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| 1 // Copyright (c) 2016, 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 library fasta.prefix_builder; |
| 6 |
| 7 import 'builder.dart' show |
| 8 Builder, |
| 9 LibraryBuilder, |
| 10 MemberBuilder; |
| 11 |
| 12 import 'package:kernel/ast.dart' show |
| 13 Member; |
| 14 |
| 15 import '../dill/dill_member_builder.dart' show |
| 16 DillMemberBuilder; |
| 17 |
| 18 import '../errors.dart' show |
| 19 internalError; |
| 20 |
| 21 class PrefixBuilder extends Builder { |
| 22 final String name; |
| 23 |
| 24 final Map<String, Builder> exports; |
| 25 |
| 26 final LibraryBuilder parent; |
| 27 |
| 28 PrefixBuilder(this.name, this.exports, this.parent); |
| 29 |
| 30 Member findTopLevelMember(String name) { |
| 31 // TODO(ahe): Move this to KernelPrefixBuilder. |
| 32 Builder builder = exports[name]; |
| 33 if (builder == null) { |
| 34 // TODO(ahe): Report error? |
| 35 print("${this.name} has no member named $name"); |
| 36 } |
| 37 if (builder is DillMemberBuilder) { |
| 38 return builder.member.isInstanceMember |
| 39 ? internalError("Unexpected instance member in export scope") |
| 40 : builder.member; |
| 41 } else if (builder is MemberBuilder) { |
| 42 return builder.target; |
| 43 } else { |
| 44 return null; |
| 45 } |
| 46 } |
| 47 |
| 48 Builder combineAmbiguousImport(String name, Builder other, |
| 49 LibraryBuilder library) { |
| 50 if (other is PrefixBuilder) { |
| 51 /// Handles the case where the same prefix is used for different imports. |
| 52 other.exports.forEach((String name, Builder member) { |
| 53 Builder existing = exports[name]; |
| 54 if (existing != null) { |
| 55 member = existing.combineAmbiguousImport(name, member, library); |
| 56 } |
| 57 exports[name] = member; |
| 58 }); |
| 59 return this; |
| 60 } |
| 61 return super.combineAmbiguousImport(name, other, library); |
| 62 } |
| 63 } |
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