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 #include "IdentifierStart.h"
  45 #include "IdentifierContinue.h"
  46
  47 #define YY_EXTRA_TYPE CYDriver *
  48
  49 #define F(value, highlight) do { \
  50     yyextra->newline_ = yyextra->last_; \
  51     yyextra->last_ = false; \
  52     yyextra->next_ = false; \
  53     BEGIN(yyextra->template_.top() ? DivOrTemplateTail : Div); \
  54     yylval->highlight_ = highlight; \
  55     return value; \
  56 } while (false)
  57
  58 #define S(stack) do { \
  59     if (yyextra->stack.size() == 1) \
  60         E("invalid brace") \
  61     yyextra->stack.pop(); \
  62 } while (false)
  63
  64 #define P yyextra->pool_
  65 #define A new(P)
  66 #define Y P.strmemdup(yytext, yyleng)
  67
  68 #define I(type, Type, value, highlight) do { \
  69     yylval->semantic_.type ## _ = A CY ## Type; \
  70     yylval->semantic_.type ## _->location_ = *yylloc; \
  71     F(value, highlight); \
  72 } while (false)
  73
  74 #define N \
  75     if (yyextra->last_ && yyextra->next_) { \
  76         yyextra->last_ = false; \
  77         F(tk::NewLine, hi::Nothing); \
  78     }
  79
  80 #define V(more) { \
  81     if (const char *nl = reinterpret_cast<const char *>(memchr(yytext, '\n', yyleng))) { \
  82         unsigned lines(0); \
  83         size_t left; \
  84         do { \
  85             ++lines; \
  86             left = yyleng - (nl - yytext) - 1; \
  87             nl = reinterpret_cast<const char *>(memchr(nl + 1, '\n', left)); \
  88         } while (nl != NULL); \
  89         yylloc->step(); \
  90         yylloc->end.Lines(lines); \
  91         yylloc->end.Columns(left); \
  92         more \
  93     } else L \
  94 }
  95
  96 #define R yylloc->end.Columns(yyleng);
  97 #define L yylloc->step(); R
  98
  99 #define H(value, highlight) do { \
 100     if (yyextra->highlight_) \
 101         F(value, highlight); \
 102 } while (false)
 103
 104 #define M \
 105     H(tk::Comment, hi::Comment);
 106
 107 #define E(message) { \
 108     CYDriver::Error error; \
 109     error.location_ = *yylloc; \
 110     error.message_ = "syntax error, " message; \
 111     yyextra->errors_.push_back(error); \
 112     yyterminate(); \
 113 }
 114
 115 int X(char c) {
 116     if (c >= '0' && c <= '9')
 117         return c - '0';
 118     if (c >= 'a' && c <= 'f')
 119         return c - 'a' + 10;
 120     if (c >= 'A' && c <= 'F')
 121         return c - 'A' + 10;
 122     return -1;
 123 }
 124
 125 template <typename Type_>
 126 static void U(Type_ &local, unsigned point) {
 127     if (false) {
 128     } else if (point < 0x000080) {
 129         *local++ = point;
 130     } else if (point < 0x000800) {
 131         *local++ = 0xc0 | point >> 0x06 & 0x1f;
 132         goto one;
 133     } else if (point < 0x010000) {
 134         *local++ = 0xe0 | point >> 0x0c & 0x0f;
 135         goto two;
 136     } else if (point < 0x110000) {
 137         *local++ = 0xf0 | point >> 0x12 & 0x07;
 138         *local++ = 0x80 | point >> 0x0c & 0x3f;
 139       two:
 140         *local++ = 0x80 | point >> 0x06 & 0x3f;
 141       one:
 142         *local++ = 0x80 | point >> 0x00 & 0x3f;
 143     } else _assert(false);
 144 }
 145
 146 static unsigned U(char *&local, const char *text, yy_size_t &i) {
 147     unsigned point;
 148
 149     char next(text[++i]);
 150     if (next != '{') {
 151         point = X(text[i + 0]) << 12 | X(text[i + 1]) << 8 | X(text[i + 2]) << 4 | X(text[i + 3]);
 152         i += 3;
 153     } else {
 154         point = 0;
 155         for (;;) {
 156             next = text[++i];
 157             if (next == '}')
 158                 break;
 159             point = (point << 4) | X(next);
 160         }
 161     }
 162
 163     U(local, point);
 164     return point;
 165 }
 166
 167 #define CYLexBufferPoint(point) do { \
 168     std::back_insert_iterator<std::vector<char> > inserter(yyextra->buffer_); \
 169     U(inserter, point); \
 170 } while (false)
 171
 172 #define CYLexBufferUnit(value) do { \
 173     yyextra->buffer_.push_back(value); \
 174 } while (false)
 175
 176 #define CYLexBufferUnits(data, size) do { \
 177     yyextra->buffer_.insert(yyextra->buffer_.end(), data, data + size); \
 178 } while (false)
 179
 180 #define CYLexBufferStart(condition) do { \
 181     yyextra->buffer_.clear(); \
 182     yy_push_state(condition, yyscanner); \
 183 } while (false)
 184
 185 #define CYLexBufferEnd(type, Type, value, highlight) do { \
 186     yy_pop_state(yyscanner); \
 187     I(type, Type(P.strmemdup(yyextra->buffer_.data(), yyextra->buffer_.size()), yyextra->buffer_.size()), value, highlight); \
 188 } while (false)
 189
 190 #define YY_INPUT(data, value, size) { \
 191     if (yyextra->data_.eof()) \
 192         value = YY_NULL; \
 193     else { \
 194         yyextra->data_.read(data, size); \
 195         size_t copy(yyextra->data_.gcount()); \
 196         value = copy == 0 ? YY_NULL : copy; \
 197     } \
 198 }
 199
 200 %}
 201
 202 %option prefix="cy"
 203 %option bison-bridge
 204 %option bison-locations
 205 %option nodefault
 206 %option noyywrap
 207 %option noyylineno
 208 %option nounput
 209 %option nounistd
 210 %option 8bit
 211 %option backup
 212 %option batch
 213 %option never-interactive
 214 %option pointer
 215 %option reentrant
 216 %option stack
 217
 218 U1 [\x00-\x7f]
 219 U0 [\x80-\xbf]
 220 U2 [\xc2-\xdf]
 221 U3 [\xe0-\xef]
 222 U4 [\xf0-\xf4]
 223 UN [\xc0-\xc1\xf5-\xff]
 224 UE {U1}|{U2}|{U3}|{U4}|{UN}
 225
 226 HexDigit [0-9a-fA-F]
 227 LineTerminatorSequence \r?\n|\r|\xe2\x80[\xa8\xa9]
 228 WhiteSpace [\x09\x0b\x0c\x20]|\xc2\xa0|\xef\xbb\xbf
 229 UnicodeEscape \\u({HexDigit}{4}|\{{HexDigit}+\})
 230
 231 @include NotLineTerminator.l
 232 NoneTerminatorCharacter [^\r\n\x80-\xff]|{NotLineTerminator}
 233 RegExCharacter [^/[\\]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 234 RegClsCharacter [^]\\]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 235 CommentCharacter [^*/]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 236 SingleCharacter [^'\\]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 237 DoubleCharacter [^"\\]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 238 PlateCharacter [^$`\\]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 239
 240 @include UnicodeIDStart.l
 241 @include UnicodeIDContinue.l
 242 IdentifierMore [$_]
 243
 244 UnicodeStart {IdentifierMore}|{UnicodeIDStart}
 245 UnicodePart {IdentifierMore}|\xe2\x80[\x8c\x8d]|{UnicodeIDContinue}
 246 UnicodeScrap {U2}|{U3}{U0}{0,1}|{U4}{U0}{0,2}|{UN}|{U0}
 247 UnicodeError ({U2}|{U3}{U0}{0,1}|{U4}{U0}{0,2}){UE}|{UN}|{U0}
 248
 249 IdentifierStart {UnicodeStart}|{UnicodeEscape}
 250 IdentifierPart {UnicodePart}|{UnicodeEscape}
 251 IdentifierFail {UnicodeError}|\\(u({HexDigit}{0,3}|\{{HexDigit}*))?
 252 IdentifierScrap {IdentifierPart}*{IdentifierFail}?
 253
 254 RegularExpressionBackslashSequence \\{NoneTerminatorCharacter}
 255 RegularExpressionClassChars ({RegClsCharacter}|{RegularExpressionBackslashSequence})*
 256
 257 @begin E4X
 258 XMLNameStart [a-zA-Z_:]
 259 XMLNamePart [a-zA-Z0-9.-_:]
 260 XMLName {XMLNameStart}{XMLNamePart}*
 261 @end
 262
 263 %x RegularExpression
 264 %x MultiLine
 265
 266 %x LegacySingleString
 267 %x LegacyDoubleString
 268
 269 %x StrictSingleString
 270 %x StrictDoubleString
 271 %x StrictAccentString
 272
 273 %s Div
 274 %s DivOrTemplateTail
 275
 276 @begin E4X
 277 %x XMLContent
 278 %x XMLTag
 279 @end
 280
 281 %%
 282
 283     /* RegEx {{{ */
 284 <RegularExpression>{
 285     \/{UnicodePart}* R CYLexBufferUnits(yytext, yyleng); CYLexBufferEnd(literal, RegEx, tk::RegularExpressionLiteral, hi::Constant);
 286     \/{UnicodePart}*{UnicodeError} R E("invalid character");
 287
 288     {RegExCharacter}+ R CYLexBufferUnits(yytext, yyleng);
 289
 290     {RegularExpressionBackslashSequence} R CYLexBufferUnits(yytext, yyleng);
 291     \\ R E("invalid escape")
 292
 293     (\\|{RegExCharacter}+)?{LineTerminatorSequence} R E("invalid newline");
 294     (\\|{RegExCharacter}+)?{UnicodeScrap} R E("invalid character");
 295
 296     "["{RegularExpressionClassChars}"]" R CYLexBufferUnits(yytext, yyleng);
 297     "["{RegularExpressionClassChars}\\? R E("invalid class");
 298
 299     "["{RegularExpressionClassChars}\\?{LineTerminatorSequence} R E("invalid newline");
 300     "["{RegularExpressionClassChars}\\?{UnicodeScrap} R E("invalid character");
 301
 302     <<EOF>> R E("unterminated regex")
 303 }
 304     /* }}} */
 305     /* Comment {{{ */
 306     /* XXX: maybe fold LineTerminatorSequence into these definitions */
 307 #!{NoneTerminatorCharacter}* L M
 308 \/\/{NoneTerminatorCharacter}* L M
 309 (#!|\/\/){NoneTerminatorCharacter}*{UnicodeError} L E("invalid character");
 310
 311 \/\* L yy_push_state(MultiLine, yyscanner);
 312
 313 <MultiLine>{
 314     \**\*\/ R yy_pop_state(yyscanner); M N
 315     \**{LineTerminatorSequence} yylloc->end.Lines(); yyextra->last_ = true;
 316     \**{CommentCharacter}|\/ R
 317
 318     \**{UnicodeScrap} R E("invalid character");
 319     \**\* R E("invalid comment");
 320
 321     <<EOF>> R E("invalid comment")
 322 }
 323     /* }}} */
 324     /* Element {{{ */
 325 @begin E4X
 326 <RegExp>"<>"      L F(tk::LeftRight, hi::Structure);
 327 <XMLContent>"</>" L F(tk::LeftSlashRight, hi::Structure);
 328
 329 <RegExp,XMLContent>\<!\[CDATA\[(\n|[^[]|\[[^[]|\[\[[^>])*]]> V() F(tk::XMLCDATA, hi::Constant);
 330 <RegExp,XMLContent>\<!--(\n|[^-]|-[^-])*--> V() F(tk::XMLComment, hi::Comment);
 331 <RegExp,XMLContent>\<?(\n|[^?]|\?[^>])*?> V() F(tk::XMLPI, hi::Meta);
 332
 333 <XMLTag>"="  L F(tk::Equal, hi::Structure);
 334 <XMLTag>">"  L F(tk::Right, hi::Structure);
