Cycript.l.in

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2014  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Affero General Public License, Version 3 {{{ */
   6 /*
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 /* XXX: supposedly I will be screwed on very very long multi-line comments and need to replace these with a manual lexer. http://websrv.cs.fsu.edu/~engelen/courses/COP5621/Pr2.pdf */
  23
  24 %{
  25
  26 #if defined(__clang__)
  27 #pragma clang diagnostic push
  28 #pragma clang diagnostic ignored "-Wunknown-pragmas"
  29 #pragma clang diagnostic ignored "-Wdeprecated-register"
  30 #endif
  31
  32 #define YYLTYPE cy::location
  33 #include "Cycript.tab.hh"
  34 typedef cy::parser::token tk;
  35
  36 #include "Highlight.hpp"
  37
  38 #define YY_EXTRA_TYPE CYDriver *
  39
  40 // do /not/ fold token to the return: this is a macro and the ordering is dependent
  41 #define F(value, highlight) do { \
  42     int token(value); \
  43 @begin ObjectiveC
  44     yyextra->no_.AtImplementation = false; \
  45 @end
  46     yyextra->no_.Function = false; \
  47     yyextra->no_.OpenBrace = false; \
  48     yylval->highlight_ = highlight; \
  49     return token; \
  50 } while (false)
  51
  52 #define A new($pool)
  53 #define Y $pool.strmemdup(yytext, yyleng)
  54
  55 #define I(type, Type, value, highlight) do { \
  56     yylval->type ## _ = A CY ## Type; \
  57     F(value, highlight); \
  58 } while (false)
  59
  60 #define T yylval->newline_ = yyextra->state_ == CYNewLine; BEGIN(Div);
  61 #define C T yyextra->state_ = CYClear;
  62 #define R T yyextra->state_ = CYRestricted;
  63
  64 #define N \
  65     if (yyextra->state_ != CYNewLine) { \
  66         if (yyextra->state_ != CYRestricted) \
  67             yyextra->state_ = CYNewLine; \
  68         else { \
  69             yyextra->state_ = CYClear; \
  70             F(tk::NewLine, hi::Nothing); \
  71         } \
  72     }
  73
  74 #define V(more) { \
  75     if (const char *nl = reinterpret_cast<const char *>(memchr(yytext, '\n', yyleng))) { \
  76         unsigned lines(0); \
  77         size_t left; \
  78         do { \
  79             ++lines; \
  80             left = yyleng - (nl - yytext) - 1; \
  81             nl = reinterpret_cast<const char *>(memchr(nl + 1, '\n', left)); \
  82         } while (nl != NULL); \
  83         yylloc->end.lines(lines); \
  84         yylloc->end.columns(left); \
  85         yylloc->step(); \
  86         more \
  87     } else L \
  88 }
  89
  90 #define L { \
  91     yylloc->step(); \
  92     yylloc->columns(yyleng); \
  93 }
  94
  95 #define M { \
  96     if (yyextra->commented_) { \
  97         I(comment, Comment(Y), tk::Comment, hi::Comment); \
  98     } \
  99 }
 100
 101 int H(char c) {
 102     if (c >= '0' && c <= '9')
 103         return c - '0';
 104     if (c >= 'a' && c <= 'f')
 105         return c - 'a' + 10;
 106     if (c >= 'A' && c <= 'F')
 107         return c - 'A' + 10;
 108     return -1;
 109 }
 110
 111 #define YY_INPUT(data, value, size) { \
 112     if (yyextra->data_.eof()) \
 113         value = YY_NULL; \
 114     else { \
 115         yyextra->data_.read(data, size); \
 116         size_t copy(yyextra->data_.gcount()); \
 117         value = copy == 0 ? YY_NULL : copy; \
