Scanner.lpp.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 "Parser.hpp"
  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 S(stack) do { \
  56     if (yyextra->stack.size() == 1) \
  57         E("invalid brace") \
  58     yyextra->stack.pop(); \
  59 } while (false)
  60
  61 #define P yyextra->pool_
  62 #define A new(P)
  63 #define Y P.strmemdup(yytext, yyleng)
  64
  65 #define I(type, Type, value, highlight) do { \
  66     yylval->semantic_.type ## _ = A CY ## Type; \
  67     yylval->semantic_.type ## _->location_ = *yylloc; \
  68     F(value, highlight); \
  69 } while (false)
  70
  71 #define N \
  72     if (yyextra->last_ && yyextra->next_) { \
  73         yyextra->last_ = false; \
  74         F(tk::NewLine, hi::Nothing); \
  75     }
  76
  77 #define V(more) { \
  78     if (const char *nl = reinterpret_cast<const char *>(memchr(yytext, '\n', yyleng))) { \
  79         unsigned lines(0); \
  80         size_t left; \
  81         do { \
  82             ++lines; \
  83             left = yyleng - (nl - yytext) - 1; \
  84             nl = reinterpret_cast<const char *>(memchr(nl + 1, '\n', left)); \
  85         } while (nl != NULL); \
  86         yylloc->step(); \
  87         yylloc->end.Lines(lines); \
  88         yylloc->end.Columns(left); \
  89         more \
  90     } else L \
  91 }
  92
  93 #define R yylloc->end.Columns(yyleng);
  94 #define L yylloc->step(); R
  95
  96 #define H(value, highlight) do { \
  97     if (yyextra->highlight_) \
  98         F(value, highlight); \
  99 } while (false)
 100
 101 #define M \
 102     H(tk::Comment, hi::Comment);
 103
 104 #define E(message) { \
 105     CYDriver::Error error; \
 106     error.location_ = *yylloc; \
 107     error.message_ = "syntax error, " message; \
 108     yyextra->errors_.push_back(error); \
 109     yyterminate(); \
 110 }
 111
 112 int X(char c) {
 113     if (c >= '0' && c <= '9')
 114         return c - '0';
 115     if (c >= 'a' && c <= 'f')
 116         return c - 'a' + 10;
 117     if (c >= 'A' && c <= 'F')
 118         return c - 'A' + 10;
 119     return -1;
 120 }
 121
 122 template <typename Type_>
 123 static void U(Type_ &local, unsigned point) {
 124     if (false) {
 125     } else if (point < 0x000080) {
 126         *local++ = point;
 127     } else if (point < 0x000800) {
 128         *local++ = 0xc0 | point >> 0x06 & 0x1f;
 129         goto one;
 130     } else if (point < 0x010000) {
 131         *local++ = 0xe0 | point >> 0x0c & 0x0f;
 132         goto two;
 133     } else if (point < 0x110000) {
 134         *local++ = 0xf0 | point >> 0x12 & 0x07;
 135         *local++ = 0x80 | point >> 0x0c & 0x3f;
 136       two:
 137         *local++ = 0x80 | point >> 0x06 & 0x3f;
 138       one:
 139         *local++ = 0x80 | point >> 0x00 & 0x3f;
 140     } else _assert(false);
 141 }
 142
 143 static void U(char *&local, const char *text, yy_size_t &i) {
 144     unsigned point;
 145
 146     char next(text[++i]);
 147     if (next != '{') {
 148         point = X(text[i + 0]) << 12 | X(text[i + 1]) << 8 | X(text[i + 2]) << 4 | X(text[i + 3]);
 149         i += 3;
 150     } else {
 151         point = 0;
 152         for (;;) {
 153             next = text[++i];
 154             if (next == '}')
 155                 break;
 156             point = (point << 4) | X(next);
 157         }
 158     }
 159
 160     U(local, point);
 161 }
 162
 163 #define CYLexBufferPoint(point) do { \
 164     std::back_insert_iterator<std::vector<char> > inserter(yyextra->buffer_); \
 165     U(inserter, point); \
 166 } while (false)
 167
 168 #define CYLexBufferUnit(value) do { \
 169     yyextra->buffer_.push_back(value); \
 170 } while (false)
 171
 172 #define CYLexBufferUnits(data, size) do { \
 173     yyextra->buffer_.insert(yyextra->buffer_.end(), data, data + size); \
 174 } while (false)
 175
 176 #define CYLexBufferStart(condition) do { \
 177     yyextra->buffer_.clear(); \
 178     yy_push_state(condition, yyscanner); \
 179 } while (false)
 180
 181 #define CYLexBufferEnd(type, Type, value, highlight) do { \
 182     yy_pop_state(yyscanner); \
 183     I(type, Type(P.strmemdup(yyextra->buffer_.data(), yyextra->buffer_.size()), yyextra->buffer_.size()), value, highlight); \
 184 } while (false)
 185
 186 #define YY_INPUT(data, value, size) { \
 187     if (yyextra->data_.eof()) \
 188         value = YY_NULL; \
 189     else { \
 190         yyextra->data_.read(data, size); \
 191         size_t copy(yyextra->data_.gcount()); \
 192         value = copy == 0 ? YY_NULL : copy; \
 193     } \
 194 }
 195
 196 %}
 197
 198 %option prefix="cy"
 199 %option bison-bridge
 200 %option bison-locations
 201 %option nodefault
 202 %option noyywrap
 203 %option noyylineno
 204 %option nounput
 205 %option nounistd
 206 %option 8bit
 207 %option backup
 208 %option batch
 209 %option never-interactive
 210 %option pointer
 211 %option reentrant
 212 %option stack
 213
 214 U1 [\x00-\x7f]
 215 U0 [\x80-\xbf]
 216 U2 [\xc2-\xdf]
 217 U3 [\xe0-\xef]
 218 U4 [\xf0-\xf4]
 219 UN [\xc0-\xc1\xf5-\xff]
 220 UE {U1}|{U2}|{U3}|{U4}|{UN}
 221
 222 HexDigit [0-9a-fA-F]
 223 LineTerminatorSequence \r?\n|\r|\xe2\x80[\xa8\xa9]
 224 WhiteSpace [\x09\x0b\x0c\x20]|\xc2\xa0|\xef\xbb\xbf
 225 UnicodeEscape \\u({HexDigit}{4}|\{{HexDigit}+\})
 226
 227 @include NotLineTerminator.l
 228 NoneTerminatorCharacter [^\r\n\x80-\xff]|{NotLineTerminator}
 229 RegExCharacter [^/[\\]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 230 RegClsCharacter [^]\\]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 231 CommentCharacter [^*/]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 232 SingleCharacter [^'\\]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 233 DoubleCharacter [^"\\]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 234 PlateCharacter [^$`\\]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 235
