antonm@google.com
6de27953f4
R=ahe@google.com Review URL: https://chromiumcodereview.appspot.com//10662054 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@9173 260f80e4-7a28-3924-810f-c04153c831b5
85 lines
3.2 KiB
Dart
85 lines
3.2 KiB
Dart
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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class ValidatorListener implements DiagnosticListener {
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final SourceFile sourceFile;
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ValidatorListener(this.sourceFile);
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void cancel([String reason, node, token, instruction, element]) {
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assert(token !== null);
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SourceSpan.withCharacterOffsets(token, token, (beginOffset, endOffset) {
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String errorMessage =
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sourceFile.getLocationMessage(reason, beginOffset, endOffset, true,
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(s) => s /* no color */);
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print(errorMessage);
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});
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throw new CompilerCancelledException(reason);
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}
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void log(message) {}
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}
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/**
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* Checks result's of [Node] unparse.
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*/
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class UnparseValidator extends CompilerTask {
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final bool validateUnparse;
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String get name() => "Unparse validator";
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UnparseValidator(Compiler compiler, this.validateUnparse) : super(compiler);
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void checkFunction(PartialFunctionElement originalFunction) {
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FunctionExpression originalNode = originalFunction.parseNode(compiler);
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String unparsed = originalNode.unparse();
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Token newTokens = new StringScanner(unparsed).tokenize();
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// Find the getOrSet token.
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// TODO(ahe): This is to frigging complicated. Simplify it.
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Parser parser = new Parser(new Listener());
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Token getOrSet =
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parser.findGetOrSet(parser.parseModifiers(newTokens));
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// TODO(ahe): This is also too frigging complicated.
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Script originalScript = originalFunction.getCompilationUnit().script;
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String name = SourceSpan.withCharacterOffsets(
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originalFunction.beginToken, originalFunction.endToken,
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(beginOffset, endOffset) =>
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'synthesized:${originalScript.name}#$beginOffset:$endOffset');
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SourceFile synthesizedSourceFile = new SourceFile(name, unparsed);
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Script synthesizedScript =
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new Script(originalScript.uri, synthesizedSourceFile);
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LibraryElement lib = new LibraryElement(synthesizedScript);
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lib.canUseNative = originalFunction.getLibrary().canUseNative;
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NodeListener listener =
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new NodeListener(new ValidatorListener(synthesizedSourceFile), lib);
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parser = new Parser(listener);
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parser.parseFunction(newTokens, getOrSet);
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FunctionExpression newNode = listener.popNode();
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// TODO(antonm): add Node comparison.
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}
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void check(Element element) {
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if (!validateUnparse) return;
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if (element is PartialFunctionElement) {
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checkFunction(element);
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} else if (element.isGenerativeConstructor()) {
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assert(element is FunctionElement);
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// Generative constructors parse to very special function expressions.
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// Handle them when classes are properly handled.
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} else if (element.isField() || element is AbstractFieldElement) {
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assert(element is VariableElement || element is AbstractFieldElement);
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// Fields are just names with possible initialization expressions.
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// Nothing to care about for now.
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} else if (element is VoidElement) {
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// Nothing to do here.
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} else {
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compiler.cancel('Cannot handle $element');
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}
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}
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}
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