 335 <XMLTag>"/>" L F(tk::SlashRight, hi::Structure);
 336 <XMLTag>"{"  L F(tk::OpenBrace, hi::Structure);
 337
 338 <XMLTag>\"(\n|[^"])*\"|'(\n|[^'])*' V() F(tk::XMLAttributeValue, hi::Constant);
 339 <XMLTag>{XMLName} L F(tk::XMLName, hi::Identifier);
 340 <XMLTag>[ \t\r\n] V() F(tk::XMLWhitespace, hi::Nothing);
 341
 342 <XMLContent>"{"  L F(tk::OpenBrace, hi::Structure);
 343 <XMLContent>"<"  L F(tk::Left, hi::Structure);
 344 <XMLContent>"</" L F(tk::LeftSlash, hi::Structure);
 345 @end
 346     /* }}} */
 347     /* Operator {{{ */
 348 "..."  L F(tk::PeriodPeriodPeriod, hi::Meta);
 349 ".."   L E("invalid operator")
 350
 351 @begin E4X
 352 "::"   L F(tk::ColonColon, hi::Operator);
 353 ".."   L F(tk::PeriodPeriod, hi::Operator);
 354 @end
 355
 356 @begin E4X ObjectiveC
 357 "@"    L F(tk::At, hi::Operator);
 358 "#"    L F(tk::Pound, hi::Operator);
 359 @end
 360
 361 "&"    L F(tk::Ampersand, hi::Operator);
 362 "&&"   L F(tk::AmpersandAmpersand, hi::Operator);
 363 "&="   L F(tk::AmpersandEqual, hi::Operator);
 364 "^"    L F(tk::Carrot, hi::Operator);
 365 "^="   L F(tk::CarrotEqual, hi::Operator);
 366 "="    L F(tk::Equal, hi::Operator);
 367 "=="   L F(tk::EqualEqual, hi::Operator);
 368 "==="  L F(tk::EqualEqualEqual, hi::Operator);
 369 "=>"   L F(yyextra->newline_ ? tk::EqualRight_ : tk::EqualRight, hi::Operator);
 370 "!"    L F(tk::Exclamation, hi::Operator);
 371 "!="   L F(tk::ExclamationEqual, hi::Operator);
 372 "!=="  L F(tk::ExclamationEqualEqual, hi::Operator);
 373 "-"    L F(tk::Hyphen, hi::Operator);
 374 "-="   L F(tk::HyphenEqual, hi::Operator);
 375 "--"   L F(yyextra->newline_ ? tk::HyphenHyphen_ : tk::HyphenHyphen, hi::Operator);
 376 "->"   L F(tk::HyphenRight, hi::Operator);
 377 "<"    L F(tk::Left, hi::Operator);
 378 "<="   L F(tk::LeftEqual, hi::Operator);
 379 "<<"   L F(tk::LeftLeft, hi::Operator);
 380 "<<="  L F(tk::LeftLeftEqual, hi::Operator);
 381 "%"    L F(tk::Percent, hi::Operator);
 382 "%="   L F(tk::PercentEqual, hi::Operator);
 383 "."    L F(tk::Period, hi::Operator);
 384 "|"    L F(tk::Pipe, hi::Operator);
 385 "|="   L F(tk::PipeEqual, hi::Operator);
 386 "||"   L F(tk::PipePipe, hi::Operator);
 387 "+"    L F(tk::Plus, hi::Operator);
 388 "+="   L F(tk::PlusEqual, hi::Operator);
 389 "++"   L F(yyextra->newline_ ? tk::PlusPlus_ : tk::PlusPlus, hi::Operator);
 390 ">"    L F(tk::Right, hi::Operator);
 391 ">="   L F(tk::RightEqual, hi::Operator);
 392 ">>"   L F(tk::RightRight, hi::Operator);
 393 ">>="  L F(tk::RightRightEqual, hi::Operator);
 394 ">>>"  L F(tk::RightRightRight, hi::Operator);
 395 ">>>=" L F(tk::RightRightRightEqual, hi::Operator);
 396 "*"    L F(tk::Star, hi::Operator);
 397 "*="   L F(tk::StarEqual, hi::Operator);
 398 "~"    L F(tk::Tilde, hi::Operator);
 399
 400 "/"  L F(tk::Slash, hi::Operator);
 401 "/=" L F(tk::SlashEqual, hi::Operator);
 402
 403 ":"    L F(tk::Colon, hi::Structure);
 404 ","    L F(tk::Comma, hi::Structure);
 405 "?"    L F(tk::Question, hi::Structure);
 406 ";"    L F(tk::SemiColon, hi::Structure);
 407
 408 "("    L F(tk::OpenParen, hi::Structure);
 409 ")"    L F(tk::CloseParen, hi::Structure);
 410
 411 "{"    L yyextra->template_.push(false); F(yyextra->newline_ ? tk::OpenBrace_ : tk::OpenBrace, hi::Structure);
 412 <Div>"}" L S(template_); F(tk::CloseBrace, hi::Structure);
 413
 414 "["    L F(tk::OpenBracket, hi::Structure);
