Scanner.lpp.in

   1 /* Cycript - The Truly Universal Scripting Language
   2  * Copyright (C) 2009-2016  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     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_) { \
  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 unsigned 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     return point;
 162 }
 163
 164 #define CYLexBufferPoint(point) do { \
 165     std::back_insert_iterator<std::vector<char> > inserter(yyextra->buffer_); \
 166     U(inserter, point); \
 167 } while (false)
 168
 169 #define CYLexBufferUnit(value) do { \
 170     yyextra->buffer_.push_back(value); \
 171 } while (false)
 172
 173 #define CYLexBufferUnits(data, size) do { \
 174     yyextra->buffer_.insert(yyextra->buffer_.end(), data, data + size); \
 175 } while (false)
 176
 177 #define CYLexBufferStart(condition) do { \
 178     yyextra->buffer_.clear(); \
 179     yy_push_state(condition, yyscanner); \
 180 } while (false)
 181
 182 #define CYLexBufferEnd(type, Type, value, highlight) do { \
 183     yy_pop_state(yyscanner); \
 184     I(type, Type(P.strmemdup(yyextra->buffer_.data(), yyextra->buffer_.size()), yyextra->buffer_.size()), value, highlight); \
 185 } while (false)
 186
 187 #define YY_INPUT(data, value, size) do { \
 188     value = yyextra->data_.sgetn(data, size) ?: YY_NULL; \
 189 } while (false)
 190
 191 %}
 192
 193 %option prefix="cy"
 194 %option bison-bridge
 195 %option bison-locations
 196 %option nodefault
 197 %option noyywrap
 198 %option noyylineno
 199 %option nounput
 200 %option nounistd
 201 %option 8bit
 202 %option backup
 203 %option batch
 204 %option never-interactive
 205 %option pointer
 206 %option reentrant
 207 %option stack
 208
 209 U1 [\x00-\x7f]
 210 U0 [\x80-\xbf]
 211 U2 [\xc2-\xdf]
 212 U3 [\xe0-\xef]
 213 U4 [\xf0-\xf4]
 214 UN [\xc0-\xc1\xf5-\xff]
 215 UE {U1}|{U2}|{U3}|{U4}|{UN}
 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 NoneTerminatorCharacter [^\r\n\x80-\xff]|{NotLineTerminator}
 224 RegExCharacter [^/[\\]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 225 RegClsCharacter [^]\\]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 226 CommentCharacter [^*/]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 227 SingleCharacter [^'\\]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 228 DoubleCharacter [^"\\]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 229 PlateCharacter [^$`\\]{-}[\r\n\x80-\xff]|{NotLineTerminator}
