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1
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1 /* lex.l -*- C -*- |
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2 |
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3 Copyright (C) 1992, 1993 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 COMMENT |
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24 %x NEW_MATRIX |
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25 %x HELP_FCN |
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26 %s TEXT_FCN |
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27 %s DQSTRING |
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28 %s STRING |
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29 %s MATRIX |
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30 |
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31 %{ |
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32 |
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33 // Arrange to get input via readline. |
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34 |
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35 #ifdef YY_INPUT |
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36 #undef YY_INPUT |
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37 #define YY_INPUT(buf,result,max_size) \ |
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38 if ((result = octave_read (buf, max_size)) < 0) \ |
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39 YY_FATAL_ERROR ("octave_read () in flex scanner failed"); |
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40 #endif |
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41 |
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42 // Try to avoid crashing out completely on fatal scanner errors. |
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43 |
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44 #ifdef YY_FATAL_ERROR |
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45 #undef YY_FATAL_ERROR |
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46 #define YY_FATAL_ERROR(msg) \ |
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47 do \ |
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48 { \ |
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49 error (msg); \ |
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50 jump_to_top_level (); \ |
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51 } \ |
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52 while (0) |
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53 #endif |
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54 |
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55 #include "input.h" |
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56 |
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57 // The type of an END token. This declaration is repeated in parse.y. |
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58 // It must appear before y.tab.h is included. |
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59 enum end_tok_type |
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60 { |
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61 simple_end, |
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62 for_end, |
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63 function_end, |
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64 if_end, |
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65 while_end, |
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66 }; |
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67 |
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68 // The type of a PLOT token. This declaration is repeated in parse.y. |
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69 // It must appear before y.tab.h is included. |
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70 enum plot_tok_type |
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71 { |
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72 two_dee = 2, |
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73 three_dee = 3, |
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74 }; |
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75 |
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76 #include "SLStack.h" |
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77 |
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78 #include "variables.h" |
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79 #include "symtab.h" |
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80 #include "error.h" |
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81 #include "utils.h" |
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82 #include "tree.h" |
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83 #include "y.tab.h" |
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84 #include "parse.h" |
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85 #include "lex.h" |
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86 |
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87 // Nonzero means we thing we are looking at the beginning of a |
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88 // function definition. |
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89 static int beginning_of_function = 0; |
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90 |
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91 // Nonzero means we think we are looking at a set command. |
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92 static int doing_set = 0; |
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93 |
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94 // GAG. Stupid kludge so that [[1,2][3,4]] will work. |
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95 static do_comma_insert = 0; |
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96 |
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97 // Brace level count. |
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98 static int braceflag = 0; |
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99 |
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100 // Return transpose or start a string? |
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101 static int quote_is_transpose = 0; |
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102 |
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103 // Nonzero means that we should convert spaces to a comma inside a |
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104 // matrix definition. |
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105 static int convert_spaces_to_comma = 1; |
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106 |
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107 // Another context hack, this time for the plot command's `using', |
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108 // `title', and `with' keywords. |
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109 static int cant_be_identifier = 0; |
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110 |
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111 // Is the closest nesting level a square brace or a paren? |
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112 // |
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113 // 1 -> brace, spaces are important (they can turn into commas) |
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114 // 0 -> paren, spaces are not important |
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115 // |
