *p1 = '\f'; |
|
|
710 break; |
|
777
|
711 |
|
1
|
712 case 'n': // newline |
|
|
713 *p1 = '\n'; |
|
|
714 break; |
|
777
|
715 |
|
1
|
716 case 'r': // carriage return |
|
|
717 *p1 = '\r'; |
|
|
718 break; |
|
777
|
719 |
|
1
|
720 case 't': // horizontal tab |
|
|
721 *p1 = '\t'; |
|
|
722 break; |
|
777
|
723 |
|
1
|
724 case 'v': // vertical tab |
|
|
725 *p1 = '\v'; |
|
|
726 break; |
|
777
|
727 |
|
1
|
728 case '\\': // backslash |
|
|
729 *p1 = '\\'; |
|
|
730 break; |
|
777
|
731 |
|
1
|
732 case '\'': // quote |
|
|
733 *p1 = '\''; |
|
|
734 break; |
|
777
|
735 |
|
1
|
736 case '"': // double quote |
|
|
737 *p1 = '"'; |
|
|
738 break; |
|
777
|
739 |
|
1
|
740 default: |
|
777
|
741 warning ("unrecognized escape sequence `\\%c' --\ |
|
|
742 converting to `%c'", *p2, *p2); |
|
1
|
743 *p1 = *p2; |
|
|
744 break; |
|
|
745 } |
|
|
746 } |
|
|
747 else |
|
|
748 { |
|
|
749 *p1 = *p2; |
|
|
750 } |
|
|
751 |
|
|
752 p1++; |
|
|
753 p2++; |
|
|
754 } |
|
|
755 |
|
|
756 *p1 = '\0'; |
|
|
757 } |
|
|
758 |
|
767
|
759 // If we read some newlines, we need figure out what column we're |
|
|
760 // really looking at. |
|
|
761 |
|
1
|
762 static void |
|
|
763 fixup_column_count (char *s) |
|
|
764 { |
|
|
765 char c; |
|
|
766 while ((c = *s++) != '\0') |
|
|
767 { |
|
|
768 if (c == '\n') |
|
143
|
769 current_input_column = 1; |
|
1
|
770 else |
|
|
771 current_input_column++; |
|
|
772 } |
|
|
773 } |
|
|
774 |
|
767
|
775 // Include these so that we don't have to link to libfl.a. |
|
246
|
776 |
|
1
|
777 #ifdef yywrap |
|
|
778 #undef yywrap |
|
|
779 #endif |
|
246
|
780 static int |
|
1
|
781 yywrap (void) |
|
|
782 { |
|
287
|
783 return 1; |
|
1
|
784 } |
|
|
785 |
|
767
|
786 // These are not needed with flex-2.4.6, but may be needed with |
|
|
787 // earlier 2.4.x versions. |
|
|
788 |
|
287
|
789 #if 0 |
|
246
|
790 static void * |
|
|
791 yy_flex_alloc (int size) |
|
|
792 { |
|
|
793 return (void *) malloc ((unsigned) size); |
|
|
794 } |
|
|
795 |
|
|
796 static void * |
|
|
797 yy_flex_realloc (void *ptr, int size) |
|
|
798 { |
|
|
799 return (void *) realloc (ptr, (unsigned) size); |
|
|
800 } |
|
|
801 |
|
|
802 static void |
|
|
803 yy_flex_free (void *ptr) |
|
|
804 { |
|
|
805 free (ptr); |
|
|
806 } |
|
287
|
807 #endif |
|
246
|
808 |
|
767
|
809 // Tell us all what the current buffer is. |
|
|
810 |
|
1
|
811 YY_BUFFER_STATE |
|
|
812 current_buffer (void) |
|
|
813 { |
|
|
814 return YY_CURRENT_BUFFER; |
|
|
815 } |
|
|
816 |
|
767
|
817 // Create a new buffer. |
|
|
818 |
|
1
|
819 YY_BUFFER_STATE |
|
|
820 create_buffer (FILE *f) |
|
|
821 { |
|
|
822 return yy_create_buffer (f, YY_BUF_SIZE); |
|
|
823 } |
|
|
824 |
|
767
|
825 // Start reading a new buffer. |
|
|
826 |
|
1
|
827 void |
|
|
828 switch_to_buffer (YY_BUFFER_STATE buf) |
|
|
829 { |
|
|
830 yy_switch_to_buffer (buf); |
|
|
831 } |
|
|
832 |
|
767
|
833 // Delete a buffer. |
|
|
834 |
|
1
|
835 void |
|
|
836 delete_buffer (YY_BUFFER_STATE buf) |
|
|
837 { |
|
|
838 yy_delete_buffer (buf); |
|
|
839 } |
|
|
840 |
|
767
|
841 // Restore a buffer (for unwind-prot). |
|
|
842 |
|
1
|
843 void |
|
|
844 restore_input_buffer (void *buf) |
|
|
845 { |
|
|
846 switch_to_buffer ((YY_BUFFER_STATE) buf); |
|
|
847 } |
|
|
848 |
|
767
|
849 // Delete a buffer (for unwind-prot). |
|
|
850 |
|
1
|
851 void |
|
|
852 delete_input_buffer (void *buf) |
|
|
853 { |
|
|
854 delete_buffer ((YY_BUFFER_STATE) buf); |
|
|
855 } |
|
|
856 |
|
767
|
857 // Check to see if a character string matches any of the possible line |
|
|
858 // styles for plots. |
|
|
859 |
|
1
|
860 static char * |
|
|
861 plot_style_token (char *s) |
|
|
862 { |
|
146
|
863 static char *plot_styles[] = |
|
|
864 { |
|
925
|
865 "boxes", |
|
924
|
866 "boxerrorbars", |
|
146
|
867 "dots", |
|
|
868 "errorbars", |
|
|
869 "impulses", |
|
|
870 "lines", |
|
|
871 "linespoints", |
|
|
872 "points", |
|
926
|
873 "steps", |
|
522
|
874 0, |
|
146
|
875 }; |
|
|
876 |
|
1
|
877 char **tmp = plot_styles; |
|
522
|
878 while (*tmp) |
|
1
|
879 { |
|
|
880 if (almost_match (*tmp, s)) |
|
|
881 return *tmp; |
|
|
882 |
|
|
883 tmp++; |
|
|
884 } |
|
|
885 |
|
522
|
886 return 0; |
|
1
|
887 } |
|
|
888 |
|
767
|
889 // Check to see if a character string matches any one of the plot |
|
941
|
890 // option keywords. Don't match abbreviations for clear, since that's |
