1 #################################################################### |
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2 # |
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3 # This file was generated using Parse::Yapp version 1.05. |
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4 # |
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5 # Don't edit this file, use source file instead. |
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6 # |
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7 # ANY CHANGE MADE HERE WILL BE LOST ! |
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8 # |
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9 #################################################################### |
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10 package Parse::Yapp::Parse; |
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11 use vars qw ( @ISA ); |
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12 use strict; |
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13 |
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14 @ISA= qw ( Parse::Yapp::Driver ); |
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15 use Parse::Yapp::Driver; |
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16 |
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17 #line 1 "YappParse.yp" |
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18 # (c) Copyright Francois Desarmenien 1998-2001, all rights reserved. |
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19 # (see COPYRIGHT in Parse::Yapp.pm pod section for use and distribution rights) |
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20 # |
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21 # Parse/Yapp/Parser.yp: Parse::Yapp::Parser.pm source file |
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22 # |
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23 # Use: yapp -m 'Parse::Yapp::Parse' -o Parse/Yapp/Parse.pm YappParse.yp |
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24 # |
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25 # to generate the Parser module. |
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26 # |
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27 #line 12 "YappParse.yp" |
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28 |
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29 require 5.004; |
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30 |
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31 use Carp; |
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32 |
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33 my($input,$lexlevel,@lineno,$nberr,$prec,$labelno); |
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34 my($syms,$head,$tail,$token,$term,$nterm,$rules,$precterm,$start,$nullable); |
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35 my($expect); |
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36 |
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37 |
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38 |
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39 sub new { |
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40 my($class)=shift; |
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41 ref($class) |
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42 and $class=ref($class); |
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43 |
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44 my($self)=$class->SUPER::new( yyversion => '1.05', |
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45 yystates => |
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46 [ |
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47 {#State 0 |
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48 ACTIONS => { |
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49 "%%" => -6, |
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50 'HEADCODE' => 3, |
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51 'UNION' => 2, |
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52 'TOKEN' => 5, |
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53 'ASSOC' => 7, |
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54 'START' => 6, |
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55 'error' => 9, |
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56 'TYPE' => 10, |
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57 "\n" => 11, |
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58 'EXPECT' => 13 |
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59 }, |
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60 GOTOS => { |
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61 'head' => 1, |
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62 'decls' => 12, |
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63 'yapp' => 4, |
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64 'decl' => 14, |
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65 'headsec' => 8 |
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66 } |
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67 }, |
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68 {#State 1 |
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69 ACTIONS => { |
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70 'error' => 19, |
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71 "%%" => 16, |
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72 'IDENT' => 18 |
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73 }, |
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74 GOTOS => { |
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75 'rules' => 15, |
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76 'rulesec' => 20, |
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77 'body' => 17 |
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78 } |
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79 }, |
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80 {#State 2 |
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81 ACTIONS => { |
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82 'CODE' => 21 |
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83 } |
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84 }, |
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85 {#State 3 |
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86 ACTIONS => { |
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87 "\n" => 22 |
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88 } |
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89 }, |
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90 {#State 4 |
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91 ACTIONS => { |
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92 '' => 23 |
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93 } |
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94 }, |
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95 {#State 5 |
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96 ACTIONS => { |
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97 "<" => 25 |
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98 }, |
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99 DEFAULT => -19, |
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100 GOTOS => { |
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101 'typedecl' => 24 |
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102 } |
