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Issue 1142423003: Add tokens for null-aware operators (Closed) Base URL: https://github.com/dart-lang/sdk.git@master
Patch Set: Adding tokens for null-aware operators Created 5 years, 7 months ago
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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 #ifndef VM_TOKEN_H_ 5 #ifndef VM_TOKEN_H_
6 #define VM_TOKEN_H_ 6 #define VM_TOKEN_H_
7 7
8 #include "platform/assert.h" 8 #include "platform/assert.h"
9 9
10 namespace dart { 10 namespace dart {
11 11
12 // Operator precedence table 12 // Operator precedence table
13 // 13 //
14 // 13 multiplicative * / ~/ % 14 // 14 multiplicative * / ~/ %
15 // 12 additive + - 15 // 13 additive + -
16 // 11 shift << >> 16 // 12 shift << >>
17 // 10 bitwise and & 17 // 11 bitwise and &
18 // 9 bitwise xor ^ 18 // 10 bitwise xor ^
19 // 8 bitwise or | 19 // 9 bitwise or |
20 // 7 relational >= > <= < is as 20 // 8 relational >= > <= < is as
21 // 6 equality == != === !== 21 // 7 equality == != === !==
22 // 5 logical and && 22 // 6 logical and &&
23 // 4 logical or || 23 // 5 logical or ||
24 // 4 null check ??
24 // 3 conditional ? 25 // 3 conditional ?
25 // 2 assignment = *= /= ~/= %= += -= <<= >>= &= ^= |= 26 // 2 assignment = *= /= ~/= %= += -= <<= >>= &= ^= |= ??=
26 // 1 comma , 27 // 1 comma ,
27 28
28 29
29 // Token definitions. 30 // Token definitions.
30 // Some operator tokens appear in blocks, e.g. assignment operators. 31 // Some operator tokens appear in blocks, e.g. assignment operators.
31 // There is code that depends on the values within a block to be 32 // There is code that depends on the values within a block to be
32 // contiguous, and on the order of values. 33 // contiguous, and on the order of values.
33 #define DART_TOKEN_LIST(TOK) \ 34 #define DART_TOKEN_LIST(TOK) \
34 TOK(kEOS, "", 0, kNoAttribute) \ 35 TOK(kEOS, "", 0, kNoAttribute) \
35 \ 36 \
36 TOK(kLPAREN, "(", 0, kNoAttribute) \ 37 TOK(kLPAREN, "(", 0, kNoAttribute) \
37 TOK(kRPAREN, ")", 0, kNoAttribute) \ 38 TOK(kRPAREN, ")", 0, kNoAttribute) \
38 TOK(kLBRACK, "[", 0, kNoAttribute) \ 39 TOK(kLBRACK, "[", 0, kNoAttribute) \
39 TOK(kRBRACK, "]", 0, kNoAttribute) \ 40 TOK(kRBRACK, "]", 0, kNoAttribute) \
40 TOK(kLBRACE, "{", 0, kNoAttribute) \ 41 TOK(kLBRACE, "{", 0, kNoAttribute) \
41 TOK(kRBRACE, "}", 0, kNoAttribute) \ 42 TOK(kRBRACE, "}", 0, kNoAttribute) \
42 TOK(kARROW, "=>", 0, kNoAttribute) \ 43 TOK(kARROW, "=>", 0, kNoAttribute) \
43 TOK(kCOLON, ":", 0, kNoAttribute) \ 44 TOK(kCOLON, ":", 0, kNoAttribute) \
44 TOK(kSEMICOLON, ";", 0, kNoAttribute) \ 45 TOK(kSEMICOLON, ";", 0, kNoAttribute) \
45 TOK(kPERIOD, ".", 0, kNoAttribute) \ 46 TOK(kPERIOD, ".", 0, kNoAttribute) \
47 TOK(kQM_PERIOD, "?.", 0, kNoAttribute) \
46 TOK(kINCR, "++", 0, kNoAttribute) \ 48 TOK(kINCR, "++", 0, kNoAttribute) \
47 TOK(kDECR, "--", 0, kNoAttribute) \ 49 TOK(kDECR, "--", 0, kNoAttribute) \
