parser/ParserTokens.h

   1 /*
   2  * Copyright (C) 2010 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  23  * THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef ParserTokens_h
  27 #define ParserTokens_h
  28
  29 namespace JSC {
  30
  31 class Identifier;
  32
  33 enum {
  34     UnaryOpTokenFlag = 64,
  35     KeywordTokenFlag = 128,
  36     BinaryOpTokenPrecedenceShift = 8,
  37     BinaryOpTokenAllowsInPrecedenceAdditionalShift = 4,
  38     BinaryOpTokenPrecedenceMask = 15 << BinaryOpTokenPrecedenceShift,
  39 };
  40
  41 #define BINARY_OP_PRECEDENCE(prec) (((prec) << BinaryOpTokenPrecedenceShift) | ((prec) << (BinaryOpTokenPrecedenceShift + BinaryOpTokenAllowsInPrecedenceAdditionalShift)))
  42 #define IN_OP_PRECEDENCE(prec) ((prec) << (BinaryOpTokenPrecedenceShift + BinaryOpTokenAllowsInPrecedenceAdditionalShift))
  43
  44 enum JSTokenType {
  45     NULLTOKEN = KeywordTokenFlag,
  46     TRUETOKEN,
  47     FALSETOKEN,
  48     BREAK,
  49     CASE,
  50     DEFAULT,
  51     FOR,
  52     NEW,
  53     VAR,
  54     CONSTTOKEN,
  55     CONTINUE,
  56     FUNCTION,
  57     RETURN,
  58     IF,
  59     THISTOKEN,
  60     DO,
  61     WHILE,
  62     SWITCH,
  63     WITH,
  64     RESERVED,
  65     RESERVED_IF_STRICT,
  66     THROW,
  67     TRY,
  68     CATCH,
  69     FINALLY,
  70     DEBUGGER,
  71     ELSE,
  72     OPENBRACE = 0,
  73     CLOSEBRACE,
  74     OPENPAREN,
  75     CLOSEPAREN,
  76     OPENBRACKET,
  77     CLOSEBRACKET,
  78     COMMA,
  79     QUESTION,
  80     NUMBER,
  81     IDENT,
  82     STRING,
  83     SEMICOLON,
  84     COLON,
  85     DOT,
  86     ERRORTOK,
  87     EOFTOK,
  88     EQUAL,
  89     PLUSEQUAL,
  90     MINUSEQUAL,
  91     MULTEQUAL,
  92     DIVEQUAL,
  93     LSHIFTEQUAL,
  94     RSHIFTEQUAL,
  95     URSHIFTEQUAL,
  96     ANDEQUAL,
  97     MODEQUAL,
  98     XOREQUAL,
  99     OREQUAL,
 100     LastUntaggedToken,
 101
 102     // Begin tagged tokens
 103     PLUSPLUS = 0 | UnaryOpTokenFlag,
 104     MINUSMINUS = 1 | UnaryOpTokenFlag,
 105     EXCLAMATION = 2 | UnaryOpTokenFlag,
 106     TILDE = 3 | UnaryOpTokenFlag,
 107     AUTOPLUSPLUS = 4 | UnaryOpTokenFlag,
 108     AUTOMINUSMINUS = 5 | UnaryOpTokenFlag,
 109     TYPEOF = 6 | UnaryOpTokenFlag | KeywordTokenFlag,
 110     VOIDTOKEN = 7 | UnaryOpTokenFlag | KeywordTokenFlag,
 111     DELETETOKEN = 8 | UnaryOpTokenFlag | KeywordTokenFlag,
 112     OR = 0 | BINARY_OP_PRECEDENCE(1),
 113     AND = 1 | BINARY_OP_PRECEDENCE(2),
 114     BITOR = 2 | BINARY_OP_PRECEDENCE(3),
 115     BITXOR = 3 | BINARY_OP_PRECEDENCE(4),
 116     BITAND = 4 | BINARY_OP_PRECEDENCE(5),
 117     EQEQ = 5 | BINARY_OP_PRECEDENCE(6),
 118     NE = 6 | BINARY_OP_PRECEDENCE(6),
 119     STREQ = 7 | BINARY_OP_PRECEDENCE(6),
 120     STRNEQ = 8 | BINARY_OP_PRECEDENCE(6),
 121     LT = 9 | BINARY_OP_PRECEDENCE(7),
 122     GT = 10 | BINARY_OP_PRECEDENCE(7),
 123     LE = 11 | BINARY_OP_PRECEDENCE(7),
 124     GE = 12 | BINARY_OP_PRECEDENCE(7),
 125     INSTANCEOF = 13 | BINARY_OP_PRECEDENCE(7) | KeywordTokenFlag,
 126     INTOKEN = 14 | IN_OP_PRECEDENCE(7) | KeywordTokenFlag,
 127     LSHIFT = 15 | BINARY_OP_PRECEDENCE(8),
 128     RSHIFT = 16 | BINARY_OP_PRECEDENCE(8),
 129     URSHIFT = 17 | BINARY_OP_PRECEDENCE(8),
 130     PLUS = 18 | BINARY_OP_PRECEDENCE(9) | UnaryOpTokenFlag,
 131     MINUS = 19 | BINARY_OP_PRECEDENCE(9) | UnaryOpTokenFlag,
 132     TIMES = 20 | BINARY_OP_PRECEDENCE(10),
 133     DIVIDE = 21 | BINARY_OP_PRECEDENCE(10),
 134     MOD = 22 | BINARY_OP_PRECEDENCE(10)
 135 };
 136
 137 union JSTokenData {
 138     int intValue;
 139     double doubleValue;
 140     const Identifier* ident;
 141 };
 142
 143 struct JSTokenInfo {
 144     JSTokenInfo() : line(0) { }
 145     int line;
 146     int startOffset;
 147     int endOffset;
 148 };
 149
 150 struct JSToken {
 151     JSTokenType m_type;
 152     JSTokenData m_data;
 153     JSTokenInfo m_info;
 154 };
 155
 156 enum JSParserStrictness { JSParseNormal, JSParseStrict };
 157 enum JSParserMode { JSParseProgramCode, JSParseFunctionCode };
 158
 159 }
 160
 161
 162 #endif // ParserTokens_h