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103 }, |
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104 {#State 6 |
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105 ACTIONS => { |
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106 'IDENT' => 26 |
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107 }, |
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108 GOTOS => { |
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109 'ident' => 27 |
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110 } |
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111 }, |
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112 {#State 7 |
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113 ACTIONS => { |
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114 "<" => 25 |
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115 }, |
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116 DEFAULT => -19, |
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117 GOTOS => { |
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118 'typedecl' => 28 |
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119 } |
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120 }, |
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121 {#State 8 |
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122 ACTIONS => { |
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123 "%%" => 29 |
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124 } |
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125 }, |
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126 {#State 9 |
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127 ACTIONS => { |
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128 "\n" => 30 |
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129 } |
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130 }, |
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131 {#State 10 |
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132 ACTIONS => { |
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133 "<" => 25 |
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134 }, |
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135 DEFAULT => -19, |
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136 GOTOS => { |
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137 'typedecl' => 31 |
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138 } |
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139 }, |
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140 {#State 11 |
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141 DEFAULT => -10 |
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142 }, |
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143 {#State 12 |
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144 ACTIONS => { |
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145 "%%" => -7, |
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146 'HEADCODE' => 3, |
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147 'UNION' => 2, |
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148 'TOKEN' => 5, |
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149 'ASSOC' => 7, |
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150 'START' => 6, |
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151 'error' => 9, |
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152 'TYPE' => 10, |
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153 "\n" => 11, |
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154 'EXPECT' => 13 |
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155 }, |
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156 GOTOS => { |
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157 'decl' => 32 |
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158 } |
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159 }, |
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160 {#State 13 |
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161 ACTIONS => { |
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162 'NUMBER' => 33 |
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163 } |
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164 }, |
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165 {#State 14 |
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166 DEFAULT => -9 |
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167 }, |
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168 {#State 15 |
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169 DEFAULT => -28 |
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170 }, |
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171 {#State 16 |
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172 DEFAULT => -26 |
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173 }, |
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174 {#State 17 |
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175 ACTIONS => { |
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176 'TAILCODE' => 34 |
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177 }, |
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178 DEFAULT => -45, |
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179 GOTOS => { |
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180 'tail' => 35 |
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181 } |
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182 }, |
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183 {#State 18 |
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184 ACTIONS => { |
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185 ":" => 36 |
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186 } |
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187 }, |
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188 {#State 19 |
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189 ACTIONS => { |
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190 ";" => 37 |
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191 } |
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192 }, |
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193 {#State 20 |
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194 ACTIONS => { |
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195 'error' => 19, |
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196 "%%" => 39, |
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197 'IDENT' => 18 |
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198 }, |
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199 GOTOS => { |
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200 'rules' => 38 |
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201 } |
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202 }, |
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203 {#State 21 |
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204 ACTIONS => { |
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205 "\n" => 40 |
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206 } |
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207 }, |
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208 {#State 22 |
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209 DEFAULT => -14 |
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210 }, |
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211 {#State 23 |
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212 DEFAULT => -0 |
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213 }, |