 230
 231 @include UnicodeIDStart.l
 232 @include UnicodeIDContinue.l
 233 IdentifierMore [$_]
 234
 235 UnicodeStart {IdentifierMore}|{UnicodeIDStart}
 236 UnicodePart {IdentifierMore}|\xe2\x80[\x8c\x8d]|{UnicodeIDContinue}
 237 UnicodeScrap {U2}|{U3}{U0}{0,1}|{U4}{U0}{0,2}|{UN}|{U0}
 238 UnicodeError ({U2}|{U3}{U0}{0,1}|{U4}{U0}{0,2}){UE}|{UN}|{U0}
 239
 240 IdentifierStart {UnicodeStart}|{UnicodeEscape}
 241 IdentifierPart {UnicodePart}|{UnicodeEscape}
 242 IdentifierFail {UnicodeError}|\\(u({HexDigit}{0,3}|\{{HexDigit}*))?
 243 IdentifierScrap {IdentifierPart}*{IdentifierFail}?
 244
 245 RegularExpressionBackslashSequence \\{NoneTerminatorCharacter}
 246 RegularExpressionClassChars ({RegClsCharacter}|{RegularExpressionBackslashSequence})*
 247
 248 @begin E4X
 249 XMLNameStart [a-zA-Z_:]
 250 XMLNamePart [a-zA-Z0-9.-_:]
 251 XMLName {XMLNameStart}{XMLNamePart}*
 252 @end
 253
 254 %x RegularExpression
 255 %x MultiLine
 256
 257 %x LegacySingleString
 258 %x LegacyDoubleString
 259
 260 %x StrictSingleString
 261 %x StrictDoubleString
 262 %x StrictAccentString
 263
 264 %s Div
 265 %s DivOrTemplateTail
 266
 267 @begin E4X
 268 %x XMLContent
 269 %x XMLTag
 270 @end
 271
 272 %%
 273
 274     /* RegEx {{{ */
 275 <RegularExpression>{
 276     \/{UnicodePart}* R CYLexBufferUnits(yytext, yyleng); CYLexBufferEnd(literal, RegEx, tk::RegularExpressionLiteral_, hi::Constant);
 277     \/{UnicodePart}*{UnicodeError} R E("invalid character");
 278
 279     {RegExCharacter}+ R CYLexBufferUnits(yytext, yyleng);
 280
 281     {RegularExpressionBackslashSequence} R CYLexBufferUnits(yytext, yyleng);
 282     \\ R E("invalid escape")
 283
 284     (\\|{RegExCharacter}+)?{LineTerminatorSequence} R E("invalid newline");
 285     (\\|{RegExCharacter}+)?{UnicodeScrap} R E("invalid character");
 286
 287     "["{RegularExpressionClassChars}"]" R CYLexBufferUnits(yytext, yyleng);
 288     "["{RegularExpressionClassChars}\\? R E("invalid class");
 289
 290     "["{RegularExpressionClassChars}\\?{LineTerminatorSequence} R E("invalid newline");
 291     "["{RegularExpressionClassChars}\\?{UnicodeScrap} R E("invalid character");
 292
 293     <<EOF>> R E("unterminated regex")
 294 }
 295     /* }}} */
 296     /* Comment {{{ */
 297     /* XXX: maybe fold LineTerminatorSequence into these definitions */
 298 #!{NoneTerminatorCharacter}* L M
 299 \/\/{NoneTerminatorCharacter}* L M
 300 (#!|\/\/){NoneTerminatorCharacter}*{UnicodeError} L E("invalid character");
 301
 302 \/\* L yy_push_state(MultiLine, yyscanner);
 303
 304 <MultiLine>{
 305     \**\*\/ R yy_pop_state(yyscanner); M N
 306     \**{LineTerminatorSequence} yylloc->end.Lines(); yyextra->last_ = true;
 307     \**{CommentCharacter}|\/ R
 308
 309     \**{UnicodeScrap} R E("invalid character");
 310     \**\* R E("invalid comment");
 311
 312     <<EOF>> R E("invalid comment")
 313 }
 314     /* }}} */
 315     /* Element {{{ */
 316 @begin E4X
 317 <RegExp>"<>"      L F(tk::LeftRight, hi::Structure);
 318 <XMLContent>"</>" L F(tk::LeftSlashRight, hi::Structure);
 319
 320 <RegExp,XMLContent>\<!\[CDATA\[(\n|[^[]|\[[^[]|\[\[[^>])*]]> V() F(tk::XMLCDATA, hi::Constant);
 321 <RegExp,XMLContent>\<!--(\n|[^-]|-[^-])*--> V() F(tk::XMLComment, hi::Comment);
 322 <RegExp,XMLContent>\<?(\n|[^?]|\?[^>])*?> V() F(tk::XMLPI, hi::Meta);
 323
 324 <XMLTag>"="  L F(tk::Equal, hi::Structure);
