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Side by Side Diff: pkg/compiler/lib/src/scanner/scanner_task.dart

Issue 693183006: Revert "Move dart2js from sdk/lib/_internal/compiler to pkg/compiler" (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Created 6 years, 1 month ago
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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
3 // BSD-style license that can be found in the LICENSE file.
4
5 part of scanner;
6
7 class ScannerTask extends CompilerTask {
8 ScannerTask(Compiler compiler) : super(compiler);
9 String get name => 'Scanner';
10
11 void scanLibrary(LibraryElement library) {
12 CompilationUnitElement compilationUnit = library.entryCompilationUnit;
13 String canonicalUri = library.canonicalUri.toString();
14 String resolvedUri = compilationUnit.script.readableUri.toString();
15 if (canonicalUri == resolvedUri) {
16 compiler.log("Scanning library $canonicalUri");
17 } else {
18 compiler.log("Scanning library $canonicalUri ($resolvedUri)");
19 }
20 scan(compilationUnit);
21 }
22
23 void scan(CompilationUnitElement compilationUnit) {
24 measure(() {
25 scanElements(compilationUnit);
26 });
27 }
28
29 void scanElements(CompilationUnitElement compilationUnit) {
30 Script script = compilationUnit.script;
31 Token tokens = new Scanner(script.file,
32 includeComments: compiler.preserveComments).tokenize();
33 if (compiler.preserveComments) {
34 tokens = compiler.processAndStripComments(tokens);
35 }
36 compiler.dietParser.dietParse(compilationUnit, tokens);
37 }
38
39 /**
40 * Returns the tokens for the [source].
41 *
42 * The [StringScanner] implementation works on strings that end with a '0'
43 * value ('\x00'). If [source] does not end with '0', the string is copied
44 * before scanning.
45 */
46 Token tokenize(String source) {
47 return measure(() {
48 return new StringScanner.fromString(source, includeComments: false)
49 .tokenize();
50 });
51 }
52 }
53
54 class DietParserTask extends CompilerTask {
55 DietParserTask(Compiler compiler) : super(compiler);
56 final String name = 'Diet Parser';
57
58 dietParse(CompilationUnitElement compilationUnit, Token tokens) {
59 measure(() {
60 Function idGenerator = compiler.getNextFreeClassId;
61 ElementListener listener =
62 new ElementListener(compiler, compilationUnit, idGenerator);
63 PartialParser parser = new PartialParser(listener);
64 parser.parseUnit(tokens);
65 });
66 }
67 }
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