|
|
891 // not a gnuplot keyword (users will probably only expect to be able |
|
|
892 // to abbreviate actual gnuplot keywords). |
|
767
|
893 |
|
1
|
894 static int |
|
|
895 is_plot_keyword (char *s) |
|
|
896 { |
|
|
897 if (almost_match ("title", s)) |
|
146
|
898 { |
|
|
899 return TITLE; |
|
|
900 } |
|
1
|
901 else if (almost_match ("using", s)) |
|
146
|
902 { |
|
|
903 in_plot_using = 1; |
|
|
904 return USING; |
|
|
905 } |
|
1
|
906 else if (almost_match ("with", s)) |
|
146
|
907 { |
|
|
908 in_plot_style = 1; |
|
|
909 return WITH; |
|
|
910 } |
|
941
|
911 else if (strcmp ("clear", s) == 0) |
|
883
|
912 { |
|
|
913 return CLEAR; |
|
|
914 } |
|
1
|
915 else |
|
146
|
916 { |
|
|
917 return 0; |
|
|
918 } |
|
1
|
919 } |
|
|
920 |
|
767
|
921 // Handle keywords. Could probably be more efficient... |
|
|
922 |
|
1
|
923 static int |
|
|
924 is_keyword (char *s) |
|
|
925 { |
|
|
926 if (plotting && in_plot_style) |
|
|
927 { |
|
|
928 char *sty = plot_style_token (s); |
|
522
|
929 if (sty) |
|
1
|
930 { |
|
|
931 in_plot_style = 0; |
|
143
|
932 yylval.tok_val = new token (sty); |
|
|
933 token_stack.push (yylval.tok_val); |
|
1
|
934 return STYLE; |
|
|
935 } |
|
|
936 } |
|
|
937 |
|
143
|
938 int l = input_line_number; |
|
|
939 int c = current_input_column; |
|
|
940 |
|
922
|
941 // XXX FIXME XXX -- this has really become too large a list to search |
|
|
942 // like this... |
|
|
943 |
|
1
|
944 int end_found = 0; |
|
|
945 if (strcmp ("break", s) == 0) |
|
143
|
946 { |
|
191
|
947 yylval.tok_val = new token (l, c); |
|
|
948 token_stack.push (yylval.tok_val); |
|
143
|
949 return BREAK; |
|
|
950 } |
|
1
|
951 else if (strcmp ("continue", s) == 0) |
|
143
|
952 { |
|
191
|
953 yylval.tok_val = new token (l, c); |
|
|
954 token_stack.push (yylval.tok_val); |
|
143
|
955 return CONTINUE; |
|
|
956 } |
|
1
|
957 else if (strcmp ("else", s) == 0) |
|
143
|
958 { |
|
191
|
959 yylval.tok_val = new token (l, c); |
|
|
960 token_stack.push (yylval.tok_val); |
|
143
|
961 return ELSE; |
|
|
962 } |
|
1
|
963 else if (strcmp ("elseif", s) == 0) |
|
143
|
964 { |
|
191
|
965 yylval.tok_val = new token (l, c); |
|
|
966 token_stack.push (yylval.tok_val); |
|
143
|
967 return ELSEIF; |
|
|
968 } |
|
1
|
969 else if (strcmp ("end", s) == 0) |
|
143
|
970 { |
|
|
971 end_found = 1; |
|
|
972 yylval.tok_val = new token (token::simple_end, l, c); |
|
|
973 token_stack.push (yylval.tok_val); |
|
|
974 } |
|
1
|
975 else if (strcmp ("endfor", s) == 0) |
|
143
|
976 { |
|
|
977 end_found = 1; |
|
|
978 yylval.tok_val = new token (token::for_end, l, c); |
|
|
979 token_stack.push (yylval.tok_val); |
|
|
980 } |
|
1
|
981 else if (strcmp ("endfunction", s) == 0) |
|
143
|
982 { |
|
|
983 end_found = 1; |
|
|
984 yylval.tok_val = new token (token::function_end, l, c); |
|
|
985 token_stack.push (yylval.tok_val); |
|
|
986 } |
|
1
|
987 else if (strcmp ("endif", s) == 0) |
|
143
|
988 { |
|
|
989 end_found = 1; |
|
|
990 yylval.tok_val = new token (token::if_end, l, c); |
|
|
991 token_stack.push (yylval.tok_val); |
|
|
992 } |
|
1
|
993 else if (strcmp ("endwhile", s) == 0) |
|
143
|
994 { |
|
|
995 end_found = 1; |
|
|
996 yylval.tok_val = new token (token::while_end, l, c); |
|
|
997 token_stack.push (yylval.tok_val); |
|
|
998 } |
|
1
|
999 else if (strcmp ("for", s) == 0) |
|
143
|
1000 { |
|
|
1001 promptflag--; |
|
|
1002 looping++; |
|
191
|
1003 yylval.tok_val = new token (l, c); |
|
|
1004 token_stack.push (yylval.tok_val); |
|
143
|
1005 return FOR; |
|
|
1006 } |
|
1
|
1007 else if (strcmp ("function", s) == 0) |
|
|
1008 { |
|
|
1009 if (defining_func) |
|
|
1010 { |
|
191
|
1011 error ("function keyword invalid within a function body"); |
|
|
1012 |
|
338
|
1013 if ((reading_fcn_file || reading_script_file) |
|
522
|
1014 && curr_fcn_file_name) |
|
341
|
1015 error ("defining new function near line %d of file `%s.m'", |
|
|
1016 input_line_number, curr_fcn_file_name); |
|
191
|
1017 else |
|
|
1018 error ("defining new function near line %d", input_line_number); |
|
|
1019 |
|
627
|
1020 return LEXICAL_ERROR; |
|
1
|
1021 } |
|
|
1022 else |
|
|
1023 { |
|
|
1024 tmp_local_sym_tab = new symbol_table (); |
|
|
1025 curr_sym_tab = tmp_local_sym_tab; |
|
|
1026 defining_func = 1; |
|
|
1027 promptflag--; |
|
|
1028 beginning_of_function = 1; |
|
985
|