48 \ 50 \
49 /* Assignment operators. */ \ 51 /* Assignment operators. */ \
50 /* Please update IsAssignmentOperator() if you make */ \ 52 /* Please update IsAssignmentOperator() if you make */ \
51 /* any changes to this block. */ \ 53 /* any changes to this block. */ \
52 TOK(kASSIGN, "=", 2, kNoAttribute) \ 54 TOK(kASSIGN, "=", 2, kNoAttribute) \
53 TOK(kASSIGN_OR, "|=", 2, kNoAttribute) \ 55 TOK(kASSIGN_OR, "|=", 2, kNoAttribute) \
54 TOK(kASSIGN_XOR, "^=", 2, kNoAttribute) \ 56 TOK(kASSIGN_XOR, "^=", 2, kNoAttribute) \
55 TOK(kASSIGN_AND, "&=", 2, kNoAttribute) \ 57 TOK(kASSIGN_AND, "&=", 2, kNoAttribute) \
56 TOK(kASSIGN_SHL, "<<=", 2, kNoAttribute) \ 58 TOK(kASSIGN_SHL, "<<=", 2, kNoAttribute) \
57 TOK(kASSIGN_SHR, ">>=", 2, kNoAttribute) \ 59 TOK(kASSIGN_SHR, ">>=", 2, kNoAttribute) \
58 TOK(kASSIGN_ADD, "+=", 2, kNoAttribute) \ 60 TOK(kASSIGN_ADD, "+=", 2, kNoAttribute) \
59 TOK(kASSIGN_SUB, "-=", 2, kNoAttribute) \ 61 TOK(kASSIGN_SUB, "-=", 2, kNoAttribute) \
60 TOK(kASSIGN_MUL, "*=", 2, kNoAttribute) \ 62 TOK(kASSIGN_MUL, "*=", 2, kNoAttribute) \
61 TOK(kASSIGN_TRUNCDIV, "~/=", 2, kNoAttribute) \ 63 TOK(kASSIGN_TRUNCDIV, "~/=", 2, kNoAttribute) \
62 TOK(kASSIGN_DIV, "/=", 2, kNoAttribute) \ 64 TOK(kASSIGN_DIV, "/=", 2, kNoAttribute) \
63 TOK(kASSIGN_MOD, "%=", 2, kNoAttribute) \ 65 TOK(kASSIGN_MOD, "%=", 2, kNoAttribute) \
66 /* Avoid trigraph ??= below. */ \
rmacnak 2015/05/20 23:42:43 => Avoid C preprocessor replacing trigraph ??= bel
hausner 2015/05/21 16:07:18 Will do in follow-up CL.
67 TOK(kASSIGN_COND, "?\?=", 2, kNoAttribute) \
64 \ 68 \
65 TOK(kCASCADE, "..", 2, kNoAttribute) \ 69 TOK(kCASCADE, "..", 2, kNoAttribute) \
66 \ 70 \
67 TOK(kCOMMA, ",", 1, kNoAttribute) \ 71 TOK(kCOMMA, ",", 1, kNoAttribute) \
68 TOK(kOR, "||", 4, kNoAttribute) \ 72 TOK(kOR, "||", 5, kNoAttribute) \
69 TOK(kAND, "&&", 5, kNoAttribute) \ 73 TOK(kAND, "&&", 6, kNoAttribute) \
70 TOK(kBIT_OR, "|", 8, kNoAttribute) \ 74 TOK(kBIT_OR, "|", 9, kNoAttribute) \
71 TOK(kBIT_XOR, "^", 9, kNoAttribute) \ 75 TOK(kBIT_XOR, "^", 10, kNoAttribute) \
72 TOK(kBIT_AND, "&", 10, kNoAttribute) \ 76 TOK(kBIT_AND, "&", 11, kNoAttribute) \
73 TOK(kBIT_NOT, "~", 0, kNoAttribute) \ 77 TOK(kBIT_NOT, "~", 0, kNoAttribute) \
74 \ 78 \
75 /* Shift operators. */ \ 79 /* Shift operators. */ \
76 TOK(kSHL, "<<", 11, kNoAttribute) \ 80 TOK(kSHL, "<<", 12, kNoAttribute) \
77 TOK(kSHR, ">>", 11, kNoAttribute) \ 81 TOK(kSHR, ">>", 12, kNoAttribute) \
78 \ 82 \
79 /* Additive operators. */ \ 83 /* Additive operators. */ \
80 TOK(kADD, "+", 12, kNoAttribute) \ 84 TOK(kADD, "+", 13, kNoAttribute) \
81 TOK(kSUB, "-", 12, kNoAttribute) \ 85 TOK(kSUB, "-", 13, kNoAttribute) \
82 \ 86 \
83 /* Multiplicative operators */ \ 87 /* Multiplicative operators */ \
84 TOK(kMUL, "*", 13, kNoAttribute) \ 88 TOK(kMUL, "*", 14, kNoAttribute) \
85 TOK(kDIV, "/", 13, kNoAttribute) \ 89 TOK(kDIV, "/", 14, kNoAttribute) \