 325 <XMLTag>">"  L F(tk::Right, hi::Structure);
 326 <XMLTag>"/>" L F(tk::SlashRight, hi::Structure);
 327 <XMLTag>"{"  L F(tk::OpenBrace, hi::Structure);
 328
 329 <XMLTag>\"(\n|[^"])*\"|'(\n|[^'])*' V() F(tk::XMLAttributeValue, hi::Constant);
 330 <XMLTag>{XMLName} L F(tk::XMLName, hi::Identifier);
 331 <XMLTag>[ \t\r\n] V() F(tk::XMLWhitespace, hi::Nothing);
 332
 333 <XMLContent>"{"  L F(tk::OpenBrace, hi::Structure);
 334 <XMLContent>"<"  L F(tk::Left, hi::Structure);
 335 <XMLContent>"</" L F(tk::LeftSlash, hi::Structure);
 336 @end
 337     /* }}} */
 338     /* Operator {{{ */
 339 "..."  L F(tk::PeriodPeriodPeriod, hi::Meta);
 340 ".."   L E("invalid operator")
 341
 342 @begin E4X
 343 ".."   L F(tk::PeriodPeriod, hi::Operator);
 344 @end
 345
 346 @begin E4X ObjectiveC
 347 "@"    L F(tk::At, hi::Operator);
 348 @end
 349
 350 "&"    L F(tk::Ampersand, hi::Operator);
 351 "&&"   L F(tk::AmpersandAmpersand, hi::Operator);
 352 "&="   L F(tk::AmpersandEqual, hi::Operator);
 353 "^"    L F(tk::Carrot, hi::Operator);
 354 "^="   L F(tk::CarrotEqual, hi::Operator);
 355 "="    L F(tk::Equal, hi::Operator);
 356 "=="   L F(tk::EqualEqual, hi::Operator);
 357 "==="  L F(tk::EqualEqualEqual, hi::Operator);
 358 "=>"   L F(tk::EqualRight, hi::Operator);
 359 "!"    L F(tk::Exclamation, hi::Operator);
 360 "!="   L F(tk::ExclamationEqual, hi::Operator);
 361 "!=="  L F(tk::ExclamationEqualEqual, hi::Operator);
 362 "-"    L F(tk::Hyphen, hi::Operator);
 363 "-="   L F(tk::HyphenEqual, hi::Operator);
 364 "--"   L F(tk::HyphenHyphen, hi::Operator);
 365 "->"   L F(tk::HyphenRight, hi::Operator);
 366 "<"    L F(tk::Left, hi::Operator);
 367 "<="   L F(tk::LeftEqual, hi::Operator);
 368 "<<"   L F(tk::LeftLeft, hi::Operator);
 369 "<<="  L F(tk::LeftLeftEqual, hi::Operator);
 370 "%"    L F(tk::Percent, hi::Operator);
 371 "%="   L F(tk::PercentEqual, hi::Operator);
 372 "."    L F(tk::Period, hi::Operator);
 373 "?."   L F(tk::QuestionPeriod, hi::Operator);
 374 "|"    L F(tk::Pipe, hi::Operator);
 375 "|="   L F(tk::PipeEqual, hi::Operator);
 376 "||"   L F(tk::PipePipe, hi::Operator);
 377 "+"    L F(tk::Plus, hi::Operator);
 378 "+="   L F(tk::PlusEqual, hi::Operator);
 379 "++"   L F(tk::PlusPlus, hi::Operator);
 380 ">"    L F(tk::Right, hi::Operator);
 381 ">="   L F(tk::RightEqual, hi::Operator);
 382 ">>"   L F(tk::RightRight, hi::Operator);
 383 ">>="  L F(tk::RightRightEqual, hi::Operator);
 384 ">>>"  L F(tk::RightRightRight, hi::Operator);
 385 ">>>=" L F(tk::RightRightRightEqual, hi::Operator);
 386 "*"    L F(tk::Star, hi::Operator);
 387 "*="   L F(tk::StarEqual, hi::Operator);
 388 "~"    L F(tk::Tilde, hi::Operator);
 389
 390 "/"  L F(tk::Slash, hi::Operator);
 391 "/=" L F(tk::SlashEqual, hi::Operator);
 392
 393 ":"    L F(tk::Colon, hi::Structure);
 394 "::"   L F(tk::ColonColon, hi::Structure);
 395 ","    L F(tk::Comma, hi::Structure);
 396 "?"    L F(tk::Question, hi::Structure);
 397 ";"    L F(tk::SemiColon, hi::Structure);
 398 "#"    L F(tk::Pound, hi::Operator);
 399
 400 "("    L F(tk::OpenParen, hi::Structure);
 401 ")"    L F(tk::CloseParen, hi::Structure);
 402
 403 "{"    L yyextra->template_.push(false); F(tk::OpenBrace, hi::Structure);
 404 <Div>"}" L S(template_); F(tk::CloseBrace, hi::Structure);
 405
 406 "["    L F(tk::OpenBracket, hi::Structure);