 415 "]"    L F(tk::CloseBracket, hi::Structure);
 416     /* }}} */
 417     /* Keyword {{{ */
 418 "@error"          L F(tk::At_error_, hi::Error);
 419
 420 @begin Java
 421 "@class"          L F(tk::At_class_, hi::Meta);
 422 @end
 423
 424 @begin C
 425 "@encode"         L F(tk::At_encode_, hi::Meta);
 426 @end
 427
 428 @begin ObjectiveC
 429 "@end"            L F(tk::At_end_, hi::Meta);
 430 "@false"          L F(tk::At_false_, hi::Constant);
 431 "@implementation" L F(tk::At_implementation_, hi::Meta);
 432 "@import"         L F(tk::At_import_, hi::Special);
 433 "@NO"             L F(tk::At_NO_, hi::Constant);
 434 "@null"           L F(tk::At_null_, hi::Constant);
 435 "@selector"       L F(tk::At_selector_, hi::Meta);
 436 "@true"           L F(tk::At_true_, hi::Constant);
 437 "@YES"            L F(tk::At_YES_, hi::Constant);
 438 @end
 439
 440 @({UnicodeStart}{UnicodePart}*{UnicodeError}?|{UnicodeError}) L E("invalid keyword")
 441     /* }}} */
 442     /* Highlight {{{ */
 443 "undefined"       L F(tk::_undefined_, hi::Operator);
 444
 445 @begin ObjectiveC
 446 "bool"            L F(tk::_bool_, hi::Type);
 447 "BOOL"            L F(tk::_BOOL_, hi::Type);
 448 "id"              L F(tk::_id_, hi::Type);
 449 "nil"             L F(tk::_nil_, hi::Constant);
 450 "NULL"            L F(tk::_NULL_, hi::Constant);
 451 "SEL"             L F(tk::_SEL_, hi::Type);
 452 @end
 453     /* }}} */
 454     /* Reserved {{{ */
 455 "abstract"        L /*FII*/ F(tk::_abstract_, hi::Meta);
 456 "await"           L /*II?*/ F(tk::_await_, hi::Meta);
 457 "boolean"         L /*FII*/ F(tk::_boolean_, hi::Type);
 458 "break"           L /*KKK*/ F(tk::_break_, hi::Control);
 459 "byte"            L /*FII*/ F(tk::_byte_, hi::Type);
 460 "case"            L /*KKK*/ F(tk::_case_, hi::Control);
 461 "catch"           L /*KKK*/ F(tk::_catch_, hi::Control);
 462 "char"            L /*FII*/ F(tk::_char_, hi::Type);
 463 "class"           L /*FFK*/ F(tk::_class_, hi::Meta);
 464 "const"           L /*FFK*/ F(tk::_const_, hi::Meta);
 465 "constructor"     L /*III*/ F(tk::_constructor_, hi::Special);
 466 "continue"        L /*KKK*/ F(tk::_continue_, hi::Control);
 467 "debugger"        L /*FKK*/ F(tk::_debugger_, hi::Meta);
 468 "default"         L /*KKK*/ F(tk::_default_, hi::Control);
 469 "delete"          L /*KKK*/ F(tk::_delete_, hi::Operator);
 470 "do"              L /*KKK*/ F(tk::_do_, hi::Control);
 471 "double"          L /*FII*/ F(tk::_double_, hi::Type);
 472 "else"            L /*KKK*/ F(tk::_else_, hi::Control);
 473 "enum"            L /*FFF*/ F(tk::_enum_, hi::Meta);
 474 "export"          L /*FFK*/ F(tk::_export_, hi::Meta);
 475 "extends"         L /*FFK*/ F(tk::_extends_, hi::Meta);
 476 "eval"            L /*III*/ F(tk::_eval_, hi::Special);
 477 "false"           L /*LLL*/ F(tk::_false_, hi::Constant);
 478 "final"           L /*FII*/ F(tk::_final_, hi::Meta);
 479 "finally"         L /*KKK*/ F(tk::_finally_, hi::Control);
 480 "float"           L /*FII*/ F(tk::_float_, hi::Type);
 481 "for"             L /*KKK*/ F(tk::_for_, hi::Control);
 482 "from"            L /*III*/ F(tk::_from_, hi::Meta);
 483 "function"        L /*KKK*/ F(tk::_function_, hi::Meta);
 484 "goto"            L /*FII*/ F(tk::_goto_, hi::Control);
 485 "get"             L /*III*/ F(tk::_get_, hi::Meta);
 486 "if"              L /*KKK*/ F(tk::_if_, hi::Control);