 236 @include UnicodeIDStart.l
 237 @include UnicodeIDContinue.l
 238 IdentifierMore [$_]
 239
 240 UnicodeStart {IdentifierMore}|{UnicodeIDStart}
 241 UnicodePart {IdentifierMore}|\xe2\x80[\x8c\x8d]|{UnicodeIDContinue}
 242 UnicodeScrap {U2}|{U3}{U0}{0,1}|{U4}{U0}{0,2}|{UN}|{U0}
 243 UnicodeError ({U2}|{U3}{U0}{0,1}|{U4}{U0}{0,2}){UE}|{UN}|{U0}
 244
 245 IdentifierStart {UnicodeStart}|{UnicodeEscape}
 246 IdentifierPart {UnicodePart}|{UnicodeEscape}
 247 IdentifierFail {UnicodeError}|\\(u({HexDigit}{0,3}|\{{HexDigit}*))?
 248 IdentifierScrap {IdentifierPart}*{IdentifierFail}?
 249
 250 RegularExpressionBackslashSequence \\{NoneTerminatorCharacter}
 251 RegularExpressionClassChars ({RegClsCharacter}|{RegularExpressionBackslashSequence})*
 252
 253 @begin E4X
 254 XMLNameStart [a-zA-Z_:]
 255 XMLNamePart [a-zA-Z0-9.-_:]
 256 XMLName {XMLNameStart}{XMLNamePart}*
 257 @end
 258
 259 %x RegularExpression
 260 %x MultiLine
 261
 262 %x LegacySingleString
 263 %x LegacyDoubleString
 264
 265 %x StrictSingleString
 266 %x StrictDoubleString
 267 %x StrictAccentString
 268
 269 %s Div
 270 %s DivOrTemplateTail
 271
 272 @begin E4X
 273 %x XMLContent
 274 %x XMLTag
 275 @end
 276
 277 %%
 278
 279     /* RegEx {{{ */
 280 <RegularExpression>{
 281     \/{UnicodePart}* R CYLexBufferUnits(yytext, yyleng); CYLexBufferEnd(literal, RegEx, tk::RegularExpressionLiteral, hi::Constant);
 282     \/{UnicodePart}*{UnicodeError} R E("invalid character");
 283
 284     {RegExCharacter}+ R CYLexBufferUnits(yytext, yyleng);
 285
 286     {RegularExpressionBackslashSequence} R CYLexBufferUnits(yytext, yyleng);
 287     \\ R E("invalid escape")
 288
 289     (\\|{RegExCharacter}+)?{LineTerminatorSequence} R E("invalid newline");
 290     (\\|{RegExCharacter}+)?{UnicodeScrap} R E("invalid character");
 291
 292     "["{RegularExpressionClassChars}"]" R CYLexBufferUnits(yytext, yyleng);
 293     "["{RegularExpressionClassChars}\\? R E("invalid class");
 294
 295     "["{RegularExpressionClassChars}\\?{LineTerminatorSequence} R E("invalid newline");
 296     "["{RegularExpressionClassChars}\\?{UnicodeScrap} R E("invalid character");
 297
 298     <<EOF>> R E("unterminated regex")
 299 }
 300     /* }}} */
 301     /* Comment {{{ */
 302 #![^\n]* L M
 303 \/\/[^\n]* L M
 304
 305 \/\* L yy_push_state(MultiLine, yyscanner);
 306
 307 <MultiLine>{
 308     \**\*\/ R yy_pop_state(yyscanner); M N
 309     \**{LineTerminatorSequence} yylloc->end.Lines(); yyextra->last_ = true;
 310     \**{CommentCharacter}|\/ R
 311
 312     \**{UnicodeScrap} R E("invalid character");
 313     \**\* R E("invalid comment");
 314
 315     <<EOF>> R E("invalid comment")
 316 }
 317     /* }}} */
 318     /* Element {{{ */
 319 @begin E4X
 320 <RegExp>"<>"      L F(tk::LeftRight, hi::Structure);
 321 <XMLContent>"</>" L F(tk::LeftSlashRight, hi::Structure);
 322
 323 <RegExp,XMLContent>\<!\[CDATA\[(\n|[^[]|\[[^[]|\[\[[^>])*]]> V() F(tk::XMLCDATA, hi::Constant);
 324 <RegExp,XMLContent>\<!--(\n|[^-]|-[^-])*--> V() F(tk::XMLComment, hi::Comment);
 325 <RegExp,XMLContent>\<?(\n|[^?]|\?[^>])*?> V() F(tk::XMLPI, hi::Meta);
 326
 327 <XMLTag>"="  L F(tk::Equal, hi::Structure);
 328 <XMLTag>">"  L F(tk::Right, hi::Structure);
 329 <XMLTag>"/>" L F(tk::SlashRight, hi::Structure);
 330 <XMLTag>"{"  L F(tk::OpenBrace, hi::Structure);
 331