 407 "]"    L F(tk::CloseBracket, hi::Structure);
 408     /* }}} */
 409     /* Keyword {{{ */
 410 "@error"          L F(tk::At_error_, hi::Error);
 411
 412 @begin Java
 413 "@class"          L F(tk::At_class_, hi::Meta);
 414 @end
 415
 416 @begin C
 417 "@encode"         L F(tk::At_encode_, hi::Meta);
 418 @end
 419
 420 @begin ObjectiveC
 421 "@end"            L F(tk::At_end_, hi::Meta);
 422 "@false"          L F(tk::At_false_, hi::Constant);
 423 "@implementation" L F(tk::At_implementation_, hi::Meta);
 424 "@import"         L F(tk::At_import_, hi::Special);
 425 "@NO"             L F(tk::At_NO_, hi::Constant);
 426 "@null"           L F(tk::At_null_, hi::Constant);
 427 "@selector"       L F(tk::At_selector_, hi::Meta);
 428 "@true"           L F(tk::At_true_, hi::Constant);
 429 "@YES"            L F(tk::At_YES_, hi::Constant);
 430 @end
 431
 432 @({UnicodeStart}{UnicodePart}*{UnicodeError}?|{UnicodeError}) L E("invalid keyword")
 433     /* }}} */
 434     /* Highlight {{{ */
 435 "undefined"       L F(tk::_undefined_, hi::Operator);
 436
 437 @begin ObjectiveC
 438 "bool"            L F(tk::_bool_, hi::Type);
 439 "BOOL"            L F(tk::_BOOL_, hi::Type);
 440 "id"              L F(tk::_id_, hi::Type);
 441 "nil"             L F(tk::_nil_, hi::Constant);
 442 "NULL"            L F(tk::_NULL_, hi::Constant);
 443 "SEL"             L F(tk::_SEL_, hi::Type);
 444 @end
 445     /* }}} */
 446     /* Reserved {{{ */
 447 "abstract"        L /*FII*/ F(tk::_abstract_, hi::Meta);
 448 "as"              L /*III*/ F(tk::_as_, hi::Meta);
 449 "await"           L /*II?*/ F(tk::_await_, hi::Meta);
 450 "boolean"         L /*FII*/ F(tk::_boolean_, hi::Type);
 451 "break"           L /*KKK*/ F(tk::_break_, hi::Control);
 452 "byte"            L /*FII*/ F(tk::_byte_, hi::Type);
 453 "case"            L /*KKK*/ F(tk::_case_, hi::Control);
 454 "catch"           L /*KKK*/ F(tk::_catch_, hi::Control);
 455 "char"            L /*FII*/ F(tk::_char_, hi::Type);
 456 "class"           L /*FFK*/ F(tk::_class_, hi::Meta);
 457 "const"           L /*FFK*/ F(tk::_const_, hi::Meta);
 458 "constructor"     L /*III*/ F(tk::_constructor_, hi::Special);
 459 "continue"        L /*KKK*/ F(tk::_continue_, hi::Control);
 460 "debugger"        L /*FKK*/ F(tk::_debugger_, hi::Meta);
 461 "default"         L /*KKK*/ F(tk::_default_, hi::Control);
 462 "delete"          L /*KKK*/ F(tk::_delete_, hi::Operator);
 463 "do"              L /*KKK*/ F(tk::_do_, hi::Control);
 464 "double"          L /*FII*/ F(tk::_double_, hi::Type);
 465 "else"            L /*KKK*/ F(tk::_else_, hi::Control);
 466 "enum"            L /*FFF*/ F(tk::_enum_, hi::Meta);
 467 "export"          L /*FFK*/ F(tk::_export_, hi::Meta);
 468 "extends"         L /*FFK*/ F(tk::_extends_, hi::Meta);
 469 "eval"            L /*III*/ F(tk::_eval_, hi::Special);
 470 "false"           L /*LLL*/ F(tk::_false_, hi::Constant);
 471 "final"           L /*FII*/ F(tk::_final_, hi::Meta);
 472 "finally"         L /*KKK*/ F(tk::_finally_, hi::Control);
 473 "float"           L /*FII*/ F(tk::_float_, hi::Type);
 474 "for"             L /*KKK*/ F(tk::_for_, hi::Control);
 475 "from"            L /*III*/ F(tk::_from_, hi::Meta);
 476 "function"        L /*KKK*/ F(tk::_function_, hi::Meta);
 477 "goto"            L /*FII*/ F(tk::_goto_, hi::Control);
