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ParserTokens.h
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/*
* Copyright (C) 2010, 2013 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef ParserTokens_h
#define ParserTokens_h
#include "ParserModes.h"
#include <limits.h>
#include <stdint.h>
namespace JSC {
class Identifier;
enum {
UnaryOpTokenFlag = 64,
KeywordTokenFlag = 128,
BinaryOpTokenPrecedenceShift = 8,
BinaryOpTokenAllowsInPrecedenceAdditionalShift = 4,
BinaryOpTokenPrecedenceMask = 15 << BinaryOpTokenPrecedenceShift,
ErrorTokenFlag = 1 << (BinaryOpTokenAllowsInPrecedenceAdditionalShift + BinaryOpTokenPrecedenceShift + 7),
UnterminatedErrorTokenFlag = ErrorTokenFlag << 1
};
#define BINARY_OP_PRECEDENCE(prec) (((prec) << BinaryOpTokenPrecedenceShift) | ((prec) << (BinaryOpTokenPrecedenceShift + BinaryOpTokenAllowsInPrecedenceAdditionalShift)))
#define IN_OP_PRECEDENCE(prec) ((prec) << (BinaryOpTokenPrecedenceShift + BinaryOpTokenAllowsInPrecedenceAdditionalShift))
enum JSTokenType {
NULLTOKEN = KeywordTokenFlag,
TRUETOKEN,
FALSETOKEN,
BREAK,
CASE,
DEFAULT,
FOR,
NEW,
VAR,
CONSTTOKEN,
CONTINUE,
FUNCTION,
RETURN,
IF,
THISTOKEN,
DO,
WHILE,
SWITCH,
WITH,
RESERVED,
RESERVED_IF_STRICT,
THROW,
TRY,
CATCH,
FINALLY,
DEBUGGER,
ELSE,
OPENBRACE = 0,
CLOSEBRACE,
OPENPAREN,
CLOSEPAREN,
OPENBRACKET,
CLOSEBRACKET,
COMMA,
QUESTION,
NUMBER,
IDENT,
STRING,
SEMICOLON,
COLON,
DOT,
EOFTOK,
EQUAL,
PLUSEQUAL,
MINUSEQUAL,
MULTEQUAL,
DIVEQUAL,
LSHIFTEQUAL,
RSHIFTEQUAL,
URSHIFTEQUAL,
ANDEQUAL,
MODEQUAL,
XOREQUAL,
OREQUAL,
DOTDOTDOT,
LastUntaggedToken,
// Begin tagged tokens
PLUSPLUS = 0 | UnaryOpTokenFlag,
MINUSMINUS = 1 | UnaryOpTokenFlag,
EXCLAMATION = 2 | UnaryOpTokenFlag,
TILDE = 3 | UnaryOpTokenFlag,
AUTOPLUSPLUS = 4 | UnaryOpTokenFlag,
AUTOMINUSMINUS = 5 | UnaryOpTokenFlag,
TYPEOF = 6 | UnaryOpTokenFlag | KeywordTokenFlag,
VOIDTOKEN = 7 | UnaryOpTokenFlag | KeywordTokenFlag,
DELETETOKEN = 8 | UnaryOpTokenFlag | KeywordTokenFlag,
OR = 0 | BINARY_OP_PRECEDENCE(1),
AND = 1 | BINARY_OP_PRECEDENCE(2),
BITOR = 2 | BINARY_OP_PRECEDENCE(3),
BITXOR = 3 | BINARY_OP_PRECEDENCE(4),
BITAND = 4 | BINARY_OP_PRECEDENCE(5),
EQEQ = 5 | BINARY_OP_PRECEDENCE(6),
NE = 6 | BINARY_OP_PRECEDENCE(6),
STREQ = 7 | BINARY_OP_PRECEDENCE(6),
STRNEQ = 8 | BINARY_OP_PRECEDENCE(6),
LT = 9 | BINARY_OP_PRECEDENCE(7),
GT = 10 | BINARY_OP_PRECEDENCE(7),
LE = 11 | BINARY_OP_PRECEDENCE(7),
GE = 12 | BINARY_OP_PRECEDENCE(7),
INSTANCEOF = 13 | BINARY_OP_PRECEDENCE(7) | KeywordTokenFlag,
INTOKEN = 14 | IN_OP_PRECEDENCE(7) | KeywordTokenFlag,
LSHIFT = 15 | BINARY_OP_PRECEDENCE(8),
RSHIFT = 16 | BINARY_OP_PRECEDENCE(8),
