Cycript.l.in

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2015  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Affero General Public License, Version 3 {{{ */
   6 /*
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 /* XXX: supposedly I will be screwed on very very long multi-line comments and need to replace these with a manual lexer. http://websrv.cs.fsu.edu/~engelen/courses/COP5621/Pr2.pdf */
  23
  24 %{
  25
  26 #if defined(__clang__)
  27 #pragma clang diagnostic push
  28 #pragma clang diagnostic ignored "-Wunknown-pragmas"
  29 #pragma clang diagnostic ignored "-Wdeprecated-register"
  30 #endif
  31
  32 #define YYLTYPE CYLocation
  33 #include "Cycript.tab.hh"
  34 typedef cy::parser::token tk;
  35
  36 #include "Highlight.hpp"
  37
  38 #define YY_EXTRA_TYPE CYDriver *
  39
  40 // do /not/ fold token to the return: this is a macro and the ordering is dependent
  41 #define F(value, highlight) do { \
  42     int token(value); \
  43 @begin ObjectiveC
  44     yyextra->no_.AtImplementation = false; \
  45 @end
  46     yyextra->no_.Function = false; \
  47     yyextra->no_.OpenBrace = false; \
  48     yylval->highlight_ = highlight; \
  49     return token; \
  50 } while (false)
  51
  52 #define A new($pool)
  53 #define Y $pool.strmemdup(yytext, yyleng)
  54
  55 #define I(type, Type, value, highlight) do { \
  56     yylval->type ## _ = A CY ## Type; \
  57     F(value, highlight); \
  58 } while (false)
  59
  60 #define T yylval->newline_ = yyextra->state_ == CYNewLine; BEGIN(Div);
  61 #define C T yyextra->state_ = CYClear;
  62 #define R T yyextra->state_ = CYRestricted;
  63
  64 #define N \
  65     if (yyextra->state_ != CYNewLine) { \
  66         if (yyextra->state_ != CYRestricted) \
  67             yyextra->state_ = CYNewLine; \
  68         else { \
  69             yyextra->state_ = CYClear; \
  70             F(tk::NewLine, hi::Nothing); \
  71         } \
  72     }
  73
  74 #define V(more) { \
  75     if (const char *nl = reinterpret_cast<const char *>(memchr(yytext, '\n', yyleng))) { \
  76         unsigned lines(0); \
  77         size_t left; \
  78         do { \
  79             ++lines; \
  80             left = yyleng - (nl - yytext) - 1; \
  81             nl = reinterpret_cast<const char *>(memchr(nl + 1, '\n', left)); \
  82         } while (nl != NULL); \
  83         yylloc->step(); \
  84         yylloc->end.lines(lines); \
  85         yylloc->end.columns(left); \
  86         more \
  87     } else L \
  88 }
  89
  90 #define L { \
  91     yylloc->step(); \
  92     yylloc->end.columns(yyleng); \
  93 }
  94
  95 #define M { \
  96     if (yyextra->commented_) { \
  97         I(comment, Comment(Y), tk::Comment, hi::Comment); \
  98     } \
  99 }
 100
 101 int H(char c) {
 102     if (c >= '0' && c <= '9')
 103         return c - '0';
 104     if (c >= 'a' && c <= 'f')
 105         return c - 'a' + 10;
 106     if (c >= 'A' && c <= 'F')
 107         return c - 'A' + 10;
 108     return -1;
 109 }
 110
 111 #define YY_INPUT(data, value, size) { \
 112     if (yyextra->data_.eof()) \
 113         value = YY_NULL; \
 114     else { \
 115         yyextra->data_.read(data, size); \
 116         size_t copy(yyextra->data_.gcount()); \
 117         value = copy == 0 ? YY_NULL : copy; \
 118     } \
