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概要[]
- gcc-4.1.0/libcpp/include/cpplib.hにて定義
- オペレータとトークンの表
実装[]
48 /* The first three groups, apart from '=', can appear in preprocessor
49 expressions (+= and -= are used to indicate unary + and - resp.).
50 This allows a lookup table to be implemented in _cpp_parse_expr.
51
52 The first group, to CPP_LAST_EQ, can be immediately followed by an
53 '='. The lexer needs operators ending in '=', like ">>=", to be in
54 the same order as their counterparts without the '=', like ">>". */
55
56 #define TTYPE_TABLE \
- オペレータ
57 OP(EQ, "=") \
58 OP(NOT, "!") \
59 OP(GREATER, ">") /* compare */ \
60 OP(LESS, "<") \
61 OP(PLUS, "+") /* math */ \
62 OP(MINUS, "-") \
63 OP(MULT, "*") \
64 OP(DIV, "/") \
65 OP(MOD, "%") \
66 OP(AND, "&") /* bit ops */ \
67 OP(OR, "|") \
68 OP(XOR, "^") \
69 OP(RSHIFT, ">>") \
70 OP(LSHIFT, "<<") \
71 OP(MIN, "<?") /* extension */ \
72 OP(MAX, ">?") \
73 \
74 OP(COMPL, "~") \
75 OP(AND_AND, "&&") /* logical */ \
76 OP(OR_OR, "||") \
77 OP(QUERY, "?") \
78 OP(COLON, ":") \
79 OP(COMMA, ",") /* grouping */ \
80 OP(OPEN_PAREN, "(") \
81 OP(CLOSE_PAREN, ")") \
82 TK(EOF, NONE) \
83 OP(EQ_EQ, "==") /* compare */ \
84 OP(NOT_EQ, "!=") \
85 OP(GREATER_EQ, ">=") \
86 OP(LESS_EQ, "<=") \
87 \
88 /* These two are unary + / - in preprocessor expressions. */ \
89 OP(PLUS_EQ, "+=") /* math */ \
90 OP(MINUS_EQ, "-=") \
91 \
92 OP(MULT_EQ, "*=") \
93 OP(DIV_EQ, "/=") \
94 OP(MOD_EQ, "%=") \
95 OP(AND_EQ, "&=") /* bit ops */ \
96 OP(OR_EQ, "|=") \
97 OP(XOR_EQ, "^=") \
98 OP(RSHIFT_EQ, ">>=") \
99 OP(LSHIFT_EQ, "<<=") \
100 OP(MIN_EQ, "<?=") /* extension */ \
101 OP(MAX_EQ, ">?=") \
102 /* Digraphs together, beginning with CPP_FIRST_DIGRAPH. */ \
103 OP(HASH, "#") /* digraphs */ \
104 OP(PASTE, "##") \
105 OP(OPEN_SQUARE, "[") \
106 OP(CLOSE_SQUARE, "]") \
107 OP(OPEN_BRACE, "{") \
108 OP(CLOSE_BRACE, "}") \
109 /* The remainder of the punctuation. Order is not significant. */ \
110 OP(SEMICOLON, ";") /* structure */ \
111 OP(ELLIPSIS, "...") \
112 OP(PLUS_PLUS, "++") /* increment */ \
113 OP(MINUS_MINUS, "--") \
114 OP(DEREF, "->") /* accessors */ \
115 OP(DOT, ".") \
116 OP(SCOPE, "::") \
117 OP(DEREF_STAR, "->*") \
118 OP(DOT_STAR, ".*") \
119 OP(ATSIGN, "@") /* used in Objective-C */ \
120 \
- トークン
121 TK(NAME, IDENT) /* word */ \
122 TK(AT_NAME, IDENT) /* @word - Objective-C */ \
123 TK(NUMBER, LITERAL) /* 34_be+ta */ \
124 \
125 TK(CHAR, LITERAL) /* 'char' */ \
126 TK(WCHAR, LITERAL) /* L'char' */ \
127 TK(OTHER, LITERAL) /* stray punctuation */ \
128 \
129 TK(STRING, LITERAL) /* "string" */ \
130 TK(WSTRING, LITERAL) /* L"string" */ \
131 TK(OBJC_STRING, LITERAL) /* @"string" - Objective-C */ \
132 TK(HEADER_NAME, LITERAL) /* <stdio.h> in #include */ \
133 \
134 TK(COMMENT, LITERAL) /* Only if output comments. */ \
135 /* SPELL_LITERAL happens to DTRT. */ \
136 TK(MACRO_ARG, NONE) /* Macro argument. */ \
137 TK(PRAGMA, NONE) /* Only if deferring pragmas */ \
138 TK(PADDING, NONE) /* Whitespace for -E. */