1029 if (! (reading_fcn_file || reading_script_file)) |
|
|
1030 input_line_number = 1; |
|
1
|
1031 return FCN; |
|
|
1032 } |
|
|
1033 } |
|
|
1034 else if (strcmp ("global", s) == 0) |
|
143
|
1035 { |
|
578
|
1036 yylval.tok_val = new token (l, c); |
|
|
1037 token_stack.push (yylval.tok_val); |
|
143
|
1038 return GLOBAL; |
|
|
1039 } |
|
1
|
1040 else if (strcmp ("gplot", s) == 0) |
|
143
|
1041 { |
|
|
1042 plotting = 1; |
|
|
1043 yylval.tok_val = new token (token::two_dee, l, c); |
|
476
|
1044 token_stack.push (yylval.tok_val); |
|
143
|
1045 return PLOT; |
|
|
1046 } |
|
1
|
1047 else if (strcmp ("gsplot", s) == 0) |
|
143
|
1048 { |
|
|
1049 plotting = 1; |
|
|
1050 yylval.tok_val = new token (token::three_dee, l, c); |
|
|
1051 token_stack.push (yylval.tok_val); |
|
|
1052 return PLOT; |
|
|
1053 } |
|
476
|
1054 else if (strcmp ("replot", s) == 0) |
|
|
1055 { |
|
|
1056 plotting = 1; |
|
|
1057 yylval.tok_val = new token (token::replot, l, c); |
|
|
1058 token_stack.push (yylval.tok_val); |
|
|
1059 return PLOT; |
|
|
1060 } |
|
1
|
1061 else if (strcmp ("if", s) == 0) |
|
143
|
1062 { |
|
|
1063 iffing++; |
|
|
1064 promptflag--; |
|
191
|
1065 yylval.tok_val = new token (l, c); |
|
|
1066 token_stack.push (yylval.tok_val); |
|
143
|
1067 return IF; |
|
|
1068 } |
|
1
|
1069 else if (strcmp ("return", s) == 0) |
|
143
|
1070 { |
|
191
|
1071 yylval.tok_val = new token (l, c); |
|
|
1072 token_stack.push (yylval.tok_val); |
|
143
|
1073 return FUNC_RET; |
|
|
1074 } |
|
1
|
1075 else if (strcmp ("while", s) == 0) |
|
143
|
1076 { |
|
|
1077 promptflag--; |
|
|
1078 looping++; |
|
191
|
1079 yylval.tok_val = new token (l, c); |
|
|
1080 token_stack.push (yylval.tok_val); |
|
143
|
1081 return WHILE; |
|
|
1082 } |
|
916
|
1083 else if (strcmp ("unwind_protect", s) == 0) |
|
|
1084 { |
|
|
1085 promptflag--; |
|
|
1086 yylval.tok_val = new token (l, c); |
|
|
1087 token_stack.push (yylval.tok_val); |
|
924
|
1088 return UNWIND; |
|
916
|
1089 } |
|
|
1090 else if (strcmp ("unwind_protect_cleanup", s) == 0) |
|
|
1091 { |
|
|
1092 yylval.tok_val = new token (l, c); |
|
|
1093 token_stack.push (yylval.tok_val); |
|
924
|
1094 return CLEANUP; |
|
916
|
1095 } |
|
|
1096 else if (strcmp ("end_unwind_protect", s) == 0) |
|
|
1097 { |
|
|
1098 end_found = 1; |
|
|
1099 yylval.tok_val = new token (token::unwind_protect_end, l, c); |
|
|
1100 token_stack.push (yylval.tok_val); |
|
|
1101 } |
|
922
|
1102 else if (strcmp ("all_va_args", s) == 0) |
|
|
1103 { |
|
|
1104 yylval.tok_val = new token (l, c); |
|
|
1105 token_stack.push (yylval.tok_val); |
|
|
1106 return ALL_VA_ARGS; |
|
|
1107 } |
|
1
|
1108 |
|
|
1109 if (end_found) |
|
1001
|
1110 return END; |
|
1
|
1111 |
|
|
1112 return 0; |
|
|
1113 } |
|
|
1114 |
|
767
|
1115 // Try to find an identifier. All binding to global or builtin |
|
|
1116 // variables occurs when expressions are evaluated. |
|
|
1117 |
|
1
|
1118 static symbol_record * |
|
|
1119 lookup_identifier (char *name) |
|
|
1120 { |
|
|
1121 return curr_sym_tab->lookup (name, 1, 0); |
|
|
1122 } |
|
|
1123 |
|
1019
|
1124 // Grab the help text from an function file. Always overwrites the |
|
|
1125 // current contents of help_buf. |
|
767
|
1126 |
|
1
|
1127 static void |
|
|
1128 grab_help_text (void) |
|
|
1129 { |
|
1019
|
1130 delete [] help_buf; |
|
|
1131 help_buf = 0; |
|
|
1132 |
|
|
1133 ostrstream buf; |
|
|
1134 |
|
|
1135 int in_comment = 1; |
|
|
1136 int c = 0; |
|
1
|
1137 |
|
1019
|
1138 while ((c = yyinput ()) != EOF) |
|
|
1139 { |
|
|
1140 if (in_comment) |
|
1
|
1141 { |
|
1019
|
1142 buf << (char) c; |
|
|
1143 if (c == '\n') |
|
|
1144 in_comment = 0; |
|
|
1145 } |
|
|
1146 else |
|
|
1147 { |
|
|
1148 switch (c) |
|
991
|
1149 { |
|
1019
|
1150 case '%': |
|
|
1151 case '#': |
|
|
1152 in_comment = 1; |
|
|
1153 break; |
|
777
|
1154 |
|
1019
|
1155 case ' ': |
|
|
1156 case '\t': |
|
|
1157 break; |
|
777
|
1158 |
|
1019
|
1159 default: |
|
|
1160 goto done; |
|
1
|
1161 } |
|
|
1162 } |
|
1019
|
1163 } |
|
991
|
1164 |
|
1019
|
1165 done: |
|
991
|
1166 |
|
1019
|
1167 if (c) |
|
|
1168 yyunput (c, yytext); |
|
991
|
1169 |
|
1019
|
1170 buf << ends; |
|
|
1171 |
|
|
1172 help_buf = buf.str (); |
|
991
|
1173 |
|
1019
|
1174 if (! help_buf || ! *help_buf) |
|
|
1175 { |
|
|
1176 delete [] help_buf; |
|
|
1177 help_buf = 0; |
|
1
|
1178 } |
|
|
1179 } |
