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style fixes for tex lexer and parser * oct-tex-lexer.in.ll, oct-tex-parser.in.yy: Eliminate tabs and reindent.
author John W. Eaton <jwe@octave.org>
date Fri, 02 Oct 2015 12:25:39 -0400
parents a941a65c7cb8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 %{
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24
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25 #define YYDEBUG 1
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26
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27 #ifdef HAVE_CONFIG_H
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28 #include <config.h>
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29 #endif
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30
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31 #include "txt-eng.h"
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32 #include "oct-tex-parser.h"
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33
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34 extern int octave_tex_lex (YYSTYPE *, void *);
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35 static void yyerror (text_parser_tex& parser, const char *s);
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36
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37 #if defined (GNULIB_NAMESPACE)
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38 // Calls to the following functions appear in the generated output
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39 // from Bison without the namespace tag. Redefine them so we will use
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40 // them via the gnulib namespace.
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41 #define fclose GNULIB_NAMESPACE::fclose
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42 #define fprintf GNULIB_NAMESPACE::fprintf
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43 #define malloc GNULIB_NAMESPACE::malloc
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44 #endif
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45
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46 #define scanner parser.get_scanner ()
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47
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48 %}
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49
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50 %API_PREFIX_DECL%
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51
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52 %define api.pure
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53 %parse-param { text_parser_tex& parser }
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54 %lex-param { void *scanner }
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55
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56 %code requires {#include <string>}
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57
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58 %union
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59 {
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60 // Leaf symbols produced by the scanner.
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61 char ch;
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62 double num;
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63 int sym;
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64
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65 // Used for string buffering.
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66 std::string* str;
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67
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68 // Objects produced by the parser.
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69 text_element* e_base;
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70 text_element_list* e_list;
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71 }
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72
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73 %token BF IT SL RM
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74 %token FONTNAME FONTSIZE
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75 %token COLOR COLOR_RGB
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76 %token START END SUPER SUB
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77 %token<ch> CH
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78 %token<num> NUM
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79 %token<sym> SYM
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80
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81 %type<str> simple_string
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82 %type<e_base> string_element symbol_element
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83 %type<e_base> superscript_element subscript_element combined_script_element
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84 %type<e_base> font_modifier_element fontname_element fontsize_element
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85 %type<e_base> color_element
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86 %type<e_list> string_element_list scoped_string_element_list
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87
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88 // Make sure there's no memory leak on parse error.
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89 %destructor { } <ch> <num> <sym>
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90 %destructor { delete $$; } <*>
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91
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92 %nonassoc SCRIPT
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93 %nonassoc SUB SUPER
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94
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95 %nonassoc STR
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96 %nonassoc CH
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97
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98 %start string
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99
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100 %%
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101
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102 simple_string : CH
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103 { $$ = new std::string (1, $1); }
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104 | simple_string CH
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105 { $1->append (1, $2); $$ = $1; }
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106 ;
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107
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108 symbol_element : SYM
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109 { $$ = new text_element_symbol ($1); }
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110 ;
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111
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112 font_modifier_element : BF
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113 { $$ = new text_element_fontstyle (text_element_fontstyle::bold); }
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114 | IT
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115 { $$ = new text_element_fontstyle (text_element_fontstyle::italic); }
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116 | SL
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117 { $$ = new text_element_fontstyle (text_element_fontstyle::oblique); }
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118 | RM
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119 { $$ = new text_element_fontstyle (text_element_fontstyle::normal); }
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120 ;
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121
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122 fontsize_element : FONTSIZE START NUM END
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123 { $$ = new text_element_fontsize ($3); }
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124 ;
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125
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126 fontname_element : FONTNAME START simple_string END
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127 {
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128 $$ = new text_element_fontname (*$3);
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129 delete $3;
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130 }
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131 ;
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132
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133 color_element : COLOR START simple_string END
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134 {
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135 $$ = new text_element_color (*$3);
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136 delete $3;
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137 }
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138 | COLOR_RGB START NUM NUM NUM END
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139 {
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140 $$ = new text_element_color ($3, $4, $5);
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141 }
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142 ;
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143
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144 string_element : simple_string %prec STR
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145 {
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146 $$ = new text_element_string (*$1);
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147 delete $1;
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148 }
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149 | scoped_string_element_list
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150 { $$ = $1; }
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151 | symbol_element
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152 | font_modifier_element
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153 | fontsize_element
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154 | fontname_element
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155 | color_element
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156 | superscript_element %prec SCRIPT
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157 | subscript_element %prec SCRIPT
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158 | combined_script_element
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159 ;
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160
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161 superscript_element : SUPER CH
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162 { $$ = new text_element_superscript ($2); }
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163 | SUPER scoped_string_element_list
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164 { $$ = new text_element_superscript ($2); }
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165 | SUPER symbol_element
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166 { $$ = new text_element_superscript ($2); }
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167 ;
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168
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169 subscript_element : SUB CH
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170 { $$ = new text_element_subscript ($2); }
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171 | SUB scoped_string_element_list
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172 { $$ = new text_element_subscript ($2); }
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173 | SUB symbol_element
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174 { $$ = new text_element_subscript ($2); }
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175 ;
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176
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177 combined_script_element : subscript_element superscript_element
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178 { $$ = new text_element_combined ($1, $2); }
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179 | superscript_element subscript_element
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180 { $$ = new text_element_combined ($1, $2); }
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181 ;
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182
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183 string_element_list : string_element
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184 { $$ = new text_element_list ($1); }
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185 | string_element_list string_element
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186 { $1->push_back ($2); $$ = $1; }
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187 ;
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188
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189 scoped_string_element_list : START string_element_list END
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190 { $$ = $2; }
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191 | START END
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192 { $$ = new text_element_list (); }
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193 ;
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194
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195 string : // empty
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196 { parser.set_parse_result (new text_element_string ("")); }
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197 | string_element_list
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198 { parser.set_parse_result ($1); }
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199 ;
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200
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201 %%
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202
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203 text_element*
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204 text_parser_tex::parse (const std::string& s)
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205 {
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206 octave_tex_debug = 0;
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207
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208 if (init_lexer (s))
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209 {
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210 result = 0;
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211
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212 if (octave_tex_parse (*this) == 0)
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213 return result;
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214 }
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215
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216 return new text_element_string (s);
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217 }
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218
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219 static void
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220 yyerror (text_parser_tex&, const char *s)
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221 {
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222 fprintf (stderr, "TeX parse error: %s\n", s);
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223 }