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Side by Side Diff: pkg/fasta/lib/src/builder/prefix_builder.dart

Issue 2629063005: Fasta builders. (Closed)
Patch Set: Address review comments. Created 3 years, 11 months ago
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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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