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| 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | |
| 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. | |
| 4 | |
| 5 part of scanner; | |
| 6 | |
| 7 class PartialParser extends Parser { | |
| 8 PartialParser(Listener listener) : super(listener); | |
| 9 | |
| 10 Token parseClassBody(Token token) => skipClassBody(token); | |
| 11 | |
| 12 Token fullParseClassBody(Token token) => super.parseClassBody(token); | |
| 13 | |
| 14 Token parseExpression(Token token) => skipExpression(token); | |
| 15 | |
| 16 Token parseArgumentsOpt(Token token) { | |
| 17 // This method is overridden for two reasons: | |
| 18 // 1. Avoid generating events for arguments. | |
| 19 // 2. Avoid calling skip expression for each argument (which doesn't work). | |
| 20 if (optional('(', token)) { | |
| 21 BeginGroupToken begin = token; | |
| 22 return begin.endGroup.next; | |
| 23 } else { | |
| 24 return token; | |
| 25 } | |
| 26 } | |
| 27 | |
| 28 Token skipExpression(Token token) { | |
| 29 while (true) { | |
| 30 final kind = token.kind; | |
| 31 final value = token.stringValue; | |
| 32 if ((identical(kind, EOF_TOKEN)) || | |
| 33 (identical(value, ';')) || | |
| 34 (identical(value, ',')) || | |
| 35 (identical(value, '}')) || | |
| 36 (identical(value, ')')) || | |
| 37 (identical(value, ']'))) { | |
| 38 break; | |
| 39 } | |
| 40 if (identical(value, '=') || | |
| 41 identical(value, '?') || | |
| 42 identical(value, ':')) { | |
| 43 var nextValue = token.next.stringValue; | |
| 44 if (identical(nextValue, 'const')) { | |
| 45 token = token.next; | |
| 46 nextValue = token.next.stringValue; | |
| 47 } | |
| 48 if (identical(nextValue, '{')) { | |
| 49 // Handle cases like this: | |
| 50 // class Foo { | |
| 51 // var map; | |
| 52 // Foo() : map = {}; | |
| 53 // Foo.x() : map = true ? {} : {}; | |
| 54 // } | |
| 55 BeginGroupToken begin = token.next; | |
| 56 token = (begin.endGroup != null) ? begin.endGroup : token; | |
| 57 token = token.next; | |
| 58 continue; | |
| 59 } | |
| 60 if (identical(nextValue, '<')) { | |
| 61 // Handle cases like this: | |
| 62 // class Foo { | |
| 63 // var map; | |
| 64 // Foo() : map = <String, Foo>{}; | |
| 65 // Foo.x() : map = true ? <String, Foo>{} : <String, Foo>{}; | |
| 66 // } | |
| 67 BeginGroupToken begin = token.next; | |
| 68 token = (begin.endGroup != null) ? begin.endGroup : token; | |
| 69 token = token.next; | |
| 70 if (identical(token.stringValue, '{')) { | |
| 71 begin = token; | |
| 72 token = (begin.endGroup != null) ? begin.endGroup : token; | |
| 73 token = token.next; | |
| 74 } | |
| 75 continue; | |
| 76 } | |
| 77 } | |
| 78 if (!mayParseFunctionExpressions && identical(value, '{')) { | |
| 79 break; | |
| 80 } | |
| 81 if (token is BeginGroupToken) { | |
| 82 BeginGroupToken begin = token; | |
| 83 token = (begin.endGroup != null) ? begin.endGroup : token; | |
| 84 } else if (token is ErrorToken) { | |
| 85 listener.reportErrorToken(token); | |
| 86 } | |
| 87 token = token.next; | |
| 88 } | |
| 89 return token; | |
| 90 } | |
| 91 | |
| 92 Token skipClassBody(Token token) { | |
| 93 if (!optional('{', token)) { | |
| 94 return listener.expectedClassBodyToSkip(token); | |
| 95 } | |
| 96 BeginGroupToken beginGroupToken = token; | |
| 97 Token endGroup = beginGroupToken.endGroup; | |
| 98 if (endGroup == null) { | |
| 99 return listener.unmatched(beginGroupToken); | |
| 100 } else if (!identical(endGroup.kind, $CLOSE_CURLY_BRACKET)) { | |
| 101 return listener.unmatched(beginGroupToken); | |
| 102 } | |
| 103 return endGroup; | |
| 104 } | |
| 105 | |
| 106 Token skipAsyncModifier(Token token) { | |
| 107 String value = token.stringValue; | |
| 108 if (identical(value, 'async')) { | |
| 109 token = token.next; | |
| 110 value = token.stringValue; | |
| 111 | |
| 112 if (identical(value, '*')) { | |
| 113 token = token.next; | |
| 114 } | |
| 115 } else if (identical(value, 'sync')) { | |
| 116 token = token.next; | |
| 117 value = token.stringValue; | |
| 118 | |
| 119 if (identical(value, '*')) { | |
| 120 token = token.next; | |
| 121 } | |
| 122 } | |
| 123 return token; | |
| 124 } | |
| 125 | |
| 126 Token parseFunctionBody(Token token, bool isExpression, bool allowAbstract) { | |
| 127 assert(!isExpression); | |
| 128 token = skipAsyncModifier(token); | |
| 129 String value = token.stringValue; | |
| 130 if (identical(value, ';')) { | |
| 131 if (!allowAbstract) { | |
| 132 listener.reportError(token, MessageKind.BODY_EXPECTED); | |
| 133 } | |
| 134 listener.handleNoFunctionBody(token); | |
| 135 } else { | |
| 136 if (identical(value, '=>')) { | |
| 137 token = parseExpression(token.next); | |
| 138 expectSemicolon(token); | |
| 139 } else if (value == '=') { | |
| 140 token = parseRedirectingFactoryBody(token); | |
| 141 expectSemicolon(token); | |
| 142 } else { | |
| 143 token = skipBlock(token); | |
| 144 } | |
| 145 listener.skippedFunctionBody(token); | |
| 146 } | |
| 147 return token; | |
| 148 } | |
| 149 | |
| 150 Token parseFormalParameters(Token token) => skipFormals(token); | |
| 151 | |
| 152 Token skipFormals(Token token) { | |
| 153 listener.beginOptionalFormalParameters(token); | |
| 154 if (!optional('(', token)) { | |
| 155 if (optional(';', token)) { | |
| 156 listener.recoverableError(token, "expected '('"); | |
| 157 return token; | |
| 158 } | |
| 159 return listener.unexpected(token); | |
| 160 } | |
| 161 BeginGroupToken beginGroupToken = token; | |
| 162 Token endToken = beginGroupToken.endGroup; | |
| 163 listener.endFormalParameters(0, token, endToken); | |
| 164 return endToken.next; | |
| 165 } | |
| 166 } | |
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Chromium Code Reviews
Issue 694353007:
Move dart2js from sdk/lib/_internal/compiler to pkg/compiler (Closed)
Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart