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 %top{
  23 #if defined(__clang__)
  24 #pragma clang diagnostic push
  25 #pragma clang diagnostic ignored "-Wdeprecated-register"
  26 #pragma clang diagnostic ignored "-Wunused-function"
  27 #pragma clang diagnostic ignored "-Wunused-variable"
  28 #else
  29 #pragma GCC diagnostic push
  30 #pragma GCC diagnostic ignored "-Wsign-compare"
  31 #pragma GCC diagnostic ignored "-Wunused-function"
  32 #pragma GCC diagnostic ignored "-Wunused-variable"
  33 #endif
  34 }
  35
  36 %{
  37
  38 #define YYLTYPE CYLocation
  39 #include "Cycript.tab.hh"
  40 typedef cy::parser::token tk;
  41
  42 #include "Highlight.hpp"
  43
  44 #define YY_EXTRA_TYPE CYDriver *
  45
  46 #define F(value, highlight) do { \
  47     yyextra->newline_ = yyextra->last_; \
  48     yyextra->last_ = false; \
  49     yyextra->next_ = false; \
  50     BEGIN(yyextra->template_.top() ? DivOrTemplateTail : Div); \
  51     yylval->highlight_ = highlight; \
  52     return value; \
  53 } while (false)
  54
  55 #define P yyextra->pool_
  56 #define A new(P)
  57 #define Y P.strmemdup(yytext, yyleng)
  58
  59 #define I(type, Type, value, highlight) do { \
  60     yylval->semantic_.type ## _ = A CY ## Type; \
  61     F(value, highlight); \
  62 } while (false)
  63
  64 #define N \
  65     if (yyextra->last_ && yyextra->next_) { \
  66         yyextra->last_ = false; \
  67         F(tk::NewLine, hi::Nothing); \
  68     }
  69
  70 #define V(more) { \
  71     if (const char *nl = reinterpret_cast<const char *>(memchr(yytext, '\n', yyleng))) { \
  72         unsigned lines(0); \
  73         size_t left; \
  74         do { \
  75             ++lines; \
  76             left = yyleng - (nl - yytext) - 1; \
  77             nl = reinterpret_cast<const char *>(memchr(nl + 1, '\n', left)); \
  78         } while (nl != NULL); \
  79         yylloc->step(); \
  80         yylloc->end.lines(lines); \
  81         yylloc->end.columns(left); \
  82         more \
  83     } else L \
  84 }
  85
  86 #define R yylloc->end.columns(yyleng);
  87 #define L yylloc->step(); R
  88
  89 #define H(value, highlight) do { \
  90     if (yyextra->highlight_) \
  91         F(value, highlight); \
  92 } while (false)
  93
  94 #define M \
  95     H(tk::Comment, hi::Comment);
  96
  97 #define E(message) { \
  98     CYDriver::Error error; \
  99     error.location_ = *yylloc; \
 100     error.message_ = "syntax error, " message; \
 101     yyextra->errors_.push_back(error); \
 102     yyterminate(); \
 103 }
 104
 105 int X(char c) {
 106     if (c >= '0' && c <= '9')
 107         return c - '0';
 108     if (c >= 'a' && c <= 'f')
 109         return c - 'a' + 10;
 110     if (c >= 'A' && c <= 'F')
 111         return c - 'A' + 10;
 112     return -1;
 113 }
 114
 115 template <typename Type_>
 116 static void U(Type_ &local, unsigned point) {
 117     if (false) {
 118     } else if (point < 0x000080) {
 119         *local++ = point;
 120     } else if (point < 0x000800) {
 121         *local++ = 0xc0 | point >> 0x06 & 0x1f;
 122         goto one;
 123     } else if (point < 0x010000) {
 124         *local++ = 0xe0 | point >> 0x0c & 0x0f;