 332 <XMLTag>\"(\n|[^"])*\"|'(\n|[^'])*' V() F(tk::XMLAttributeValue, hi::Constant);
 333 <XMLTag>{XMLName} L F(tk::XMLName, hi::Identifier);
 334 <XMLTag>[ \t\r\n] V() F(tk::XMLWhitespace, hi::Nothing);
 335
 336 <XMLContent>"{"  L F(tk::OpenBrace, hi::Structure);
 337 <XMLContent>"<"  L F(tk::Left, hi::Structure);
 338 <XMLContent>"</" L F(tk::LeftSlash, hi::Structure);
 339 @end
 340     /* }}} */
 341     /* Operator {{{ */
 342 "..."  L F(tk::PeriodPeriodPeriod, hi::Meta);
 343 ".."   L E("invalid operator")
 344
 345 @begin E4X
 346 "::"   L F(tk::ColonColon, hi::Operator);
 347 ".."   L F(tk::PeriodPeriod, hi::Operator);
 348 @end
 349
 350 @begin E4X ObjectiveC
 351 "@"    L F(tk::At, hi::Operator);
 352 "#"    L F(tk::Pound, hi::Operator);
 353 @end
 354
 355 "&"    L F(tk::Ampersand, hi::Operator);
 356 "&&"   L F(tk::AmpersandAmpersand, hi::Operator);
 357 "&="   L F(tk::AmpersandEqual, hi::Operator);
 358 "^"    L F(tk::Carrot, hi::Operator);
 359 "^="   L F(tk::CarrotEqual, hi::Operator);
 360 "="    L F(tk::Equal, hi::Operator);
 361 "=="   L F(tk::EqualEqual, hi::Operator);
 362 "==="  L F(tk::EqualEqualEqual, hi::Operator);
 363 "=>"   L F(yyextra->newline_ ? tk::EqualRight_ : tk::EqualRight, hi::Operator);
 364 "!"    L F(tk::Exclamation, hi::Operator);
 365 "!="   L F(tk::ExclamationEqual, hi::Operator);
 366 "!=="  L F(tk::ExclamationEqualEqual, hi::Operator);
 367 "-"    L F(tk::Hyphen, hi::Operator);
 368 "-="   L F(tk::HyphenEqual, hi::Operator);
 369 "--"   L F(yyextra->newline_ ? tk::HyphenHyphen_ : tk::HyphenHyphen, hi::Operator);
 370 "->"   L F(tk::HyphenRight, hi::Operator);
 371 "<"    L F(tk::Left, hi::Operator);
 372 "<="   L F(tk::LeftEqual, hi::Operator);
 373 "<<"   L F(tk::LeftLeft, hi::Operator);
 374 "<<="  L F(tk::LeftLeftEqual, hi::Operator);
 375 "%"    L F(tk::Percent, hi::Operator);
 376 "%="   L F(tk::PercentEqual, hi::Operator);
 377 "."    L F(tk::Period, hi::Operator);
 378 "|"    L F(tk::Pipe, hi::Operator);
 379 "|="   L F(tk::PipeEqual, hi::Operator);
 380 "||"   L F(tk::PipePipe, hi::Operator);
 381 "+"    L F(tk::Plus, hi::Operator);
 382 "+="   L F(tk::PlusEqual, hi::Operator);
 383 "++"   L F(yyextra->newline_ ? tk::PlusPlus_ : tk::PlusPlus, hi::Operator);
 384 ">"    L F(tk::Right, hi::Operator);
 385 ">="   L F(tk::RightEqual, hi::Operator);
 386 ">>"   L F(tk::RightRight, hi::Operator);
 387 ">>="  L F(tk::RightRightEqual, hi::Operator);
 388 ">>>"  L F(tk::RightRightRight, hi::Operator);
 389 ">>>=" L F(tk::RightRightRightEqual, hi::Operator);
 390 "*"    L F(tk::Star, hi::Operator);
 391 "*="   L F(tk::StarEqual, hi::Operator);
 392 "~"    L F(tk::Tilde, hi::Operator);
 393
 394 "/"  L F(tk::Slash, hi::Operator);
 395 "/=" L F(tk::SlashEqual, hi::Operator);
 396
 397 ":"    L F(tk::Colon, hi::Structure);
 398 ","    L F(tk::Comma, hi::Structure);
 399 "?"    L F(tk::Question, hi::Structure);
 400 ";"    L F(tk::SemiColon, hi::Structure);
 401
 402 "("    L F(tk::OpenParen, hi::Structure);
 403 ")"    L F(tk::CloseParen, hi::Structure);
 404
 405 "{"    L yyextra->template_.push(false); F(yyextra->newline_ ? tk::OpenBrace_ : tk::OpenBrace, hi::Structure);
 406 <Div>"}" L S(template_); F(tk::CloseBrace, hi::Structure);
 407
 408 "["    L F(tk::OpenBracket, hi::Structure);
 409 "]"    L F(tk::CloseBracket, hi::Structure);
 410     /* }}} */