|
|
1180 |
|
767
|
1181 // Return 1 if the given character matches any character in the given |
|
|
1182 // string. |
|
|
1183 |
|
1
|
1184 static int |
|
|
1185 match_any (char c, char *s) |
|
|
1186 { |
|
|
1187 char tmp; |
|
|
1188 while ((tmp = *s++) != '\0') |
|
|
1189 { |
|
|
1190 if (c == tmp) |
|
|
1191 return 1; |
|
|
1192 } |
|
|
1193 return 0; |
|
|
1194 } |
|
|
1195 |
|
767
|
1196 // Given information about the spacing surrounding an operator, |
|
|
1197 // return 1 if it looks like it should be treated as a binary |
|
|
1198 // operator. For example, |
|
|
1199 // |
|
|
1200 // [ 1 + 2 ] or [ 1+ 2] or [ 1+2 ] ==> binary |
|
|
1201 |
|
1
|
1202 static int |
|
|
1203 looks_like_bin_op (int spc_prev, int spc_next) |
|
|
1204 { |
|
608
|
1205 return ((spc_prev && spc_next) || ! spc_prev); |
|
1
|
1206 } |
|
|
1207 |
|
767
|
1208 // Duh. |
|
|
1209 |
|
1
|
1210 static int |
|
|
1211 next_char_is_space (void) |
|
|
1212 { |
|
|
1213 int c = yyinput (); |
|
|
1214 yyunput (c, yytext); |
|
|
1215 return (c == ' ' || c == '\t'); |
|
|
1216 } |
|
|
1217 |
|
767
|
1218 // Try to determine if the next token should be treated as a postfix |
|
|
1219 // unary operator. This is ugly, but it seems to do the right thing. |
|
|
1220 |
|
1
|
1221 static int |
|
|
1222 next_token_is_postfix_unary_op (int spc_prev, char *yytext) |
|
|
1223 { |
|
|
1224 int un_op = 0; |
|
|
1225 |
|
|
1226 int c0 = yyinput (); |
|
|
1227 int c1 = yyinput (); |
|
|
1228 |
|
|
1229 yyunput (c1, yytext); |
|
|
1230 yyunput (c0, yytext); |
|
|
1231 |
|
|
1232 int transpose = (c0 == '.' && c1 == '\''); |
|
|
1233 int hermitian = (c0 == '\''); |
|
|
1234 |
|
|
1235 un_op = (transpose || (hermitian && ! spc_prev)); |
|
|
1236 |
|
|
1237 return un_op; |
|
|
1238 } |
|
|
1239 |
|
767
|
1240 // Try to determine if the next token should be treated as a binary |
|
|
1241 // operator. This is even uglier, but it also seems to do the right |
|
|
1242 // thing. |
|
|
1243 |
|
1
|
1244 static int |
|
|
1245 next_token_is_bin_op (int spc_prev, char *yytext) |
|
|
1246 { |
|
|
1247 int bin_op = 0; |
|
|
1248 int spc_next = 0; |
|
|
1249 |
|
|
1250 int c0 = yyinput (); |
|
|
1251 int c1 = yyinput (); |
|
|
1252 |
|
|
1253 switch (c0) |
|
|
1254 { |
|
777
|
1255 case '+': |
|
|
1256 case '-': |
|
|
1257 case '/': |
|
|
1258 case ':': |
|
|
1259 case '\\': |
|
|
1260 case '^': |
|
1
|
1261 spc_next = (c1 == ' ' || c1 == '\t'); |
|
|
1262 break; |
|
|
1263 |
|
|
1264 case '&': |
|
|
1265 if (c1 == '&') |
|
|
1266 spc_next = next_char_is_space (); |
|
|
1267 else |
|
|
1268 spc_next = (c1 == ' ' || c1 == '\t'); |
|
|
1269 break; |
|
|
1270 |
|
|
1271 case '*': |
|
|
1272 if (c1 == '*') |
|
|
1273 spc_next = next_char_is_space (); |
|
|
1274 else |
|
|
1275 spc_next = (c1 == ' ' || c1 == '\t'); |
|
|
1276 break; |
|
|
1277 |
|
|
1278 case '|': |
|
|
1279 if (c1 == '|') |
|
|
1280 spc_next = next_char_is_space (); |
|
|
1281 else |
|
|
1282 spc_next = (c1 == ' ' || c1 == '\t'); |
|
|
1283 break; |
|
|
1284 |
|
|
1285 case '<': |
|
|
1286 if (c1 == '=' || c1 == '>') |
|
|
1287 spc_next = next_char_is_space (); |
|
|
1288 else |
|
|
1289 spc_next = (c1 == ' ' || c1 == '\t'); |
|
|
1290 break; |
|
|
1291 |
|
|
1292 case '>': |
|
|
1293 if (c1 == '=') |
|
|
1294 spc_next = next_char_is_space (); |
|
|
1295 else |
|
|
1296 spc_next = (c1 == ' ' || c1 == '\t'); |
|
|
1297 break; |
|
|
1298 |
|
777
|
1299 case '~': |
|
|
1300 case '!': |
|
|
1301 case '=': |
|
1
|
1302 if (c1 == '=') |
|
|
1303 spc_next = next_char_is_space (); |
|
|
1304 else |
|
|
1305 goto done; |
|
|
1306 break; |
|
|
1307 |
|
|
1308 case '.': |
|
|
1309 if (c1 == '*') |
|
|
1310 { |
|
|
1311 int c2 = yyinput (); |
|
|
1312 if (c2 == '*') |
|
|
1313 spc_next = next_char_is_space (); |
|
|
1314 else |
|
|
1315 spc_next = (c2 == ' ' || c2 == '\t'); |
|
|
1316 yyunput (c2, yytext); |
|
|
1317 } |
|
|
1318 else if (c1 == '/' || c1 == '\\' || c1 == '^') |
|
|
1319 spc_next = next_char_is_space (); |
|
|
1320 else |
|
|
1321 goto done; |
|
|
1322 break; |
|
|
1323 |
|
|
1324 default: |
|
|
1325 goto done; |
|
|
1326 } |
|
|
1327 |
|
|
1328 bin_op = looks_like_bin_op (spc_prev, spc_next); |
|
|
1329 |
|
|
1330 done: |
|
|
1331 yyunput (c1, yytext); |
|
|
1332 yyunput (c0, yytext); |
|
|
1333 |
|
|
1334 return bin_op; |
|
|
1335 } |
|
|
1336 |
|
767
|