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116 static SLStack <int> in_brace_or_paren; |
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117 |
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118 static void do_string_escapes (char *s); |
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119 static void fixup_column_count (char *s); |
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120 static int do_comma_insert_check (void); |
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121 static int is_plot_keyword (char *s); |
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122 static int is_keyword (char *s); |
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123 static char *plot_style_token (char *s); |
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124 static symbol_record *lookup_identifier (char *s); |
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125 static void grab_help_text (void); |
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126 static int match_any (char c, char *s); |
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127 static int next_token_is_bin_op (int spc_prev, char *yytext); |
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128 static int next_token_is_postfix_unary_op (int spc_prev, char *yytext); |
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129 static char *strip_trailing_whitespace (char *s); |
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130 |
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131 #define DO_COMMA_INSERT_CHECK yyless (do_comma_insert_check ()) |
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132 |
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133 #define RETURN(token) \ |
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134 do \ |
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135 { \ |
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136 current_input_column += yyleng; \ |
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137 quote_is_transpose = 0; \ |
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138 cant_be_identifier = 0; \ |
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139 convert_spaces_to_comma = 1; \ |
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140 return (token); \ |
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141 } \ |
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142 while (0) |
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143 |
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144 #define BIN_OP_RETURN(token) \ |
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145 do \ |
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146 { \ |
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147 current_input_column += yyleng; \ |
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148 quote_is_transpose = 0; \ |
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149 cant_be_identifier = 0; \ |
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150 convert_spaces_to_comma = 0; \ |
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151 return (token); \ |
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152 } \ |
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153 while (0) |
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154 |
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155 %} |
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156 |
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157 D [0-9] |
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158 S [ \t] |
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159 N [\n] |
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160 SN [ \t\n] |
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161 EL (\.\.\.) |
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162 Im [iIjJ] |
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163 QQ (\'\') |
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164 ECHAR (\\.) |
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165 QSTR ([^\n\'\\]*({QQ}|{ECHAR})*) |
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166 DQSTR ([^\n\"\\]*{ECHAR}*) |
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167 IDENT ([_a-zA-Z][_a-zA-Z0-9]*) |
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168 EXPON ([DdEe][+-]?{D}+) |
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169 %% |
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170 |
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171 \% | |
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172 \# { |
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173 if (beginning_of_function) |
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174 { |
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175 grab_help_text (); |
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176 beginning_of_function = 0; |
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177 } |
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178 |
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179 BEGIN COMMENT; |
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180 current_input_column += yyleng; |
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181 } |
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182 |
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183 <COMMENT>\n { |
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184 BEGIN 0; |
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185 current_input_column = 0; |
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186 quote_is_transpose = 0; |
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187 cant_be_identifier = 0; |
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188 convert_spaces_to_comma = 1; |
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189 return '\n'; |
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190 } |
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191 |
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192 <COMMENT><<EOF>> { RETURN (END_OF_INPUT); } |
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193 |
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194 <COMMENT>.*$ { current_input_column += yyleng; } |
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195 |
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196 <NEW_MATRIX>[^ \t\n] { |
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197 yyless (0); |
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198 BEGIN MATRIX; |
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199 } |
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200 |
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201 <NEW_MATRIX>{SN}* { |
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202 fixup_column_count (yytext); |
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203 BEGIN MATRIX; |
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204 } |
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205 |
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206 <HELP_FCN>\n | |
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207 <TEXT_FCN>\n { |
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208 BEGIN 0; |
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209 current_input_column = 0; |
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210 quote_is_transpose = 0; |
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211 cant_be_identifier = 0; |
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212 convert_spaces_to_comma = 1; |
