parser/JSParser.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 JSParser_h
  27 #define JSParser_h
  28
  29 namespace JSC {
  30
  31 class ExecState;
  32 class FunctionParameters;
  33 class Identifier;
  34 class JSGlobalData;
  35 class SourceCode;
  36
  37 enum {
  38     UnaryOpTokenFlag = 64,
  39     KeywordTokenFlag = 128,
  40     BinaryOpTokenPrecedenceShift = 8,
  41     BinaryOpTokenAllowsInPrecedenceAdditionalShift = 4,
  42     BinaryOpTokenPrecedenceMask = 15 << BinaryOpTokenPrecedenceShift,
  43 };
  44
  45 #define BINARY_OP_PRECEDENCE(prec) (((prec) << BinaryOpTokenPrecedenceShift) | ((prec) << (BinaryOpTokenPrecedenceShift + BinaryOpTokenAllowsInPrecedenceAdditionalShift)))
  46 #define IN_OP_PRECEDENCE(prec) ((prec) << (BinaryOpTokenPrecedenceShift + BinaryOpTokenAllowsInPrecedenceAdditionalShift))
  47
  48 enum JSTokenType {
  49     NULLTOKEN = KeywordTokenFlag,
  50     TRUETOKEN,
  51     FALSETOKEN,
  52     BREAK,
  53     CASE,
  54     DEFAULT,
  55     FOR,
  56     NEW,
  57     VAR,
  58     CONSTTOKEN,
  59     CONTINUE,
  60     FUNCTION,
  61     RETURN,
  62     IF,
  63     THISTOKEN,
  64     DO,
  65     WHILE,
  66     SWITCH,
  67     WITH,
  68     RESERVED,
  69     THROW,
  70     TRY,
  71     CATCH,
  72     FINALLY,
  73     DEBUGGER,
  74     ELSE,
  75     OPENBRACE = 0,
  76     CLOSEBRACE,
  77     OPENPAREN,
  78     CLOSEPAREN,
  79     OPENBRACKET,
  80     CLOSEBRACKET,
  81     COMMA,
  82     QUESTION,
  83     NUMBER,
  84     IDENT,
  85     STRING,
  86     SEMICOLON,
  87     COLON,
  88     DOT,
  89     ERRORTOK,
  90     EOFTOK,
  91     EQUAL,
  92     PLUSEQUAL,
  93     MINUSEQUAL,
  94     MULTEQUAL,
  95     DIVEQUAL,
  96     LSHIFTEQUAL,
  97     RSHIFTEQUAL,
  98     URSHIFTEQUAL,
  99     ANDEQUAL,
 100     MODEQUAL,
 101     XOREQUAL,
 102     OREQUAL,
 103     LastUntaggedToken,
 104
 105     // Begin tagged tokens
 106     PLUSPLUS = 0 | UnaryOpTokenFlag,
 107     MINUSMINUS = 1 | UnaryOpTokenFlag,
 108     EXCLAMATION = 2 | UnaryOpTokenFlag,
 109     TILDE = 3 | UnaryOpTokenFlag,
 110     AUTOPLUSPLUS = 4 | UnaryOpTokenFlag,
 111     AUTOMINUSMINUS = 5 | UnaryOpTokenFlag,
 112     TYPEOF = 6 | UnaryOpTokenFlag | KeywordTokenFlag,
 113     VOIDTOKEN = 7 | UnaryOpTokenFlag | KeywordTokenFlag,
 114     DELETETOKEN = 8 | UnaryOpTokenFlag | KeywordTokenFlag,
 115     OR = 0 | BINARY_OP_PRECEDENCE(1),
 116     AND = 1 | BINARY_OP_PRECEDENCE(2),
 117     BITOR = 2 | BINARY_OP_PRECEDENCE(3),
 118     BITXOR = 3 | BINARY_OP_PRECEDENCE(4),
 119     BITAND = 4 | BINARY_OP_PRECEDENCE(5),
 120     EQEQ = 5 | BINARY_OP_PRECEDENCE(6),
 121     NE = 6 | BINARY_OP_PRECEDENCE(6),
 122     STREQ = 7 | BINARY_OP_PRECEDENCE(6),
 123     STRNEQ = 8 | BINARY_OP_PRECEDENCE(6),
 124     LT = 9 | BINARY_OP_PRECEDENCE(7),
 125     GT = 10 | BINARY_OP_PRECEDENCE(7),
 126     LE = 11 | BINARY_OP_PRECEDENCE(7),
 127     GE = 12 | BINARY_OP_PRECEDENCE(7),
 128     INSTANCEOF = 13 | BINARY_OP_PRECEDENCE(7) | KeywordTokenFlag,
 129     INTOKEN = 14 | IN_OP_PRECEDENCE(7) | KeywordTokenFlag,
 130     LSHIFT = 15 | BINARY_OP_PRECEDENCE(8),
 131     RSHIFT = 16 | BINARY_OP_PRECEDENCE(8),
 132     URSHIFT = 17 | BINARY_OP_PRECEDENCE(8),
 133     PLUS = 18 | BINARY_OP_PRECEDENCE(9) | UnaryOpTokenFlag,
 134     MINUS = 19 | BINARY_OP_PRECEDENCE(9) | UnaryOpTokenFlag,
 135     TIMES = 20 | BINARY_OP_PRECEDENCE(10),
 136     DIVIDE = 21 | BINARY_OP_PRECEDENCE(10),
 137     MOD = 22 | BINARY_OP_PRECEDENCE(10)
 138 };
 139
 140 union JSTokenData {
 141     int intValue;
 142     double doubleValue;
 143     const Identifier* ident;
 144 };
 145
 146 struct JSTokenInfo {
 147     JSTokenInfo() : line(0) {}
 148     int line;
 149     int startOffset;
 150     int endOffset;
 151 };
 152
 153 struct JSToken {
 154     JSTokenType m_type;
 155     JSTokenData m_data;
 156     JSTokenInfo m_info;
 157 };
 158
 159 enum JSParserStrictness { JSParseNormal, JSParseStrict };
 160 enum JSParserMode { JSParseProgramCode, JSParseFunctionCode };
 161
 162 const char* jsParse(JSGlobalData*, FunctionParameters*, JSParserStrictness, JSParserMode, const SourceCode*);
 163 }
 164 #endif // JSParser_h