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214 {#State 24 |
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215 ACTIONS => { |
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216 'LITERAL' => 41, |
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217 'IDENT' => 26 |
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218 }, |
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219 GOTOS => { |
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220 'symlist' => 43, |
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221 'ident' => 44, |
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222 'symbol' => 42 |
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223 } |
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224 }, |
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225 {#State 25 |
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226 ACTIONS => { |
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227 'IDENT' => 45 |
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228 } |
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229 }, |
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230 {#State 26 |
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231 DEFAULT => -4 |
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232 }, |
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233 {#State 27 |
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234 ACTIONS => { |
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235 "\n" => 46 |
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236 } |
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237 }, |
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238 {#State 28 |
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239 ACTIONS => { |
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240 'LITERAL' => 41, |
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241 'IDENT' => 26 |
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242 }, |
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243 GOTOS => { |
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244 'symlist' => 47, |
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245 'ident' => 44, |
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246 'symbol' => 42 |
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247 } |
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248 }, |
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249 {#State 29 |
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250 DEFAULT => -5 |
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251 }, |
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252 {#State 30 |
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253 DEFAULT => -18 |
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254 }, |
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255 {#State 31 |
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256 ACTIONS => { |
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257 'IDENT' => 26 |
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258 }, |
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259 GOTOS => { |
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260 'ident' => 48, |
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261 'identlist' => 49 |
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262 } |
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263 }, |
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264 {#State 32 |
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265 DEFAULT => -8 |
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266 }, |
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267 {#State 33 |
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268 ACTIONS => { |
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269 "\n" => 50 |
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270 } |
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271 }, |
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272 {#State 34 |
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273 DEFAULT => -46 |
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274 }, |
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275 {#State 35 |
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276 DEFAULT => -1 |
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277 }, |
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278 {#State 36 |
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279 ACTIONS => { |
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280 'CODE' => 57, |
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281 'LITERAL' => 41, |
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282 'IDENT' => 26 |
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283 }, |
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284 DEFAULT => -35, |
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285 GOTOS => { |
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286 'rhselts' => 56, |
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287 'rule' => 51, |
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288 'code' => 52, |
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289 'rhs' => 53, |
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290 'ident' => 44, |
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291 'rhselt' => 58, |
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292 'rhss' => 55, |
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293 'symbol' => 54 |
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294 } |
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295 }, |
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296 {#State 37 |
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297 DEFAULT => -30 |
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298 }, |
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299 {#State 38 |
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300 DEFAULT => -27 |
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301 }, |
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302 {#State 39 |
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303 DEFAULT => -25 |
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304 }, |
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305 {#State 40 |
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306 DEFAULT => -15 |
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307 }, |
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308 {#State 41 |
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309 DEFAULT => -2 |
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310 }, |
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311 {#State 42 |
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312 DEFAULT => -22 |
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313 }, |
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314 {#State 43 |
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315 ACTIONS => { |
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316 "\n" => 60, |
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317 'LITERAL' => 41, |
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318 'IDENT' => 26 |
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319 }, |
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320 GOTOS => { |
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321 'ident' => 44, |
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322 'symbol' => 59 |