 125         goto two;
 126     } else if (point < 0x110000) {
 127         *local++ = 0xf0 | point >> 0x12 & 0x07;
 128         *local++ = 0x80 | point >> 0x0c & 0x3f;
 129       two:
 130         *local++ = 0x80 | point >> 0x06 & 0x3f;
 131       one:
 132         *local++ = 0x80 | point >> 0x00 & 0x3f;
 133     } else _assert(false);
 134 }
 135
 136 static void U(char *&local, const char *text, yy_size_t &i) {
 137     unsigned point;
 138
 139     char next(text[++i]);
 140     if (next != '{') {
 141         point = X(text[i + 0]) << 12 | X(text[i + 1]) << 8 | X(text[i + 2]) << 4 | X(text[i + 3]);
 142         i += 3;
 143     } else {
 144         point = 0;
 145         for (;;) {
 146             next = text[++i];
 147             if (next == '}')
 148                 break;
 149             point = (point << 4) | X(next);
 150         }
 151     }
 152
 153     U(local, point);
 154 }
 155
 156 #define CYLexBufferPoint(point) do { \
 157     std::back_insert_iterator<std::vector<char> > inserter(yyextra->buffer_); \
 158     U(inserter, point); \
 159 } while (false)
 160
 161 #define CYLexBufferUnit(value) do { \
 162     yyextra->buffer_.push_back(value); \
 163 } while (false)
 164
 165 #define CYLexBufferUnits(data, size) do { \
 166     yyextra->buffer_.insert(yyextra->buffer_.end(), data, data + size); \
 167 } while (false)
 168
 169 #define CYLexBufferStart(condition) do { \
 170     yyextra->buffer_.clear(); \
 171     yy_push_state(condition, yyscanner); \
 172 } while (false)
 173
 174 #define CYLexBufferEnd(type, Type, value, highlight) do { \
 175     yy_pop_state(yyscanner); \
 176     I(type, Type(P.strmemdup(yyextra->buffer_.data(), yyextra->buffer_.size()), yyextra->buffer_.size()), value, highlight); \
 177 } while (false)
 178
 179 #define YY_INPUT(data, value, size) { \
 180     if (yyextra->data_.eof()) \
 181         value = YY_NULL; \
 182     else { \
 183         yyextra->data_.read(data, size); \
 184         size_t copy(yyextra->data_.gcount()); \
 185         value = copy == 0 ? YY_NULL : copy; \
 186     } \
 187 }
 188
 189 %}
 190
 191 %option prefix="cy"
 192 %option bison-bridge
 193 %option bison-locations
 194 %option nodefault
 195 %option noyywrap
 196 %option noyylineno
 197 %option nounput
 198 %option nounistd
 199 %option 8bit
 200 %option backup
 201 %option batch
 202 %option never-interactive
 203 %option pointer
 204 %option reentrant
 205 %option stack
 206
 207 %option full
 208 %option ecs
 209
 210 U1 [\x00-\x7f]
 211 U0 [\x80-\xbf]
 212 U2 [\xc2-\xdf]
 213 U3 [\xe0-\xef]
 214 U4 [\xf0-\xf4]
 215 UN [\xc0-\xc1\xf5-\xff]
 216
 217 HexDigit [0-9a-fA-F]
 218 LineTerminatorSequence \r?\n|\r|\xe2\x80[\xa8\xa9]
 219 WhiteSpace [\x09\x0b\x0c\x20]|\xc2\xa0|\xef\xbb\xbf
 220 UnicodeEscape \\u({HexDigit}{4}|\{{HexDigit}+\})
 221
 222 @include NotLineTerminator.l
 223 CommentCharacter [^*/]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 224 SingleCharacter [^'\\]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 225 DoubleCharacter [^"\\]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 226 PlateCharacter [^$`\\]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 227
 228 @include UnicodeIDStart.l
 229 @include UnicodeIDContinue.l
 230 IdentifierMore [$_]
 231
 232 UnicodeStart {IdentifierMore}|{UnicodeIDStart}
 233 UnicodePart {IdentifierMore}|\xe2\x80[\x8c\x8d]|{UnicodeIDContinue}
 234 UnicodeFail {U2}|{U3}|{U3}{U0}|{U4}|{U4}{U0}|{U4}{U0}{U0}|{UN}|{U0}
 235 UnicodeScrap {UnicodePart}*{UnicodeFail}?
 236
 237 IdentifierStart {UnicodeStart}|{UnicodeEscape}
 238 IdentifierPart {UnicodePart}|{UnicodeEscape}
 239 IdentifierFail {UnicodeFail}|\\(u({HexDigit}{0,3}|\{{HexDigit}*))?
 240 IdentifierScrap {IdentifierPart}*{IdentifierFail}?
 241
 242 NonTerminator [^\n]
 243 BackslashSequence \\{NonTerminator}
 244 RegularExpressionFirstChar [^\n*\\/]|{BackslashSequence}
 245 RegularExpressionChar [^\n\\/]|{BackslashSequence}
 246 RegularExpressionFlags {UnicodePart}*
 247 RegularExpressionChars {RegularExpressionChar}*
 248 RegularExpressionBody {RegularExpressionFirstChar}{RegularExpressionChars}
 249
 250 @begin E4X
 251 XMLNameStart [a-zA-Z_:]
 252 XMLNamePart [a-zA-Z0-9.-_:]
 253 XMLName {XMLNameStart}{XMLNamePart}*
 254 @end
 255
 256 %x MultiLine
 257
 258 %x LegacySingleString
 259 %x LegacyDoubleString
 260
 261 %x StrictSingleString
 262 %x StrictDoubleString
 263 %x StrictAccentString
 264
 265 %s Div
 266 %s DivOrTemplateTail
 267 %s RegExp
 268 %s RegExpOrTemplateTail
 269
 270 @begin E4X
 271 %x XMLContent
 272 %x XMLTag
 273 @end
 274
 275 %%
 276
 277     /* RegEx {{{ */
 278 <RegExp,RegExpOrTemplateTail>{
 279     \/{RegularExpressionBody}\/{RegularExpressionFlags} L I(literal, RegEx(Y), tk::RegularExpressionLiteral, hi::Constant);
 280     \/{RegularExpressionBody}\/{RegularExpressionFlags}{UnicodeFail} L E("invalid flags")
 281     \/{RegularExpressionBody}?\\? L E("unterminated regex")
 282 }
 283     /* }}} */
 284     /* Comment {{{ */
 285 #![^\n]* L M
 286 \/\/[^\n]* L M
 287
 288 \/\* L yy_push_state(MultiLine, yyscanner);
 289
 290 <MultiLine>{
 291     \**\*\/ R yy_pop_state(yyscanner); M N
 292     \**{LineTerminatorSequence} yylloc->end.lines(); yyextra->last_ = true;
 293     \**{CommentCharacter}|\/ R
 294     \**({UnicodeFail}|\*) R E("invalid comment");
 295     <<EOF>> R E("invalid comment")
 296 }
 297     /* }}} */
 298     /* Element {{{ */
 299 @begin E4X
 300 <RegExp>"<>"      L F(tk::LeftRight, hi::Structure);
 301 <XMLContent>"</>" L F(tk::LeftSlashRight, hi::Structure);
 302
 303 <RegExp,XMLContent>\<!\[CDATA\[(\n|[^[]|\[[^[]|\[\[[^>])*]]> V() F(tk::XMLCDATA, hi::Constant);
 304 <RegExp,XMLContent>\<!--(\n|[^-]|-[^-])*--> V() F(tk::XMLComment, hi::Comment);
 305 <RegExp,XMLContent>\<?(\n|[^?]|\?[^>])*?> V() F(tk::XMLPI, hi::Meta);
 306
 307 <XMLTag>"="  L F(tk::Equal, hi::Structure);
 308 <XMLTag>">"  L F(tk::Right, hi::Structure);
 309 <XMLTag>"/>" L F(tk::SlashRight, hi::Structure);
 310 <XMLTag>"{"  L F(tk::OpenBrace, hi::Structure);
 311
 312 <XMLTag>\"(\n|[^"])*\"|'(\n|[^'])*' V() F(tk::XMLAttributeValue, hi::Constant);
 313 <XMLTag>{XMLName} L F(tk::XMLName, hi::Identifier);
 314 <XMLTag>[ \t\r\n] V() F(tk::XMLWhitespace, hi::Nothing);
 315
 316 <XMLContent>"{"  L F(tk::OpenBrace, hi::Structure);