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213 return '\n'; |
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214 } |
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215 |
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216 <TEXT_FCN>[\;\,] { |
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217 if (doing_set) |
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218 { |
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219 yylval.string = strsave (yytext); |
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220 RETURN (TEXT); |
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221 } |
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222 else |
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223 { |
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224 BEGIN 0; |
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225 RETURN (','); |
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226 } |
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227 } |
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228 |
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229 <HELP_FCN>[^ \t\n]*{S}* | |
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230 <TEXT_FCN>[^ \t\n\;\,]*{S}* { |
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231 |
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232 static char *tok = (char *) NULL; |
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233 delete [] tok; |
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234 tok = strip_trailing_whitespace (yytext); |
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235 |
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236 yylval.string = strsave (tok); |
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237 RETURN (TEXT); |
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238 } |
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239 |
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240 <TEXT_FCN>\'{QSTR}*[\n\'] { |
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241 if (yytext[yyleng-1] == '\n') |
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242 { |
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243 error ("unterminated string constant"); |
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244 current_input_column = 0; |
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245 jump_to_top_level (); |
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246 } |
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247 else |
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248 { |
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249 int off1 = doing_set ? 0 : 1; |
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250 int off2 = doing_set ? 0 : 2; |
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251 yylval.string = strsave (&yytext[off1]); |
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252 yylval.string[yyleng-off2] = '\0'; |
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253 current_input_column += yyleng; |
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254 } |
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255 do_string_escapes (yylval.string); |
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256 return TEXT; |
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257 } |
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258 |
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259 <TEXT_FCN>\"{DQSTR}*[\n\"] { |
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260 if (yytext[yyleng-1] == '\n') |
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261 { |
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262 error ("unterminated string constant"); |
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263 current_input_column = 0; |
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264 jump_to_top_level (); |
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265 } |
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266 else |
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267 { |
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268 int off1 = doing_set ? 0 : 1; |
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269 int off2 = doing_set ? 0 : 2; |
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270 yylval.string = strsave (&yytext[off1]); |
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271 yylval.string[yyleng-off2] = '\0'; |
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272 current_input_column += yyleng; |
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273 } |
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274 do_string_escapes (yylval.string); |
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275 return TEXT; |
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276 } |
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277 |
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278 <TEXT_FCN>{S}* { current_input_column += yyleng; } |
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279 |
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280 <STRING>{QSTR}*[\n\'] { |
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281 if (braceflag) |
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282 BEGIN MATRIX; |
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283 else |
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284 BEGIN 0; |
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285 |
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286 if (yytext[yyleng-1] == '\n') |
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287 { |
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288 error ("unterminated string constant"); |
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289 current_input_column = 0; |
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290 jump_to_top_level (); |
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291 } |
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292 else |
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293 { |
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294 yylval.string = strsave (yytext); |
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295 yylval.string[yyleng-1] = '\0'; |
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296 current_input_column += yyleng; |
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297 } |
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298 do_string_escapes (yylval.string); |
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299 quote_is_transpose = 1; |
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300 cant_be_identifier = 1; |
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301 convert_spaces_to_comma = 1; |
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302 return TEXT; |
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303 } |
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304 |
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305 |
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306 <DQSTRING>{DQSTR}*[\n\"] { |
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307 if (braceflag) |
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308 BEGIN MATRIX; |
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309 else |
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310 BEGIN 0; |
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311 |
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312 if (yytext[yyleng-1] == '\n') |
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313 { |