 119 }
 120
 121 %}
 122
 123 %option prefix="cy"
 124 %option bison-bridge
 125 %option bison-locations
 126 %option nodefault
 127 %option noyywrap
 128 %option yylineno
 129 %option nounput
 130 %option nounistd
 131 %option 8bit
 132 %option backup
 133 %option batch
 134 %option never-interactive
 135 %option pointer
 136 %option reentrant
 137 %option stack
 138
 139 Exponent [eE][+-]?[0-9]+
 140 Escape   \\[\\'"bfnrtv]|\\0|\\x[0-9a-fA-F]{2}|\\u[0-9a-fA-F]{4}|\\\n
 141
 142 IdentifierStart [a-zA-Z$_]
 143 IdentifierPart  [a-zA-Z$_0-9]
 144
 145 NonTerminator [^\n]
 146 BackslashSequence \\{NonTerminator}
 147 RegularExpressionFirstChar [^\n*\\/]|{BackslashSequence}
 148 RegularExpressionChar [^\n\\/]|{BackslashSequence}
 149 RegularExpressionFlags {IdentifierPart}*
 150 RegularExpressionChars {RegularExpressionChar}*
 151 RegularExpressionBody {RegularExpressionFirstChar}{RegularExpressionChars}
 152
 153 @begin E4X
 154 XMLNameStart [a-zA-Z_:]
 155 XMLNamePart [a-zA-Z0-9.-_:]
 156 XMLName {XMLNameStart}{XMLNamePart}*
 157 @end
 158
 159 %s Div
 160 %s RegExp
 161
 162 @begin E4X
 163 %x XMLContent
 164 %x XMLTag
 165 @end
 166
 167 %%
 168
 169 <RegExp>\/{RegularExpressionBody}\/{RegularExpressionFlags} L C I(literal, RegEx(Y), tk::RegularExpressionLiteral, hi::Constant);
 170
 171 #![^\n]* L M
 172
 173 \/\/[^\n]* L M
 174
 175         /* http://ostermiller.org/findcomment.html */
 176         /* XXX: unify these two rules using !? */
 177 \/\*!([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+\/ V() C I(comment, Comment(Y), tk::Comment, hi::Comment);
 178 \/\*([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+\/ V(N) M
 179
 180 @begin E4X
 181 <RegExp>"<>"      L F(tk::LeftRight, hi::Structure);
 182 <XMLContent>"</>" L F(tk::LeftSlashRight, hi::Structure);
 183
 184 <RegExp,XMLContent>\<!\[CDATA\[(\n|[^[]|\[[^[]|\[\[[^>])*]]> V() F(tk::XMLCDATA, hi::Constant);
 185 <RegExp,XMLContent>\<!--(\n|[^-]|-[^-])*--> V() F(tk::XMLComment, hi::Comment);
 186 <RegExp,XMLContent>\<?(\n|[^?]|\?[^>])*?> V() F(tk::XMLPI, hi::Meta);
 187
 188 <XMLTag>"="  L F(tk::Equal, hi::Structure);
 189 <XMLTag>">"  L F(tk::Right, hi::Structure);
 190 <XMLTag>"/>" L F(tk::SlashRight, hi::Structure);
 191 <XMLTag>"{"  L F(tk::OpenBrace, hi::Structure);
 192
 193 <XMLTag>\"(\n|[^"])*\"|'(\n|[^'])*' V() F(tk::XMLAttributeValue, hi::Constant);
 194 <XMLTag>{XMLName} L F(tk::XMLName, hi::Identifier);
 195 <XMLTag>[ \t\r\n] V() F(tk::XMLWhitespace, hi::Nothing);
 196
 197 <XMLContent>"{"  L F(tk::OpenBrace, hi::Structure);
 198 <XMLContent>"<"  L F(tk::Left, hi::Structure);
 199 <XMLContent>"</" L F(tk::LeftSlash, hi::Structure);
 200 @end
 201
 202 "..."  L C F(tk::PeriodPeriodPeriod, hi::Meta);
 203
 204 @begin E4X
 205 "::"   L C F(tk::ColonColon, hi::Operator);
 206 ".."   L C F(tk::PeriodPeriod, hi::Operator);
 207 @end
 208
 209 @begin E4X ObjectiveC
 210 "@"    L C F(tk::At, hi::Operator);
 211 "#"    L C F(tk::Pound, hi::Operator);
 212 @end
 213
 214 "&"    L C F(tk::Ampersand, hi::Operator);
 215 "&&"   L C F(tk::AmpersandAmpersand, hi::Operator);
 216 "&="   L C F(tk::AmpersandEqual, hi::Operator);
 217 "^"    L C F(tk::Carrot, hi::Operator);
 218 "^="   L C F(tk::CarrotEqual, hi::Operator);
 219 "="    L C F(tk::Equal, hi::Operator);
 220 "=="   L C F(tk::EqualEqual, hi::Operator);
 221 "==="  L C F(tk::EqualEqualEqual, hi::Operator);
 222 "=>"   L C F(tk::EqualRight, hi::Operator);
 223 "!"    L C F(tk::Exclamation, hi::Operator);
 224 "!="   L C F(tk::ExclamationEqual, hi::Operator);
 225 "!=="  L C F(tk::ExclamationEqualEqual, hi::Operator);
 226 "-"    L C F(tk::Hyphen, hi::Operator);
 227 "-="   L C F(tk::HyphenEqual, hi::Operator);
 228 "--"   L C F(yylval->newline_ ? tk::HyphenHyphen_ : tk::HyphenHyphen, hi::Operator);
 229 "->"   L C F(tk::HyphenRight, hi::Operator);
 230 "<"    L C F(tk::Left, hi::Operator);
 231 "<="   L C F(tk::LeftEqual, hi::Operator);
 232 "<<"   L C F(tk::LeftLeft, hi::Operator);
 233 "<<="  L C F(tk::LeftLeftEqual, hi::Operator);
 234 "%"    L C F(tk::Percent, hi::Operator);
 235 "%="   L C F(tk::PercentEqual, hi::Operator);
 236 "."    L C F(tk::Period, hi::Operator);
 237 "|"    L C F(tk::Pipe, hi::Operator);
 238 "|="   L C F(tk::PipeEqual, hi::Operator);
 239 "||"   L C F(tk::PipePipe, hi::Operator);
 240 "+"    L C F(tk::Plus, hi::Operator);
 241 "+="   L C F(tk::PlusEqual, hi::Operator);
 242 "++"   L C F(yylval->newline_ ? tk::PlusPlus_ : tk::PlusPlus, hi::Operator);
 243 ">"    L C F(tk::Right, hi::Operator);
 244 ">="   L C F(tk::RightEqual, hi::Operator);
 245 ">>"   L C F(tk::RightRight, hi::Operator);
 246 ">>="  L C F(tk::RightRightEqual, hi::Operator);
 247 ">>>"  L C F(tk::RightRightRight, hi::Operator);
 248 ">>>=" L C F(tk::RightRightRightEqual, hi::Operator);
 249 "*"    L C F(tk::Star, hi::Operator);
 250 "*="   L C F(tk::StarEqual, hi::Operator);
 251 "~"    L C F(tk::Tilde, hi::Operator);
 252
 253 <Div>"/"  L C F(tk::Slash, hi::Operator);
 254 <Div>"/=" L C F(tk::SlashEqual, hi::Operator);
 255
 256 ":"    L C F(tk::Colon, hi::Structure);
 257 ","    L C F(tk::Comma, hi::Structure);
 258 "?"    L C F(tk::Question, hi::Structure);
 259 ";"    L C F(tk::SemiColon, hi::Structure);
 260
 261 "("    L C F(tk::OpenParen, hi::Structure);
 262 ")"    L C F(tk::CloseParen, hi::Structure);
 263
 264 "{"    L C F(yyextra->no_.OpenBrace ? tk::OpenBrace__ : yylval->newline_ ? tk::OpenBrace_ : tk::OpenBrace, hi::Structure);
 265 "}"    L C F(tk::CloseBrace, hi::Structure);
 266
 267 "["    L C F(tk::OpenBracket, hi::Structure);
 268 "]"    L C F(tk::CloseBracket, hi::Structure);
 269
 270 "@error"          L C F(tk::AtError, hi::Error);
 271
 272 @begin Java
 273 "@class"          L C F(tk::AtClass, hi::Meta);
 274 @end
 275
 276 @begin C
 277 "typedef"         L C I(identifier, Identifier("typedef"), tk::Typedef, hi::Meta);
 278 "unsigned"        L C I(identifier, Identifier("unsigned"), tk::Unsigned, hi::Type);
 279 "signed"          L C I(identifier, Identifier("signed"), tk::Signed, hi::Type);
 280 "extern"          L C I(identifier, Identifier("extern"), tk::Extern, hi::Type);
 281 @end
 282
 283 @begin C
 284 "@encode"         L C F(tk::AtEncode, hi::Meta);
 285 @end
 286
 287 @begin ObjectiveC
 288 "@end"            L C F(tk::AtEnd, hi::Meta);
 289 "@implementation" L C F(yyextra->no_.AtImplementation ? tk::AtImplementation_ : tk::AtImplementation, hi::Meta);
 290 "@import"         L C F(tk::AtImport, hi::Special);
 291 "@selector"       L C F(tk::AtSelector, hi::Meta);
 292
 293 "NULL"         L C I(identifier, Identifier("NULL"), tk::Identifier_, hi::Constant);