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323 } |
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324 }, |
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325 {#State 44 |
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326 DEFAULT => -3 |
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327 }, |
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328 {#State 45 |
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329 ACTIONS => { |
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330 ">" => 61 |
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331 } |
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332 }, |
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333 {#State 46 |
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334 DEFAULT => -13 |
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335 }, |
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336 {#State 47 |
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337 ACTIONS => { |
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338 "\n" => 62, |
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339 'LITERAL' => 41, |
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340 'IDENT' => 26 |
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341 }, |
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342 GOTOS => { |
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343 'ident' => 44, |
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344 'symbol' => 59 |
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345 } |
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346 }, |
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347 {#State 48 |
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348 DEFAULT => -24 |
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349 }, |
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350 {#State 49 |
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351 ACTIONS => { |
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352 "\n" => 63, |
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353 'IDENT' => 26 |
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354 }, |
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355 GOTOS => { |
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356 'ident' => 64 |
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357 } |
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358 }, |
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359 {#State 50 |
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360 DEFAULT => -17 |
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361 }, |
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362 {#State 51 |
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363 DEFAULT => -32 |
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364 }, |
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365 {#State 52 |
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366 DEFAULT => -40 |
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367 }, |
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368 {#State 53 |
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369 ACTIONS => { |
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370 'PREC' => 66 |
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371 }, |
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372 DEFAULT => -34, |
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373 GOTOS => { |
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374 'prec' => 65 |
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375 } |
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376 }, |
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377 {#State 54 |
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378 DEFAULT => -39 |
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379 }, |
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380 {#State 55 |
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381 ACTIONS => { |
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382 "|" => 68, |
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383 ";" => 67 |
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384 } |
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385 }, |
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386 {#State 56 |
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387 ACTIONS => { |
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388 'CODE' => 57, |
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389 'LITERAL' => 41, |
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390 'IDENT' => 26 |
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391 }, |
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392 DEFAULT => -36, |
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393 GOTOS => { |
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394 'code' => 52, |
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395 'ident' => 44, |
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396 'rhselt' => 69, |
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397 'symbol' => 54 |
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398 } |
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399 }, |
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400 {#State 57 |
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401 DEFAULT => -44 |
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402 }, |
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403 {#State 58 |
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404 DEFAULT => -38 |
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405 }, |
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406 {#State 59 |
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407 DEFAULT => -21 |
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408 }, |
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409 {#State 60 |
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410 DEFAULT => -11 |
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411 }, |
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412 {#State 61 |
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413 DEFAULT => -20 |
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414 }, |
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415 {#State 62 |
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416 DEFAULT => -12 |
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417 }, |
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418 {#State 63 |
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419 DEFAULT => -16 |
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420 }, |
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421 {#State 64 |
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422 DEFAULT => -23 |
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423 }, |
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424 {#State 65 |
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425 ACTIONS => { |
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426 'CODE' => 57 |
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427 }, |
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428 DEFAULT => -42, |
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429 GOTOS => { |
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430 'code' => 70, |
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431 'epscode' => 71 |
