| /******************************************************************************* |
| * Copyright (c) 2008, 2012 IBM Wind River Systems, Inc. and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Markus Schorn - Initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.cdt.internal.core.dom.parser.cpp; |
| |
| import org.eclipse.cdt.core.dom.ast.ASTVisitor; |
| import org.eclipse.cdt.core.dom.ast.IASTDeclSpecifier; |
| import org.eclipse.cdt.core.dom.ast.IASTDeclarator; |
| import org.eclipse.cdt.core.dom.ast.IASTNode; |
| import org.eclipse.cdt.core.dom.ast.IASTParameterDeclaration; |
| import org.eclipse.cdt.core.dom.ast.IASTPointerOperator; |
| import org.eclipse.cdt.core.dom.ast.IType; |
| import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTDeclarator; |
| import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTFunctionDeclarator; |
| import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTParameterDeclaration; |
| import org.eclipse.cdt.core.dom.ast.cpp.ICPPParameterPackType; |
| import org.eclipse.cdt.internal.core.dom.parser.ASTAmbiguousNode; |
| import org.eclipse.cdt.internal.core.dom.parser.ASTNode; |
| import org.eclipse.cdt.internal.core.dom.parser.IASTAmbiguityParent; |
| import org.eclipse.cdt.internal.core.dom.parser.IASTAmbiguousParameterDeclaration; |
| import org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.CPPTemplates; |
| import org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.CPPVisitor; |
| import org.eclipse.core.runtime.Assert; |
| |
| /** |
| * Handles ambiguities for ellipsis in parameter declaration. |
| * <br> |
| * template<typename... T> void function(T ...); // is T a parameter pack? |
| */ |
| public class CPPASTAmbiguousParameterDeclaration extends ASTAmbiguousNode |
| implements IASTAmbiguousParameterDeclaration, ICPPASTParameterDeclaration { |
| private ICPPASTParameterDeclaration fParameterDecl; |
| |
| public CPPASTAmbiguousParameterDeclaration(ICPPASTParameterDeclaration decl) { |
| fParameterDecl= decl; |
| } |
| |
| @Override |
| public void addParameterDeclaration(IASTParameterDeclaration d) { |
| assert false; |
| } |
| |
| @Override |
| protected final IASTNode doResolveAmbiguity(ASTVisitor resolver) { |
| final IASTAmbiguityParent owner= (IASTAmbiguityParent) getParent(); |
| |
| // Setup the ast to use the alternative |
| owner.replace(this, fParameterDecl); |
| fParameterDecl.accept(resolver); |
| |
| IType t= CPPVisitor.createType(fParameterDecl, true); |
| if (!(t instanceof ICPPParameterPackType) || |
| !CPPTemplates.containsParameterPack(((ICPPParameterPackType) t).getType())) { |
| final ICPPASTDeclarator dtor = fParameterDecl.getDeclarator(); |
| dtor.setDeclaresParameterPack(false); |
| adjustOffsets(dtor); |
| ((ICPPASTFunctionDeclarator) fParameterDecl.getParent()).setVarArgs(true); |
| } |
| return fParameterDecl; |
| } |
| |
| private void adjustOffsets(final ICPPASTDeclarator dtor) { |
| IASTPointerOperator[] ptrOps= dtor.getPointerOperators(); |
| final ASTNode asNode = (ASTNode) dtor; |
| if (ptrOps.length > 0) { |
| final ASTNode first = (ASTNode) ptrOps[0]; |
| final ASTNode last = (ASTNode) ptrOps[ptrOps.length - 1]; |
| asNode.setOffsetAndLength(first.getOffset(), last.getOffset() + last.getLength()); |
| } else { |
| asNode.setOffsetAndLength(0, 0); |
| } |
| } |
| |
| @Override |
| public IASTParameterDeclaration[] getParameterDeclarations() { |
| return new IASTParameterDeclaration[] { fParameterDecl }; |
| } |
| |
| @Override |
| public IASTNode[] getNodes() { |
| return getParameterDeclarations(); |
| } |
| |
| @Override |
| public IASTDeclSpecifier getDeclSpecifier() { |
| return fParameterDecl.getDeclSpecifier(); |
| } |
| |
| @Override |
| public ICPPASTDeclarator getDeclarator() { |
| return fParameterDecl.getDeclarator(); |
| } |
| |
| @Override |
| public void setDeclSpecifier(IASTDeclSpecifier declSpec) { |
| Assert.isLegal(false); |
| } |
| |
| @Override |
| public void setDeclarator(IASTDeclarator declarator) { |
| Assert.isLegal(false); |
| } |
| |
| @Override |
| public ICPPASTParameterDeclaration copy() { |
| Assert.isLegal(false); |
| return null; |
| } |
| |
| @Override |
| public ICPPASTParameterDeclaration copy(CopyStyle style) { |
| Assert.isLegal(false); |
| return null; |
| } |
| |
| @Override |
| public boolean isParameterPack() { |
| Assert.isLegal(false); |
| return true; |
| } |
| } |