 411     /* Keyword {{{ */
 412 "@error"          L F(tk::At_error_, hi::Error);
 413
 414 @begin Java
 415 "@class"          L F(tk::At_class_, hi::Meta);
 416 @end
 417
 418 @begin C
 419 "@encode"         L F(tk::At_encode_, hi::Meta);
 420 @end
 421
 422 @begin ObjectiveC
 423 "@end"            L F(tk::At_end_, hi::Meta);
 424 "@false"          L F(tk::At_false_, hi::Constant);
 425 "@implementation" L F(tk::At_implementation_, hi::Meta);
 426 "@import"         L F(tk::At_import_, hi::Special);
 427 "@NO"             L F(tk::At_NO_, hi::Constant);
 428 "@null"           L F(tk::At_null_, hi::Constant);
 429 "@selector"       L F(tk::At_selector_, hi::Meta);
 430 "@true"           L F(tk::At_true_, hi::Constant);
 431 "@YES"            L F(tk::At_YES_, hi::Constant);
 432 @end
 433
 434 @({UnicodeStart}{UnicodePart}*{UnicodeError}?|{UnicodeError}) L E("invalid keyword")
 435     /* }}} */
 436     /* Highlight {{{ */
 437 "undefined"       L F(tk::_undefined_, hi::Operator);
 438
 439 @begin ObjectiveC
 440 "bool"            L F(tk::_bool_, hi::Type);
 441 "BOOL"            L F(tk::_BOOL_, hi::Type);
 442 "id"              L F(tk::_id_, hi::Type);
 443 "nil"             L F(tk::_nil_, hi::Constant);
 444 "NULL"            L F(tk::_NULL_, hi::Constant);
 445 "SEL"             L F(tk::_SEL_, hi::Type);
 446 @end
 447     /* }}} */
 448     /* Reserved {{{ */
 449 "abstract"        L /*FII*/ F(tk::_abstract_, hi::Meta);
 450 "await"           L /*II?*/ F(tk::_await_, hi::Meta);
 451 "boolean"         L /*FII*/ F(tk::_boolean_, hi::Type);
 452 "break"           L /*KKK*/ F(tk::_break_, hi::Control);
 453 "byte"            L /*FII*/ F(tk::_byte_, hi::Type);
 454 "case"            L /*KKK*/ F(tk::_case_, hi::Control);
 455 "catch"           L /*KKK*/ F(tk::_catch_, hi::Control);
 456 "char"            L /*FII*/ F(tk::_char_, hi::Type);
 457 "class"           L /*FFK*/ F(tk::_class_, hi::Meta);
 458 "const"           L /*FFK*/ F(tk::_const_, hi::Meta);
 459 "constructor"     L /*III*/ F(tk::_constructor_, hi::Special);
 460 "continue"        L /*KKK*/ F(tk::_continue_, hi::Control);
 461 "debugger"        L /*FKK*/ F(tk::_debugger_, hi::Meta);
 462 "default"         L /*KKK*/ F(tk::_default_, hi::Control);
 463 "delete"          L /*KKK*/ F(tk::_delete_, hi::Operator);
 464 "do"              L /*KKK*/ F(tk::_do_, hi::Control);
 465 "double"          L /*FII*/ F(tk::_double_, hi::Type);
 466 "else"            L /*KKK*/ F(tk::_else_, hi::Control);
 467 "enum"            L /*FFF*/ F(tk::_enum_, hi::Meta);
 468 "export"          L /*FFK*/ F(tk::_export_, hi::Meta);
 469 "extends"         L /*FFK*/ F(tk::_extends_, hi::Meta);
 470 "eval"            L /*III*/ F(tk::_eval_, hi::Special);
 471 "false"           L /*LLL*/ F(tk::_false_, hi::Constant);
 472 "final"           L /*FII*/ F(tk::_final_, hi::Meta);
 473 "finally"         L /*KKK*/ F(tk::_finally_, hi::Control);
 474 "float"           L /*FII*/ F(tk::_float_, hi::Type);
 475 "for"             L /*KKK*/ F(tk::_for_, hi::Control);
 476 "from"            L /*III*/ F(tk::_from_, hi::Meta);
 477 "function"        L /*KKK*/ F(tk::_function_, hi::Meta);
 478 "goto"            L /*FII*/ F(tk::_goto_, hi::Control);
 479 "get"             L /*III*/ F(tk::_get_, hi::Meta);
 480 "if"              L /*KKK*/ F(tk::_if_, hi::Control);