 294 "nil"          L C I(identifier, Identifier("nil"), tk::Identifier_, hi::Constant);
 295 "YES"          L C I(identifier, Identifier("YES"), tk::Yes, hi::Constant);
 296 "NO"           L C I(identifier, Identifier("NO"), tk::No, hi::Constant);
 297
 298 "bool"         L C I(identifier, Identifier("bool"), tk::Identifier_, hi::Type);
 299 "BOOL"         L C I(identifier, Identifier("BOOL"), tk::Identifier_, hi::Type);
 300 "id"           L C I(identifier, Identifier("id"), tk::Identifier_, hi::Type);
 301 "SEL"          L C I(identifier, Identifier("SEL"), tk::Identifier_, hi::Type);
 302 @end
 303
 304 "undefined"    L C I(identifier, Identifier("undefined"), tk::Identifier_, hi::Operator);
 305
 306 "false"        L C I(false, False(), tk::False, hi::Constant);
 307 "null"         L C I(null, Null(), tk::Null, hi::Constant);
 308 "true"         L C I(true, True(), tk::True, hi::Constant);
 309
 310 "auto"         L C I(word, Word("auto"), tk::Auto, hi::Meta);
 311 "break"        L R I(word, Word("break"), tk::Break, hi::Control);
 312 "case"         L C I(word, Word("case"), tk::Case, hi::Control);
 313 "catch"        L C I(word, Word("catch"), tk::Catch, hi::Control);
 314 "continue"     L R I(word, Word("continue"), tk::Continue, hi::Control);
 315 "default"      L C I(word, Word("default"), tk::Default, hi::Control);
 316 "delete"       L C I(word, Word("delete"), tk::Delete, hi::Operator);
 317 "do"           L C I(word, Word("do"), tk::Do, hi::Control);
 318 "else"         L C I(word, Word("else"), tk::Else, hi::Control);
 319 "finally"      L C I(word, Word("finally"), tk::Finally, hi::Control);
 320 "for"          L C I(word, Word("for"), tk::For, hi::Control);
 321 "function"     L C I(word, Word("function"), yyextra->no_.Function ? tk::Function_ : tk::Function, hi::Meta);
 322 "if"           L C I(word, Word("if"), tk::If, hi::Control);
 323 "in"           L C I(word, Word("in"), yyextra->in_.top() ? tk::In_ : tk::In, hi::Operator);
 324 "instanceof"   L C I(word, Word("instanceof"), tk::InstanceOf, hi::Operator);
 325 "new"          L C I(word, Word("new"), tk::New, hi::Operator);
 326 "return"       L R I(word, Word("return"), tk::Return, hi::Control);
 327 "switch"       L C I(word, Word("switch"), tk::Switch, hi::Control);
 328 "this"         L C I(this, This(), tk::This, hi::Constant);
 329 "throw"        L R I(word, Word("throw"), tk::Throw, hi::Control);
 330 "try"          L C I(word, Word("try"), tk::Try, hi::Control);
 331 "typeof"       L C I(word, Word("typeof"), tk::TypeOf, hi::Operator);
 332 "var"          L C I(word, Word("var"), tk::Var, hi::Meta);
 333 "void"         L C I(word, Word("void"), tk::Void, hi::Operator);
 334 "while"        L C I(word, Word("while"), tk::While, hi::Control);
 335 "with"         L C I(word, Word("with"), tk::With, hi::Control);
 336
 337 "debugger"     L C I(word, Word("debugger"), tk::Debugger, hi::Meta);
 338
 339 "const"        L C I(word, Word("const"), tk::Const, hi::Meta);
 340
 341 "class"        L C I(word, Word("class"), tk::Class, hi::Meta);
 342 "enum"         L C I(word, Word("enum"), tk::Enum, hi::Meta);
 343 "export"       L C I(word, Word("export"), tk::Export, hi::Meta);
 344 "extends"      L C I(word, Word("extends"), tk::Extends, hi::Meta);
 345 "import"       L C I(word, Word("import"), tk::Import, hi::Meta);