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314 error ("unterminated string constant"); |
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315 current_input_column = 0; |
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316 jump_to_top_level (); |
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317 } |
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318 else |
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319 { |
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320 yylval.string = strsave (yytext); |
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321 yylval.string[yyleng-1] = '\0'; |
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322 current_input_column += yyleng; |
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323 } |
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324 do_string_escapes (yylval.string); |
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325 quote_is_transpose = 1; |
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326 cant_be_identifier = 1; |
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327 convert_spaces_to_comma = 1; |
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328 return TEXT; |
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329 } |
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330 |
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331 <MATRIX>{SN}*\]{S}*/== { |
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332 |
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333 // For this and the next two rules, we're looking at ']', and we |
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334 // need to know if the next token is '='. |
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335 // |
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336 // All this so we can handle the bogus syntax |
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337 // |
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338 // [x,y] % an expression by itself |
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339 // [x,y] = expression % assignment to a list of identifiers |
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340 // [x,y] == expression % test for equality |
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341 // |
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342 // It would have been so much easier if the delimiters were simply |
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343 // different for the expression on the left hand side of the equals |
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344 // operator. |
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345 |
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346 in_brace_or_paren.pop (); |
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347 braceflag--; |
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348 if (braceflag == 0) |
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349 { |
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350 if (!defining_func) |
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351 promptflag++; |
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352 BEGIN 0; |
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353 } |
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354 fixup_column_count (yytext); |
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355 quote_is_transpose = 0; |
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356 cant_be_identifier = 0; |
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357 convert_spaces_to_comma = 1; |
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358 return ']'; |
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359 } |
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360 |
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361 <MATRIX>{SN}*\]{S}*/= { |
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362 in_brace_or_paren.pop (); |
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363 braceflag--; |
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364 if (braceflag == 0) |
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365 { |
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366 BEGIN 0; |
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367 if (!defining_func) |
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368 promptflag++; |
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369 } |
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370 fixup_column_count (yytext); |
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371 quote_is_transpose = 0; |
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372 cant_be_identifier = 0; |
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373 convert_spaces_to_comma = 1; |
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374 if (maybe_screwed_again) |
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375 return SCREW_TWO; |
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376 else |
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377 return ']'; |
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378 } |
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379 |
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380 <MATRIX>{SN}*\]{S}* { |
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381 fixup_column_count (yytext); |
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382 |
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383 in_brace_or_paren.pop (); |
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384 braceflag--; |
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385 if (braceflag == 0) |
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386 { |
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387 if (!defining_func) |
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388 promptflag++; |
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389 BEGIN 0; |
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390 } |
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391 else |
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392 { |
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393 int c0 = yytext[yyleng-1]; |
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394 int spc_prev = (c0 == ' ' || c0 == '\t'); |
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395 int bin_op = next_token_is_bin_op (spc_prev, |
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396 yytext); |
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397 int postfix_un_op |
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398 = next_token_is_postfix_unary_op (spc_prev, |
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399 yytext); |
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400 |
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401 int c1 = yyinput (); |
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402 unput (c1); |
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403 int other_op = match_any (c1, ",;\n]"); |
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404 |
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405 if (! (postfix_un_op || bin_op || other_op) |
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406 && in_brace_or_paren.top () |
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407 && convert_spaces_to_comma) |
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408 { |
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409 unput (','); |
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410 return ']'; |