 478 "get"             L /*III*/ F(tk::_get_, hi::Meta);
 479 "if"              L /*KKK*/ F(tk::_if_, hi::Control);
 480 "implements"      L /*FSS*/ F(tk::_implements_, hi::Meta);
 481 "import"          L /*FFK*/ F(tk::_import_, hi::Meta);
 482 "in"              L /*KKK*/ F(tk::_in_, hi::Operator);
 483 "Infinity"        L /*III*/ F(tk::_Infinity_, hi::Constant);
 484 "instanceof"      L /*KKK*/ F(tk::_instanceof_, hi::Operator);
 485 "int"             L /*FII*/ F(tk::_int_, hi::Type);
 486 "__int128"        L /*III*/ F(tk::___int128_, 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 "__proto__"       L /*III*/ F(tk::___proto___, hi::Special);
 497 "prototype"       L /*III*/ F(tk::_prototype_, hi::Special);
 498 "public"          L /*FSS*/ F(tk::_public_, hi::Meta);
 499 "return"          L /*KKK*/ F(tk::_return_, hi::Control);
 500 "set"             L /*III*/ F(tk::_set_, hi::Meta);
 501 "short"           L /*FII*/ F(tk::_short_, hi::Type);
 502 "static"          L /*FS?*/ F(tk::_static_, hi::Meta);
 503 "super"           L /*FFK*/ F(tk::_super_, hi::Constant);
 504 "switch"          L /*KKK*/ F(tk::_switch_, hi::Control);
 505 "synchronized"    L /*FII*/ F(tk::_synchronized_, hi::Meta);
 506 "target"          L /*III*/ F(tk::_target_, hi::Identifier);
 507 "this"            L /*KKK*/ F(tk::_this_, hi::Constant);
 508 "throw"           L /*KKK*/ F(tk::_throw_, hi::Control);
 509 "throws"          L /*FII*/ F(tk::_throws_, hi::Meta);
 510 "transient"       L /*FII*/ F(tk::_transient_, hi::Meta);
 511 "true"            L /*LLL*/ F(tk::_true_, hi::Constant);
 512 "try"             L /*KKK*/ F(tk::_try_, hi::Control);
 513 "typeid"          L /*III*/ F(tk::_typeid_, hi::Operator);
 514 "typeof"          L /*KKK*/ F(tk::_typeof_, hi::Operator);
 515 "var"             L /*KKK*/ F(tk::_var_, hi::Meta);
 516 "void"            L /*KKK*/ F(tk::_void_, hi::Operator);
 517 "volatile"        L /*FII*/ F(tk::_volatile_, hi::Meta);
 518 "while"           L /*KKK*/ F(tk::_while_, hi::Control);
 519 "with"            L /*KKK*/ F(tk::_with_, hi::Control);
 520 "yield"           L /*IS?*/ F(tk::_yield_, hi::Control);
 521
 522 "each"            L F(tk::_each_, hi::Control);
 523 "of"              L F(tk::_of_, hi::Operator);
 524
 525 @begin C
 526 "extern"          L F(tk::_extern_, hi::Type);
 527 "signed"          L F(tk::_signed_, hi::Type);
 528 "struct"          L F(tk::_struct_, hi::Meta);
 529 "typedef"         L F(tk::_typedef_, hi::Meta);
 530 "unsigned"        L F(tk::_unsigned_, hi::Type);
 531 @end
 532
 533 @begin ObjectiveC
 534 "NO"              L F(tk::_NO_, hi::Constant);
 535 "YES"             L F(tk::_YES_, hi::Constant);
 536 @end
 537
 538 @begin E4X
 539 "namespace"       L F(tk::_namespace_, hi::Meta);
 540 "xml"             L F(tk::_xml_, hi::Meta);
 541 @end
 542     /* }}} */
 543     /* Identifier {{{ */
 544 {UnicodeStart}{UnicodePart}* L I(identifier, Identifier(Y), tk::Identifier_, hi::Identifier);
 545
 546 {IdentifierStart}{IdentifierPart}* L {
 547     char *value(A char[yyleng + 1]);
 548     char *local(value);
 549
 550     for (yy_size_t i(0), e(yyleng); i != e; ++i) {
 551         char next(yytext[i]);
 552         if (next != '\\')
 553             *local++ = next;
 554         else {
 555             bool (*is)(unsigned) = (i == 0 ? &IsIdentifierStart : &IsIdentifierContinue);
