Changeset 05f8761
- Timestamp:
- Sep 11, 2024, 4:49:17 PM (4 weeks ago)
- Branches:
- master
- Children:
- cdf7d43
- Parents:
- 1665ee5 (diff), 5b95e67 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
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src/Parser/ExpressionNode.cpp
r1665ee5 r05f8761 9 9 // Author : Peter A. Buhr 10 10 // Created On : Sat May 16 13:17:07 2015 11 // Last Modified By : Andrew Beach12 // Last Modified On : Fri Aug 23 10:22:00202413 // Update Count : 108 811 // Last Modified By : Peter A. Buhr 12 // Last Modified On : Wed Sep 11 16:28:06 2024 13 // Update Count : 1089 14 14 // 15 15 … … 461 461 } // build_constantChar 462 462 463 static bool isoctal( char ch ) { 464 return ('0' <= ch && ch <= '7'); 465 } 466 467 static bool ishexadecimal( char ch ) { 468 return (('0' <= ch && ch <= '9') 469 || ('a' <= ch && ch <= 'f') 470 || ('A' <= ch && ch <= 'F')); 471 } 472 473 // A "sequence" is the series of characters in a character/string literal 474 // that becomes a single character value in the runtime value. 475 static size_t sequenceLength( const std::string & str, size_t pos ) { 476 // Most "sequences" are just a single character, filter those out: 477 if ( '\\' != str[pos] ) return 1; 478 switch ( str[pos + 1] ) { 479 // Simple Escape Sequence (\_ where _ is one of the following): 480 case '\'': case '\"': case '?': case '\\': 481 case 'a': case 'b': case 'f': case 'n': case 'r': case 't': case 'v': 482 // GCC Escape Sequence (as simple, just some different letters): 483 case 'e': 484 return 2; 485 // Numeric Escape Sequence (\___ where _ is 1-3 octal digits): 486 case '0': case '1': case '2': case '3': 487 case '4': case '5': case '6': case '7': 488 return ( !isoctal( str[pos + 2] ) ) ? 2 : 489 ( !isoctal( str[pos + 3] ) ) ? 3 : 4; 490 // Numeric Escape Sequence (\x_ where _ is 1 or more hexadecimal digits): 491 case 'x': { 492 size_t length = 2; 493 while ( ishexadecimal( str[pos + length] ) ) ++length; 494 return length; 495 } 496 // Universal Character Name (\u____ where _ is 4 decimal digits): 497 case 'u': 498 return 6; 499 // Universal Character Name (\U________ where _ is 8 decimal digits): 500 case 'U': 501 return 10; 502 default: 503 assertf( false, "Unknown escape sequence (start %c).", str[pos] ); 504 return 1; 505 } 506 } 507 463 508 ast::Expr * build_constantStr( 464 509 const CodeLocation & location, … … 485 530 strtype = new ast::BasicType( ast::BasicKind::Char ); 486 531 } // switch 532 533 // The dimension value of the type is equal to the number of "sequences" 534 // not including the openning and closing quotes in the literal plus 1 535 // for the implicit null terminator. 536 size_t dimension = 1; 537 for ( size_t pos = 1 ; pos < str.size() - 1 ; 538 pos += sequenceLength( str, pos ) ) { 539 dimension += 1; 540 } 541 487 542 ast::ArrayType * at = new ast::ArrayType( 488 543 strtype, 489 // Length is adjusted: +1 for '\0' and -2 for '"' 490 ast::ConstantExpr::from_ulong( location, str.size() + 1 - 2 ), 544 ast::ConstantExpr::from_ulong( location, dimension ), 491 545 ast::FixedLen, 492 546 ast::DynamicDim );
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