1337 // Used to delete trailing white space from tokens. |
|
|
1338 |
|
146
|
1339 static char * |
|
1
|
1340 strip_trailing_whitespace (char *s) |
|
|
1341 { |
|
|
1342 char *retval = strsave (s); |
|
|
1343 |
|
|
1344 char *t = strchr (retval, ' '); |
|
522
|
1345 if (t) |
|
1
|
1346 *t = '\0'; |
|
|
1347 |
|
|
1348 t = strchr (retval, '\t'); |
|
522
|
1349 if (t) |
|
1
|
1350 *t = '\0'; |
|
|
1351 |
|
|
1352 return retval; |
|
|
1353 } |
|
|
1354 |
|
1001
|
1355 // Discard whitespace, including comments and continuations. |
|
1088
|
1356 // |
|
|
1357 // Return value is logical OR of the following values: |
|
|
1358 // |
|
|
1359 // ATE_SPACE_OR_TAB : space or tab in input |
|
|
1360 // ATE_NEWLINE : bare new line in input |
|
1001
|
1361 |
|
|
1362 static int |
|
975
|
1363 eat_whitespace (void) |
|
|
1364 { |
|
1001
|
1365 int retval = 0; |
|
975
|
1366 int in_comment = 0; |
|
|
1367 int c; |
|
|
1368 while ((c = yyinput ()) != EOF) |
|
|
1369 { |
|
|
1370 current_input_column++; |
|
|
1371 |
|
|
1372 switch (c) |
|
|
1373 { |
|
|
1374 case ' ': |
|
|
1375 case '\t': |
|
1088
|
1376 retval |= ATE_SPACE_OR_TAB; |
|
975
|
1377 break; |
|
|
1378 |
|
|
1379 case '\n': |
|
1088
|
1380 retval |= ATE_NEWLINE; |
|
975
|
1381 in_comment = 0; |
|
|
1382 current_input_column = 0; |
|
|
1383 break; |
|
|
1384 |
|
|
1385 case '#': |
|
|
1386 case '%': |
|
|
1387 in_comment = 1; |
|
|
1388 break; |
|
|
1389 |
|
1001
|
1390 case '.': |
|
|
1391 if (in_comment) |
|
|
1392 break; |
|
|
1393 else |
|
|
1394 { |
|
|
1395 if (have_ellipsis_continuation ()) |
|
|
1396 break; |
|
|
1397 else |
|
|
1398 goto done; |
|
|
1399 } |
|
|
1400 |
|
|
1401 case '\\': |
|
|
1402 if (in_comment) |
|
|
1403 break; |
|
|
1404 else |
|
|
1405 { |
|
|
1406 if (have_continuation ()) |
|
|
1407 break; |
|
|
1408 else |
|
|
1409 goto done; |
|
|
1410 } |
|
|
1411 |
|
975
|
1412 default: |
|
|
1413 if (in_comment) |
|
|
1414 break; |
|
|
1415 else |
|
|
1416 goto done; |
|
|
1417 } |
|
|
1418 } |
|
|
1419 |
|
|
1420 done: |
|
|
1421 yyunput (c, yytext); |
|
1082
|
1422 current_input_column--; |
|
1001
|
1423 return retval; |
|
975
|
1424 } |
|
|
1425 |
|
|
1426 static void |
|
972
|
1427 handle_number (char *yytext) |
|
|
1428 { |
|
|
1429 double value; |
|
|
1430 int nread = sscanf (yytext, "%lf", &value); |
|
|
1431 |
|
985
|
1432 // If yytext doesn't contain a valid number, we are in deep doo doo. |
|
|
1433 |
|
972
|
1434 assert (nread == 1); |
|
|
1435 |
|
|
1436 quote_is_transpose = 1; |
|
|
1437 cant_be_identifier = 1; |
|
|
1438 convert_spaces_to_comma = 1; |
|
|
1439 |
|
|
1440 if (plotting && ! in_plot_range) |
|
|
1441 past_plot_range = 1; |
|
|
1442 |
|
|
1443 yylval.tok_val = new token (value, yytext, input_line_number, |
|
|
1444 current_input_column); |
|
|
1445 |
|
|
1446 token_stack.push (yylval.tok_val); |
|
|
1447 |
|
|
1448 current_input_column += yyleng; |
|
|
1449 |
|
|
1450 do_comma_insert_check (); |
|
|
1451 } |
|
|
1452 |
|
1001
|
1453 // We have seen a backslash and need to find out if it should be |
|
|
1454 // treated as a continuation character. If so, this eats it, up to |
|
|
1455 // and including the new line character. |
|
|
1456 // |
|
973
|
1457 // Match whitespace only, followed by a comment character or newline. |
|
|
1458 // Once a comment character is found, discard all input until newline. |
|
|
1459 // If non-whitespace characters are found before comment |
|
|
1460 // characters, return 0. Otherwise, return 1. |
|
|
1461 |
|
|
1462 static int |
|
1091
|
1463 have_continuation (int trailing_comments_ok) |
|
973
|
1464 { |
|
|
1465 ostrstream buf; |
|
|
1466 |
|
|
1467 int in_comment = 0; |
|
|
1468 char c; |
|
|
1469 while ((c = yyinput ()) != EOF) |
|
|
1470 { |
|
|
1471 buf << (char) c; |
|
|
1472 |
|
|
1473 switch (c) |
|
|
1474 { |
|
|
1475 case ' ': |
|
|
1476 case '\t': |
|
|
1477 break; |
|
|
1478 |
|
|
1479 case '%': |
|
|
1480 case '#': |
|
1091
|
1481 if (trailing_comments_ok) |
|
|
1482 in_comment = 1; |
|
|
1483 else |
|
|
1484 goto cleanup; |
|
973
|
1485 break; |
|
|
1486 |
|
|
1487 case '\n': |
|
975
|
1488 current_input_column = 0; |
|
1001
|
1489 promptflag--; |
|
973
|
1490 return 1; |
|
|
1491 |
|
|
1492 default: |
|
1091
|
1493 if (! in_comment) |
|
|
1494 goto cleanup; |
|
|
1495 break; |
|
973
|
1496 } |
|
|
1497 } |
|
|
1498 |
|
|
1499 yyunput (c, yytext); |
|
1091
|
1500 return 0; |
|
973