 118     } \
 119 }
 120
 121 %}
 122
 123 %option prefix="cy"
 124 %option bison-bridge
 125 %option bison-locations
 126 %option noyywrap
 127 %option yylineno
 128 %option nounput
 129 %option batch
 130 %option never-interactive
 131 %option reentrant
 132 %option stack
 133
 134 Exponent [eE][+-]?[0-9]+
 135 Escape   \\[\\'"bfnrtv]|\\0|\\x[0-9a-fA-F]{2}|\\u[0-9a-fA-F]{4}|\\\n
 136
 137 IdentifierStart [a-zA-Z$_]
 138 IdentifierPart  [a-zA-Z$_0-9]
 139
 140 NonTerminator [^\n]
 141 BackslashSequence \\{NonTerminator}
 142 RegularExpressionFirstChar [^\n*\\/]|{BackslashSequence}
 143 RegularExpressionChar [^\n\\/]|{BackslashSequence}
 144 RegularExpressionFlags {IdentifierPart}*
 145 RegularExpressionChars {RegularExpressionChar}*
 146 RegularExpressionBody {RegularExpressionFirstChar}{RegularExpressionChars}
 147
 148 @begin E4X
 149 XMLNameStart [a-zA-Z_:]
 150 XMLNamePart [a-zA-Z0-9.-_:]
 151 XMLName {XMLNameStart}{XMLNamePart}*
 152 @end
 153
 154 %s Div
 155 %s RegExp
 156
 157 @begin E4X
 158 %x XMLContent
 159 %x XMLTag
 160 @end
 161
 162 %%
 163
 164 <RegExp>\/{RegularExpressionBody}\/{RegularExpressionFlags} L C I(literal, RegEx(Y), tk::RegularExpressionLiteral, hi::Constant);
 165
 166 #![^\n]* L M
 167
 168 \/\/[^\n]* L M
 169
 170         /* http://ostermiller.org/findcomment.html */
 171         /* XXX: unify these two rules using !? */
 172 \/\*!([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+\/ V() C I(comment, Comment(Y), tk::Comment, hi::Comment);
 173 \/\*([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+\/ V(N) M
 174
 175 @begin E4X
 176 <RegExp>"<>"      L F(tk::LeftRight, hi::Structure);
 177 <XMLContent>"</>" L F(tk::LeftSlashRight, hi::Structure);
 178
 179 <RegExp,XMLContent>\<!\[CDATA\[(\n|[^[]|\[[^[]|\[\[[^>])*]]> V() F(tk::XMLCDATA, hi::Constant);
 180 <RegExp,XMLContent>\<!--(\n|[^-]|-[^-])*--> V() F(tk::XMLComment, hi::Comment);
 181 <RegExp,XMLContent>\<?(\n|[^?]|\?[^>])*?> V() F(tk::XMLPI, hi::Meta);
 182
 183 <XMLTag>"="  L F(tk::Equal, hi::Structure);
 184 <XMLTag>">"  L F(tk::Right, hi::Structure);
 185 <XMLTag>"/>" L F(tk::SlashRight, hi::Structure);
 186 <XMLTag>"{"  L F(tk::OpenBrace, hi::Structure);
 187
 188 <XMLTag>\"(\n|[^"])*\"|'(\n|[^'])*' V() F(tk::XMLAttributeValue, hi::Constant);
 189 <XMLTag>{XMLName} L F(tk::XMLName, hi::Identifier);
 190 <XMLTag>[ \t\r\n] V() F(tk::XMLWhitespace, hi::Nothing);
 191
 192 <XMLContent>"{"  L F(tk::OpenBrace, hi::Structure);
 193 <XMLContent>"<"  L F(tk::Left, hi::Structure);
 194 <XMLContent>"</" L F(tk::LeftSlash, hi::Structure);
 195 @end
 196
 197 "..."  L C F(tk::PeriodPeriodPeriod, hi::Meta);
 198
 199 @begin E4X
 200 "::"   L C F(tk::ColonColon, hi::Operator);
 201 ".."   L C F(tk::PeriodPeriod, hi::Operator);
 202 @end
 203
 204 @begin E4X ObjectiveC
 205 "@"    L C F(tk::At, hi::Operator);
 206 "#"    L C F(tk::Pound, hi::Operator);
 207 @end
 208
 209 "&"    L C F(tk::Ampersand, hi::Operator);
 210 "&&"   L C F(tk::AmpersandAmpersand, hi::Operator);
 211 "&="   L C F(tk::AmpersandEqual, hi::Operator);
 212 "^"    L C F(tk::Carrot, hi::Operator);
 213 "^="   L C F(tk::CarrotEqual, hi::Operator);
 214 "="    L C F(tk::Equal, hi::Operator);
 215 "=="   L C F(tk::EqualEqual, hi::Operator);