 487 "implements"      L /*FSS*/ F(tk::_implements_, hi::Meta);
 488 "import"          L /*FFK*/ F(tk::_import_, hi::Meta);
 489 "in"              L /*KKK*/ F(yyextra->in_.top() ? tk::_in__ : tk::_in_, hi::Operator);
 490 "Infinity"        L /*III*/ F(tk::_Infinity_, hi::Constant);
 491 "instanceof"      L /*KKK*/ F(tk::_instanceof_, hi::Operator);
 492 "int"             L /*FII*/ F(tk::_int_, hi::Type);
 493 "interface"       L /*FSS*/ F(tk::_interface_, hi::Meta);
 494 "let"             L /*IS?*/ F(tk::_let_, hi::Meta);
 495 "long"            L /*FII*/ F(tk::_long_, hi::Type);
 496 "native"          L /*FII*/ F(tk::_native_, hi::Meta);
 497 "new"             L /*KKK*/ F(tk::_new_, hi::Operator);
 498 "null"            L /*LLL*/ F(tk::_null_, hi::Constant);
 499 "package"         L /*FSS*/ F(tk::_package_, hi::Meta);
 500 "private"         L /*FSS*/ F(tk::_private_, hi::Meta);
 501 "protected"       L /*FSS*/ F(tk::_protected_, hi::Meta);
 502 "prototype"       L /*III*/ F(tk::_prototype_, hi::Special);
 503 "public"          L /*FSS*/ F(tk::_public_, hi::Meta);
 504 "return"          L /*KKK*/ F(yyextra->return_.top() ? tk::_return__ : tk::_return_, hi::Control);
 505 "set"             L /*III*/ F(tk::_set_, hi::Meta);
 506 "short"           L /*FII*/ F(tk::_short_, hi::Type);
 507 "static"          L /*FS?*/ F(tk::_static_, hi::Meta);
 508 "super"           L /*FFK*/ F(yyextra->super_.top() ? tk::_super__ : tk::_super_, hi::Constant);
 509 "switch"          L /*KKK*/ F(tk::_switch_, hi::Control);
 510 "synchronized"    L /*FII*/ F(tk::_synchronized_, hi::Meta);
 511 "this"            L /*KKK*/ F(tk::_this_, hi::Constant);
 512 "throw"           L /*KKK*/ F(tk::_throw_, hi::Control);
 513 "throws"          L /*FII*/ F(tk::_throws_, hi::Meta);
 514 "transient"       L /*FII*/ F(tk::_transient_, hi::Meta);
 515 "true"            L /*LLL*/ F(tk::_true_, hi::Constant);
 516 "try"             L /*KKK*/ F(tk::_try_, hi::Control);
 517 "typeof"          L /*KKK*/ F(tk::_typeof_, hi::Operator);
 518 "var"             L /*KKK*/ F(tk::_var_, hi::Meta);
 519 "void"            L /*KKK*/ F(tk::_void_, hi::Operator);
 520 "volatile"        L /*FII*/ F(tk::_volatile_, hi::Meta);
 521 "while"           L /*KKK*/ F(tk::_while_, hi::Control);
 522 "with"            L /*KKK*/ F(tk::_with_, hi::Control);
 523 "yield"           L /*IS?*/ F(yyextra->yield_.top() ? tk::_yield__ : tk::_yield_, hi::Control);
 524
 525 "auto"            L F(tk::_auto_, hi::Meta);
 526 "each"            L F(tk::_each_, hi::Control);
 527 "of"              L F(tk::_of_, hi::Operator);
 528
 529 @begin C
 530 "extern"          L F(tk::_extern_, hi::Type);
 531 "signed"          L F(tk::_signed_, hi::Type);
 532 "typedef"         L F(tk::_typedef_, hi::Meta);
 533 "unsigned"        L F(tk::_unsigned_, hi::Type);
 534 @end
 535
 536 @begin ObjectiveC
 537 "NO"              L F(tk::_NO_, hi::Constant);
 538 "YES"             L F(tk::_YES_, hi::Constant);
 539 @end
 540
 541 @begin E4X
 542 "namespace"       L F(tk::_namespace_, hi::Meta);
 543 "xml"             L F(tk::_xml_, hi::Meta);
 544 @end
 545     /* }}} */
 546     /* Identifier {{{ */
 547 {UnicodeStart}{UnicodePart}* L I(identifier, Identifier(Y), tk::Identifier_, hi::Identifier);
 548
 549 {IdentifierStart}{IdentifierPart}* L {
 550     char *value(A char[yyleng + 1]);
 551     char *local(value);
 552
 553     for (yy_size_t i(0), e(yyleng); i != e; ++i) {