86 TOK(kTRUNCDIV, "~/", 13, kNoAttribute) \ 90 TOK(kTRUNCDIV, "~/", 14, kNoAttribute) \
87 TOK(kMOD, "%", 13, kNoAttribute) \ 91 TOK(kMOD, "%", 14, kNoAttribute) \
88 \ 92 \
89 TOK(kNOT, "!", 0, kNoAttribute) \ 93 TOK(kNOT, "!", 0, kNoAttribute) \
90 TOK(kCONDITIONAL, "?", 3, kNoAttribute) \ 94 TOK(kCONDITIONAL, "?", 3, kNoAttribute) \
95 TOK(kIFNULL, "??", 4, kNoAttribute) \
91 \ 96 \
92 /* Equality operators. */ \ 97 /* Equality operators. */ \
93 /* Please update IsEqualityOperator() if you make */ \ 98 /* Please update IsEqualityOperator() if you make */ \
94 /* any changes to this block. */ \ 99 /* any changes to this block. */ \
95 TOK(kEQ, "==", 6, kNoAttribute) \ 100 TOK(kEQ, "==", 7, kNoAttribute) \
96 TOK(kNE, "!=", 6, kNoAttribute) \ 101 TOK(kNE, "!=", 7, kNoAttribute) \
97 TOK(kEQ_STRICT, "===", 6, kNoAttribute) \ 102 TOK(kEQ_STRICT, "===", 7, kNoAttribute) \
98 TOK(kNE_STRICT, "!==", 6, kNoAttribute) \ 103 TOK(kNE_STRICT, "!==", 7, kNoAttribute) \
99 \ 104 \
100 /* Relational operators. */ \ 105 /* Relational operators. */ \
101 /* Please update IsRelationalOperator() if you make */ \ 106 /* Please update IsRelationalOperator() if you make */ \
102 /* any changes to this block. */ \ 107 /* any changes to this block. */ \
103 TOK(kLT, "<", 7, kNoAttribute) \ 108 TOK(kLT, "<", 8, kNoAttribute) \
104 TOK(kGT, ">", 7, kNoAttribute) \ 109 TOK(kGT, ">", 8, kNoAttribute) \
105 TOK(kLTE, "<=", 7, kNoAttribute) \ 110 TOK(kLTE, "<=", 8, kNoAttribute) \
106 TOK(kGTE, ">=", 7, kNoAttribute) \ 111 TOK(kGTE, ">=", 8, kNoAttribute) \
107 \ 112 \
108 /* Internal token for !(expr is Type) negative type test operator */ \ 113 /* Internal token for !(expr is Type) negative type test operator */ \
109 TOK(kISNOT, "", 10, kNoAttribute) \ 114 TOK(kISNOT, "", 11, kNoAttribute) \
110 \ 115 \
111 TOK(kINDEX, "[]", 0, kNoAttribute) \ 116 TOK(kINDEX, "[]", 0, kNoAttribute) \
112 TOK(kASSIGN_INDEX, "[]=", 0, kNoAttribute) \ 117 TOK(kASSIGN_INDEX, "[]=", 0, kNoAttribute) \
113 TOK(kNEGATE, "unary-", 0, kNoAttribute) \ 118 TOK(kNEGATE, "unary-", 0, kNoAttribute) \
114 \ 119 \
115 TOK(kIDENT, "", 0, kNoAttribute) \ 120 TOK(kIDENT, "", 0, kNoAttribute) \
116 TOK(kSTRING, "", 0, kNoAttribute) \ 121 TOK(kSTRING, "", 0, kNoAttribute) \
117 TOK(kINTEGER, "", 0, kNoAttribute) \ 122 TOK(kINTEGER, "", 0, kNoAttribute) \
118 TOK(kDOUBLE, "", 0, kNoAttribute) \ 123 TOK(kDOUBLE, "", 0, kNoAttribute) \
119 \ 124 \
(...skipping 14 matching lines...) Expand all
134 \ 139 \
135 /* Support for optimized code */ \ 140 /* Support for optimized code */ \
136 TOK(kREM, "", 0, kNoAttribute) \ 141 TOK(kREM, "", 0, kNoAttribute) \
137 142
138 // List of keywords. The list must be alphabetically ordered. The 143 // List of keywords. The list must be alphabetically ordered. The
139 // keyword recognition code depends on the ordering. 144 // keyword recognition code depends on the ordering.