 317 <XMLContent>"<"  L F(tk::Left, hi::Structure);
 318 <XMLContent>"</" L F(tk::LeftSlash, hi::Structure);
 319 @end
 320     /* }}} */
 321     /* Operator {{{ */
 322 "..."  L F(tk::PeriodPeriodPeriod, hi::Meta);
 323 ".."   L E("invalid operator")
 324
 325 @begin E4X
 326 "::"   L F(tk::ColonColon, hi::Operator);
 327 ".."   L F(tk::PeriodPeriod, hi::Operator);
 328 @end
 329
 330 @begin E4X ObjectiveC
 331 "@"    L F(tk::At, hi::Operator);
 332 "#"    L F(tk::Pound, hi::Operator);
 333 @end
 334
 335 "&"    L F(tk::Ampersand, hi::Operator);
 336 "&&"   L F(tk::AmpersandAmpersand, hi::Operator);
 337 "&="   L F(tk::AmpersandEqual, hi::Operator);
 338 "^"    L F(tk::Carrot, hi::Operator);
 339 "^="   L F(tk::CarrotEqual, hi::Operator);
 340 "="    L F(tk::Equal, hi::Operator);
 341 "=="   L F(tk::EqualEqual, hi::Operator);
 342 "==="  L F(tk::EqualEqualEqual, hi::Operator);
 343 "=>"   L F(yyextra->newline_ ? tk::EqualRight_ : tk::EqualRight, hi::Operator);
 344 "!"    L F(tk::Exclamation, hi::Operator);
 345 "!="   L F(tk::ExclamationEqual, hi::Operator);
 346 "!=="  L F(tk::ExclamationEqualEqual, hi::Operator);
 347 "-"    L F(tk::Hyphen, hi::Operator);
 348 "-="   L F(tk::HyphenEqual, hi::Operator);
 349 "--"   L F(yyextra->newline_ ? tk::HyphenHyphen_ : tk::HyphenHyphen, hi::Operator);
 350 "->"   L F(tk::HyphenRight, hi::Operator);
 351 "<"    L F(tk::Left, hi::Operator);
 352 "<="   L F(tk::LeftEqual, hi::Operator);
 353 "<<"   L F(tk::LeftLeft, hi::Operator);
 354 "<<="  L F(tk::LeftLeftEqual, hi::Operator);
 355 "%"    L F(tk::Percent, hi::Operator);
 356 "%="   L F(tk::PercentEqual, hi::Operator);
 357 "."    L F(tk::Period, hi::Operator);
 358 "|"    L F(tk::Pipe, hi::Operator);
 359 "|="   L F(tk::PipeEqual, hi::Operator);
 360 "||"   L F(tk::PipePipe, hi::Operator);
 361 "+"    L F(tk::Plus, hi::Operator);
 362 "+="   L F(tk::PlusEqual, hi::Operator);
 363 "++"   L F(yyextra->newline_ ? tk::PlusPlus_ : tk::PlusPlus, hi::Operator);
 364 ">"    L F(tk::Right, hi::Operator);
 365 ">="   L F(tk::RightEqual, hi::Operator);
 366 ">>"   L F(tk::RightRight, hi::Operator);
 367 ">>="  L F(tk::RightRightEqual, hi::Operator);
 368 ">>>"  L F(tk::RightRightRight, hi::Operator);
 369 ">>>=" L F(tk::RightRightRightEqual, hi::Operator);
 370 "*"    L F(tk::Star, hi::Operator);
 371 "*="   L F(tk::StarEqual, hi::Operator);
 372 "~"    L F(tk::Tilde, hi::Operator);
 373
 374 <Div,DivOrTemplateTail>"/"  L F(tk::Slash, hi::Operator);
 375 <Div,DivOrTemplateTail>"/=" L F(tk::SlashEqual, hi::Operator);
 376
 377 ":"    L F(tk::Colon, hi::Structure);
 378 ","    L F(tk::Comma, hi::Structure);
 379 "?"    L F(tk::Question, hi::Structure);
 380 ";"    L F(tk::SemiColon, hi::Structure);
 381
 382 "("    L F(tk::OpenParen, hi::Structure);
 383 ")"    L F(tk::CloseParen, hi::Structure);
 384
 385 "{"    L yyextra->template_.push(false); F(yyextra->newline_ ? tk::OpenBrace_ : tk::OpenBrace, hi::Structure);
 386 <Div,RegExp>"}" L yyextra->template_.pop(); F(tk::CloseBrace, hi::Structure);
 387
 388 "["    L F(tk::OpenBracket, hi::Structure);
 389 "]"    L F(tk::CloseBracket, hi::Structure);