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411 } |
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412 } |
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413 |
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414 quote_is_transpose = 1; |
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415 cant_be_identifier = 0; |
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416 convert_spaces_to_comma = 1; |
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417 return ']'; |
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418 } |
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419 |
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420 <MATRIX>{S}*\,{S}* { RETURN (','); } |
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421 |
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422 <MATRIX>{S}+ { |
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423 int bin_op = next_token_is_bin_op (1, yytext); |
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424 int postfix_un_op |
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425 = next_token_is_postfix_unary_op (1, yytext); |
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426 |
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427 if (! (postfix_un_op || bin_op) |
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428 && in_brace_or_paren.top () |
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429 && convert_spaces_to_comma) |
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430 RETURN (','); |
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431 } |
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432 |
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433 <MATRIX>{SN}*\;{SN}* | |
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434 <MATRIX>{N}{SN}* { |
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435 fixup_column_count (yytext); |
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436 quote_is_transpose = 0; |
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437 cant_be_identifier = 0; |
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438 convert_spaces_to_comma = 1; |
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439 return ';'; |
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440 } |
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441 |
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442 \] { |
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443 if (! in_brace_or_paren.empty ()) |
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444 in_brace_or_paren.pop (); |
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445 |
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113
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446 if (plotting && ! past_plot_range) |
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1
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447 { |
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448 in_plot_range = 0; |
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449 RETURN (CLOSE_BRACE); |
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450 } |
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451 else |
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452 RETURN (']'); |
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453 } |
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454 |
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455 {D}+{EXPON}?{Im} | |
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456 {D}+\.{D}*{EXPON}?{Im} | |
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457 \.{D}+{EXPON}?{Im} { |
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458 int nread = sscanf (yytext, "%lf", &(yylval.number)); |
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459 assert (nread == 1); |
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460 quote_is_transpose = 1; |
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461 cant_be_identifier = 1; |
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462 convert_spaces_to_comma = 1; |
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113
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463 if (plotting && ! in_plot_range) |
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464 past_plot_range = 1; |
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1
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465 current_input_column += yyleng; |
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466 DO_COMMA_INSERT_CHECK; |
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467 return IMAG_NUM; |
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468 } |
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469 |
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470 {D}+{EXPON}? | |
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471 {D}+\.{D}*{EXPON}? | |
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472 \.{D}+{EXPON}? | |
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473 { |
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474 int nread = sscanf (yytext, "%lf", &(yylval.number)); |
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475 assert (nread == 1); |
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476 quote_is_transpose = 1; |
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477 cant_be_identifier = 1; |
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478 convert_spaces_to_comma = 1; |
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113
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479 if (plotting && ! in_plot_range) |
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480 past_plot_range = 1; |
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1
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481 current_input_column += yyleng; |
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482 DO_COMMA_INSERT_CHECK; |
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483 return NUM; |
|
|
484 } |
|
|
485 |
|
|
486 \[{S}* { |
|
|
487 in_brace_or_paren.push (1); |
|
113
|
488 if (plotting && ! past_plot_range) |
|
1
|
489 { |
|
|
490 in_plot_range = 1; |
|
|
491 RETURN (OPEN_BRACE); |
|
|
492 } |
|
|
493 |
|
|
494 if (do_comma_insert) |
|
|
495 { |
|
|
496 yyless (0); |
|
|
497 do_comma_insert = 0; |
|
|
498 quote_is_transpose = 0; |
|
|
499 cant_be_identifier = 0; |
|
|
500 convert_spaces_to_comma = 1; |
|
|
501 return (','); |
|
|
502 } |
|
|
503 else |
|
|
504 { |
|
|
505 mlnm.push (1); |
|
|
506 braceflag++; |
|
|
507 promptflag--; |
|
|
508 BEGIN NEW_MATRIX; |
|
|
509 RETURN ('['); |
|
|
510 } |
|
|
511 } |
|
|
512 |
|
|
513 {S}* { current_input_column += yyleng; } |
|
|
514 |
|
|
515 {EL}{S}*\n { |
|
|
516 |
|
|
517 // Line continuation. |
|
|
518 |
|
|
519 promptflag--; |
|
|
520 current_input_column = 0; |
|
|
521 } |
|
|
522 |
|
|
523 <<EOF>> RETURN (END_OF_INPUT); |
|
|
524 |
|
|
525 {IDENT}{S}* { |
|
|
526 |
|
|
527 // Truncate the token at the first space or tab but don't write |
|
|
528 // directly on yytext. |
|
|
529 |
|
|
530 static char *tok = (char *) NULL; |
|
|
531 delete [] tok; |
|
|
532 tok = strip_trailing_whitespace (yytext); |
|
|
533 |
|
|
534 int kw_token = is_keyword (tok); |
|
|
535 if (kw_token) |
|
|
536 RETURN (kw_token); |
|
|
537 |
|
|
538 if (plotting && cant_be_identifier) |
|
|
539 { |
|
|
540 int plot_option_kw = is_plot_keyword (tok); |
|
|
541 if (plot_option_kw) |
|
|
542 { |
|
|
543 quote_is_transpose = 0; |
|
|
544 cant_be_identifier = 0; |
|
|
545 convert_spaces_to_comma = 1; |
|
|
