Mercurial > octave-nkf
annotate libinterp/corefcn/oct-tex-lexer.in.ll @ 20607:db3286201347 stable
doc: Add explanation of ':' optional input to numel().
* data.cc (Fnumel): Add explanation of ':' optional input.
author | Rik <rik@octave.org> |
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date | Wed, 07 Oct 2015 14:52:01 -0700 |
parents | a3577622952c |
children | e3c0fee87493 |
rev | line source |
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1 /* |
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2 |
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3 Copyright (C) 2013-2015 Michael Goffioul |
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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 3 of the License, or (at your |
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10 option) any later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, see |
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19 <http://www.gnu.org/licenses/>. |
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20 |
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21 */ |
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22 |
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23 %option prefix = "octave_tex_" |
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24 %option noyywrap |
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25 %option reentrant |
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26 %option bison-bridge |
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27 |
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28 %option noyyalloc |
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29 %option noyyrealloc |
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30 %option noyyfree |
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31 |
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32 %top { |
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33 #ifdef HAVE_CONFIG_H |
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34 #include <config.h> |
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35 #endif |
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36 |
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37 } |
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38 |
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39 %x NUM_MODE |
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40 %x MAYBE_NUM_MODE |
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41 |
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42 %{ |
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43 |
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44 // The generated code may include unistd.h. We need that to happen |
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45 // before defining isatty to be prefixed with the gnulib namespace |
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46 // identifier. |
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47 |
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48 #include <sys/types.h> |
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49 #include <unistd.h> |
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50 |
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51 #include "txt-eng.h" |
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52 #include "oct-tex-parser.h" |
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53 |
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54 // FIXME: with bison 3.x, OCTAVE_TEX_STYPE appears in the generated |
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55 // oct-parse.h file, but there is no definition for YYSTYPE, which is |
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56 // needed by the code that is generated by flex. I can't seem to find a |
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57 // way to tell flex to use OCTAVE_TEX_STYPE instead of YYSTYPE in the code |
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58 // it generates, or to tell bison to provide the definition of YYSTYPE |
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59 // in the generated oct-parse.h file. |
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60 |
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61 #if defined (OCTAVE_TEX_STYPE_IS_DECLARED) && ! defined YYSTYPE |
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62 #define YYSTYPE OCTAVE_TEX_STYPE |
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63 #endif |
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64 |
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65 #if defined (GNULIB_NAMESPACE) |
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66 // Calls to the following functions appear in the generated output from |
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67 // flex without the namespace tag. Redefine them so we will use them |
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68 // via the gnulib namespace. |
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69 #define fprintf GNULIB_NAMESPACE::fprintf |
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70 #define fread GNULIB_NAMESPACE::fread |
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71 #define fwrite GNULIB_NAMESPACE::fwrite |
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72 #define getc GNULIB_NAMESPACE::getc |
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73 #define isatty GNULIB_NAMESPACE::isatty |
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74 #define malloc GNULIB_NAMESPACE::malloc |
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75 #define realloc GNULIB_NAMESPACE::realloc |
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76 #endif |
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77 |
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78 %} |
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79 |
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80 D [0-9] |
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81 NUM (({D}+\.?{D}*)|(\.{D}+)) |
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82 |
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83 %% |
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84 |
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85 %{ |
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86 // Numeric values |
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87 %} |
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88 |
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89 <NUM_MODE>{NUM} { |
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90 int nread; |
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91 |
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92 nread = sscanf (yytext, "%lf", &(yylval->num)); |
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93 if (nread == 1) |
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94 return NUM; |
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95 } |
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96 <NUM_MODE>[ \t]+ { } |
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97 <NUM_MODE>"\n"|. { yyless (0); BEGIN (INITIAL); } |
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98 |
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99 <MAYBE_NUM_MODE>"{" { BEGIN (NUM_MODE); return START; } |
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100 <MAYBE_NUM_MODE>"\n"|. { yyless (0); BEGIN (INITIAL); } |
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101 |
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102 %{ |
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103 // Simple commands |
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104 %} |
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105 |
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106 "\\bf" { return BF; } |
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107 "\\it" { return IT; } |
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108 "\\sl" { return SL; } |
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109 "\\rm" { return RM; } |
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110 |
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111 %{ |
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112 // Generic font commands |
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113 %} |
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114 |
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115 "\\fontname" { return FONTNAME; } |
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116 "\\fontsize" { BEGIN (MAYBE_NUM_MODE); return FONTSIZE; } |
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117 "\\color[rgb]" { BEGIN (MAYBE_NUM_MODE); return COLOR_RGB; } |
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118 "\\color" { return COLOR; } |
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119 |
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120 %{ |
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121 // Special characters |
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122 %} |
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123 |
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124 "{" { return START; } |
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125 "}" { return END; } |
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126 "^" { return SUPER; } |
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127 "_" { return SUB; } |
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128 |
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129 "\\{" | |
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130 "\\}" | |
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131 "\\^" | |
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132 "\\_" | |
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133 "\\\\" { yylval->ch = yytext[1]; return CH; } |
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134 |
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135 %{ |
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136 // Symbols |
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137 %} |
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138 |
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139 @SYMBOL_RULES@ |
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140 |
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141 %{ |
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142 // Generic character |
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143 %} |
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144 |
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145 "\n" | |
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146 . { yylval->ch = yytext[0]; return CH; } |
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147 |
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148 %% |
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149 |
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150 void * |
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151 octave_tex_alloc (yy_size_t size, yyscan_t) |
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152 { |
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153 return malloc (size); |
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154 } |
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155 |
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156 void * |
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157 octave_tex_realloc (void *ptr, yy_size_t size, yyscan_t) |
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158 { |
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159 return realloc (ptr, size); |
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160 } |
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161 |
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162 void |
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163 octave_tex_free (void *ptr, yyscan_t) |
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164 { |
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165 free (ptr); |
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166 } |
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167 |
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168 bool |
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169 text_parser_tex::init_lexer (const std::string& s) |
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170 { |
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171 if (! scanner) |
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172 octave_tex_lex_init (&scanner); |
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173 |
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174 if (scanner) |
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175 { |
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176 if (buffer_state) |
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177 { |
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178 octave_tex__delete_buffer (reinterpret_cast<YY_BUFFER_STATE> (buffer_state), |
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179 scanner); |
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180 buffer_state = 0; |
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181 } |
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182 |
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183 buffer_state = octave_tex__scan_bytes (s.data (), s.length (), scanner); |
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184 } |
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185 |
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186 return (scanner && buffer_state); |
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187 } |
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188 |
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189 void |
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190 text_parser_tex::destroy_lexer (void) |
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191 { |
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192 if (buffer_state) |
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193 { |
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194 octave_tex__delete_buffer (reinterpret_cast<YY_BUFFER_STATE> (buffer_state), |
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195 scanner); |
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196 buffer_state = 0; |
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197 } |
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198 |
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199 if (scanner) |
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200 { |
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201 octave_tex_lex_destroy (scanner); |
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202 scanner = 0; |
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203 } |
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204 } |