 346 "super"        L C I(word, Word("super"), tk::Super, hi::Constant);
 347
 348 "implements"   L C I(identifier, Identifier("implements"), tk::Implements, hi::Meta);
 349 "interface"    L C I(identifier, Identifier("interface"), tk::Interface, hi::Meta);
 350 "package"      L C I(identifier, Identifier("package"), tk::Package, hi::Meta);
 351 "private"      L C I(identifier, Identifier("private"), tk::Private, hi::Meta);
 352 "protected"    L C I(identifier, Identifier("protected"), tk::Protected, hi::Meta);
 353 "public"       L C I(identifier, Identifier("public"), tk::Public, hi::Meta);
 354 "static"       L C I(identifier, Identifier("static"), tk::Static, hi::Meta);
 355
 356 "abstract"     L C I(identifier, Identifier("abstract"), tk::Abstract, hi::Meta);
 357 "boolean"      L C I(identifier, Identifier("boolean"), tk::Boolean, hi::Type);
 358 "byte"         L C I(identifier, Identifier("byte"), tk::Byte, hi::Type);
 359 "char"         L C I(identifier, Identifier("char"), tk::Char, hi::Type);
 360 "double"       L C I(identifier, Identifier("double"), tk::Double, hi::Type);
 361 "final"        L C I(identifier, Identifier("final"), tk::Final, hi::Meta);
 362 "float"        L C I(identifier, Identifier("float"), tk::Float, hi::Type);
 363 "goto"         L C I(identifier, Identifier("goto"), tk::Goto, hi::Control);
 364 "int"          L C I(identifier, Identifier("int"), tk::Int, hi::Type);
 365 "long"         L C I(identifier, Identifier("long"), tk::Long, hi::Type);
 366 "native"       L C I(identifier, Identifier("native"), tk::Native, hi::Meta);
 367 "short"        L C I(identifier, Identifier("short"), tk::Short, hi::Type);
 368 "synchronized" L C I(identifier, Identifier("synchronized"), tk::Synchronized, hi::Meta);
 369 "throws"       L C I(identifier, Identifier("throws"), tk::Throws, hi::Meta);
 370 "transient"    L C I(identifier, Identifier("transient"), tk::Transient, hi::Meta);
 371 "volatile"     L C I(identifier, Identifier("volatile"), tk::Volatile, hi::Meta);
 372
 373 "let"          L C I(identifier, Identifier("let"), tk::Let, hi::Meta);
 374 "yield"        L C I(identifier, Identifier("yield"), tk::Yield, hi::Control);
 375
 376 "each"         L C I(identifier, Identifier("each"), tk::Each, hi::Control);
 377 "of"           L C I(identifier, Identifier("of"), tk::Of, hi::Operator);
 378
 379 @begin E4X
 380 "namespace"    L C I(identifier, Identifier("namespace"), tk::Namespace, hi::Meta);
 381 "xml"          L C I(identifier, Identifier("xml"), tk::XML, hi::Meta);
 382 @end
 383
 384 {IdentifierStart}{IdentifierPart}* L C I(identifier, Identifier(Y), tk::Identifier_, hi::Identifier);
 385
 386 (\.[0-9]+|(0|[1-9][0-9]*)(\.[0-9]*)?){Exponent}? L C I(number, Number(strtod(yytext, NULL)), tk::NumericLiteral, hi::Constant);
 387
 388 0[xX][0-9a-fA-F]+ L C I(number, Number(strtoull(yytext + 2, NULL, 16)), tk::NumericLiteral, hi::Constant);
 389 0[0-7]+ L C I(number, Number(strtoull(yytext + 1, NULL, 8)), tk::NumericLiteral, hi::Constant);
 390 0[bB][0-1]+ L C I(number, Number(strtoull(yytext + 2, NULL, 2)), tk::NumericLiteral, hi::Constant);
 391
 392 \"([^"\\\n]|{Escape})*\"|'([^'\\\n]|{Escape})*' L C {
 393     char *value(A char[yyleng]);
 394     char *local(value);
 395
 396     for (yy_size_t i(1), e(yyleng - 1); i != e; ++i) {
