JavaScriptCore-1218.34.tar.gz

[apple/javascriptcore.git] / parser / ParserTokens.h

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#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,
    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,
};

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;
};

} // namespace JSC

#endif // ParserTokens_h