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432 } |
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433 }, |
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434 {#State 66 |
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435 ACTIONS => { |
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436 'LITERAL' => 41, |
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437 'IDENT' => 26 |
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438 }, |
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439 GOTOS => { |
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440 'ident' => 44, |
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441 'symbol' => 72 |
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442 } |
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443 }, |
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444 {#State 67 |
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445 DEFAULT => -29 |
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446 }, |
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447 {#State 68 |
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448 ACTIONS => { |
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449 'CODE' => 57, |
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450 'LITERAL' => 41, |
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451 'IDENT' => 26 |
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452 }, |
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453 DEFAULT => -35, |
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454 GOTOS => { |
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455 'rhselts' => 56, |
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456 'rule' => 73, |
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457 'code' => 52, |
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458 'rhs' => 53, |
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459 'ident' => 44, |
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460 'rhselt' => 58, |
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461 'symbol' => 54 |
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462 } |
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463 }, |
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464 {#State 69 |
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465 DEFAULT => -37 |
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466 }, |
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467 {#State 70 |
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468 DEFAULT => -43 |
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469 }, |
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470 {#State 71 |
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471 DEFAULT => -33 |
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472 }, |
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473 {#State 72 |
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474 DEFAULT => -41 |
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475 }, |
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476 {#State 73 |
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477 DEFAULT => -31 |
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478 } |
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479 ], |
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480 yyrules => |
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481 [ |
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482 [#Rule 0 |
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483 '$start', 2, undef |
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484 ], |
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485 [#Rule 1 |
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486 'yapp', 3, undef |
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487 ], |
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488 [#Rule 2 |
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489 'symbol', 1, |
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490 sub |
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491 #line 30 "YappParse.yp" |
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492 { |
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493 exists($$syms{$_[1][0]}) |
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494 or do { |
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495 $$syms{$_[1][0]} = $_[1][1]; |
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496 $$term{$_[1][0]} = undef; |
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497 }; |
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498 $_[1] |
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499 } |
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500 ], |
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501 [#Rule 3 |
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502 'symbol', 1, undef |
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503 ], |
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504 [#Rule 4 |
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505 'ident', 1, |
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506 sub |
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507 #line 41 "YappParse.yp" |
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508 { |
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509 exists($$syms{$_[1][0]}) |
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510 or do { |
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511 $$syms{$_[1][0]} = $_[1][1]; |
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512 $$term{$_[1][0]} = undef; |
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513 }; |
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514 $_[1] |
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515 } |
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516 ], |
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517 [#Rule 5 |
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518 'head', 2, undef |
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519 ], |
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520 [#Rule 6 |
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521 'headsec', 0, undef |
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522 ], |
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523 [#Rule 7 |
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524 'headsec', 1, undef |
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525 ], |
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526 [#Rule 8 |
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527 'decls', 2, undef |
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528 ], |
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529 [#Rule 9 |
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530 'decls', 1, undef |
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531 ], |
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532 [#Rule 10 |
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533 'decl', 1, undef |
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534 ], |
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535 [#Rule 11 |
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536 'decl', 4, |
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537 sub |
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538 #line 66 "YappParse.yp" |
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539 { |
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540 for (@{$_[3]}) { |