546 current_input_column += yyleng; |
|
|
547 return plot_option_kw; |
|
|
548 } |
|
|
549 } |
|
|
550 |
|
113
|
551 if (plotting && ! in_plot_range) |
|
|
552 past_plot_range = 1; |
|
|
553 |
|
1
|
554 if (plotting && in_plot_style) |
|
|
555 { |
|
|
556 char *sty = plot_style_token (&tok[1]); |
|
|
557 if (sty != (char *) NULL) |
|
|
558 { |
|
|
559 yylval.string = strsave (sty); |
|
|
560 if (in_plot_style) |
|
|
561 { |
|
|
562 in_plot_style = 0; |
|
|
563 RETURN (STYLE); |
|
|
564 } |
|
|
565 } |
|
|
566 } |
|
|
567 |
|
|
568 cant_be_identifier = 1; |
|
|
569 |
|
|
570 // If we are looking at a text style function, set up to gobble its |
|
|
571 // arguments. These are also reserved words, but only because it |
|
|
572 // would be very difficult to do anything intelligent with them if |
|
|
573 // they were not reserved. |
|
|
574 |
|
|
575 if (is_text_function_name (tok)) |
|
|
576 { |
|
|
577 BEGIN TEXT_FCN; |
|
|
578 |
|
|
579 if (strcmp (tok, "clear") == 0) |
|
|
580 return CLEAR; |
|
|
581 else if (strcmp (tok, "help") == 0) |
|
|
582 BEGIN HELP_FCN; |
|
|
583 else if (strcmp (tok, "set") == 0) |
|
|
584 doing_set = 1; |
|
|
585 } |
|
|
586 |
|
|
587 yylval.sym_rec = lookup_identifier (tok); |
|
|
588 |
|
|
589 quote_is_transpose = 1; |
|
|
590 current_input_column += yyleng; |
|
|
591 DO_COMMA_INSERT_CHECK; |
|
|
592 |
|
|
593 if (! in_brace_or_paren.empty () |
|
|
594 && in_brace_or_paren.top ()) |
|
|
595 { |
|
|
596 int c0 = yytext[yyleng-1]; |
|
|
597 int spc_prev = (c0 == ' ' || c0 == '\t'); |
|
|
598 int bin_op = next_token_is_bin_op (spc_prev, yytext); |
|
|
599 |
|
|
600 int postfix_un_op |
|
|
601 = next_token_is_postfix_unary_op (spc_prev, yytext); |
|
|
602 |
|
|
603 int c1 = yyinput (); |
|
|
604 unput (c1); |
|
|
605 int other_op = match_any (c1, ",;\n]("); |
|
|
606 |
|
|
607 if (! (postfix_un_op || bin_op || other_op)) |
|
|
608 unput (','); |
|
|
609 } |
|
|
610 |
|
|
611 convert_spaces_to_comma = 1; |
|
|
612 return NAME; |
|
|
613 } |
|
|
614 |
|
|
615 {IDENT}/{S}*= { |
|
|
616 |
|
|
617 // We've found an identifier followed by some space and an equals |
|
|
618 // sign. If we are working on a function definition and the previous |
|
|
619 // token was `function', we have something like this |
|
|
620 // |
|
|
621 // function x = y <list> end |
|
|
622 // |
|
|
623 // which is a function named y returning a variable named x. The |
|
|
624 // symbol y belongs in the global symbol table (nested function |
|
|
625 // definitions are illegal) and the symbol x belongs in the |
|
|
626 // symbol table local to the function. |
|
|
627 // |
|
|
628 // If we're not defining a function, this should function exactly like |
|
|
629 // the case above. I suppose it would be nice to avoid duplicating |
|
|
630 // all the code, eh? |
|
|
631 |
|
|
632 int kw_token = is_keyword (yytext); |
|
|
633 if (kw_token) |
|
|
634 RETURN (kw_token); |
|
|
635 |
|
|
636 if (plotting && cant_be_identifier) |
|
|
637 { |
|
|
638 int plot_option_kw = is_plot_keyword (yytext); |
|
|
639 if (plot_option_kw) |
|
|
640 { |
|
|
641 quote_is_transpose = 0; |
|
|
642 convert_spaces_to_comma = 1; |
|
|
643 current_input_column += yyleng; |
|
|
644 return plot_option_kw; |
|
|
645 } |
|
|
646 } |
|
|
647 |
|
|
648 cant_be_identifier = 1; |
|
|
649 |
|
|
650 // If we are looking at a text style function, set up to gobble its |
|
|
651 // arguments. These are also reserved words, but only because it |
|
|
652 // would be very difficult to do anything intelligent with them if |
|
|
653 // they were not reserved. |
|
|
654 |
|
|
655 if (is_text_function_name (yytext)) |
|
|
656 { |
|
|
657 BEGIN TEXT_FCN; |
|
|
658 |
|
|
659 if (strcmp (yytext, "clear") == 0) |
|
|
660 return CLEAR; |
|
|
661 else if (strcmp (yytext, "help") == 0) |
|
|
662 BEGIN HELP_FCN; |
|
|
663 else if (strcmp (yytext, "set") == 0) |
|
|
664 doing_set = 1; |
|
|
665 } |
|
|
666 |
|
|
667 if (defining_func && maybe_screwed) |
|
|
668 curr_sym_tab = tmp_local_sym_tab; |
|
|
669 |
|
|
670 yylval.sym_rec = lookup_identifier (yytext); |
|
|
671 |
|
|
672 convert_spaces_to_comma = 1; |
|
|
673 current_input_column += yyleng; |
|
|
674 if (defining_func && maybe_screwed) |
|
|
675 { |
|
|
676 return SCREW; |
|
|
677 } |
|
|
678 else |
|
|
679 { |
|
|
680 quote_is_transpose = 1; |
|
|
681 DO_COMMA_INSERT_CHECK; |
|
|
682 return NAME; |
|
|
683 } |
|
|
684 } |
|
|
685 |
|
|
686 "\n" { |
|
|
687 quote_is_transpose = 0; |
|
|
688 cant_be_identifier = 0; |
|
|
689 current_input_column = 0; |
|
|
690 convert_spaces_to_comma = 1; |
|
|
691 return '\n'; |
|
|
692 } |
|
|
693 |
|
|
694 "'" { |
|
|
695 current_input_column++; |
|
|
696 convert_spaces_to_comma = 1; |
|
|
697 |
|
|
698 if (quote_is_transpose) |
|
|
699 { |
|
|
700 DO_COMMA_INSERT_CHECK; |
|
|
701 return QUOTE; |
|
|
702 } |
|
|
703 else |
|
|
704 BEGIN STRING; |
|
|
705 } |
|
|
706 |
|
|
707 ":" { |
|
|
708 if (plotting && (in_plot_range || in_plot_using)) |
|
|
709 RETURN (COLON); |
|
|
710 else |
|
|
711 BIN_OP_RETURN (':'); |
|
|
712 } |
|
|
713 |
|
|
714 \" { BEGIN DQSTRING; } |
|
|
715 ".**" { BIN_OP_RETURN (EPOW); } |
|
|
716 ".*" { BIN_OP_RETURN (EMUL); } |
|
|
717 "./" { BIN_OP_RETURN (EDIV); } |
|
|
718 ".\\" { BIN_OP_RETURN (ELEFTDIV); } |
|
|
719 ".^" { BIN_OP_RETURN (EPOW); } |
|
|
720 ".'" { DO_COMMA_INSERT_CHECK; RETURN (TRANSPOSE); } |
|
|
721 "++" { DO_COMMA_INSERT_CHECK; RETURN (PLUS_PLUS); } |
|
|
722 "--" { DO_COMMA_INSERT_CHECK; RETURN (MINUS_MINUS); } |
|
|
723 "<=" { BIN_OP_RETURN (EXPR_LE); } |
|
|
724 "==" { BIN_OP_RETURN (EXPR_EQ); } |
|
|
725 "~=" { BIN_OP_RETURN (EXPR_NE); } |
|
|
726 "!=" { BIN_OP_RETURN (EXPR_NE); } |
|
|
727 "<>" { BIN_OP_RETURN (EXPR_NE); } |
|
|
728 ">=" { BIN_OP_RETURN (EXPR_GE); } |
|
|
729 "||" { BIN_OP_RETURN (EXPR_OR); } |
|
|
730 "&&" { BIN_OP_RETURN (EXPR_AND); } |
|
|
731 "|" { BIN_OP_RETURN (EXPR_OR); } |
|
|
732 "&" { BIN_OP_RETURN (EXPR_AND); } |
|
113
|
733 "!" { |
|
|
734 if (plotting && ! in_plot_range) |
|
|
735 past_plot_range = 1; |
|
|
736 RETURN (EXPR_NOT); |
|
|
737 } |
|
|
738 "~" { |
|
|
739 if (plotting && ! in_plot_range) |
|
|
740 past_plot_range = 1; |
|
|
741 BIN_OP_RETURN (EXPR_NOT); |
|
|
742 } |
|
1
|
743 "<" { BIN_OP_RETURN (EXPR_LT); } |
|
|
744 ">" { BIN_OP_RETURN (EXPR_GT); } |
|
113
|
745 "+" { |
|
|
746 if (plotting && ! in_plot_range) |
|
|
747 past_plot_range = 1; |
|
|
748 BIN_OP_RETURN ('+'); |
|
|
749 } |
|
|
750 "-" { |
|
|
751 if (plotting && ! in_plot_range) |
|
|
752 past_plot_range = 1; |
|
|
753 BIN_OP_RETURN ('-'); |
|
|
754 } |
|
1
|
755 "**" { BIN_OP_RETURN (POW); } |
|
|
756 "*" { BIN_OP_RETURN ('*'); } |
|
|
757 "/" { BIN_OP_RETURN ('/'); } |
|
|
758 "\\" { BIN_OP_RETURN (LEFTDIV); } |
|
|
759 ";" { RETURN (';'); } |
|
|
760 "," { RETURN (','); } |
|
|
761 "^" { BIN_OP_RETURN (POW); } |
|
|
762 "=" { RETURN ('='); } |
|
|
763 "(" { |
|
113
|
764 if (plotting && ! in_plot_range) |
|
|
765 past_plot_range = 1; |
|
1
|
766 in_brace_or_paren.push (0); |
|
|
767 RETURN ('('); |
|
|
768 } |
|
|
769 ")" { |
|
|
770 if (! in_brace_or_paren.empty ()) |
|
|
771 in_brace_or_paren.pop (); |
|
|
772 DO_COMMA_INSERT_CHECK; |
|
|
773 current_input_column++; |
|
|
774 quote_is_transpose = 1; |
|
|
775 return ')'; |
|
|
776 } |
|
|
777 |
|
|
778 . { |
|
|
779 |
|
|
780 // We return everything else as single character tokens, which should |
|
|
781 // eventually result in a parse error. |
|
|
782 |
|
|
783 RETURN (yytext[0]); |
|
|
784 } |
|
|
785 |
|
|
786 %% |
|
|
787 |
|
|
788 /* |
|
|
789 * GAG. |
|
|
790 * |
|
|
791 * If we're reading a matrix and the next character is '[', make sure |