URSHIFT = 17 | BINARY_OP_PRECEDENCE(8),
PLUS = 18 | BINARY_OP_PRECEDENCE(9) | UnaryOpTokenFlag,
MINUS = 19 | BINARY_OP_PRECEDENCE(9) | UnaryOpTokenFlag,
TIMES = 20 | BINARY_OP_PRECEDENCE(10),
DIVIDE = 21 | BINARY_OP_PRECEDENCE(10),
MOD = 22 | BINARY_OP_PRECEDENCE(10),
ERRORTOK = 0 | ErrorTokenFlag,
UNTERMINATED_IDENTIFIER_ESCAPE_ERRORTOK = 0 | ErrorTokenFlag | UnterminatedErrorTokenFlag,
INVALID_IDENTIFIER_ESCAPE_ERRORTOK = 1 | ErrorTokenFlag,
UNTERMINATED_IDENTIFIER_UNICODE_ESCAPE_ERRORTOK = 2 | ErrorTokenFlag | UnterminatedErrorTokenFlag,
INVALID_IDENTIFIER_UNICODE_ESCAPE_ERRORTOK = 3 | ErrorTokenFlag,
UNTERMINATED_MULTILINE_COMMENT_ERRORTOK = 4 | ErrorTokenFlag | UnterminatedErrorTokenFlag,
UNTERMINATED_NUMERIC_LITERAL_ERRORTOK = 5 | ErrorTokenFlag | UnterminatedErrorTokenFlag,
INVALID_OCTAL_NUMBER_ERRORTOK = 6 | ErrorTokenFlag | UnterminatedErrorTokenFlag,
INVALID_NUMERIC_LITERAL_ERRORTOK = 7 | ErrorTokenFlag,
UNTERMINATED_STRING_LITERAL_ERRORTOK = 8 | ErrorTokenFlag | UnterminatedErrorTokenFlag,
INVALID_STRING_LITERAL_ERRORTOK = 9 | ErrorTokenFlag,
};
struct JSTextPosition {
JSTextPosition() : line(0), offset(0), lineStartOffset(0) { }
JSTextPosition(int _line, int _offset, int _lineStartOffset) : line(_line), offset(_offset), lineStartOffset(_lineStartOffset) { }
JSTextPosition(const JSTextPosition& other) : line(other.line), offset(other.offset), lineStartOffset(other.lineStartOffset) { }
JSTextPosition operator+(int adjustment) const { return JSTextPosition(line, offset + adjustment, lineStartOffset); }
JSTextPosition operator+(unsigned adjustment) const { return *this + static_cast<int>(adjustment); }
JSTextPosition operator-(int adjustment) const { return *this + (- adjustment); }
JSTextPosition operator-(unsigned adjustment) const { return *this + (- static_cast<int>(adjustment)); }
operator int() const { return offset; }
int line;
int offset;
int lineStartOffset;
};
union JSTokenData {
struct {
uint32_t line;
uint32_t offset;
uint32_t lineStartOffset;
};
double doubleValue;
const Identifier* ident;
};
struct JSTokenLocation {
JSTokenLocation() : line(0), lineStartOffset(0), startOffset(0) { }
JSTokenLocation(const JSTokenLocation& location)
{
line = location.line;
lineStartOffset = location.lineStartOffset;
startOffset = location.startOffset;
endOffset = location.endOffset;
}
int line;
unsigned lineStartOffset;
unsigned startOffset;
unsigned endOffset;
};
struct JSToken {
JSTokenType m_type;
JSTokenData m_data;
JSTokenLocation m_location;
JSTextPosition m_startPosition;
JSTextPosition m_endPosition;
};
} // namespace JSC
#endif // ParserTokens_h