|
1501 |
|
1091
|
1502 cleanup: |
|
|
1503 buf << ends; |
|
|
1504 char *s = buf.str (); |
|
|
1505 if (s) |
|
|
1506 { |
|
|
1507 int len = strlen (s); |
|
|
1508 while (len--) |
|
|
1509 yyunput (s[len], yytext); |
|
|
1510 } |
|
|
1511 delete [] s; |
|
973
|
1512 return 0; |
|
|
1513 } |
|
|
1514 |
|
1001
|
1515 // We have seen a `.' and need to see if it is the start of a |
|
|
1516 // continuation. If so, this eats it, up to and including the new |
|
|
1517 // line character. |
|
|
1518 |
|
973
|
1519 static int |
|
1091
|
1520 have_ellipsis_continuation (int trailing_comments_ok) |
|
973
|
1521 { |
|
|
1522 char c1 = yyinput (); |
|
|
1523 if (c1 == '.') |
|
|
1524 { |
|
|
1525 char c2 = yyinput (); |
|
1091
|
1526 if (c2 == '.' && have_continuation (trailing_comments_ok)) |
|
973
|
1527 return 1; |
|
|
1528 else |
|
|
1529 { |
|
|
1530 yyunput (c2, yytext); |
|
|
1531 yyunput (c1, yytext); |
|
|
1532 } |
|
|
1533 } |
|
|
1534 else |
|
|
1535 yyunput (c1, yytext); |
|
|
1536 |
|
|
1537 return 0; |
|
|
1538 } |
|
|
1539 |
|
1001
|
1540 // See if we have a continuation line. If so, eat it and the leading |
|
|
1541 // whitespace on the next line. |
|
1088
|
1542 // |
|
|
1543 // Return value is the same as described for eat_whitespace(). |
|
1001
|
1544 |
|
|
1545 static int |
|
|
1546 eat_continuation (void) |
|
|
1547 { |
|
|
1548 int retval = 0; |
|
|
1549 int c = yyinput (); |
|
|
1550 if ((c == '.' && have_ellipsis_continuation ()) |
|
|
1551 || (c == '\\' && have_continuation ())) |
|
|
1552 retval = eat_whitespace (); |
|
|
1553 else |
|
|
1554 yyunput (c, yytext); |
|
|
1555 |
|
|
1556 return retval; |
|
|
1557 } |
|
|
1558 |
|
973
|
1559 static int |
|
975
|
1560 handle_string (char delim, int text_style) |
|
973
|
1561 { |
|
|
1562 ostrstream buf; |
|
|
1563 |
|
|
1564 int c; |
|
1031
|
1565 int escape_pending = 0; |
|
973
|
1566 |
|
|
1567 while ((c = yyinput ()) != EOF) |
|
|
1568 { |
|
|
1569 current_input_column++; |
|
|
1570 |
|
|
1571 if (c == '\\') |
|
|
1572 { |
|
1053
|
1573 if (escape_pending) |
|
|
1574 { |
|
|
1575 buf << (char) c; |
|
|
1576 escape_pending = 0; |
|
|
1577 } |
|
|
1578 else |
|
|
1579 { |
|
1091
|
1580 if (have_continuation (0)) |
|
1053
|
1581 escape_pending = 0; |
|
|
1582 else |
|
|
1583 { |
|
|
1584 buf << (char) c; |
|
|
1585 escape_pending = 1; |
|
|
1586 } |
|
|
1587 } |
|
1031
|
1588 continue; |
|
973
|
1589 } |
|
|
1590 else if (c == '.') |
|
|
1591 { |
|
1091
|
1592 if (! have_ellipsis_continuation (0)) |
|
973
|
1593 buf << (char) c; |
|
|
1594 } |
|
|
1595 else if (c == '\n') |
|
|
1596 { |
|
1053
|
1597 error ("unterminated string constant"); |
|
973
|
1598 break; |
|
|
1599 } |
|
|
1600 else if (c == delim) |
|
|
1601 { |
|
1031
|
1602 if (escape_pending) |
|
973
|
1603 buf << (char) c; |
|
|
1604 else |
|
|
1605 { |
|
|
1606 c = yyinput (); |
|
|
1607 if (c == delim) |
|
|
1608 buf << (char) c; |
|
|
1609 else |
|
|
1610 { |
|
|
1611 yyunput (c, yytext); |
|
|
1612 buf << ends; |
|
|
1613 char *tok = buf.str (); |
|
|
1614 do_string_escapes (tok); |
|
975
|
1615 |
|
|
1616 if (text_style && doing_set) |
|
|
1617 { |
|
|
1618 if (tok) |
|
|
1619 { |
|
|
1620 int len = strlen (tok) + 3; |
|
|
1621 char *tmp = tok; |
|
|
1622 tok = new char [len]; |
|
|
1623 tok[0] = delim; |
|
|
1624 strcpy (tok+1, tmp); |
|
|
1625 tok[len-2] = delim; |
|
|
1626 tok[len-1] = '\0'; |
|
|
1627 delete [] tmp; |
|
|
1628 } |
|
|
1629 } |
|
|
1630 else |
|
|
1631 { |
|
|
1632 quote_is_transpose = 1; |
|
|
1633 cant_be_identifier = 1; |
|
|
1634 convert_spaces_to_comma = 1; |
|
|
1635 } |
|
|
1636 |
|
973
|
1637 yylval.tok_val = new token (tok); |
|
|
1638 delete [] tok; |
|
|
1639 token_stack.push (yylval.tok_val); |
|
|
1640 return TEXT; |
|
|
1641 } |
|
|
1642 } |
|
|
1643 } |
|
|
1644 else |
|
|
1645 { |
|
|
1646 buf << (char) c; |
|
|
1647 } |
|
|
1648 |
|
1031
|
1649 escape_pending = 0; |
|
973
|
1650 } |
|
|
1651 |
|
|
1652 return LEXICAL_ERROR; |
|
|
1653 } |
|
|
1654 |
|
971
|
1655 static int |
|
1001
|
1656 handle_close_brace (int spc_gobbled) |
|
971
|
1657 { |
|
985
|
1658 if (! nesting_level.empty ()) |
|
971
|
1659 { |
|
985
|
1660 nesting_level.pop (); |
|
971
|
1661 braceflag--; |
|
|
1662 } |
|
|
1663 |
|
|
1664 if (braceflag == 0) |
|
1001
|
1665 BEGIN 0; |
|
|
1666 |
|
971
|
1667 int c1 = yyinput (); |
|
|
1668 if (c1 == '=') |
|
|
1669 { |
