token.h.svn-base

Google浏览器V8内核代码

// Copyright 2006-2008 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
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//
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#ifndef V8_TOKEN_H_
#define V8_TOKEN_H_

namespace v8 { namespace internal {

// TOKEN_LIST takes a list of 3 macros M, all of which satisfy the
// same signature M(name, string, precedence), where name is the
// symbolic token name, string is the corresponding syntactic symbol
// (or NULL, for literals), and precedence is the precedence (or 0).
// The parameters are invoked for token categories as follows:
//
//   T: Non-keyword tokens
//   K: Keyword tokens
//   F: Future (reserved) keyword tokens

// IGNORE_TOKEN is a convenience macro that can be supplied as
// an argument (at any position) for a TOKEN_LIST call. It does
// nothing with tokens belonging to the respective category.

#define IGNORE_TOKEN(name, string, precedence)

#define TOKEN_LIST(T, K, F)                                             \
  /* End of source indicator. */                                        \
  T(EOS, "EOS", 0)                                                      \
                                                                        \
  /* Punctuators (ECMA-262, section 7.7, page 15). */                   \
  T(LPAREN, "(", 0)                                                     \
  T(RPAREN, ")", 0)                                                     \
  T(LBRACK, "[", 0)                                                     \
  T(RBRACK, "]", 0)                                                     \
  T(LBRACE, "{", 0)                                                     \
  T(RBRACE, "}", 0)                                                     \
  T(COLON, ":", 0)                                                      \
  T(SEMICOLON, ";", 0)                                                  \
  T(PERIOD, ".", 0)                                                     \
  T(CONDITIONAL, "?", 3)                                                \
  T(INC, "++", 0)                                                       \
  T(DEC, "--", 0)                                                       \
                                                                        \
  /* Assignment operators. */                                           \
  /* IsAssignmentOp() relies on this block of enum values */            \
  /* being contiguous and sorted in the same order! */                  \
  T(INIT_VAR, "=init_var", 2)  /* AST-use only. */                      \
  T(INIT_CONST, "=init_const", 2)  /* AST-use only. */                  \
  T(ASSIGN, "=", 2)                                                     \
  T(ASSIGN_BIT_OR, "|=", 2)                                             \
  T(ASSIGN_BIT_XOR, "^=", 2)                                            \
  T(ASSIGN_BIT_AND, "&=", 2)                                            \
  T(ASSIGN_SHL, "<<=", 2)                                               \
  T(ASSIGN_SAR, ">>=", 2)                                               \
  T(ASSIGN_SHR, ">>>=", 2)                                              \
  T(ASSIGN_ADD, "+=", 2)                                                \
  T(ASSIGN_SUB, "-=", 2)                                                \
  T(ASSIGN_MUL, "*=", 2)                                                \
  T(ASSIGN_DIV, "/=", 2)                                                \
  T(ASSIGN_MOD, "%=", 2)                                                \
                                                                        \
  /* Binary operators sorted by precedence. */                          \
  /* IsBinaryOp() relies on this block of enum values */                \
  /* being contiguous and sorted in the same order! */                  \
  T(COMMA, ",", 1)                                                      \
  T(OR, "||", 4)                                                        \
  T(AND, "&&", 5)                                                       \
  T(BIT_OR, "|", 6)                                                     \
  T(BIT_XOR, "^", 7)                                                    \
  T(BIT_AND, "&", 8)                                                    \
  T(SHL, "<<", 11)                                                      \
  T(SAR, ">>", 11)                                                      \
  T(SHR, ">>>", 11)                                                     \
  T(ADD, "+", 12)                                                       \
  T(SUB, "-", 12)                                                       \
  T(MUL, "*", 13)                                                       \
  T(DIV, "/", 13)                                                       \
  T(MOD, "%", 13)                                                       \
                                                                        \
  /* Compare operators sorted by precedence. */                         \
  /* IsCompareOp() relies on this block of enum values */               \
  /* being contiguous and sorted in the same order! */                  \
  T(EQ, "==", 9)                                                        \
  T(NE, "!=", 9)                                                        \
  T(EQ_STRICT, "===", 9)                                                \
  T(NE_STRICT, "!==", 9)                                                \
  T(LT, "<", 10)                                                        \
  T(GT, ">", 10)                                                        \
  T(LTE, "<=", 10)                                                      \
  T(GTE, ">=", 10)                                                      \
  K(INSTANCEOF, "instanceof", 10)                                       \
  K(IN, "in", 10)                                                       \
                                                                        \
  /* Unary operators. */                                                \
  /* IsUnaryOp() relies on this block of enum values */                 \
  /* being contiguous and sorted in the same order! */                  \
  T(NOT, "!", 0)                                                        \
  T(BIT_NOT, "~", 0)                                                    \
  K(DELETE, "delete", 0)                                                \
  K(TYPEOF, "typeof", 0)                                                \
  K(VOID, "void", 0)                                                    \
                                                                        \
  /* Keywords (ECMA-262, section 7.5.2, page 13). */                    \
  K(BREAK, "break", 0)                                                  \
  K(CASE, "case", 0)                                                    \
  K(CATCH, "catch", 0)                                                  \
  K(CONTINUE, "continue", 0)                                            \
  K(DEBUGGER, "debugger", 0)                                            \
  K(DEFAULT, "default", 0)                                              \
  /* DELETE */                                                          \
  K(DO, "do", 0)                                                        \
  K(ELSE, "else", 0)                                                    \
  K(FINALLY, "finally", 0)                                              \
  K(FOR, "for", 0)                                                      \
  K(FUNCTION, "function", 0)                                            \
  K(IF, "if", 0)                                                        \
  /* IN */                                                              \
  /* INSTANCEOF */                                                      \