 216 "==="  L C F(tk::EqualEqualEqual, hi::Operator);
 217 "=>"   L C F(tk::EqualRight, hi::Operator);
 218 "!"    L C F(tk::Exclamation, hi::Operator);
 219 "!="   L C F(tk::ExclamationEqual, hi::Operator);
 220 "!=="  L C F(tk::ExclamationEqualEqual, hi::Operator);
 221 "-"    L C F(tk::Hyphen, hi::Operator);
 222 "-="   L C F(tk::HyphenEqual, hi::Operator);
 223 "--"   L C F(yylval->newline_ ? tk::HyphenHyphen_ : tk::HyphenHyphen, hi::Operator);
 224 "->"   L C F(tk::HyphenRight, hi::Operator);
 225 "<"    L C F(tk::Left, hi::Operator);
 226 "<="   L C F(tk::LeftEqual, hi::Operator);
 227 "<<"   L C F(tk::LeftLeft, hi::Operator);
 228 "<<="  L C F(tk::LeftLeftEqual, hi::Operator);
 229 "%"    L C F(tk::Percent, hi::Operator);
 230 "%="   L C F(tk::PercentEqual, hi::Operator);
 231 "."    L C F(tk::Period, hi::Operator);
 232 "|"    L C F(tk::Pipe, hi::Operator);
 233 "|="   L C F(tk::PipeEqual, hi::Operator);
 234 "||"   L C F(tk::PipePipe, hi::Operator);
 235 "+"    L C F(tk::Plus, hi::Operator);
 236 "+="   L C F(tk::PlusEqual, hi::Operator);
 237 "++"   L C F(yylval->newline_ ? tk::PlusPlus_ : tk::PlusPlus, hi::Operator);
 238 ">"    L C F(tk::Right, hi::Operator);
 239 ">="   L C F(tk::RightEqual, hi::Operator);
 240 ">>"   L C F(tk::RightRight, hi::Operator);
 241 ">>="  L C F(tk::RightRightEqual, hi::Operator);
 242 ">>>"  L C F(tk::RightRightRight, hi::Operator);
 243 ">>>=" L C F(tk::RightRightRightEqual, hi::Operator);
 244 "*"    L C F(tk::Star, hi::Operator);
 245 "*="   L C F(tk::StarEqual, hi::Operator);
 246 "~"    L C F(tk::Tilde, hi::Operator);
 247
 248 <Div>"/"  L C F(tk::Slash, hi::Operator);
 249 <Div>"/=" L C F(tk::SlashEqual, hi::Operator);
 250
 251 ":"    L C F(tk::Colon, hi::Structure);
 252 ","    L C F(tk::Comma, hi::Structure);
 253 "?"    L C F(tk::Question, hi::Structure);
 254 ";"    L C F(tk::SemiColon, hi::Structure);
 255
 256 "("    L C F(tk::OpenParen, hi::Structure);
 257 ")"    L C F(tk::CloseParen, hi::Structure);
 258
 259 "{"    L C F(yyextra->no_.OpenBrace ? tk::OpenBrace__ : yylval->newline_ ? tk::OpenBrace_ : tk::OpenBrace, hi::Structure);
 260 "}"    L C F(tk::CloseBrace, hi::Structure);
 261
 262 "["    L C F(tk::OpenBracket, hi::Structure);
 263 "]"    L C F(tk::CloseBracket, hi::Structure);
 264
 265 "@error"          L C F(tk::AtError, hi::Error);
 266
 267 @begin Java
 268 "@class"          L C F(tk::AtClass, hi::Meta);
 269 @end
 270
 271 @begin C
 272 "typedef"         L C I(identifier, Identifier("typedef"), tk::Typedef, hi::Meta);
 273 "unsigned"        L C I(identifier, Identifier("unsigned"), tk::Unsigned, hi::Type);
 274 "signed"          L C I(identifier, Identifier("signed"), tk::Signed, hi::Type);
 275 @end
 276
 277 @begin C
 278 "@encode"         L C F(tk::AtEncode, hi::Meta);
 279 @end
 280
 281 @begin ObjectiveC
 282 "@end"            L C F(tk::AtEnd, hi::Meta);
 283 "@implementation" L C F(yyextra->no_.AtImplementation ? tk::AtImplementation_ : tk::AtImplementation, hi::Meta);
 284 "@import"         L C F(tk::AtImport, hi::Special);
 285 "@selector"       L C F(tk::AtSelector, hi::Meta);
 286
 287 "NULL"         L C I(identifier, Identifier("NULL"), tk::Identifier_, hi::Constant);
 288 "nil"          L C I(identifier, Identifier("nil"), tk::Identifier_, hi::Constant);