140 // If you add a keyword at the beginning or end of this list, make sure 145 // If you add a keyword at the beginning or end of this list, make sure
141 // to update kFirstKeyword and kLastKeyword below. 146 // to update kFirstKeyword and kLastKeyword below.
142 #define DART_KEYWORD_LIST(KW) \ 147 #define DART_KEYWORD_LIST(KW) \
143 KW(kABSTRACT, "abstract", 0, kPseudoKeyword) /* == kFirstKeyword */ \ 148 KW(kABSTRACT, "abstract", 0, kPseudoKeyword) /* == kFirstKeyword */ \
144 KW(kAS, "as", 10, kPseudoKeyword) \ 149 KW(kAS, "as", 11, kPseudoKeyword) \
145 KW(kASSERT, "assert", 10, kKeyword) \ 150 KW(kASSERT, "assert", 11, kKeyword) \
146 KW(kBREAK, "break", 0, kKeyword) \ 151 KW(kBREAK, "break", 0, kKeyword) \
147 KW(kCASE, "case", 0, kKeyword) \ 152 KW(kCASE, "case", 0, kKeyword) \
148 KW(kCATCH, "catch", 0, kKeyword) \ 153 KW(kCATCH, "catch", 0, kKeyword) \
149 KW(kCLASS, "class", 0, kKeyword) \ 154 KW(kCLASS, "class", 0, kKeyword) \
150 KW(kCONST, "const", 0, kKeyword) \ 155 KW(kCONST, "const", 0, kKeyword) \
151 KW(kCONTINUE, "continue", 0, kKeyword) \ 156 KW(kCONTINUE, "continue", 0, kKeyword) \
152 KW(kDEFAULT, "default", 0, kKeyword) \ 157 KW(kDEFAULT, "default", 0, kKeyword) \
153 KW(kDO, "do", 0, kKeyword) \ 158 KW(kDO, "do", 0, kKeyword) \
154 KW(kELSE, "else", 0, kKeyword) \ 159 KW(kELSE, "else", 0, kKeyword) \
155 KW(kENUM, "enum", 0, kKeyword) \ 160 KW(kENUM, "enum", 0, kKeyword) \
156 KW(kEXPORT, "export", 0, kPseudoKeyword) \ 161 KW(kEXPORT, "export", 0, kPseudoKeyword) \
157 KW(kEXTENDS, "extends", 0, kKeyword) \ 162 KW(kEXTENDS, "extends", 0, kKeyword) \
158 KW(kEXTERNAL, "external", 0, kPseudoKeyword) \ 163 KW(kEXTERNAL, "external", 0, kPseudoKeyword) \
159 KW(kFACTORY, "factory", 0, kPseudoKeyword) \ 164 KW(kFACTORY, "factory", 0, kPseudoKeyword) \
160 KW(kFALSE, "false", 0, kKeyword) \ 165 KW(kFALSE, "false", 0, kKeyword) \
161 KW(kFINAL, "final", 0, kKeyword) \ 166 KW(kFINAL, "final", 0, kKeyword) \
162 KW(kFINALLY, "finally", 0, kKeyword) \ 167 KW(kFINALLY, "finally", 0, kKeyword) \
163 KW(kFOR, "for", 0, kKeyword) \ 168 KW(kFOR, "for", 0, kKeyword) \
164 KW(kGET, "get", 0, kPseudoKeyword) \ 169 KW(kGET, "get", 0, kPseudoKeyword) \
165 KW(kIF, "if", 0, kKeyword) \ 170 KW(kIF, "if", 0, kKeyword) \
166 KW(kIMPLEMENTS, "implements", 0, kPseudoKeyword) \ 171 KW(kIMPLEMENTS, "implements", 0, kPseudoKeyword) \
167 KW(kIMPORT, "import", 0, kPseudoKeyword) \ 172 KW(kIMPORT, "import", 0, kPseudoKeyword) \
168 KW(kIN, "in", 0, kKeyword) \ 173 KW(kIN, "in", 0, kKeyword) \
169 KW(kIS, "is", 10, kKeyword) \ 174 KW(kIS, "is", 11, kKeyword) \