 481 "implements"      L /*FSS*/ F(tk::_implements_, hi::Meta);
 482 "import"          L /*FFK*/ F(tk::_import_, hi::Meta);
 483 "in"              L /*KKK*/ F(yyextra->in_.top() ? tk::_in__ : tk::_in_, hi::Operator);
 484 "Infinity"        L /*III*/ F(tk::_Infinity_, hi::Constant);
 485 "instanceof"      L /*KKK*/ F(tk::_instanceof_, hi::Operator);
 486 "int"             L /*FII*/ F(tk::_int_, hi::Type);
 487 "interface"       L /*FSS*/ F(tk::_interface_, hi::Meta);
 488 "let"             L /*IS?*/ F(tk::_let_, hi::Meta);
 489 "long"            L /*FII*/ F(tk::_long_, hi::Type);
 490 "native"          L /*FII*/ F(tk::_native_, hi::Meta);
 491 "new"             L /*KKK*/ F(tk::_new_, hi::Operator);
 492 "null"            L /*LLL*/ F(tk::_null_, hi::Constant);
 493 "package"         L /*FSS*/ F(tk::_package_, hi::Meta);
 494 "private"         L /*FSS*/ F(tk::_private_, hi::Meta);
 495 "protected"       L /*FSS*/ F(tk::_protected_, hi::Meta);
 496 "prototype"       L /*III*/ F(tk::_prototype_, hi::Special);
 497 "public"          L /*FSS*/ F(tk::_public_, hi::Meta);
 498 "return"          L /*KKK*/ F(yyextra->return_.top() ? tk::_return__ : tk::_return_, hi::Control);
 499 "set"             L /*III*/ F(tk::_set_, hi::Meta);
 500 "short"           L /*FII*/ F(tk::_short_, hi::Type);
 501 "static"          L /*FS?*/ F(tk::_static_, hi::Meta);
 502 "super"           L /*FFK*/ F(yyextra->super_.top() ? tk::_super__ : tk::_super_, hi::Constant);
 503 "switch"          L /*KKK*/ F(tk::_switch_, hi::Control);
 504 "synchronized"    L /*FII*/ F(tk::_synchronized_, hi::Meta);
 505 "this"            L /*KKK*/ F(tk::_this_, hi::Constant);
 506 "throw"           L /*KKK*/ F(tk::_throw_, hi::Control);
 507 "throws"          L /*FII*/ F(tk::_throws_, hi::Meta);
 508 "transient"       L /*FII*/ F(tk::_transient_, hi::Meta);
 509 "true"            L /*LLL*/ F(tk::_true_, hi::Constant);
 510 "try"             L /*KKK*/ F(tk::_try_, hi::Control);
 511 "typeof"          L /*KKK*/ F(tk::_typeof_, hi::Operator);
 512 "var"             L /*KKK*/ F(tk::_var_, hi::Meta);
 513 "void"            L /*KKK*/ F(tk::_void_, hi::Operator);
 514 "volatile"        L /*FII*/ F(tk::_volatile_, hi::Meta);
 515 "while"           L /*KKK*/ F(tk::_while_, hi::Control);
 516 "with"            L /*KKK*/ F(tk::_with_, hi::Control);
 517 "yield"           L /*IS?*/ F(yyextra->yield_.top() ? tk::_yield__ : tk::_yield_, hi::Control);
 518
 519 "auto"            L F(tk::_auto_, hi::Meta);
 520 "each"            L F(tk::_each_, hi::Control);
 521 "of"              L F(tk::_of_, hi::Operator);
 522
 523 @begin C
 524 "extern"          L F(tk::_extern_, hi::Type);
 525 "signed"          L F(tk::_signed_, hi::Type);
 526 "typedef"         L F(tk::_typedef_, hi::Meta);
 527 "unsigned"        L F(tk::_unsigned_, hi::Type);
 528 @end
 529
 530 @begin ObjectiveC
 531 "NO"              L F(tk::_NO_, hi::Constant);
 532 "YES"             L F(tk::_YES_, hi::Constant);
 533 @end
 534
 535 @begin E4X
 536 "namespace"       L F(tk::_namespace_, hi::Meta);
 537 "xml"             L F(tk::_xml_, hi::Meta);
 538 @end
 539     /* }}} */
 540     /* Identifier {{{ */
 541 {UnicodeStart}{UnicodePart}* L I(identifier, Identifier(Y), tk::Identifier_, hi::Identifier);
 542
 543 {IdentifierStart}{IdentifierPart}* L {
 544     char *value(A char[yyleng + 1]);
 545     char *local(value);