 390     /* }}} */
 391     /* Keyword {{{ */
 392 "@error"          L F(tk::At_error_, hi::Error);
 393
 394 @begin Java
 395 "@class"          L F(tk::At_class_, hi::Meta);
 396 @end
 397
 398 @begin C
 399 "@encode"         L F(tk::At_encode_, hi::Meta);
 400 @end
 401
 402 @begin ObjectiveC
 403 "@end"            L F(tk::At_end_, hi::Meta);
 404 "@false"          L F(tk::At_false_, hi::Constant);
 405 "@implementation" L F(tk::At_implementation_, hi::Meta);
 406 "@import"         L F(tk::At_import_, hi::Special);
 407 "@NO"             L F(tk::At_NO_, hi::Constant);
 408 "@null"           L F(tk::At_null_, hi::Constant);
 409 "@selector"       L F(tk::At_selector_, hi::Meta);
 410 "@true"           L F(tk::At_true_, hi::Constant);
 411 "@YES"            L F(tk::At_YES_, hi::Constant);
 412 @end
 413
 414 @({UnicodeStart}{UnicodeScrap}|{UnicodeFail}) L E("invalid keyword")
 415     /* }}} */
 416     /* Highlight {{{ */
 417 "undefined"       L F(tk::_undefined_, hi::Operator);
 418
 419 @begin ObjectiveC
 420 "bool"            L F(tk::_bool_, hi::Type);
 421 "BOOL"            L F(tk::_BOOL_, hi::Type);
 422 "id"              L F(tk::_id_, hi::Type);
 423 "nil"             L F(tk::_nil_, hi::Constant);
 424 "NULL"            L F(tk::_NULL_, hi::Constant);
 425 "SEL"             L F(tk::_SEL_, hi::Type);
 426 @end
 427     /* }}} */
 428     /* Reserved {{{ */
 429 "abstract"        L /*FII*/ F(tk::_abstract_, hi::Meta);
 430 "await"           L /*II?*/ F(tk::_await_, hi::Meta);
 431 "boolean"         L /*FII*/ F(tk::_boolean_, hi::Type);
 432 "break"           L /*KKK*/ F(tk::_break_, hi::Control);
 433 "byte"            L /*FII*/ F(tk::_byte_, hi::Type);
 434 "case"            L /*KKK*/ F(tk::_case_, hi::Control);
 435 "catch"           L /*KKK*/ F(tk::_catch_, hi::Control);
 436 "char"            L /*FII*/ F(tk::_char_, hi::Type);
 437 "class"           L /*FFK*/ F(tk::_class_, hi::Meta);
 438 "const"           L /*FFK*/ F(tk::_const_, hi::Meta);
 439 "continue"        L /*KKK*/ F(tk::_continue_, hi::Control);
 440 "debugger"        L /*FKK*/ F(tk::_debugger_, hi::Meta);
 441 "default"         L /*KKK*/ F(tk::_default_, hi::Control);
 442 "delete"          L /*KKK*/ F(tk::_delete_, hi::Operator);
 443 "do"              L /*KKK*/ F(tk::_do_, hi::Control);
 444 "double"          L /*FII*/ F(tk::_double_, hi::Type);
 445 "else"            L /*KKK*/ F(tk::_else_, hi::Control);
 446 "enum"            L /*FFF*/ F(tk::_enum_, hi::Meta);
 447 "export"          L /*FFK*/ F(tk::_export_, hi::Meta);
 448 "extends"         L /*FFK*/ F(tk::_extends_, hi::Meta);
 449 "false"           L /*LLL*/ F(tk::_false_, hi::Constant);
 450 "final"           L /*FII*/ F(tk::_final_, hi::Meta);
 451 "finally"         L /*KKK*/ F(tk::_finally_, hi::Control);
 452 "float"           L /*FII*/ F(tk::_float_, hi::Type);
 453 "for"             L /*KKK*/ F(tk::_for_, hi::Control);
 454 "function"        L /*KKK*/ F(tk::_function_, hi::Meta);
 455 "goto"            L /*FII*/ F(tk::_goto_, hi::Control);
 456 "if"              L /*KKK*/ F(tk::_if_, hi::Control);