170 KW(kLIBRARY, "library", 0, kPseudoKeyword) \ 175 KW(kLIBRARY, "library", 0, kPseudoKeyword) \
171 KW(kNEW, "new", 0, kKeyword) \ 176 KW(kNEW, "new", 0, kKeyword) \
172 KW(kNULL, "null", 0, kKeyword) \ 177 KW(kNULL, "null", 0, kKeyword) \
173 KW(kOPERATOR, "operator", 0, kPseudoKeyword) \ 178 KW(kOPERATOR, "operator", 0, kPseudoKeyword) \
174 KW(kPART, "part", 0, kPseudoKeyword) \ 179 KW(kPART, "part", 0, kPseudoKeyword) \
175 KW(kRETHROW, "rethrow", 0, kKeyword) \ 180 KW(kRETHROW, "rethrow", 0, kKeyword) \
176 KW(kRETURN, "return", 0, kKeyword) \ 181 KW(kRETURN, "return", 0, kKeyword) \
177 KW(kSET, "set", 0, kPseudoKeyword) \ 182 KW(kSET, "set", 0, kPseudoKeyword) \
178 KW(kSTATIC, "static", 0, kPseudoKeyword) \ 183 KW(kSTATIC, "static", 0, kPseudoKeyword) \
179 KW(kSUPER, "super", 0, kKeyword) \ 184 KW(kSUPER, "super", 0, kKeyword) \
(...skipping 25 matching lines...) Expand all
205 kNoAttribute = 0, 210 kNoAttribute = 0,
206 kKeyword = 1 << 0, 211 kKeyword = 1 << 0,
207 kPseudoKeyword = 1 << 1, 212 kPseudoKeyword = 1 << 1,
208 }; 213 };
209 214
210 static const Kind kFirstKeyword = kABSTRACT; 215 static const Kind kFirstKeyword = kABSTRACT;
211 static const Kind kLastKeyword = kWITH; 216 static const Kind kLastKeyword = kWITH;
212 static const int kNumKeywords = kLastKeyword - kFirstKeyword + 1; 217 static const int kNumKeywords = kLastKeyword - kFirstKeyword + 1;
213 218
214 static bool IsAssignmentOperator(Kind tok) { 219 static bool IsAssignmentOperator(Kind tok) {
215 return kASSIGN <= tok && tok <= kASSIGN_MOD; 220 return kASSIGN <= tok && tok <= kASSIGN_COND;
216 } 221 }
217 222
218 static bool IsRelationalOperator(Kind tok) { 223 static bool IsRelationalOperator(Kind tok) {
219 return kLT <= tok && tok <= kGTE; 224 return kLT <= tok && tok <= kGTE;
220 } 225 }
221 226
222 static bool IsEqualityOperator(Kind tok) { 227 static bool IsEqualityOperator(Kind tok) {
223 return kEQ <= tok && tok <= kNE_STRICT; 228 return kEQ <= tok && tok <= kNE_STRICT;
224 } 229 }
225 230
(...skipping 94 matching lines...) Expand 10 before | Expand all | Expand 10 after
320 static const char* name_[]; 325 static const char* name_[];
321 static const char* tok_str_[]; 326 static const char* tok_str_[];
322 static const uint8_t precedence_[]; 327 static const uint8_t precedence_[];
323 static const Attribute attributes_[]; 328 static const Attribute attributes_[];
324 }; 329 };
325 330
326 331
327 } // namespace dart 332 } // namespace dart
328 333
329 #endif // VM_TOKEN_H_ 334 #endif // VM_TOKEN_H_
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