|
|
1670 quote_is_transpose = 0; |
|
|
1671 cant_be_identifier = 0; |
|
|
1672 convert_spaces_to_comma = 1; |
|
|
1673 |
|
|
1674 int c2 = yyinput (); |
|
|
1675 unput (c2); |
|
|
1676 unput (c1); |
|
|
1677 |
|
|
1678 if (c2 != '=' && maybe_screwed_again) |
|
|
1679 return SCREW_TWO; |
|
|
1680 else |
|
|
1681 return ']'; |
|
|
1682 } |
|
|
1683 else |
|
|
1684 { |
|
|
1685 unput (c1); |
|
|
1686 |
|
985
|
1687 if (braceflag && user_pref.whitespace_in_literal_matrix != 2) |
|
971
|
1688 { |
|
1001
|
1689 int bin_op = next_token_is_bin_op (spc_gobbled, yytext); |
|
971
|
1690 int postfix_un_op = next_token_is_postfix_unary_op |
|
1001
|
1691 (spc_gobbled, yytext); |
|
971
|
1692 |
|
|
1693 int other_op = match_any (c1, ",;\n]"); |
|
|
1694 |
|
|
1695 if (! (postfix_un_op || bin_op || other_op |
|
985
|
1696 || nesting_level.empty ()) |
|
|
1697 && nesting_level.top () == BRACE |
|
971
|
1698 && convert_spaces_to_comma) |
|
|
1699 { |
|
|
1700 unput (','); |
|
|
1701 return ']'; |
|
|
1702 } |
|
|
1703 } |
|
|
1704 } |
|
|
1705 |
|
|
1706 quote_is_transpose = 1; |
|
|
1707 cant_be_identifier = 0; |
|
|
1708 convert_spaces_to_comma = 1; |
|
|
1709 return ']'; |
|
|
1710 } |
|
|
1711 |
|
1072
|
1712 static void |
|
|
1713 maybe_unput_comma (int spc_gobbled) |
|
|
1714 { |
|
|
1715 if (user_pref.whitespace_in_literal_matrix != 2 |
|
|
1716 && ! nesting_level.empty () |
|
|
1717 && nesting_level.top () == BRACE) |
|
|
1718 { |
|
|
1719 int bin_op = next_token_is_bin_op (spc_gobbled, yytext); |
|
|
1720 |
|
|
1721 int postfix_un_op = next_token_is_postfix_unary_op (spc_gobbled, |
|
|
1722 yytext); |
|
|
1723 |
|
|
1724 int c1 = yyinput (); |
|
|
1725 int c2 = yyinput (); |
|
|
1726 unput (c2); |
|
|
1727 unput (c1); |
|
|
1728 int sep_op = match_any (c1, ",;\n]"); |
|
|
1729 int dot_op = (c1 == '.' |
|
|
1730 && (isalpha (c2) || isspace (c2) || c2 == '_')); |
|
|
1731 int index_op = (c1 == '(' |
|
|
1732 && (user_pref.whitespace_in_literal_matrix == 0 |
|
|
1733 || ! spc_gobbled)); |
|
|
1734 |
|
|
1735 if (! (postfix_un_op || bin_op || sep_op || dot_op || index_op)) |
|
|
1736 unput (','); |
|
|
1737 } |
|
|
1738 } |
|
|
1739 |
|
767
|
1740 // Figure out exactly what kind of token to return when we have seen |
|
|
1741 // an identifier. Handles keywords. |
|
|
1742 |
|
146
|
1743 static int |
|
1001
|
1744 handle_identifier (char *tok, int spc_gobbled) |
|
146
|
1745 { |
|
883
|
1746 // It is almost always an error for an identifier to be followed |
|
|
1747 // directly by another identifier. Special cases are handled below. |
|
|
1748 |
|
|
1749 cant_be_identifier = 1; |
|
|
1750 |
|
747
|
1751 // If we are expecting a structure element, we just want to return |
|
1072
|
1752 // TEXT_ID, which is a string that is also a valid identifier. But |
|
|
1753 // first, we have to decide whether to insert a comma. |
|
747
|
1754 |
|
|
1755 if (looking_at_indirect_ref) |
|
1072
|
1756 { |
|
|
1757 maybe_unput_comma (spc_gobbled); |
|
|
1758 TOK_PUSH_AND_RETURN (tok, TEXT_ID); |
|
|
1759 } |
|
747
|
1760 |
|
883
|
1761 // If we have a regular keyword, or a plot STYLE, return it. Keywords |
|
|
1762 // can be followed by identifiers (TOK_RETURN handles that). |
|
146
|
1763 |
|
|
1764 int kw_token = is_keyword (tok); |
|
|
1765 if (kw_token) |
|
|
1766 { |
|
|
1767 if (kw_token == STYLE) |
|
|
1768 { |
|
1060
|
1769 current_input_column += yyleng; |
|
146
|
1770 quote_is_transpose = 0; |
|
|
1771 convert_spaces_to_comma = 1; |
|
|
1772 return kw_token; |
|
|
1773 } |
|
|
1774 else |
|
|
1775 TOK_RETURN (kw_token); |
|
|
1776 } |
|
|
1777 |
|
883
|
1778 // See if we have a plot keyword (title, using, with, or clear). |
|
146
|
1779 |
|
941
|
1780 if (plotting) |
|
|
1781 { |
|
146
|
1782 // Yes, we really do need both of these plot_range variables. One |
|
|
1783 // is used to mark when we are past all possiblity of a plot range, |
|
|
1784 // the other is used to mark when we are actually between the square |
|
|
1785 // brackets that surround the range. |
|
|
1786 |
|
941
|
1787 if (! in_plot_range) |
|
|
1788 past_plot_range = 1; |
|
|
1789 |
|
|
1790 int plot_option_kw = is_plot_keyword (tok); |
|
|
1791 |
|
|
1792 if (cant_be_identifier && plot_option_kw) |
|
|
1793 TOK_RETURN (plot_option_kw); |
|
|
1794 } |
|
146
|
1795 |
|
|
1796 // If we are looking at a text style function, set up to gobble its |