|
|
792 * that we insert a comma ahead of it. |
|
|
793 */ |
|
|
794 int |
|
|
795 do_comma_insert_check (void) |
|
|
796 { |
|
|
797 int tmp_len = yyleng; |
|
|
798 int c = yyinput (); |
|
|
799 do_comma_insert = (braceflag && c == '['); |
|
|
800 return tmp_len; |
|
|
801 } |
|
|
802 |
|
|
803 /* |
|
|
804 * Fix things up for errors or interrupts. |
|
|
805 */ |
|
|
806 void |
|
|
807 reset_parser (void) |
|
|
808 { |
|
|
809 BEGIN 0; |
|
|
810 promptflag = 1; |
|
|
811 doing_set = 0; |
|
|
812 braceflag = 0; |
|
|
813 maybe_screwed = 0; |
|
|
814 maybe_screwed_again = 0; |
|
|
815 looping = 0; |
|
|
816 iffing = 0; |
|
|
817 ml.clear (); |
|
|
818 mlnm.clear (); |
|
|
819 defining_func = 0; |
|
|
820 curr_sym_tab = top_level_sym_tab; |
|
|
821 get_input_from_eval_string = 0; |
|
|
822 quote_is_transpose = 0; |
|
|
823 current_input_column = 0; |
|
|
824 do_comma_insert = 0; |
|
|
825 plotting = 0; |
|
113
|
826 past_plot_range = 0; |
|
1
|
827 in_plot_range = 0; |
|
|
828 in_plot_using = 0; |
|
|
829 in_plot_style = 0; |
|
|
830 cant_be_identifier = 0; |
|
|
831 convert_spaces_to_comma = 1; |
|
|
832 beginning_of_function = 0; |
|
|
833 in_brace_or_paren.clear (); |
|
|
834 yyrestart (stdin); |
|
|
835 } |
|
|
836 |
|
|
837 static void |
|
|
838 do_string_escapes (char *s) |
|
|
839 { |
|
|
840 char *p1 = s; |
|
|
841 char *p2 = s; |
|
|
842 while (*p2 != '\0') |
|
|
843 { |
|
|
844 if (*p2 == '\\' && *(p2+1) != '\0') |
|
|
845 { |
|
|
846 switch (*++p2) |
|
|
847 { |
|
|
848 case 'a': |
|
|
849 *p1 = '\a'; |
|
|
850 break; |
|
|
851 case 'b': // backspace |
|
|
852 *p1 = '\b'; |
|
|
853 break; |
|
|
854 case 'f': // formfeed |
|
|
855 *p1 = '\f'; |
|
|
856 break; |
|
|
857 case 'n': // newline |
|
|
858 *p1 = '\n'; |
|
|
859 break; |
|
|
860 case 'r': // carriage return |
|
|
861 *p1 = '\r'; |
|
|
862 break; |
|
|
863 case 't': // horizontal tab |
|
|
864 *p1 = '\t'; |
|
|
865 break; |
|
|
866 case 'v': // vertical tab |
|
|
867 *p1 = '\v'; |
|
|
868 break; |
|
|
869 case '\\': // backslash |
|
|
870 *p1 = '\\'; |
|
|
871 break; |
|
|
872 case '\'': // quote |
|
|
873 *p1 = '\''; |
|
|
874 break; |
|
|
875 case '"': // double quote |
|
|
876 *p1 = '"'; |
|
|
877 break; |
|
|
878 default: |
|
|
879 warning ("unrecognized escape sequence `\\%c' -- converting to `%c'", |
|
|
880 *p2, *p2); |
|
|
881 *p1 = *p2; |
|
|
882 break; |
|
|
883 } |
|
|
884 } |
|
|
885 else if (*p2 == '\'' && *(p2+1) == '\'') |
|
|
886 { |
|
|
887 *p1 = '\''; |
|
|
888 p2++; |
|
|
889 } |
|
|
890 else |
|
|
891 { |
|
|
892 *p1 = *p2; |
|
|
893 } |
|
|
894 |
|
|
895 p1++; |
|
|
896 p2++; |
|
|
897 } |
|
|
898 |
|
|
899 *p1 = '\0'; |
|
|
900 } |
|
|
901 |
|
|
902 static void |
|
|
903 fixup_column_count (char *s) |
|
|
904 { |
|
|
905 char c; |
|
|
906 while ((c = *s++) != '\0') |
|
|
907 { |
|
|
908 if (c == '\n') |
|
|
909 current_input_column = 0; |
|
|
910 else |
|
|
911 current_input_column++; |
|
|
912 } |
|
|
913 } |
|
|
914 |
|
|
915 #ifdef yywrap |
|
|
916 #undef yywrap |
|
|
917 #endif |
|
|
918 int |
|
|
919 yywrap (void) |
|
|
920 { |
|
|
921 return 0; |
|
|
922 } |
|
|
923 |
|
|
924 /* |
|
|
925 * Tell us all what the current buffer is. |
|
|
926 */ |
|
|
927 YY_BUFFER_STATE |
|
|
928 current_buffer (void) |
|
|
929 { |
|
|
930 return YY_CURRENT_BUFFER; |
|
|
931 } |
|
|
932 |
|
|
933 /* |
|
|
934 * Create a new buffer. |
|
|
935 */ |
|
|
936 YY_BUFFER_STATE |
|
|
937 create_buffer (FILE *f) |
|
|
938 { |
|
|
939 return yy_create_buffer (f, YY_BUF_SIZE); |
|
|
940 } |
|
|
941 |
|
|
942 /* |
|
|
943 * Start reading a new buffer. |
|
|
944 */ |
|
|
945 void |
|
|
946 switch_to_buffer (YY_BUFFER_STATE buf) |
|
|
947 { |
|
|
948 yy_switch_to_buffer (buf); |
|
|
949 } |
|
|
950 |
|
|
951 /* |
|
|
952 * Delete a buffer. |
|
|
953 */ |
|
|
954 void |
|
|
955 delete_buffer (YY_BUFFER_STATE buf) |
|
|
956 { |
|
|
957 yy_delete_buffer (buf); |
|
|
958 } |
|
|
959 |
|
|
960 /* |
|
|
961 * Restore a buffer (for unwind-prot). |
|
|
962 */ |
|
|
963 void |
|
|
964 restore_input_buffer (void *buf) |
|
|
965 { |
|
|
966 switch_to_buffer ((YY_BUFFER_STATE) buf); |
|
|
967 } |
|
|
968 |
|
|
969 /* |
|
|
970 * Delete a buffer (for unwind-prot). |
|
|
971 */ |
|
|
972 void |
|
|
973 delete_input_buffer (void *buf) |
|
|
974 { |
|
|
975 delete_buffer ((YY_BUFFER_STATE) buf); |
|
|
976 } |
|
|
977 |
|
|
978 static char *plot_styles[] = |
|
|
979 { |
|
|
980 "dots", |
|
|
981 "dots", |
|
|
982 "errorbars", |
|
|
983 "impulses", |
|
|
984 "lines", |
|
|
985 "linespoints", |
|
|
986 "points", |
|
|
987 (char *) NULL, |
|
|
988 }; |
|
|
989 |
|
|
990 static char * |
|
|
991 plot_style_token (char *s) |
|
|
992 { |
|
|
993 char **tmp = plot_styles; |
|
|
994 while (*tmp != (char *) NULL) |
|
|
995 { |
|
|
996 if (almost_match (*tmp, s)) |
|
|
997 return *tmp; |
|
|
998 |
|
|
999 tmp++; |
|
|
1000 } |
|
|
1001 |
|
|
1002 return (char *) NULL; |
|
|
1003 } |
|
|
1004 |
|
|
1005 static int |
|
|
1006 is_plot_keyword (char *s) |
|
|
1007 { |
|
|
1008 if (almost_match ("title", s)) |
|
|
1009 return TITLE; |
|
|
1010 else if (almost_match ("using", s)) |
|
113
|
1011 { in_plot_using = 1; past_plot_range = 1; return USING; } |
|
1
|
1012 else if (almost_match ("with", s)) |
|
113
|
1013 { in_plot_style = 1; past_plot_range = 1; return WITH; } |
|
1
|
1014 else |
|
|
1015 return 0; |
|
|
1016 } |
|
|
1017 |
|
|
1018 /* |
|
|
1019 * Handle keywords. Could probably be more efficient... |
|
|
1020 */ |
|
|
1021 static int |
|
|
1022 is_keyword (char *s) |
|
|
1023 { |
|
|
1024 if (plotting && in_plot_style) |
|
|
1025 { |
|
|
1026 char *sty = plot_style_token (s); |
|
|
1027 if (sty != (char *) NULL) |
|
|
1028 { |
|
|
1029 in_plot_style = 0; |
|
|
1030 yylval.string = strsave (sty); |
|
|
1031 return STYLE; |
|
|
1032 } |
|
|
1033 } |
|
|
1034 |
|
|
1035 int end_found = 0; |
|
|
1036 if (strcmp ("break", s) == 0) |
|
|
1037 return BREAK; |
|
|
1038 else if (strcmp ("continue", s) == 0) |
|
|
1039 return CONTINUE; |
|
|
1040 else if (strcmp ("else", s) == 0) |
|
|
1041 { return ELSE; } |
|
|
1042 else if (strcmp ("elseif", s) == 0) |
|
|
1043 { return ELSEIF; } |
|
|
1044 else if (strcmp ("end", s) == 0) |
|
|
1045 { end_found = 1; yylval.ettype = simple_end; } |
|
|
1046 else if (strcmp ("endfor", s) == 0) |
|
|
1047 { end_found = 1; yylval.ettype = for_end; } |
|
|
1048 else if (strcmp ("endfunction", s) == 0) |
|
|
1049 { end_found = 1; yylval.ettype = function_end; } |
|
|
1050 else if (strcmp ("endif", s) == 0) |
|
|
1051 { end_found = 1; yylval.ettype = if_end; } |
|
|
1052 else if (strcmp ("endwhile", s) == 0) |
|
|
1053 { end_found = 1; yylval.ettype = while_end; } |
|
|
1054 else if (strcmp ("for", s) == 0) |
|
|
1055 { promptflag--; looping++; return FOR; } |
|
|
1056 else if (strcmp ("function", s) == 0) |
|
|
1057 { |
|
|
1058 if (defining_func) |
|
|
1059 { |
|
|
1060 error ("sorry, nested functions are a no-no..."); |
|
|
1061 jump_to_top_level (); |
|
|
1062 } |
|
|
1063 else |
|
|
1064 { |
|
|
1065 tmp_local_sym_tab = new symbol_table (); |
|
|
1066 curr_sym_tab = tmp_local_sym_tab; |
|
|
1067 defining_func = 1; |
|
|
1068 promptflag--; |
|
|
1069 beginning_of_function = 1; |
|
|
1070 help_buf[0] = '\0'; |
|
|
1071 return FCN; |
|
|
1072 } |
|
|
1073 } |
|
|
1074 else if (strcmp ("global", s) == 0) |
|
|
1075 return GLOBAL; |
|
|
1076 else if (strcmp ("gplot", s) == 0) |
|
|
1077 { plotting = 1; yylval.pttype = two_dee; return PLOT; } |
|
|
1078 else if (strcmp ("gsplot", s) == 0) |
|
|
1079 { plotting = 1; yylval.pttype = three_dee; return PLOT; } |
|
|