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541 my($symbol,$lineno)=@$_; |
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542 |
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543 exists($$token{$symbol}) |
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544 and do { |
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545 _SyntaxError(0, |
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546 "Token $symbol redefined: ". |
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547 "Previously defined line $$syms{$symbol}", |
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548 $lineno); |
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549 next; |
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550 }; |
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551 $$token{$symbol}=$lineno; |
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552 $$term{$symbol} = [ ]; |
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553 } |
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554 undef |
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555 } |
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556 ], |
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557 [#Rule 12 |
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558 'decl', 4, |
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559 sub |
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560 #line 84 "YappParse.yp" |
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561 { |
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562 for (@{$_[3]}) { |
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563 my($symbol,$lineno)=@$_; |
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564 |
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565 defined($$term{$symbol}[0]) |
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566 and do { |
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567 _SyntaxError(1, |
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568 "Precedence for symbol $symbol redefined: ". |
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569 "Previously defined line $$syms{$symbol}", |
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570 $lineno); |
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571 next; |
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572 }; |
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573 $$token{$symbol}=$lineno; |
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574 $$term{$symbol} = [ $_[1][0], $prec ]; |
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575 } |
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576 ++$prec; |
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577 undef |
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578 } |
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579 ], |
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580 [#Rule 13 |
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581 'decl', 3, |
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582 sub |
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583 #line 102 "YappParse.yp" |
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584 { $start=$_[2][0]; undef } |
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585 ], |
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586 [#Rule 14 |
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587 'decl', 2, |
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588 sub |
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589 #line 103 "YappParse.yp" |
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590 { push(@$head,$_[1]); undef } |
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591 ], |
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592 [#Rule 15 |
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593 'decl', 3, |
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594 sub |
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595 #line 104 "YappParse.yp" |
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596 { undef } |
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597 ], |
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598 [#Rule 16 |
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599 'decl', 4, |
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600 sub |
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601 #line 106 "YappParse.yp" |
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602 { |
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603 for ( @{$_[3]} ) { |
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604 my($symbol,$lineno)=@$_; |
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605 |
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606 exists($$nterm{$symbol}) |
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607 and do { |
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608 _SyntaxError(0, |
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609 "Non-terminal $symbol redefined: ". |
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610 "Previously defined line $$syms{$symbol}", |
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611 $lineno); |
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612 next; |
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613 }; |
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614 delete($$term{$symbol}); #not a terminal |
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615 $$nterm{$symbol}=undef; #is a non-terminal |
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616 } |
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617 } |
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618 ], |
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619 [#Rule 17 |
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620 'decl', 3, |
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621 sub |
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622 #line 122 "YappParse.yp" |
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623 { $expect=$_[2][0]; undef } |
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624 ], |
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625 [#Rule 18 |
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626 'decl', 2, |
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627 sub |
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628 #line 123 "YappParse.yp" |
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629 { $_[0]->YYErrok } |
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630 ], |
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631 [#Rule 19 |
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632 'typedecl', 0, undef |
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633 ], |
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634 [#Rule 20 |
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635 'typedecl', 3, undef |
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636 ], |
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637 [#Rule 21 |
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638 'symlist', 2, |
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639 sub |
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640 #line 130 "YappParse.yp" |
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641 { push(@{$_[1]},$_[2]); $_[1] } |
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642 ], |
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643 [#Rule 22 |