 289 "YES"          L C I(identifier, Identifier("YES"), tk::Yes, hi::Constant);
 290 "NO"           L C I(identifier, Identifier("NO"), tk::No, hi::Constant);
 291
 292 "bool"         L C I(identifier, Identifier("bool"), tk::Identifier_, hi::Type);
 293 "BOOL"         L C I(identifier, Identifier("BOOL"), tk::Identifier_, hi::Type);
 294 "id"           L C I(identifier, Identifier("id"), tk::Identifier_, hi::Type);
 295 "SEL"          L C I(identifier, Identifier("SEL"), tk::Identifier_, hi::Type);
 296 @end
 297
 298 "undefined"    L C I(identifier, Identifier("undefined"), tk::Identifier_, hi::Operator);
 299
 300 "false"        L C I(false, False(), tk::False, hi::Constant);
 301 "null"         L C I(null, Null(), tk::Null, hi::Constant);
 302 "true"         L C I(true, True(), tk::True, hi::Constant);
 303
 304 "auto"         L C I(word, Word("auto"), tk::Auto, hi::Meta);
 305 "break"        L R I(word, Word("break"), tk::Break, hi::Control);
 306 "case"         L C I(word, Word("case"), tk::Case, hi::Control);
 307 "catch"        L C I(word, Word("catch"), tk::Catch, hi::Control);
 308 "continue"     L R I(word, Word("continue"), tk::Continue, hi::Control);
 309 "default"      L C I(word, Word("default"), tk::Default, hi::Control);
 310 "delete"       L C I(word, Word("delete"), tk::Delete, hi::Operator);
 311 "do"           L C I(word, Word("do"), tk::Do, hi::Control);
 312 "else"         L C I(word, Word("else"), tk::Else, hi::Control);
 313 "finally"      L C I(word, Word("finally"), tk::Finally, hi::Control);
 314 "for"          L C I(word, Word("for"), tk::For, hi::Control);
 315 "function"     L C I(word, Word("function"), yyextra->no_.Function ? tk::Function_ : tk::Function, hi::Meta);
 316 "if"           L C I(word, Word("if"), tk::If, hi::Control);
 317 "in"           L C I(word, Word("in"), yyextra->in_.top() ? tk::In_ : tk::In, hi::Operator);
 318 "instanceof"   L C I(word, Word("instanceof"), tk::InstanceOf, hi::Operator);
 319 "new"          L C I(word, Word("new"), tk::New, hi::Operator);
 320 "return"       L R I(word, Word("return"), tk::Return, hi::Control);
 321 "switch"       L C I(word, Word("switch"), tk::Switch, hi::Control);
 322 "this"         L C I(this, This(), tk::This, hi::Constant);
 323 "throw"        L R I(word, Word("throw"), tk::Throw, hi::Control);
 324 "try"          L C I(word, Word("try"), tk::Try, hi::Control);
 325 "typeof"       L C I(word, Word("typeof"), tk::TypeOf, hi::Operator);
 326 "var"          L C I(word, Word("var"), tk::Var, hi::Meta);
 327 "void"         L C I(word, Word("void"), tk::Void, hi::Operator);
 328 "while"        L C I(word, Word("while"), tk::While, hi::Control);
 329 "with"         L C I(word, Word("with"), tk::With, hi::Control);
 330
 331 "debugger"     L C I(word, Word("debugger"), tk::Debugger, hi::Meta);
 332
 333 "const"        L C I(word, Word("const"), tk::Const, hi::Meta);
 334
 335 "class"        L C I(word, Word("class"), tk::Class, hi::Meta);
 336 "enum"         L C I(word, Word("enum"), tk::Enum, hi::Meta);
 337 "export"       L C I(word, Word("export"), tk::Export, hi::Meta);
 338 "extends"      L C I(word, Word("extends"), tk::Extends, hi::Meta);
 339 "import"       L C I(word, Word("import"), tk::Import, hi::Meta);
 340 "super"        L C I(word, Word("super"), tk::Super, hi::Constant);
