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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 library fasta.scanner.abstract_scanner; | 5 library fasta.scanner.abstract_scanner; |
6 | 6 |
7 import '../scanner.dart' show | 7 import '../scanner.dart' show |
8 ErrorToken, | 8 ErrorToken, |
9 Scanner, | 9 Scanner, |
10 buildUnexpectedCharacterToken; | 10 buildUnexpectedCharacterToken; |
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234 if ($a <= next && next <= $z) { | 234 if ($a <= next && next <= $z) { |
235 if (identical($r, next)) { | 235 if (identical($r, next)) { |
236 return tokenizeRawStringKeywordOrIdentifier(next); | 236 return tokenizeRawStringKeywordOrIdentifier(next); |
237 } | 237 } |
238 return tokenizeKeywordOrIdentifier(next, true); | 238 return tokenizeKeywordOrIdentifier(next, true); |
239 } | 239 } |
240 | 240 |
241 if (($A <= next && next <= $Z) || | 241 if (($A <= next && next <= $Z) || |
242 identical(next, $_) || | 242 identical(next, $_) || |
243 identical(next, $$)) { | 243 identical(next, $$)) { |
244 return tokenizeKeywordOrIdentifier(next, true); | 244 return tokenizeIdentifier(next, scanOffset, true); |
245 } | 245 } |
246 | 246 |
247 if (identical(next, $LT)) { | 247 if (identical(next, $LT)) { |
248 return tokenizeLessThan(next); | 248 return tokenizeLessThan(next); |
249 } | 249 } |
250 | 250 |
251 if (identical(next, $GT)) { | 251 if (identical(next, $GT)) { |
252 return tokenizeGreaterThan(next); | 252 return tokenizeGreaterThan(next); |
253 } | 253 } |
254 | 254 |
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801 int start = scanOffset; | 801 int start = scanOffset; |
802 next = advance(); | 802 next = advance(); |
803 return tokenizeString(next, start, true); | 803 return tokenizeString(next, start, true); |
804 } | 804 } |
805 return tokenizeKeywordOrIdentifier(next, true); | 805 return tokenizeKeywordOrIdentifier(next, true); |
806 } | 806 } |
807 | 807 |
808 int tokenizeKeywordOrIdentifier(int next, bool allowDollar) { | 808 int tokenizeKeywordOrIdentifier(int next, bool allowDollar) { |
809 KeywordState state = KeywordState.KEYWORD_STATE; | 809 KeywordState state = KeywordState.KEYWORD_STATE; |
810 int start = scanOffset; | 810 int start = scanOffset; |
811 // We allow a leading capital character. | |
812 if ($A <= next && next <= $Z) { | |
813 state = state.nextCapital(next); | |
814 next = advance(); | |
815 } else if ($a <= next && next <= $z){ | |
816 // Do the first next call outside the loop to avoid an additional test | |
817 // and to make the loop monomorphic. | |
818 state = state.next(next); | |
819 next = advance(); | |
820 } | |
821 while (state != null && $a <= next && next <= $z) { | 811 while (state != null && $a <= next && next <= $z) { |
822 state = state.next(next); | 812 state = state.next(next); |
823 next = advance(); | 813 next = advance(); |
824 } | 814 } |
825 if (state == null || state.keyword == null) { | 815 if (state == null || state.keyword == null) { |
826 return tokenizeIdentifier(next, start, allowDollar); | 816 return tokenizeIdentifier(next, start, allowDollar); |
827 } | 817 } |
828 if (($A <= next && next <= $Z) || | 818 if (($A <= next && next <= $Z) || |
829 ($0 <= next && next <= $9) || | 819 ($0 <= next && next <= $9) || |
830 identical(next, $_) || | 820 identical(next, $_) || |
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948 } | 938 } |
949 if (identical(next, $EOF)) return next; | 939 if (identical(next, $EOF)) return next; |
950 next = advance(); // Move past the $STX. | 940 next = advance(); // Move past the $STX. |
951 beginToken(); // The string interpolation suffix starts here. | 941 beginToken(); // The string interpolation suffix starts here. |
952 return next; | 942 return next; |
953 } | 943 } |
954 | 944 |
955 int tokenizeInterpolatedIdentifier(int next) { | 945 int tokenizeInterpolatedIdentifier(int next) { |
956 appendPrecedenceToken(STRING_INTERPOLATION_IDENTIFIER_INFO); | 946 appendPrecedenceToken(STRING_INTERPOLATION_IDENTIFIER_INFO); |
957 | 947 |
958 if ($a <= next && next <= $z || | 948 if ($a <= next && next <= $z) { |
959 $A <= next && next <= $Z || | |
960 identical(next, $_)) { | |
961 beginToken(); // The identifier starts here. | 949 beginToken(); // The identifier starts here. |
962 next = tokenizeKeywordOrIdentifier(next, false); | 950 next = tokenizeKeywordOrIdentifier(next, false); |
| 951 } else if (($A <= next && next <= $Z) || identical(next, $_)) { |
| 952 beginToken(); // The identifier starts here. |
| 953 next = tokenizeIdentifier(next, scanOffset, false); |
963 } else { | 954 } else { |
964 unterminated(r'$', shouldAdvance: false); | 955 unterminated(r'$', shouldAdvance: false); |
965 } | 956 } |
966 beginToken(); // The string interpolation suffix starts here. | 957 beginToken(); // The string interpolation suffix starts here. |
967 return next; | 958 return next; |
968 } | 959 } |
969 | 960 |
970 int tokenizeSingleLineRawString(int next, int quoteChar, int start) { | 961 int tokenizeSingleLineRawString(int next, int quoteChar, int start) { |
971 bool asciiOnly = true; | 962 bool asciiOnly = true; |
972 while (next != $EOF) { | 963 while (next != $EOF) { |
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1167 | 1158 |
1168 PrecedenceInfo closeBraceInfoFor(BeginGroupToken begin) { | 1159 PrecedenceInfo closeBraceInfoFor(BeginGroupToken begin) { |
1169 return const { | 1160 return const { |
1170 '(': CLOSE_PAREN_INFO, | 1161 '(': CLOSE_PAREN_INFO, |
1171 '[': CLOSE_SQUARE_BRACKET_INFO, | 1162 '[': CLOSE_SQUARE_BRACKET_INFO, |
1172 '{': CLOSE_CURLY_BRACKET_INFO, | 1163 '{': CLOSE_CURLY_BRACKET_INFO, |
1173 '<': GT_INFO, | 1164 '<': GT_INFO, |
1174 r'${': CLOSE_CURLY_BRACKET_INFO, | 1165 r'${': CLOSE_CURLY_BRACKET_INFO, |
1175 }[begin.value]; | 1166 }[begin.value]; |
1176 } | 1167 } |
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