 554         char next(yytext[i]);
 555         if (next != '\\')
 556             *local++ = next;
 557         else {
 558             bool (*is)(unsigned) = (i == 0 ? &IsIdentifierStart : &IsIdentifierContinue);
 559             unsigned point(U(local, yytext, ++i));
 560             if (!is(point))
 561                 E("invalid character");
 562         }
 563     }
 564
 565     *local = '\0';
 566     I(identifier, Identifier(value), tk::Identifier_, hi::Identifier);
 567 }
 568
 569 ({IdentifierStart}{IdentifierPart}*)?{IdentifierFail} L E("invalid identifier")
 570     /* }}} */
 571     /* Number {{{ */
 572 0[0-7]+ L I(number, Number(strtoull(yytext + 1, NULL, 8)), tk::NumericLiteral, hi::Constant);
 573 0[0-9]+ L I(number, Number(strtoull(yytext + 1, NULL, 10)), tk::NumericLiteral, hi::Constant);
 574
 575 0[xX][0-9a-fA-F]+ L I(number, Number(strtoull(yytext + 2, NULL, 16)), tk::NumericLiteral, hi::Constant);
 576 0[oO][0-7]+ L I(number, Number(strtoull(yytext + 2, NULL, 8)), tk::NumericLiteral, hi::Constant);
 577 0[bB][0-1]+ L I(number, Number(strtoull(yytext + 2, NULL, 2)), tk::NumericLiteral, hi::Constant);
 578
 579 (\.[0-9]+|(0|[1-9][0-9]*)(\.[0-9]*)?)([eE][+-]?[0-9]+)? L I(number, Number(strtod(yytext, NULL)), tk::NumericLiteral, hi::Constant);
 580 (\.[0-9]+|(0|[1-9][0-9]*)(\.[0-9]*)?)[eE][+-]?{IdentifierScrap} L E("invalid exponent")
 581 (\.?[0-9]|(0|[1-9][0-9]*)\.){IdentifierScrap} L E("invalid number")
 582     /* }}} */
 583     /* String {{{ */
 584 \' L CYLexBufferStart(LegacySingleString);
 585 <LegacySingleString,StrictSingleString>{
 586     \' R CYLexBufferEnd(string, String, tk::StringLiteral, hi::Constant);
 587     {SingleCharacter}+ R CYLexBufferUnits(yytext, yyleng);
 588     {SingleCharacter}*{LineTerminatorSequence} R E("invalid newline");
 589     {SingleCharacter}*{UnicodeScrap} R E("invalid character");
 590 }
 591
 592 \" L CYLexBufferStart(LegacyDoubleString);
 593 <LegacyDoubleString,StrictDoubleString>{
 594     \" R CYLexBufferEnd(string, String, tk::StringLiteral, hi::Constant);
 595     {DoubleCharacter}+ R CYLexBufferUnits(yytext, yyleng);
 596     {DoubleCharacter}*{LineTerminatorSequence} R E("invalid newline");
 597     {DoubleCharacter}*{UnicodeScrap} R E("invalid character");
 598 }
 599     /* }}} */
 600     /* Template {{{ */
 601 "`" L yyextra->tail_ = false; CYLexBufferStart(StrictAccentString);
 602 <DivOrTemplateTail>"}" L yyextra->tail_ = true; S(template_); CYLexBufferStart(StrictAccentString);
 603
 604 <StrictAccentString>{
 605     "`" R CYLexBufferEnd(string, String, yyextra->tail_ ? tk::TemplateTail : tk::NoSubstitutionTemplate, hi::Constant);
 606     "${" R yyextra->template_.push(true); CYLexBufferEnd(string, String, yyextra->tail_ ? tk::TemplateMiddle : tk::TemplateHead, hi::Constant);
 607
 608     "$" R CYLexBufferUnit('$');
 609
 610     {PlateCharacter}+ R CYLexBufferUnits(yytext, yyleng);
 611     {PlateCharacter}*{LineTerminatorSequence} R E("invalid newline");
 612     {PlateCharacter}*{UnicodeScrap} R E("invalid character");
 613 }
 614     /* }}} */
 615     /* Escapes {{{ */
 616 <LegacySingleString,LegacyDoubleString>{
 617     \\[0-3][0-7][0-7] R CYLexBufferPoint(X(yytext[1]) << 6 | X(yytext[2]) << 3 | X(yytext[3]));
 618     \\[0-7][0-7] R CYLexBufferUnit(X(yytext[1]) << 3 | X(yytext[2]));
 619     \\[0-7] R CYLexBufferUnit(X(yytext[1]));
 620 }
 621