|
|
1797 // arguments. These are also reserved words, but only because it |
|
|
1798 // would be very difficult to do anything intelligent with them if |
|
|
1799 // they were not reserved. |
|
|
1800 |
|
|
1801 if (is_text_function_name (tok)) |
|
|
1802 { |
|
|
1803 BEGIN TEXT_FCN; |
|
|
1804 |
|
169
|
1805 if (strcmp (tok, "help") == 0) |
|
146
|
1806 BEGIN HELP_FCN; |
|
|
1807 else if (strcmp (tok, "set") == 0) |
|
|
1808 doing_set = 1; |
|
|
1809 } |
|
|
1810 |
|
1001
|
1811 int c = yyinput (); |
|
|
1812 yyunput (c, yytext); |
|
|
1813 int next_tok_is_eq = (c == '='); |
|
|
1814 |
|
146
|
1815 // Make sure we put the return values of a function in the symbol |
|
|
1816 // table that is local to the function. |
|
|
1817 |
|
|
1818 if (next_tok_is_eq && defining_func && maybe_screwed) |
|
|
1819 curr_sym_tab = tmp_local_sym_tab; |
|
|
1820 |
|
|
1821 // Find the token in the symbol table. |
|
|
1822 |
|
|
1823 yylval.tok_val = new token (lookup_identifier (tok), |
|
|
1824 input_line_number, |
|
|
1825 current_input_column); |
|
|
1826 |
|
|
1827 token_stack.push (yylval.tok_val); |
|
|
1828 |
|
|
1829 // After seeing an identifer, it is ok to convert spaces to a comma |
|
|
1830 // (if needed). |
|
|
1831 |
|
|
1832 convert_spaces_to_comma = 1; |
|
|
1833 |
|
|
1834 // If we are defining a function and we have not seen the parameter |
|
|
1835 // list yet and the next token is `=', return a token that represents |
|
|
1836 // the only return value for the function. For example, |
|
|
1837 // |
|
|
1838 // function SCREW = f (args); |
|
|
1839 // |
|
|
1840 // The variable maybe_screwed is reset in parse.y. |
|
|
1841 |
|
|
1842 if (next_tok_is_eq) |
|
|
1843 { |
|
1060
|
1844 current_input_column += yyleng; |
|
146
|
1845 if (defining_func && maybe_screwed) |
|
|
1846 return SCREW; |
|
|
1847 else |
|
|
1848 return NAME; |
|
|
1849 } |
|
|
1850 |
|
|
1851 // At this point, we are only dealing with identifiers that are not |
|
|
1852 // followed by `=' (if the next token is `=', there is no need to |
|
|
1853 // check to see if we should insert a comma (invalid syntax), or allow |
|
|
1854 // a following `'' to be treated as a transpose (the next token is |
|
|
1855 // `=', so it can't be `''. |
|
|
1856 |
|
|
1857 quote_is_transpose = 1; |
|
|
1858 do_comma_insert_check (); |
|
|
1859 |
|
1072
|
1860 maybe_unput_comma (spc_gobbled); |
|
146
|
1861 |
|
1060
|
1862 current_input_column += yyleng; |
|
146
|
1863 return NAME; |
|
|
1864 } |
|
|
1865 |
|
767
|
1866 // Print a warning if a function file that defines a function has |
|
|
1867 // anything other than comments and whitespace following the END token |
|
|
1868 // that matches the FUNCTION statement. |
|
|
1869 |
|
1
|
1870 void |
|
|
1871 check_for_garbage_after_fcn_def (void) |
|
|
1872 { |
|
|
1873 // By making a newline be the next character to be read, we will force |
|
|
1874 // the parser to return after reading the function. Calling yyunput |
|
|
1875 // with EOF seems not to work... |
|
|
1876 |
|
|
1877 int in_comment = 0; |
|
|
1878 int lineno = input_line_number; |
|
|
1879 int c; |
|
|
1880 while ((c = yyinput ()) != EOF) |
|
|
1881 { |
|
|
1882 switch (c) |
|
|
1883 { |
|
|
1884 case ' ': |
|
|
1885 case '\t': |
|
|
1886 case ';': |
|
|
1887 case ',': |
|
|
1888 break; |
|
777
|
1889 |
|
1
|
1890 case '\n': |
|
|
1891 if (in_comment) |
|
|
1892 in_comment = 0; |
|
|
1893 break; |
|
777
|
1894 |
|
1
|
1895 case '%': |
|
|
1896 case '#': |
|
|
1897 in_comment = 1; |
|
|
1898 break; |
|
777
|
1899 |
|
1
|
1900 default: |
|
|
1901 if (in_comment) |
|
|
1902 break; |
|
|
1903 else |
|
|
1904 { |
|
|
1905 warning ("ignoring trailing garbage after end of function\n\ |
|
341
|
1906 near line %d of file `%s.m'", lineno, curr_fcn_file_name); |
|
1
|
1907 |
|
|
1908 yyunput ('\n', yytext); |
|
|
1909 return; |
|
|
1910 } |
|
|
1911 } |
|
|
1912 } |
|
|
1913 yyunput ('\n', yytext); |
|
|
1914 } |
|
|
1915 |
|
767
|
1916 /* |
|
|
1917 |
|
|
1918 Maybe someday... |
|
1
|
1919 |
|
|
1920 "+=" return ADD_EQ; |
|
|
1921 "-=" return SUB_EQ; |
|
|
1922 "*=" return MUL_EQ; |
|
|
1923 "/=" return DIV_EQ; |
|
|
1924 "\\=" return LEFTDIV_EQ; |
|
|
1925 ".+=" return ADD_EQ; |
|
|
1926 ".-=" return SUB_EQ; |
|
|
1927 ".*=" return EMUL_EQ; |
|
|
1928 "./=" return EDIV_EQ; |
|
|
1929 ".\\=" return ELEFTDIV_EQ; |
|
|
1930 |
|
|
1931 */ |