 397         char next(yytext[i]);
 398
 399         if (yytext[i] == '\\')
 400             switch (next = yytext[++i]) {
 401                 case '\n': continue;
 402                 case '\\': next = '\\'; break;
 403                 case '\'': next = '\''; break;
 404                 case '"': next = '"'; break;
 405                 case 'b': next = '\b'; break;
 406                 case 'f': next = '\f'; break;
 407                 case 'n': next = '\n'; break;
 408                 case 'r': next = '\r'; break;
 409                 case 't': next = '\t'; break;
 410                 case 'v': next = '\v'; break;
 411                 case '0': next = '\0'; break;
 412
 413                 case 'x':
 414                     next = H(yytext[i + 1]) << 4 | H(yytext[i + 2]);
 415                     i += 2;
 416                 break;
 417             }
 418
 419         *local++ = next;
 420     }
 421
 422     *local = '\0';
 423     I(string, String(value, local - value), tk::StringLiteral, hi::Constant);
 424 }
 425
 426 \r?\n|\r|\xe2\x80[\xa8\xa9] yylloc->step(); yylloc->end.lines(); N
 427
 428 [ \t] L
 429
 430 <<EOF>> if (yyextra->auto_) { yyextra->auto_ = false; F(tk::AutoComplete, hi::Nothing); } L yyterminate();
 431
 432 . L {
 433     CYDriver::Error error;
 434     error.location_ = *yylloc;
 435     error.message_ = "syntax error, unknown token";
 436     yyextra->errors_.push_back(error);
 437     yyterminate();
 438 }
 439
 440 %%
 441
 442 void CYDriver::ScannerInit() {
 443     cylex_init(&scanner_);
 444     cyset_extra(this, scanner_);
 445 }
 446
 447 void CYDriver::ScannerDestroy() {
 448     cylex_destroy(scanner_);
 449 }
 450
 451 CYDriver::Condition CYDriver::GetCondition() {
 452     switch (yy_top_state(scanner_)) {
 453         case RegExp:
 454             return RegExpCondition;
 455 @begin E4X
 456         case XMLContent:
 457             return XMLContentCondition;
 458         case XMLTag:
 459             return XMLTagCondition;
 460 @end
 461         default:
 462             _assert(false);
 463     }
 464 }
 465
 466 void CYDriver::SetCondition(Condition condition) {
 467     struct yyguts_t *yyg(reinterpret_cast<struct yyguts_t *>(scanner_));
 468
 469     switch (condition) {
 470         case RegExpCondition:
 471             BEGIN(RegExp);
 472             break;
 473 @begin E4X
 474         case XMLContentCondition:
 475             BEGIN(XMLContent);
 476             break;
 477         case XMLTagCondition:
 478             BEGIN(XMLTag);
 479             break;
 480 @end
 481         default:
 482             _assert(false);
 483     }
 484 }
 485
 486 void CYDriver::PushCondition(Condition condition) {
 487     switch (condition) {
 488         case RegExpCondition:
 489             yy_push_state(RegExp, scanner_);
 490             break;
 491 @begin E4X
 492         case XMLContentCondition:
 493             yy_push_state(XMLContent, scanner_);
 494             break;
 495         case XMLTagCondition:
 496             yy_push_state(XMLTag, scanner_);
 497             break;
 498 @end
 499         default:
 500             _assert(false);
 501     }
 502 }
 503
 504 void CYDriver::PopCondition() {
 505     yy_pop_state(scanner_);
 506 }
 507
 508 #if defined(__clang__)
 509 #pragma clang diagnostic pop
 510 #endif