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644 'symlist', 1, |
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645 sub |
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646 #line 131 "YappParse.yp" |
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647 { [ $_[1] ] } |
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648 ], |
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649 [#Rule 23 |
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650 'identlist', 2, |
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651 sub |
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652 #line 134 "YappParse.yp" |
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653 { push(@{$_[1]},$_[2]); $_[1] } |
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654 ], |
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655 [#Rule 24 |
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656 'identlist', 1, |
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657 sub |
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658 #line 135 "YappParse.yp" |
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659 { [ $_[1] ] } |
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660 ], |
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661 [#Rule 25 |
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662 'body', 2, |
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663 sub |
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664 #line 140 "YappParse.yp" |
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665 { |
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666 $start |
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667 or $start=$$rules[1][0]; |
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668 |
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669 ref($$nterm{$start}) |
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670 or _SyntaxError(2,"Start symbol $start not found ". |
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671 "in rules section",$_[2][1]); |
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672 |
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673 $$rules[0]=[ '$start', [ $start, chr(0) ], undef, undef ]; |
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674 } |
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675 ], |
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676 [#Rule 26 |
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677 'body', 1, |
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678 sub |
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679 #line 150 "YappParse.yp" |
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680 { _SyntaxError(2,"No rules in input grammar",$_[1][1]); } |
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681 ], |
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682 [#Rule 27 |
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683 'rulesec', 2, undef |
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684 ], |
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685 [#Rule 28 |
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686 'rulesec', 1, undef |
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687 ], |
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688 [#Rule 29 |
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689 'rules', 4, |
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690 sub |
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691 #line 157 "YappParse.yp" |
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692 { _AddRules($_[1],$_[3]); undef } |
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693 ], |
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694 [#Rule 30 |
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695 'rules', 2, |
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696 sub |
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697 #line 158 "YappParse.yp" |
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698 { $_[0]->YYErrok } |
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699 ], |
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700 [#Rule 31 |
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701 'rhss', 3, |
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702 sub |
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703 #line 161 "YappParse.yp" |
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704 { push(@{$_[1]},$_[3]); $_[1] } |
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705 ], |
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706 [#Rule 32 |
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707 'rhss', 1, |
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708 sub |
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709 #line 162 "YappParse.yp" |
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710 { [ $_[1] ] } |
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711 ], |
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712 [#Rule 33 |
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713 'rule', 3, |
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714 sub |
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715 #line 165 "YappParse.yp" |
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716 { push(@{$_[1]}, $_[2], $_[3]); $_[1] } |
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717 ], |
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718 [#Rule 34 |
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719 'rule', 1, |
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720 sub |
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721 #line 166 "YappParse.yp" |
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722 { |
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723 my($code)=undef; |
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724 |
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725 defined($_[1]) |
|
726 and $_[1][-1][0] eq 'CODE' |
|
727 and $code = ${pop(@{$_[1]})}[1]; |
|
728 |
|
729 push(@{$_[1]}, undef, $code); |
|
730 |
|
731 $_[1] |
|
732 } |
|
733 ], |
|
734 [#Rule 35 |
|
735 'rhs', 0, undef |
|
736 ], |
|
737 [#Rule 36 |
|
738 'rhs', 1, undef |
|
739 ], |
|
740 [#Rule 37 |
|
741 'rhselts', 2, |
|
742 sub |
|
743 #line 183 "YappParse.yp" |
|
744 { push(@{$_[1]},$_[2]); $_[1] } |
|
745 ], |
|
746 [#Rule 38 |
|
747 'rhselts', 1, |
|
748 sub |
|
749 #line 184 "YappParse.yp" |
|
750 { [ $_[1] ] } |
|
751 ], |
|
752 [#Rule 39 |
|
753 'rhselt', 1, |
|
754 sub |
|
755 #line 187 "YappParse.yp" |
|
756 { [ 'SYMB', $_[1] ] } |
|
757 ], |
|
758 [#Rule 40 |
|
759 'rhselt', 1, |
|
760 sub |
|
761 #line 188 "YappParse.yp" |
|
762 { [ 'CODE', $_[1] ] } |
|
763 ], |
|
764 [#Rule 41 |
|
765 'prec', 2, |
|
766 sub |
|
767 #line 192 "YappParse.yp" |
|
768 { |
|
769 defined($$term{$_[2][0]}) |
|
770 or do { |
|
771 _SyntaxError(1,"No precedence for symbol $_[2][0]", |
|
772 $_[2][1]); |
|
773 return undef; |
|
774 }; |
|
775 |
|
776 ++$$precterm{$_[2][0]}; |
|
777 $$term{$_[2][0]}[1]; |
|
778 } |
|
779 ], |
|
780 [#Rule 42 |
|
781 'epscode', 0, |
|
782 sub |
|
783 #line 205 "YappParse.yp" |
|
784 { undef } |
|
785 ], |
|
786 [#Rule 43 |
|
787 'epscode', 1, |
|
788 sub |
|
789 #line 206 "YappParse.yp" |
|
790 { $_[1] } |
|
791 ], |
|
792 [#Rule 44 |
|
793 'code', 1, |
|
794 sub |
|
795 #line 209 "YappParse.yp" |
|
796 { $_[1] } |
|
797 ], |
|
798 [#Rule 45 |
|
799 'tail', 0, undef |
|
800 ], |
|
801 [#Rule 46 |
|
802 'tail', 1, |