 457 "implements"      L /*FSS*/ F(tk::_implements_, hi::Meta);
 458 "import"          L /*FFK*/ F(tk::_import_, hi::Meta);
 459 "in"              L /*KKK*/ F(yyextra->in_.top() ? tk::_in__ : tk::_in_, hi::Operator);
 460 "instanceof"      L /*KKK*/ F(tk::_instanceof_, hi::Operator);
 461 "int"             L /*FII*/ F(tk::_int_, hi::Type);
 462 "interface"       L /*FSS*/ F(tk::_interface_, hi::Meta);
 463 "let"             L /*IS?*/ F(tk::_let_, hi::Meta);
 464 "long"            L /*FII*/ F(tk::_long_, hi::Type);
 465 "native"          L /*FII*/ F(tk::_native_, hi::Meta);
 466 "new"             L /*KKK*/ F(tk::_new_, hi::Operator);
 467 "null"            L /*LLL*/ F(tk::_null_, hi::Constant);
 468 "package"         L /*FSS*/ F(tk::_package_, hi::Meta);
 469 "private"         L /*FSS*/ F(tk::_private_, hi::Meta);
 470 "protected"       L /*FSS*/ F(tk::_protected_, hi::Meta);
 471 "public"          L /*FSS*/ F(tk::_public_, hi::Meta);
 472 "return"          L /*KKK*/ F(tk::_return_, hi::Control);
 473 "short"           L /*FII*/ F(tk::_short_, hi::Type);
 474 "static"          L /*FS?*/ F(tk::_static_, hi::Meta);
 475 "super"           L /*FFK*/ F(tk::_super_, hi::Constant);
 476 "switch"          L /*KKK*/ F(tk::_switch_, hi::Control);
 477 "synchronized"    L /*FII*/ F(tk::_synchronized_, hi::Meta);
 478 "this"            L /*KKK*/ F(tk::_this_, hi::Constant);
 479 "throw"           L /*KKK*/ F(tk::_throw_, hi::Control);
 480 "throws"          L /*FII*/ F(tk::_throws_, hi::Meta);
 481 "transient"       L /*FII*/ F(tk::_transient_, hi::Meta);
 482 "true"            L /*LLL*/ F(tk::_true_, hi::Constant);
 483 "try"             L /*KKK*/ F(tk::_try_, hi::Control);
 484 "typeof"          L /*KKK*/ F(tk::_typeof_, hi::Operator);
 485 "var"             L /*KKK*/ F(tk::_var_, hi::Meta);
 486 "void"            L /*KKK*/ F(tk::_void_, hi::Operator);
 487 "volatile"        L /*FII*/ F(tk::_volatile_, hi::Meta);
 488 "while"           L /*KKK*/ F(tk::_while_, hi::Control);
 489 "with"            L /*KKK*/ F(tk::_with_, hi::Control);
 490 "yield"           L /*IS?*/ F(tk::_yield_, hi::Control);
 491
 492 "auto"            L F(tk::_auto_, hi::Meta);
 493 "each"            L F(tk::_each_, hi::Control);
 494 "of"              L F(tk::_of_, hi::Operator);
 495
 496 @begin C
 497 "extern"          L F(tk::_extern_, hi::Type);
 498 "signed"          L F(tk::_signed_, hi::Type);
 499 "typedef"         L F(tk::_typedef_, hi::Meta);
 500 "unsigned"        L F(tk::_unsigned_, hi::Type);
 501 @end
 502
 503 @begin ObjectiveC
 504 "NO"              L F(tk::_NO_, hi::Constant);
 505 "YES"             L F(tk::_YES_, hi::Constant);
 506 @end
 507
 508 @begin E4X
 509 "namespace"       L F(tk::_namespace_, hi::Meta);
 510 "xml"             L F(tk::_xml_, hi::Meta);
 511 @end
 512     /* }}} */
 513     /* Identifier {{{ */
 514 {UnicodeStart}{UnicodePart}* L I(identifier, Identifier(Y), tk::Identifier_, hi::Identifier);
 515
 516 {IdentifierStart}{IdentifierPart}* L {
 517     char *value(A char[yyleng + 1]);
 518     char *local(value);
 519
 520     for (yy_size_t i(0), e(yyleng); i != e; ++i) {