 622 <StrictSingleString,StrictDoubleString,StrictAccentString>{
 623     \\0[0-7] R E("legacy escape");
 624     \\0 R CYLexBufferUnit('\0');
 625 }
 626
 627 <LegacySingleString,LegacyDoubleString,StrictSingleString,StrictDoubleString,StrictAccentString>{
 628     \\b R CYLexBufferUnit('\b');
 629     \\f R CYLexBufferUnit('\f');
 630     \\n R CYLexBufferUnit('\n');
 631     \\r R CYLexBufferUnit('\r');
 632     \\t R CYLexBufferUnit('\t');
 633     \\v R CYLexBufferUnit('\v');
 634
 635     \\x{HexDigit}{2} R CYLexBufferPoint(X(yytext[2]) << 4 | X(yytext[3]));
 636
 637     \\u{HexDigit}{4} R CYLexBufferPoint(X(yytext[2]) << 12 | X(yytext[3]) << 8 | X(yytext[4]) << 4 | X(yytext[5]));
 638
 639     \\u\{{HexDigit}+\} R {
 640         unsigned point(0);
 641         for (yy_size_t i(3); i != yyleng - 1; ++i)
 642             point = point << 4 | X(yytext[i]);
 643         CYLexBufferPoint(point);
 644     }
 645
 646     \\{LineTerminatorSequence} yylloc->end.Lines();
 647     \\{NoneTerminatorCharacter} R CYLexBufferUnits(yytext + 1, yyleng - 1);
 648     \\{UnicodeScrap} R E("invalid character");
 649
 650     \\(x{HexDigit}{0,1}|u({HexDigit}{0,3}|\{{HexDigit}*))? R E("invalid escape");
 651     <<EOF>> R E("invalid string");
 652 }
 653     /* }}} */
 654
 655 {LineTerminatorSequence} yylloc->step(); yylloc->end.Lines(); yyextra->last_ = true; N
 656 {WhiteSpace} L
 657 {U1}|{UnicodeScrap} L E("invalid character");
 658
 659 <<EOF>> if (yyextra->auto_) { yyextra->auto_ = false; F(tk::AutoComplete, hi::Nothing); } L yyterminate();
 660
 661 %%
 662
 663 #undef yyextra
 664 #define yyextra this
 665 #define yyscanner scanner_
 666
 667 void CYDriver::ScannerInit() {
 668     cylex_init(&scanner_);
 669     cyset_extra(this, scanner_);
 670 }
 671
 672 void CYDriver::ScannerDestroy() {
 673     cylex_destroy(scanner_);
 674 }
 675
 676 void CYDriver::SetRegEx(bool equal) {
 677     CYLexBufferStart(RegularExpression);
 678     CYLexBufferUnit('/');
 679     if (equal)
 680         CYLexBufferUnit('=');
 681 }
 682
 683 void CYDriver::SetCondition(Condition condition) {
 684     struct yyguts_t *yyg(reinterpret_cast<struct yyguts_t *>(scanner_));
 685
 686     switch (condition) {
 687 @begin E4X
 688         case XMLContentCondition:
 689             BEGIN(XMLContent);
 690             break;
 691         case XMLTagCondition:
 692             BEGIN(XMLTag);
 693             break;
 694 @end
 695         default:
 696             _assert(false);
 697     }
 698 }
 699
 700 void CYDriver::PushCondition(Condition condition) {
 701     switch (condition) {
 702 @begin E4X
 703         case XMLContentCondition:
 704             yy_push_state(XMLContent, scanner_);
 705             break;
 706         case XMLTagCondition:
 707             yy_push_state(XMLTag, scanner_);
 708             break;
 709 @end
 710         default:
 711             _assert(false);
 712     }
 713 }
 714
 715 void CYDriver::PopCondition() {
 716     yy_pop_state(scanner_);
 717 }
 718
 719 bool CYLexerHighlight(hi::Value &highlight, CYLocation &location, void *scanner) {
 720     YYSTYPE value;
 721     if (cylex(&value, &location, scanner) == 0)
 722         return false;
 723     highlight = value.highlight_;
 724     return true;
 725 }
 726
 727 #if defined(__clang__)
 728 #pragma clang diagnostic pop
 729 #else
 730 // must not pop -Wunused-function
 731 //#pragma GCC diagnostic pop
 732 #endif