|
803 sub |
|
804 #line 215 "YappParse.yp" |
|
805 { $tail=$_[1] } |
|
806 ] |
|
807 ], |
|
808 @_); |
|
809 bless($self,$class); |
|
810 } |
|
811 |
|
812 #line 218 "YappParse.yp" |
|
813 |
|
814 sub _Error { |
|
815 my($value)=$_[0]->YYCurval; |
|
816 |
|
817 my($what)= $token ? "input: '$$value[0]'" : "end of input"; |
|
818 |
|
819 _SyntaxError(1,"Unexpected $what",$$value[1]); |
|
820 } |
|
821 |
|
822 sub _Lexer { |
|
823 |
|
824 #At EOF |
|
825 pos($$input) >= length($$input) |
|
826 and return('',[ undef, -1 ]); |
|
827 |
|
828 #In TAIL section |
|
829 $lexlevel > 1 |
|
830 and do { |
|
831 my($pos)=pos($$input); |
|
832 |
|
833 $lineno[0]=$lineno[1]; |
|
834 $lineno[1]=-1; |
|
835 pos($$input)=length($$input); |
|
836 return('TAILCODE',[ substr($$input,$pos), $lineno[0] ]); |
|
837 }; |
|
838 |
|
839 #Skip blanks |
|
840 $lexlevel == 0 |
|
841 ? $$input=~m{\G((?: |
|
842 [\t\ ]+ # Any white space char but \n |
|
843 | \#[^\n]* # Perl like comments |
|
844 | /\*.*?\*/ # C like comments |
|
845 )+)}xsgc |
|
846 : $$input=~m{\G((?: |
|
847 \s+ # any white space char |
|
848 | \#[^\n]* # Perl like comments |
|
849 | /\*.*?\*/ # C like comments |
|
850 )+)}xsgc |
|
851 and do { |
|
852 my($blanks)=$1; |
|
853 |
|
854 #Maybe At EOF |
|
855 pos($$input) >= length($$input) |
|
856 and return('',[ undef, -1 ]); |
|
857 |
|
858 $lineno[1]+= $blanks=~tr/\n//; |
|
859 }; |
|
860 |
|
861 $lineno[0]=$lineno[1]; |
|
862 |
|
863 $$input=~/\G([A-Za-z_][A-Za-z0-9_]*)/gc |
|
864 and return('IDENT',[ $1, $lineno[0] ]); |
|
865 |
|
866 $$input=~/\G('(?:[^'\\]|\\\\|\\'|\\)+?')/gc |
|
867 and do { |
|
868 $1 eq "'error'" |
|
869 and do { |
|
870 _SyntaxError(0,"Literal 'error' ". |
|
871 "will be treated as error token",$lineno[0]); |
|
872 return('IDENT',[ 'error', $lineno[0] ]); |
|
873 }; |
|
874 return('LITERAL',[ $1, $lineno[0] ]); |
|
875 }; |
|
876 |
|
877 $$input=~/\G(%%)/gc |
|
878 and do { |
|
879 ++$lexlevel; |
|
880 return($1, [ $1, $lineno[0] ]); |
|
881 }; |
|
882 |
|
883 $$input=~/\G{/gc |
|
884 and do { |
|
885 my($level,$from,$code); |
|
886 |
|
887 $from=pos($$input); |
|
888 |
|
889 $level=1; |
|
890 while($$input=~/([{}])/gc) { |
|
891 substr($$input,pos($$input)-1,1) eq '\\' #Quoted |
|
892 and next; |
|
893 $level += ($1 eq '{' ? 1 : -1) |
|
894 or last; |
|
895 } |
|
896 $level |
|
897 and _SyntaxError(2,"Unmatched { opened line $lineno[0]",-1); |
|
898 $code = substr($$input,$from,pos($$input)-$from-1); |
|
899 $lineno[1]+= $code=~tr/\n//; |
|
900 return('CODE',[ $code, $lineno[0] ]); |
|
901 }; |
|
902 |
|
903 if($lexlevel == 0) {# In head section |
|
904 $$input=~/\G%(left|right|nonassoc)/gc |
|
905 and return('ASSOC',[ uc($1), $lineno[0] ]); |
|
906 $$input=~/\G%(start)/gc |
|
907 and return('START',[ undef, $lineno[0] ]); |
|
908 $$input=~/\G%(expect)/gc |
|
909 and return('EXPECT',[ undef, $lineno[0] ]); |
|
910 $$input=~/\G%{/gc |
|
911 and do { |
|
912 my($code); |
|
913 |
|
914 $$input=~/\G(.*?)%}/sgc |
|
915 or _SyntaxError(2,"Unmatched %{ opened line $lineno[0]",-1); |
|
916 |
|
917 $code=$1; |
|
918 $lineno[1]+= $code=~tr/\n//; |
|
919 return('HEADCODE',[ $code, $lineno[0] ]); |
|
920 }; |
|
921 $$input=~/\G%(token)/gc |
|
922 and return('TOKEN',[ undef, $lineno[0] ]); |
|
923 $$input=~/\G%(type)/gc |
|
924 and return('TYPE',[ undef, $lineno[0] ]); |
|
925 $$input=~/\G%(union)/gc |
|
926 and return('UNION',[ undef, $lineno[0] ]); |
|
927 $$input=~/\G([0-9]+)/gc |
|
928 and return('NUMBER',[ $1, $lineno[0] ]); |
|
929 |
|
930 } |
|
931 else {# In rule section |
|
932 $$input=~/\G%(prec)/gc |
|
933 and return('PREC',[ undef, $lineno[0] ]); |
|
934 } |
|
935 |
|
936 #Always return something |
|
937 $$input=~/\G(.)/sg |
|
938 or die "Parse::Yapp::Grammar::Parse: Match (.) failed: report as a BUG"; |
|
939 |
|
940 $1 eq "\n" |
|
941 and ++$lineno[1]; |
|
942 |
|
943 ( $1 ,[ $1, $lineno[0] ]); |
|
944 |
|
945 } |
|
946 |
|
947 sub _SyntaxError { |
|
948 my($level,$message,$lineno)=@_; |
|
949 |
|
950 $message= "*". |
|
951 [ 'Warning', 'Error', 'Fatal' ]->[$level]. |
|
952 "* $message, at ". |
|
953 ($lineno < 0 ? "eof" : "line $lineno"). |
|
954 ".\n"; |
|
955 |
|
956 $level > 1 |
|
957 and die $message; |
|
958 |
|
959 warn $message; |
|
960 |
|
961 $level > 0 |
|
962 and ++$nberr; |
|
963 |
|
964 $nberr == 20 |
|
965 and die "*Fatal* Too many errors detected.\n" |
|
966 } |
|
967 |
|
968 sub _AddRules { |
|
969 my($lhs,$lineno)=@{$_[0]}; |
|
970 my($rhss)=$_[1]; |
|
971 |
|
972 ref($$nterm{$lhs}) |
|
973 and do { |
|
974 _SyntaxError(1,"Non-terminal $lhs redefined: ". |
|
975 "Previously declared line $$syms{$lhs}",$lineno); |
|
976 return; |
|
977 }; |
|
978 |
|
979 ref($$term{$lhs}) |
|
980 and do { |
|
981 my($where) = exists($$token{$lhs}) ? $$token{$lhs} : $$syms{$lhs}; |
|
982 _SyntaxError(1,"Non-terminal $lhs previously ". |
|
983 "declared as token line $where",$lineno); |
|
984 return; |
|
985 }; |
|
986 |
|
987 ref($$nterm{$lhs}) #declared through %type |
|
988 or do { |
|
989 $$syms{$lhs}=$lineno; #Say it's declared here |
|
990 delete($$term{$lhs}); #No more a terminal |
|
991 }; |
|
992 $$nterm{$lhs}=[]; #It's a non-terminal now |
|
993 |
|
994 my($epsrules)=0; #To issue a warning if more than one epsilon rule |
|
995 |
|
996 for my $rhs (@$rhss) { |
|
997 my($tmprule)=[ $lhs, [ ], splice(@$rhs,-2) ]; #Init rule |
|
998 |
|
999 @$rhs |
|
1000 or do { |
|
1001 ++$$nullable{$lhs}; |
|
1002 ++$epsrules; |
|
1003 }; |
|
1004 |
|
1005 for (0..$#$rhs) { |
|
1006 my($what,$value)=@{$$rhs[$_]}; |
|
1007 |
|
1008 $what eq 'CODE' |
|
1009 and do { |
|
1010 my($name)='@'.++$labelno."-$_"; |
|
1011 push(@$rules,[ $name, [], undef, $value ]); |
|
1012 push(@{$$tmprule[1]},$name); |
|
1013 next; |
|
1014 }; |
|
1015 push(@{$$tmprule[1]},$$value[0]); |
|
1016 } |
|
1017 push(@$rules,$tmprule); |
|
1018 push(@{$$nterm{$lhs}},$#$rules); |
|
1019 } |
|
1020 |
|
1021 $epsrules > 1 |
|
1022 and _SyntaxError(0,"More than one empty rule for symbol $lhs",$lineno); |
|
1023 } |
|
1024 |
|
1025 sub Parse { |
|
1026 my($self)=shift; |
|
1027 |
|
1028 @_ > 0 |
|
1029 or croak("No input grammar\n"); |
|
1030 |
|
1031 my($parsed)={}; |
|
1032 |
|
1033 $input=\$_[0]; |
|
1034 |
|
1035 $lexlevel=0; |
|
1036 @lineno=(1,1); |
|
1037 $nberr=0; |
|
1038 $prec=0; |
|
1039 $labelno=0; |
|
1040 |
|
1041 $head=(); |
|
1042 $tail=""; |
|
1043 |
|
1044 $syms={}; |
|
1045 $token={}; |
|
1046 $term={}; |
|
1047 $nterm={}; |
|
1048 $rules=[ undef ]; #reserve slot 0 for start rule |
|
1049 $precterm={}; |
|
1050 |
|
1051 $start=""; |
|
1052 $nullable={}; |
|
1053 $expect=0; |
|
1054 |
|
1055 pos($$input)=0; |
|
1056 |
|
1057 |
|
1058 $self->YYParse(yylex => \&_Lexer, yyerror => \&_Error); |
|
1059 |
|
1060 $nberr |
|
1061 and _SyntaxError(2,"Errors detected: No output",-1); |
|
1062 |
|
1063 @$parsed{ 'HEAD', 'TAIL', 'RULES', 'NTERM', 'TERM', |
|
1064 'NULL', 'PREC', 'SYMS', 'START', 'EXPECT' } |
|
1065 = ( $head, $tail, $rules, $nterm, $term, |
|
1066 $nullable, $precterm, $syms, $start, $expect); |
|
1067 |
|
1068 undef($input); |
|
1069 undef($lexlevel); |
|
1070 undef(@lineno); |
|
1071 undef($nberr); |
|
1072 undef($prec); |
|
1073 undef($labelno); |
|
1074 |
|
1075 undef($head); |
|
1076 undef($tail); |
|
1077 |
|
1078 undef($syms); |
|
1079 undef($token); |
|
1080 undef($term); |
|
1081 undef($nterm); |
|
1082 undef($rules); |
|
1083 undef($precterm); |
|
1084 |
|
1085 undef($start); |
|
1086 undef($nullable); |
|
1087 undef($expect); |
|
1088 |
|
1089 $parsed |
|
1090 } |
|
1091 |
|
1092 |
|
1093 1; |
|