 521         char next(yytext[i]);
 522         if (next != '\\')
 523             *local++ = next;
 524         else
 525             U(local, yytext, ++i);
 526     }
 527
 528     *local = '\0';
 529     I(identifier, Identifier(value), tk::Identifier_, hi::Identifier);
 530 }
 531
 532 ({IdentifierStart}{IdentifierPart}*)?{IdentifierFail} L E("invalid identifier")
 533     /* }}} */
 534     /* Number {{{ */
 535 0[0-7]+ L I(number, Number(strtoull(yytext + 1, NULL, 8)), tk::NumericLiteral, hi::Constant);
 536 0[0-9]+ L I(number, Number(strtoull(yytext + 1, NULL, 10)), tk::NumericLiteral, hi::Constant);
 537
 538 0[xX][0-9a-fA-F]+ L I(number, Number(strtoull(yytext + 2, NULL, 16)), tk::NumericLiteral, hi::Constant);
 539 0[oO][0-7]+ L I(number, Number(strtoull(yytext + 2, NULL, 8)), tk::NumericLiteral, hi::Constant);
 540 0[bB][0-1]+ L I(number, Number(strtoull(yytext + 2, NULL, 2)), tk::NumericLiteral, hi::Constant);
 541
 542 (\.[0-9]+|(0|[1-9][0-9]*)(\.[0-9]*)?)([eE][+-]?[0-9]+)? L I(number, Number(strtod(yytext, NULL)), tk::NumericLiteral, hi::Constant);
 543 (\.[0-9]+|(0|[1-9][0-9]*)(\.[0-9]*)?)[eE][+-]?{IdentifierScrap} L E("invalid exponent")
 544 (\.?[0-9]|(0|[1-9][0-9]*)\.){IdentifierScrap} L E("invalid number")
 545     /* }}} */
 546     /* String {{{ */
 547 \' L CYLexBufferStart(LegacySingleString);
 548 <LegacySingleString,StrictSingleString>{
 549     \' R CYLexBufferEnd(string, String, tk::StringLiteral, hi::Constant);
 550     {SingleCharacter}+ R CYLexBufferUnits(yytext, yyleng);
 551     {SingleCharacter}*{UnicodeFail} R E("invalid character");
 552     {LineTerminatorSequence} R E("invalid newline");
 553 }
 554
 555 \" L CYLexBufferStart(LegacyDoubleString);
 556 <LegacyDoubleString,StrictDoubleString>{
 557     \" R CYLexBufferEnd(string, String, tk::StringLiteral, hi::Constant);
 558     {DoubleCharacter}+ R CYLexBufferUnits(yytext, yyleng);
 559     {DoubleCharacter}*{UnicodeFail} R E("invalid character");
 560     {LineTerminatorSequence} R E("invalid newline");
 561 }
 562     /* }}} */
 563     /* Template {{{ */
 564 "`" L yyextra->tail_ = false; CYLexBufferStart(StrictAccentString);
 565 <DivOrTemplateTail,RegExpOrTemplateTail>"}" L yyextra->tail_ = true; yyextra->template_.pop(); CYLexBufferStart(StrictAccentString);
 566
 567 <StrictAccentString>{
 568     "`" R CYLexBufferEnd(string, String, yyextra->tail_ ? tk::TemplateTail : tk::NoSubstitutionTemplate, hi::Constant);
 569     "${" R yyextra->template_.push(true); CYLexBufferEnd(string, String, yyextra->tail_ ? tk::TemplateMiddle : tk::TemplateHead, hi::Constant);
 570
 571     "$" R CYLexBufferUnit('$');
 572
 573     {PlateCharacter}+ R CYLexBufferUnits(yytext, yyleng);
 574     {PlateCharacter}*{UnicodeFail} R E("invalid character");
 575     {LineTerminatorSequence} R E("invalid newline");
 576 }
 577     /* }}} */
 578     /* Escapes {{{ */
 579 <LegacySingleString,LegacyDoubleString>{
 580     \\[0-3][0-7][0-7] R CYLexBufferPoint(X(yytext[1]) << 6 | X(yytext[2]) << 3 | X(yytext[3]));
 581     \\[0-7][0-7] R CYLexBufferUnit(X(yytext[1]) << 3 | X(yytext[2]));
 582     \\[0-7] R CYLexBufferUnit(X(yytext[1]));