 341
 342 "implements"   L C I(identifier, Identifier("implements"), tk::Implements, hi::Meta);
 343 "interface"    L C I(identifier, Identifier("interface"), tk::Interface, hi::Meta);
 344 "package"      L C I(identifier, Identifier("package"), tk::Package, hi::Meta);
 345 "private"      L C I(identifier, Identifier("private"), tk::Private, hi::Meta);
 346 "protected"    L C I(identifier, Identifier("protected"), tk::Protected, hi::Meta);
 347 "public"       L C I(identifier, Identifier("public"), tk::Public, hi::Meta);
 348 "static"       L C I(identifier, Identifier("static"), tk::Static, hi::Meta);
 349
 350 "abstract"     L C I(identifier, Identifier("abstract"), tk::Abstract, hi::Meta);
 351 "boolean"      L C I(identifier, Identifier("boolean"), tk::Boolean, hi::Type);
 352 "byte"         L C I(identifier, Identifier("byte"), tk::Byte, hi::Type);
 353 "char"         L C I(identifier, Identifier("char"), tk::Char, hi::Type);
 354 "double"       L C I(identifier, Identifier("double"), tk::Double, hi::Type);
 355 "final"        L C I(identifier, Identifier("final"), tk::Final, hi::Meta);
 356 "float"        L C I(identifier, Identifier("float"), tk::Float, hi::Type);
 357 "goto"         L C I(identifier, Identifier("goto"), tk::Goto, hi::Control);
 358 "int"          L C I(identifier, Identifier("int"), tk::Int, hi::Type);
 359 "long"         L C I(identifier, Identifier("long"), tk::Long, hi::Type);
 360 "native"       L C I(identifier, Identifier("native"), tk::Native, hi::Meta);
 361 "short"        L C I(identifier, Identifier("short"), tk::Short, hi::Type);
 362 "synchronized" L C I(identifier, Identifier("synchronized"), tk::Synchronized, hi::Meta);
 363 "throws"       L C I(identifier, Identifier("throws"), tk::Throws, hi::Meta);
 364 "transient"    L C I(identifier, Identifier("transient"), tk::Transient, hi::Meta);
 365 "volatile"     L C I(identifier, Identifier("volatile"), tk::Volatile, hi::Meta);
 366
 367 "let"          L C I(identifier, Identifier("let"), tk::Let, hi::Meta);
 368 "yield"        L C I(identifier, Identifier("yield"), tk::Yield, hi::Control);
 369
 370 "each"         L C I(identifier, Identifier("each"), tk::Each, hi::Control);
 371 "of"           L C I(identifier, Identifier("of"), tk::Of, hi::Operator);
 372
 373 @begin E4X
 374 "namespace"    L C I(identifier, Identifier("namespace"), tk::Namespace, hi::Meta);
 375 "xml"          L C I(identifier, Identifier("xml"), tk::XML, hi::Meta);
 376 @end
 377
 378 {IdentifierStart}{IdentifierPart}* L C I(identifier, Identifier(Y), tk::Identifier_, hi::Identifier);
 379
 380 (\.[0-9]+|(0|[1-9][0-9]*)(\.[0-9]*)?){Exponent}? L C I(number, Number(strtod(yytext, NULL)), tk::NumericLiteral, hi::Constant);
 381
 382 0[xX][0-9a-fA-F]+ L C I(number, Number(strtoull(yytext + 2, NULL, 16)), tk::NumericLiteral, hi::Constant);
 383 0[0-7]+ L C I(number, Number(strtoull(yytext + 1, NULL, 8)), tk::NumericLiteral, hi::Constant);
 384 0[bB][0-1]+ L C I(number, Number(strtoull(yytext + 2, NULL, 2)), tk::NumericLiteral, hi::Constant);
 385
 386 \"([^"\\\n]|{Escape})*\"|'([^'\\\n]|{Escape})*' L C {
 387     char *value(A char[yyleng]);
 388     char *local(value);
 389
 390     for (yy_size_t i(1), e(yyleng - 1); i != e; ++i) {
 391         char next(yytext[i]);