 546
 547     for (yy_size_t i(0), e(yyleng); i != e; ++i) {
 548         char next(yytext[i]);
 549         if (next != '\\')
 550             *local++ = next;
 551         else
 552             U(local, yytext, ++i);
 553     }
 554
 555     *local = '\0';
 556     I(identifier, Identifier(value), tk::Identifier_, hi::Identifier);
 557 }
 558
 559 ({IdentifierStart}{IdentifierPart}*)?{IdentifierFail} L E("invalid identifier")
 560     /* }}} */
 561     /* Number {{{ */
 562 0[0-7]+ L I(number, Number(strtoull(yytext + 1, NULL, 8)), tk::NumericLiteral, hi::Constant);
 563 0[0-9]+ L I(number, Number(strtoull(yytext + 1, NULL, 10)), tk::NumericLiteral, hi::Constant);
 564
 565 0[xX][0-9a-fA-F]+ L I(number, Number(strtoull(yytext + 2, NULL, 16)), tk::NumericLiteral, hi::Constant);
 566 0[oO][0-7]+ L I(number, Number(strtoull(yytext + 2, NULL, 8)), tk::NumericLiteral, hi::Constant);
 567 0[bB][0-1]+ L I(number, Number(strtoull(yytext + 2, NULL, 2)), tk::NumericLiteral, hi::Constant);
 568
 569 (\.[0-9]+|(0|[1-9][0-9]*)(\.[0-9]*)?)([eE][+-]?[0-9]+)? L I(number, Number(strtod(yytext, NULL)), tk::NumericLiteral, hi::Constant);
 570 (\.[0-9]+|(0|[1-9][0-9]*)(\.[0-9]*)?)[eE][+-]?{IdentifierScrap} L E("invalid exponent")
 571 (\.?[0-9]|(0|[1-9][0-9]*)\.){IdentifierScrap} L E("invalid number")
 572     /* }}} */
 573     /* String {{{ */
 574 \' L CYLexBufferStart(LegacySingleString);
 575 <LegacySingleString,StrictSingleString>{
 576     \' R CYLexBufferEnd(string, String, tk::StringLiteral, hi::Constant);
 577     {SingleCharacter}+ R CYLexBufferUnits(yytext, yyleng);
 578     {SingleCharacter}*{LineTerminatorSequence} R E("invalid newline");
 579     {SingleCharacter}*{UnicodeScrap} R E("invalid character");
 580 }
 581
 582 \" L CYLexBufferStart(LegacyDoubleString);
 583 <LegacyDoubleString,StrictDoubleString>{
 584     \" R CYLexBufferEnd(string, String, tk::StringLiteral, hi::Constant);
 585     {DoubleCharacter}+ R CYLexBufferUnits(yytext, yyleng);
 586     {DoubleCharacter}*{LineTerminatorSequence} R E("invalid newline");
 587     {DoubleCharacter}*{UnicodeScrap} R E("invalid character");
 588 }
 589     /* }}} */
 590     /* Template {{{ */
 591 "`" L yyextra->tail_ = false; CYLexBufferStart(StrictAccentString);
 592 <DivOrTemplateTail>"}" L yyextra->tail_ = true; S(template_); CYLexBufferStart(StrictAccentString);
 593
 594 <StrictAccentString>{
 595     "`" R CYLexBufferEnd(string, String, yyextra->tail_ ? tk::TemplateTail : tk::NoSubstitutionTemplate, hi::Constant);
 596     "${" R yyextra->template_.push(true); CYLexBufferEnd(string, String, yyextra->tail_ ? tk::TemplateMiddle : tk::TemplateHead, hi::Constant);
 597
 598     "$" R CYLexBufferUnit('$');
 599
 600     {PlateCharacter}+ R CYLexBufferUnits(yytext, yyleng);
 601     {PlateCharacter}*{LineTerminatorSequence} R E("invalid newline");
 602     {PlateCharacter}*{UnicodeScrap} R E("invalid character");
 603 }
 604     /* }}} */
 605     /* Escapes {{{ */
 606 <LegacySingleString,LegacyDoubleString>{
 607     \\[0-3][0-7][0-7] R CYLexBufferPoint(X(yytext[1]) << 6 | X(yytext[2]) << 3 | X(yytext[3]));
 608     \\[0-7][0-7] R CYLexBufferUnit(X(yytext[1]) << 3 | X(yytext[2]));
 609     \\[0-7] R CYLexBufferUnit(X(yytext[1]));
 610 }
 611
 612 <StrictSingleString,StrictDoubleString,StrictAccentString>{
 613     \\0[0-7] R E("legacy escape");