 583 }
 584
 585 <StrictSingleString,StrictDoubleString,StrictAccentString>{
 586     \\0[0-7] R E("legacy escape");
 587     \\0 R CYLexBufferUnit('\0');
 588 }
 589
 590 <LegacySingleString,LegacyDoubleString,StrictSingleString,StrictDoubleString,StrictAccentString>{
 591     \\b R CYLexBufferUnit('\b');
 592     \\f R CYLexBufferUnit('\f');
 593     \\n R CYLexBufferUnit('\n');
 594     \\r R CYLexBufferUnit('\r');
 595     \\t R CYLexBufferUnit('\t');
 596     \\v R CYLexBufferUnit('\v');
 597
 598     \\x{HexDigit}{2} R CYLexBufferPoint(X(yytext[2]) << 4 | X(yytext[3]));
 599
 600     \\u{HexDigit}{4} R CYLexBufferPoint(X(yytext[2]) << 12 | X(yytext[3]) << 8 | X(yytext[4]) << 4 | X(yytext[5]));
 601
 602     \\u\{{HexDigit}+\} R {
 603         unsigned point(0);
 604         for (yy_size_t i(3); i != yyleng - 1; ++i)
 605             point = point << 4 | X(yytext[i]);
 606         CYLexBufferPoint(point);
 607     }
 608
 609     \\{LineTerminatorSequence} yylloc->end.lines();
 610     \\(.|{NotLineTerminator}) R CYLexBufferUnits(yytext + 1, yyleng - 1);
 611
 612     \\(x{HexDigit}{0,1}|u({HexDigit}{0,3}|\{{HexDigit}*)|{UnicodeFail})? R E("invalid escape");
 613     <<EOF>> R E("invalid string");
 614 }
 615     /* }}} */
 616
 617 {LineTerminatorSequence} yylloc->step(); yylloc->end.lines(); yyextra->last_ = true; N
 618 {WhiteSpace} L
 619
 620 <<EOF>> if (yyextra->auto_) { yyextra->auto_ = false; F(tk::AutoComplete, hi::Nothing); } L yyterminate();
 621
 622 . L E("invalid character")
 623
 624 %%
 625
 626 void CYDriver::ScannerInit() {
 627     cylex_init(&scanner_);
 628     cyset_extra(this, scanner_);
 629 }
 630
 631 void CYDriver::ScannerDestroy() {
 632     cylex_destroy(scanner_);
 633 }
 634
 635 void CYDriver::SetCondition(Condition condition) {
 636     struct yyguts_t *yyg(reinterpret_cast<struct yyguts_t *>(scanner_));
 637
 638     switch (condition) {
 639         case RegExpCondition:
 640             BEGIN(template_.top() ? RegExpOrTemplateTail : RegExp);
 641             break;
 642 @begin E4X
 643         case XMLContentCondition:
 644             BEGIN(XMLContent);
 645             break;
 646         case XMLTagCondition:
 647             BEGIN(XMLTag);
 648             break;
 649 @end
 650         default:
 651             _assert(false);
 652     }
 653 }
 654
 655 void CYDriver::PushCondition(Condition condition) {
 656     switch (condition) {
 657         case RegExpCondition:
 658             yy_push_state(RegExp, scanner_);
 659             break;
 660 @begin E4X
 661         case XMLContentCondition:
 662             yy_push_state(XMLContent, scanner_);
 663             break;
 664         case XMLTagCondition:
 665             yy_push_state(XMLTag, scanner_);
 666             break;
 667 @end
 668         default:
 669             _assert(false);
 670     }
 671 }
 672
 673 void CYDriver::PopCondition() {
 674     yy_pop_state(scanner_);
 675 }
 676
 677 #if defined(__clang__)
 678 #pragma clang diagnostic pop
 679 #else
 680 // must not pop -Wunused-function
 681 //#pragma GCC diagnostic pop
 682 #endif