 392
 393         if (yytext[i] == '\\')
 394             switch (next = yytext[++i]) {
 395                 case '\n': continue;
 396                 case '\\': next = '\\'; break;
 397                 case '\'': next = '\''; break;
 398                 case '"': next = '"'; break;
 399                 case 'b': next = '\b'; break;
 400                 case 'f': next = '\f'; break;
 401                 case 'n': next = '\n'; break;
 402                 case 'r': next = '\r'; break;
 403                 case 't': next = '\t'; break;
 404                 case 'v': next = '\v'; break;
 405                 case '0': next = '\0'; break;
 406
 407                 case 'x':
 408                     next = H(yytext[i + 1]) << 4 | H(yytext[i + 2]);
 409                     i += 2;
 410                 break;
 411             }
 412
 413         *local++ = next;
 414     }
 415
 416     *local = '\0';
 417     I(string, String(value, local - value), tk::StringLiteral, hi::Constant);
 418 }
 419
 420 \r?\n|\r|\xe2\x80[\xa8\xa9] yylloc->end.lines(); yylloc->step(); N
 421
 422 [ \t] L
 423
 424 <<EOF>> if (yyextra->auto_) { yyextra->auto_ = false; F(tk::AutoComplete, hi::Nothing); } L yyterminate();
 425
 426 . L {
 427     CYDriver::Error error;
 428     error.location_ = *yylloc;
 429     error.message_ = "syntax error, unknown token";
 430     yyextra->errors_.push_back(error);
 431     yyterminate();
 432 }
 433
 434 %%
 435
 436 void CYDriver::ScannerInit() {
 437     cylex_init(&scanner_);
 438     cyset_extra(this, scanner_);
 439 }
 440
 441 void CYDriver::ScannerDestroy() {
 442     cylex_destroy(scanner_);
 443 }
 444
 445 CYDriver::Condition CYDriver::GetCondition() {
 446     switch (yy_top_state(scanner_)) {
 447         case RegExp:
 448             return RegExpCondition;
 449 @begin E4X
 450         case XMLContent:
 451             return XMLContentCondition;
 452         case XMLTag:
 453             return XMLTagCondition;
 454 @end
 455         default:
 456             _assert(false);
 457     }
 458 }
 459
 460 void CYDriver::SetCondition(Condition condition) {
 461     struct yyguts_t *yyg(reinterpret_cast<struct yyguts_t *>(scanner_));
 462
 463     switch (condition) {
 464         case RegExpCondition:
 465             BEGIN(RegExp);
 466             break;
 467 @begin E4X
 468         case XMLContentCondition:
 469             BEGIN(XMLContent);
 470             break;
 471         case XMLTagCondition:
 472             BEGIN(XMLTag);
 473             break;
 474 @end
 475         default:
 476             _assert(false);
 477     }
 478 }
 479
 480 void CYDriver::PushCondition(Condition condition) {
 481     switch (condition) {
 482         case RegExpCondition:
 483             yy_push_state(RegExp, scanner_);
 484             break;
 485 @begin E4X
 486         case XMLContentCondition:
 487             yy_push_state(XMLContent, scanner_);
 488             break;
 489         case XMLTagCondition:
 490             yy_push_state(XMLTag, scanner_);
 491             break;
 492 @end
 493         default:
 494             _assert(false);
 495     }
 496 }
 497
 498 void CYDriver::PopCondition() {
 499     yy_pop_state(scanner_);
 500 }
 501
 502 #if defined(__clang__)
 503 #pragma clang diagnostic pop
 504 #endif