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Unified Diff: pkg/fletchc/lib/incremental/diff.dart

Issue 1659163007: Rename fletch -> dartino (Closed) Base URL: https://github.com/dartino/sdk.git@master
Patch Set: address comments Created 4 years, 11 months ago
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Index: pkg/fletchc/lib/incremental/diff.dart
diff --git a/pkg/fletchc/lib/incremental/diff.dart b/pkg/fletchc/lib/incremental/diff.dart
deleted file mode 100644
index a2161d6687b49714ce89079376497d65807e8a45..0000000000000000000000000000000000000000
--- a/pkg/fletchc/lib/incremental/diff.dart
+++ /dev/null
@@ -1,158 +0,0 @@
-// Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-library fletchc.incremental.diff;
-
-import 'package:compiler/src/elements/elements.dart' show
- AbstractFieldElement,
- ClassElement,
- CompilationUnitElement,
- Element,
- ElementCategory,
- FunctionElement,
- LibraryElement,
- ScopeContainerElement;
-
-import 'package:compiler/src/elements/modelx.dart' as modelx;
-
-import 'package:compiler/src/elements/modelx.dart' show
- DeclarationSite;
-
-import 'package:compiler/src/tokens/token_constants.dart' show
- EOF_TOKEN,
- IDENTIFIER_TOKEN,
- KEYWORD_TOKEN;
-
-import 'package:compiler/src/tokens/token.dart' show
- ErrorToken,
- Token;
-
-import 'package:compiler/src/parser/partial_elements.dart' show
- PartialClassElement,
- PartialElement;
-
-import 'fletchc_incremental.dart' show
- IncrementalCompilationFailed;
-
-class Difference {
- final DeclarationSite before;
- final DeclarationSite after;
-
- /// Records the position of first difference between [before] and [after]. If
- /// either [before] or [after] are null, [token] is null.
- Token token;
-
- Difference(this.before, this.after) {
- if (before == after) {
- throw '[before] and [after] are the same.';
- }
- }
-
- String toString() {
- if (before == null) return 'Added($after)';
- if (after == null) return 'Removed($before)';
- return 'Modified($after -> $before)';
- }
-}
-
-void checkCanComputeDifference(modelx.ElementX element) {
- if (element.isMixinApplication) {
- // TODO(ahe): issue 91
- throw new IncrementalCompilationFailed(
- "Mixin applications not supported: $element");
- }
- if (element.isClass) {
- modelx.ClassElementX cls = element;
- if (cls.isEnumClass) {
- throw new IncrementalCompilationFailed("Enums not supported: $element");
- }
- }
- if (element.declarationSite == null && !element.isSynthesized) {
- throw new IncrementalCompilationFailed(
- "Unable to compute diff for $element");
- }
-}
-
-List<Difference> computeDifference(
- ScopeContainerElement before,
- ScopeContainerElement after) {
- Map<String, DeclarationSite> beforeMap = <String, DeclarationSite>{};
- before.forEachLocalMember((modelx.ElementX element) {
- checkCanComputeDifference(element);
- DeclarationSite site = element.declarationSite;
- assert(site != null || element.isSynthesized);
- if (!element.isSynthesized) {
- beforeMap[element.name] = site;
- }
- });
- List<Difference> modifications = <Difference>[];
- List<Difference> potentiallyChanged = <Difference>[];
- after.forEachLocalMember((modelx.ElementX element) {
- checkCanComputeDifference(element);
- DeclarationSite existing = beforeMap.remove(element.name);
- if (existing == null) {
- if (!element.isSynthesized) {
- modifications.add(new Difference(null, element.declarationSite));
- }
- } else {
- potentiallyChanged.add(new Difference(existing, element.declarationSite));
- }
- });
-
- modifications.addAll(
- beforeMap.values.map(
- (DeclarationSite site) => new Difference(site, null)));
-
- modifications.addAll(
- potentiallyChanged.where(areDifferentElements));
-
- return modifications;
-}
-
-bool areDifferentElements(Difference diff) {
- DeclarationSite before = diff.before;
- DeclarationSite after = diff.after;
- if (before is PartialElement && after is PartialElement) {
- Token beforeToken = before.beginToken;
- Token afterToken = after.beginToken;
- Token stop = before.endToken;
- int beforeKind = beforeToken.kind;
- int afterKind = afterToken.kind;
- while (beforeKind != EOF_TOKEN && afterKind != EOF_TOKEN) {
-
- if (beforeKind != afterKind) {
- diff.token = afterToken;
- return true;
- }
-
- if (beforeToken is! ErrorToken && afterToken is! ErrorToken) {
- if (beforeToken.value != afterToken.value) {
- diff.token = afterToken;
- return true;
- }
- }
-
- if (beforeToken == stop) {
- diff.token = afterToken;
- // We didn't find a difference, and normally that would mean that the
- // element hasn't changed. However, for elements with members, the
- // situation is more tricky. For example, consider a class that never
- // has any changes to its header (everything before the first `{`). The
- // tokens of this class aren't patched up if one of its members
- // change. So we can't actually look at the tokens of the class to see
- // if one of its members changed. Instead, we must say that the class
- // changed, and then look at its members one by one.
- return before is ScopeContainerElement;
- }
-
- beforeToken = beforeToken.next;
- afterToken = afterToken.next;
- beforeKind = beforeToken.kind;
- afterKind = afterToken.kind;
- }
- return beforeKind != afterKind;
- }
- print("$before isn't a PartialElement");
- return true;
-}
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