 556             unsigned point(U(local, yytext, ++i));
 557             if (!is(point))
 558                 E("invalid character");
 559         }
 560     }
 561
 562     *local = '\0';
 563     I(identifier, Identifier(value), tk::Identifier_, hi::Identifier);
 564 }
 565
 566 ({IdentifierStart}{IdentifierPart}*)?{IdentifierFail} L E("invalid identifier")
 567     /* }}} */
 568     /* Number {{{ */
 569 0[0-7]+ L I(number, Number(strtoull(yytext + 1, NULL, 8)), tk::NumericLiteral, hi::Constant);
 570 0[0-9]+ L I(number, Number(strtoull(yytext + 1, NULL, 10)), tk::NumericLiteral, hi::Constant);
 571
 572 0[xX][0-9a-fA-F]+ L I(number, Number(strtoull(yytext + 2, NULL, 16)), tk::NumericLiteral, hi::Constant);
 573 0[oO][0-7]+ L I(number, Number(strtoull(yytext + 2, NULL, 8)), tk::NumericLiteral, hi::Constant);
 574 0[bB][0-1]+ L I(number, Number(strtoull(yytext + 2, NULL, 2)), tk::NumericLiteral, hi::Constant);
 575
 576 (\.[0-9]+|(0|[1-9][0-9]*)(\.[0-9]*)?)([eE][+-]?[0-9]+)? L I(number, Number(strtod(yytext, NULL)), tk::NumericLiteral, hi::Constant);
 577 (\.[0-9]+|(0|[1-9][0-9]*)(\.[0-9]*)?)[eE][+-]?{IdentifierScrap} L E("invalid exponent")
 578 (\.?[0-9]|(0|[1-9][0-9]*)\.){IdentifierScrap} L E("invalid number")
 579     /* }}} */
 580     /* String {{{ */
 581 \' L CYLexBufferStart(LegacySingleString);
 582 <LegacySingleString,StrictSingleString>{
 583     \' R CYLexBufferEnd(string, String, tk::StringLiteral, hi::Constant);
 584     {SingleCharacter}+ R CYLexBufferUnits(yytext, yyleng);
 585     {SingleCharacter}*{LineTerminatorSequence} R E("invalid newline");
 586     {SingleCharacter}*{UnicodeScrap} R E("invalid character");
 587 }
 588
 589 \" L CYLexBufferStart(LegacyDoubleString);
 590 <LegacyDoubleString,StrictDoubleString>{
 591     \" R CYLexBufferEnd(string, String, tk::StringLiteral, hi::Constant);
 592     {DoubleCharacter}+ R CYLexBufferUnits(yytext, yyleng);
 593     {DoubleCharacter}*{LineTerminatorSequence} R E("invalid newline");
 594     {DoubleCharacter}*{UnicodeScrap} R E("invalid character");
 595 }
 596     /* }}} */
 597     /* Template {{{ */
 598 "`" L yyextra->tail_ = false; CYLexBufferStart(StrictAccentString);
 599 <DivOrTemplateTail>"}" L yyextra->tail_ = true; S(template_); CYLexBufferStart(StrictAccentString);
 600
 601 <StrictAccentString>{
 602     "`" R CYLexBufferEnd(string, String, yyextra->tail_ ? tk::TemplateTail : tk::NoSubstitutionTemplate, hi::Constant);
 603     "${" R yyextra->template_.push(true); CYLexBufferEnd(string, String, yyextra->tail_ ? tk::TemplateMiddle : tk::TemplateHead, hi::Constant);
 604
 605     "$" R CYLexBufferUnit('$');
 606
 607     {PlateCharacter}+ R CYLexBufferUnits(yytext, yyleng);
 608     {PlateCharacter}*{UnicodeScrap} R E("invalid character");
 609
 610     {PlateCharacter}*{LineTerminatorSequence} yylloc->end.Lines(); CYLexBufferUnits(yytext, yyleng);
 611     \\{LineTerminatorSequence} yylloc->end.Lines();
 612 }
 613     /* }}} */
 614     /* Escapes {{{ */
 615 <LegacySingleString,LegacyDoubleString>{
 616     \\[0-3][0-7][0-7] R CYLexBufferPoint(X(yytext[1]) << 6 | X(yytext[2]) << 3 | X(yytext[3]));
 617     \\[0-7][0-7] R CYLexBufferUnit(X(yytext[1]) << 3 | X(yytext[2]));
 618     \\[0-7] R CYLexBufferUnit(X(yytext[1]));
 619 }
 620
 621 <StrictSingleString,StrictDoubleString,StrictAccentString>{
 622     \\0[0-7] R E("legacy escape");
 623     \\0 R CYLexBufferUnit('\0');
 624 }
 625
 626 <LegacySingleString,LegacyDoubleString,StrictSingleString,StrictDoubleString,StrictAccentString>{
 627     \\b R CYLexBufferUnit('\b');
 628     \\f R CYLexBufferUnit('\f');
 629     \\n R CYLexBufferUnit('\n');
 630     \\r R CYLexBufferUnit('\r');
 631     \\t R CYLexBufferUnit('\t');
 632     \\v R CYLexBufferUnit('\v');
 633
 634     \\x{HexDigit}{2} R CYLexBufferPoint(X(yytext[2]) << 4 | X(yytext[3]));
 635
 636     \\u{HexDigit}{4} R CYLexBufferPoint(X(yytext[2]) << 12 | X(yytext[3]) << 8 | X(yytext[4]) << 4 | X(yytext[5]));
 637
 638     \\u\{{HexDigit}+\} R {
 639         unsigned point(0);
 640         for (yy_size_t i(3); i != yyleng - 1; ++i)
 641             point = point << 4 | X(yytext[i]);
 642         CYLexBufferPoint(point);
 643     }
 644
 645     \\{LineTerminatorSequence} yylloc->end.Lines();
 646     \\{NoneTerminatorCharacter} R CYLexBufferUnits(yytext + 1, yyleng - 1);
 647     \\{UnicodeScrap} R E("invalid character");
 648
 649     \\(x{HexDigit}{0,1}|u({HexDigit}{0,3}|\{{HexDigit}*))? R E("invalid escape");
 650     <<EOF>> R E("invalid string");
 651 }
 652     /* }}} */
 653
 654 {LineTerminatorSequence} yylloc->step(); yylloc->end.Lines(); yyextra->last_ = true; N
 655 {WhiteSpace} L
 656 {U1}|{UnicodeScrap} L E("invalid character");
 657
 658 <<EOF>> if (yyextra->auto_) { yyextra->auto_ = false; F(tk::AutoComplete, hi::Nothing); } L yyterminate();
 659
 660 %%
 661
 662 #undef yyextra
 663 #define yyextra this
 664 #define yyscanner scanner_
 665
 666 void CYDriver::ScannerInit() {
 667     cylex_init(&scanner_);
 668     cyset_extra(this, scanner_);
 669 }
 670
 671 void CYDriver::ScannerDestroy() {
 672     cylex_destroy(scanner_);
 673 }
 674
 675 void CYDriver::SetRegEx(bool equal) {
 676     CYLexBufferStart(RegularExpression);
 677     CYLexBufferUnit('/');
 678     if (equal)
 679         CYLexBufferUnit('=');
 680 }
 681
 682 void CYDriver::SetCondition(Condition condition) {
 683     struct yyguts_t *yyg(reinterpret_cast<struct yyguts_t *>(scanner_));
 684
 685     switch (condition) {
 686 @begin E4X
 687         case XMLContentCondition:
 688             BEGIN(XMLContent);
 689             break;
 690         case XMLTagCondition:
 691             BEGIN(XMLTag);
 692             break;
 693 @end
 694         default:
 695             _assert(false);
 696     }
 697 }
 698
 699 void CYDriver::PushCondition(Condition condition) {
 700     switch (condition) {
 701 @begin E4X
 702         case XMLContentCondition:
 703             yy_push_state(XMLContent, scanner_);
 704             break;
 705         case XMLTagCondition:
 706             yy_push_state(XMLTag, scanner_);
 707             break;
 708 @end
 709         default:
 710             _assert(false);
 711     }
 712 }
 713
 714 void CYDriver::PopCondition() {
 715     yy_pop_state(scanner_);
 716 }
 717
 718 bool CYLexerHighlight(hi::Value &highlight, CYLocation &location, void *scanner) {
 719     YYSTYPE value;
 720     if (cylex(&value, &location, scanner) == 0)
 721         return false;
 722     highlight = value.highlight_;
 723     return true;
 724 }
 725
 726 #if defined(__clang__)
 727 #pragma clang diagnostic pop
 728 #else
 729 // must not pop -Wunused-function
 730 //#pragma GCC diagnostic pop
 731 #endif