 614     \\0 R CYLexBufferUnit('\0');
 615 }
 616
 617 <LegacySingleString,LegacyDoubleString,StrictSingleString,StrictDoubleString,StrictAccentString>{
 618     \\b R CYLexBufferUnit('\b');
 619     \\f R CYLexBufferUnit('\f');
 620     \\n R CYLexBufferUnit('\n');
 621     \\r R CYLexBufferUnit('\r');
 622     \\t R CYLexBufferUnit('\t');
 623     \\v R CYLexBufferUnit('\v');
 624
 625     \\x{HexDigit}{2} R CYLexBufferPoint(X(yytext[2]) << 4 | X(yytext[3]));
 626
 627     \\u{HexDigit}{4} R CYLexBufferPoint(X(yytext[2]) << 12 | X(yytext[3]) << 8 | X(yytext[4]) << 4 | X(yytext[5]));
 628
 629     \\u\{{HexDigit}+\} R {
 630         unsigned point(0);
 631         for (yy_size_t i(3); i != yyleng - 1; ++i)
 632             point = point << 4 | X(yytext[i]);
 633         CYLexBufferPoint(point);
 634     }
 635
 636     \\{LineTerminatorSequence} yylloc->end.Lines();
 637     \\{NoneTerminatorCharacter} R CYLexBufferUnits(yytext + 1, yyleng - 1);
 638     \\{UnicodeScrap} R E("invalid character");
 639
 640     \\(x{HexDigit}{0,1}|u({HexDigit}{0,3}|\{{HexDigit}*))? R E("invalid escape");
 641     <<EOF>> R E("invalid string");
 642 }
 643     /* }}} */
 644
 645 {LineTerminatorSequence} yylloc->step(); yylloc->end.Lines(); yyextra->last_ = true; N
 646 {WhiteSpace} L
 647 {U1}|{UnicodeScrap} L E("invalid character");
 648
 649 <<EOF>> if (yyextra->auto_) { yyextra->auto_ = false; F(tk::AutoComplete, hi::Nothing); } L yyterminate();
 650
 651 %%
 652
 653 #undef yyextra
 654 #define yyextra this
 655 #define yyscanner scanner_
 656
 657 void CYDriver::ScannerInit() {
 658     cylex_init(&scanner_);
 659     cyset_extra(this, scanner_);
 660 }
 661
 662 void CYDriver::ScannerDestroy() {
 663     cylex_destroy(scanner_);
 664 }
 665
 666 void CYDriver::SetRegEx(bool equal) {
 667     CYLexBufferStart(RegularExpression);
 668     CYLexBufferUnit('/');
 669     if (equal)
 670         CYLexBufferUnit('=');
 671 }
 672
 673 void CYDriver::SetCondition(Condition condition) {
 674     struct yyguts_t *yyg(reinterpret_cast<struct yyguts_t *>(scanner_));
 675
 676     switch (condition) {
 677 @begin E4X
 678         case XMLContentCondition:
 679             BEGIN(XMLContent);
 680             break;
 681         case XMLTagCondition:
 682             BEGIN(XMLTag);
 683             break;
 684 @end
 685         default:
 686             _assert(false);
 687     }
 688 }
 689
 690 void CYDriver::PushCondition(Condition condition) {
 691     switch (condition) {
 692 @begin E4X
 693         case XMLContentCondition:
 694             yy_push_state(XMLContent, scanner_);
 695             break;
 696         case XMLTagCondition:
 697             yy_push_state(XMLTag, scanner_);
 698             break;
 699 @end
 700         default:
 701             _assert(false);
 702     }
 703 }
 704
 705 void CYDriver::PopCondition() {
 706     yy_pop_state(scanner_);
 707 }
 708
 709 bool CYLexerHighlight(hi::Value &highlight, CYLocation &location, void *scanner) {
 710     YYSTYPE value;
 711     if (cylex(&value, &location, scanner) == 0)
 712         return false;
 713     highlight = value.highlight_;
 714     return true;
 715 }
 716
 717 #if defined(__clang__)
 718 #pragma clang diagnostic pop
 719 #else
 720 // must not pop -Wunused-function
 721 //#pragma GCC diagnostic pop
 722 #endif