1080 else if (strcmp ("if", s) == 0) |
|
|
1081 { iffing++; promptflag--; return IF; } |
|
|
1082 else if (strcmp ("return", s) == 0) |
|
|
1083 return FUNC_RET; |
|
|
1084 else if (strcmp ("while", s) == 0) |
|
|
1085 { promptflag--; looping++; return WHILE; } |
|
|
1086 |
|
|
1087 if (end_found) |
|
|
1088 { |
|
|
1089 if (!defining_func && !looping) |
|
|
1090 promptflag++; |
|
|
1091 return END; |
|
|
1092 } |
|
|
1093 |
|
|
1094 return 0; |
|
|
1095 } |
|
|
1096 |
|
|
1097 static symbol_record * |
|
|
1098 lookup_identifier (char *name) |
|
|
1099 { |
|
120
|
1100 symbol_record *lsr = curr_sym_tab->lookup (name, 0, 0); |
|
|
1101 if (lsr != (symbol_record *) NULL) |
|
|
1102 return lsr; |
|
|
1103 |
|
1
|
1104 symbol_record *gsr = global_sym_tab->lookup (name, 0, 0); |
|
|
1105 if (curr_sym_tab == top_level_sym_tab && gsr != (symbol_record *) NULL) |
|
|
1106 return gsr; |
|
|
1107 |
|
|
1108 return curr_sym_tab->lookup (name, 1, 0); |
|
|
1109 } |
|
|
1110 |
|
|
1111 static void |
|
|
1112 grab_help_text (void) |
|
|
1113 { |
|
|
1114 int max_len = HELP_BUF_LENGTH - 1; |
|
|
1115 |
|
|
1116 int in_comment = 1; |
|
|
1117 int len = 0; |
|
|
1118 int c; |
|
|
1119 |
|
|
1120 while ((c = yyinput ()) != EOF) |
|
|
1121 { |
|
|
1122 if (in_comment) |
|
|
1123 { |
|
|
1124 help_buf[len++] = c; |
|
|
1125 if (c == '\n') |
|
|
1126 in_comment = 0; |
|
|
1127 } |
|
|
1128 else |
|
|
1129 { |
|
|
1130 switch (c) |
|
|
1131 { |
|
|
1132 case '%': |
|
|
1133 case '#': |
|
|
1134 in_comment = 1; |
|
|
1135 case ' ': |
|
|
1136 case '\t': |
|
|
1137 break; |
|
|
1138 default: |
|
|
1139 goto done; |
|
|
1140 } |
|
|
1141 } |
|
|
1142 |
|
|
1143 if (len > max_len) |
|
|
1144 { |
|
|
1145 message ("grab_help_text", |
|
|
1146 "buffer overflow after caching %d characters", |
|
|
1147 max_len); |
|
|
1148 |
|
|
1149 goto done; |
|
|
1150 } |
|
|
1151 } |
|
|
1152 |
|
|
1153 done: |
|
|
1154 |
|
|
1155 // Make sure there's an end of line so yylex sees an end to the |
|
|
1156 // comment immediately. |
|
|
1157 |
|
|
1158 yyunput (c, yytext); |
|
|
1159 if (c != '\n') |
|
|
1160 yyunput ('\n', yytext); |
|
|
1161 |
|
|
1162 help_buf[len] = '\0'; |
|
|
1163 } |
|
|
1164 |
|
|
1165 static int |
|
|
1166 match_any (char c, char *s) |
|
|
1167 { |
|
|
1168 char tmp; |
|
|
1169 while ((tmp = *s++) != '\0') |
|
|
1170 { |
|
|
1171 if (c == tmp) |
|
|
1172 return 1; |
|
|
1173 } |
|
|
1174 return 0; |
|
|
1175 } |
|
|
1176 |
|
|
1177 static int |
|
|
1178 looks_like_bin_op (int spc_prev, int spc_next) |
|
|
1179 { |
|
|
1180 return ((spc_prev && spc_next) || ! (spc_prev || spc_next)); |
|
|
1181 } |
|
|
1182 |
|
|
1183 static int |
|
|
1184 next_char_is_space (void) |
|
|
1185 { |
|
|
1186 int c = yyinput (); |
|
|
1187 yyunput (c, yytext); |
|
|
1188 return (c == ' ' || c == '\t'); |
|
|
1189 } |
|
|
1190 |
|
|
1191 static int |
|
|
1192 next_token_is_postfix_unary_op (int spc_prev, char *yytext) |
|
|
1193 { |
|
|
1194 int un_op = 0; |
|
|
1195 |
|
|
1196 int c0 = yyinput (); |
|
|
1197 int c1 = yyinput (); |
|
|
1198 |
|
|
1199 yyunput (c1, yytext); |
|
|
1200 yyunput (c0, yytext); |
|
|
1201 |
|
|
1202 int transpose = (c0 == '.' && c1 == '\''); |
|
|
1203 int hermitian = (c0 == '\''); |
|
|
1204 |
|
|
1205 un_op = (transpose || (hermitian && ! spc_prev)); |
|
|
1206 |
|
|
1207 return un_op; |
|
|
1208 } |
|
|
1209 |
|
|
1210 static int |
|
|
1211 next_token_is_bin_op (int spc_prev, char *yytext) |
|
|
1212 { |
|
|
1213 int bin_op = 0; |
|
|
1214 int spc_next = 0; |
|
|
1215 |
|
|
1216 int c0 = yyinput (); |
|
|
1217 int c1 = yyinput (); |
|
|
1218 |
|
|
1219 switch (c0) |
|
|
1220 { |
|
|
1221 case '+': case '-': case '/': |
|
|
1222 case ':': case '\\': case '^': |
|
|
1223 spc_next = (c1 == ' ' || c1 == '\t'); |
|
|
1224 break; |
|
|
1225 |
|
|
1226 case '&': |
|
|
1227 if (c1 == '&') |
|
|
1228 spc_next = next_char_is_space (); |
|
|
1229 else |
|
|
1230 spc_next = (c1 == ' ' || c1 == '\t'); |
|
|
1231 break; |
|
|
1232 |
|
|
1233 case '*': |
|
|
1234 if (c1 == '*') |
|
|
1235 spc_next = next_char_is_space (); |
|
|
1236 else |
|
|
1237 spc_next = (c1 == ' ' || c1 == '\t'); |
|
|
1238 break; |
|
|
1239 |
|
|
1240 case '|': |
|
|
1241 if (c1 == '|') |
|
|
1242 spc_next = next_char_is_space (); |
|
|
1243 else |
|
|
1244 spc_next = (c1 == ' ' || c1 == '\t'); |
|
|
1245 break; |
|
|
1246 |
|
|
1247 case '<': |
|
|
1248 if (c1 == '=' || c1 == '>') |
|
|
1249 spc_next = next_char_is_space (); |
|
|
1250 else |
|
|
1251 spc_next = (c1 == ' ' || c1 == '\t'); |
|
|
1252 break; |
|
|
1253 |
|
|
1254 case '>': |
|
|
1255 if (c1 == '=') |
|
|
1256 spc_next = next_char_is_space (); |
|
|
1257 else |
|
|
1258 spc_next = (c1 == ' ' || c1 == '\t'); |
|
|
1259 break; |
|
|
1260 |
|
|
1261 case '~': case '!': case '=': |
|
|
1262 if (c1 == '=') |
|
|
1263 spc_next = next_char_is_space (); |
|
|
1264 else |
|
|
1265 goto done; |
|
|
1266 break; |
|
|
1267 |
|
|
1268 case '.': |
|
|
1269 if (c1 == '*') |
|
|
1270 { |
|
|
1271 int c2 = yyinput (); |
|
|
1272 if (c2 == '*') |
|
|
1273 spc_next = next_char_is_space (); |
|
|
1274 else |
|
|
1275 spc_next = (c2 == ' ' || c2 == '\t'); |
|
|
1276 yyunput (c2, yytext); |
|
|
1277 } |
|
|
1278 else if (c1 == '/' || c1 == '\\' || c1 == '^') |
|
|
1279 spc_next = next_char_is_space (); |
|
|
1280 else |
|
|
1281 goto done; |
|
|
1282 break; |
|
|
1283 |
|
|
1284 default: |
|
|
1285 goto done; |
|
|
1286 } |
|
|
1287 |
|
|
1288 bin_op = looks_like_bin_op (spc_prev, spc_next); |
|
|
1289 |
|
|
1290 done: |
|
|
1291 yyunput (c1, yytext); |
|
|
1292 yyunput (c0, yytext); |
|
|
1293 |
|
|
1294 return bin_op; |
|
|
1295 } |
|
|
1296 |
|
|
1297 char * |
|
|
1298 strip_trailing_whitespace (char *s) |
|
|
1299 { |
|
|
1300 char *retval = strsave (s); |
|
|
1301 |
|
|
1302 char *t = strchr (retval, ' '); |
|
|
1303 if (t != (char *) NULL) |
|
|
1304 *t = '\0'; |
|
|
1305 |
|
|
1306 t = strchr (retval, '\t'); |
|
|
1307 if (t != (char *) NULL) |
|
|
1308 *t = '\0'; |
|
|
1309 |
|
|
1310 return retval; |
|
|
1311 } |
|
|
1312 |
|
|
1313 void |
|
|
1314 check_for_garbage_after_fcn_def (void) |
|
|
1315 { |
|
|
1316 // By making a newline be the next character to be read, we will force |
|
|
1317 // the parser to return after reading the function. Calling yyunput |
|
|
1318 // with EOF seems not to work... |
|
|
1319 |
|
|
1320 int in_comment = 0; |
|
|
1321 int lineno = input_line_number; |
|
|
1322 int c; |
|
|
1323 while ((c = yyinput ()) != EOF) |
|
|
1324 { |
|
|
1325 switch (c) |
|
|
1326 { |
|
|
1327 case ' ': |
|
|
1328 case '\t': |
|
|
1329 case ';': |
|
|
1330 case ',': |
|
|
1331 break; |
|
|
1332 case '\n': |
|
|
1333 if (in_comment) |
|
|
1334 in_comment = 0; |
|
|
1335 break; |
|
|
1336 case '%': |
|
|
1337 case '#': |
|
|
1338 in_comment = 1; |
|
|
1339 break; |
|
|
1340 default: |
|
|
1341 if (in_comment) |
|
|
1342 break; |
|
|
1343 else |
|
|
1344 { |
|
|
1345 warning ("ignoring trailing garbage after end of function\n\ |
|
|
1346 near line %d of file `%s.m'", lineno, curr_m_file_name); |
|
|
1347 |
|
|
1348 yyunput ('\n', yytext); |
|
|
1349 return; |
|
|
1350 } |
|
|
1351 } |
|
|
1352 } |
|
|
1353 yyunput ('\n', yytext); |
|
|
1354 } |
|
|
1355 |
|
|
1356 /* Maybe someday... |
|
|
1357 |
|
|
1358 "+=" return ADD_EQ; |
|
|
1359 "-=" return SUB_EQ; |
|
|
1360 "*=" return MUL_EQ; |
|
|
1361 "/=" return DIV_EQ; |
|
|
1362 "\\=" return LEFTDIV_EQ; |
|
|
1363 ".+=" return ADD_EQ; |
|
|
1364 ".-=" return SUB_EQ; |
|
|
1365 ".*=" return EMUL_EQ; |
|
|
1366 "./=" return EDIV_EQ; |
|
|
1367 ".\\=" return ELEFTDIV_EQ; |
|
|
1368 |
|
|
1369 */ |
