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/*******************************************************************************
* Copyright (c) 2018 Institute for Software, HSR Hochschule fuer Technik
* Rapperswil, University of applied sciences.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Thomas Corbat (IFS) - Initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.internal.core.dom.parser.cpp;
import java.util.Arrays;
import org.eclipse.cdt.core.dom.ast.ASTVisitor;
import org.eclipse.cdt.core.dom.ast.IASTDeclSpecifier;
import org.eclipse.cdt.core.dom.ast.IASTImplicitName;
import org.eclipse.cdt.core.dom.ast.IASTInitializer;
import org.eclipse.cdt.core.dom.ast.IASTName;
import org.eclipse.cdt.core.dom.ast.IBinding;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTFunctionDeclarator.RefQualifier;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTStructuredBindingDeclaration;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPBinding;
import org.eclipse.cdt.core.parser.util.ArrayUtil;
import org.eclipse.cdt.internal.core.dom.parser.ASTNode;
import org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalFixed;
import org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.ExecDeclarator;
import org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.ExecIncomplete;
import org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.ExecSimpleDeclaration;
import org.eclipse.jdt.annotation.NonNull;
public class CPPASTStructuredBindingDeclaration extends CPPASTSimpleDeclaration
implements ICPPASTStructuredBindingDeclaration {
private RefQualifier refQualifier;
private IASTName[] names;
private IASTInitializer initializer;
private IASTImplicitName implicitInitializerName;
public CPPASTStructuredBindingDeclaration() {
}
public CPPASTStructuredBindingDeclaration(IASTDeclSpecifier declSpecifier, RefQualifier refQualifier,
IASTName[] names, IASTInitializer initializer) {
super(declSpecifier);
this.refQualifier = refQualifier;
for (IASTName name : names) {
addName(name);
}
setInitializer(initializer);
}
@Override
public RefQualifier getRefQualifier() {
return refQualifier;
}
public void setRefQualifier(RefQualifier refQualifier) {
assertNotFrozen();
this.refQualifier = refQualifier;
}
@Override
public IASTName[] getNames() {
if (names == null) {
return IASTName.EMPTY_NAME_ARRAY;
}
names = ArrayUtil.trim(names);
return names;
}
@Override
public IASTInitializer getInitializer() {
return initializer;
}
@Override
public boolean accept(ASTVisitor action) {
if (action.shouldVisitDeclarations) {
switch (action.visit(this)) {
case ASTVisitor.PROCESS_ABORT:
return false;
case ASTVisitor.PROCESS_SKIP:
return true;
default:
break;
}
}
IASTDeclSpecifier declSpecifier = getDeclSpecifier();
if (declSpecifier != null && !declSpecifier.accept(action)) {
return false;
}
for (IASTName name : getNames()) {
if (!name.accept(action)) {
return false;
}
}
if (initializer != null && !initializer.accept(action)) {
return false;
}
if (action.shouldVisitImplicitNames && !getImplicitNames()[0].accept(action)) {
return false;
}
if (action.shouldVisitDeclarations) {
switch (action.leave(this)) {
case ASTVisitor.PROCESS_ABORT:
return false;
case ASTVisitor.PROCESS_SKIP:
return true;
default:
break;
}
}
return true;
}
protected void addName(IASTName name) {
assertNotFrozen();
if (name != null) {
names = ArrayUtil.append(IASTName.class, names, name);
name.setParent(this);
name.setPropertyInParent(IDENTIFIER);
}
}
protected void setInitializer(IASTInitializer initializer) {
assertNotFrozen();
if (initializer != null) {
this.initializer = initializer;
initializer.setParent(this);
initializer.setPropertyInParent(INITIALIZER);
}
}
@Override
public CPPASTStructuredBindingDeclaration copy() {
return copy(CopyStyle.withoutLocations);
}
@Override
public CPPASTStructuredBindingDeclaration copy(CopyStyle style) {
CPPASTStructuredBindingDeclaration copy = new CPPASTStructuredBindingDeclaration();
return copy(copy, style);
}
protected <T extends CPPASTStructuredBindingDeclaration> T copy(@NonNull T copy, CopyStyle style) {
copy.setRefQualifier(refQualifier);
if (initializer != null) {
copy.setInitializer(initializer.copy(style));
}
for (IASTName name : names) {
if (name == null) {
break;
}
copy.addName(name.copy(style));
}
return super.copy(copy, style);
}
@Override
public ICPPExecution getExecution() {
IASTName[] names = getNames();
ICPPExecution[] nameExecutions = Arrays.stream(names).map(name -> {
IBinding binding = name.resolveBinding();
if (binding instanceof CPPVariable) {
CPPVariable variable = (CPPVariable) binding;
ICPPEvaluation initializerEval = variable.getInitializerEvaluation();
return new ExecDeclarator((ICPPBinding) binding, initializerEval);
}
return ExecIncomplete.INSTANCE;
}).toArray(ICPPExecution[]::new);
return new ExecSimpleDeclaration(nameExecutions);
}
@Override
public int getRoleForName(IASTName name) {
return r_definition;
}
@Override
public IASTImplicitName[] getImplicitNames() {
if (implicitInitializerName == null) {
ICPPEvaluation initializerEvaluation = CPPVariable.evaluationOfInitializer(initializer);
if (initializerEvaluation == null) {
initializerEvaluation = EvalFixed.INCOMPLETE;
}
CPPASTImplicitName implicitName = new CPPASTImplicitName(this);
implicitName.setIsDefinition(true);
if (initializer != null) {
implicitName.setOffsetAndLength((ASTNode) initializer);
}
implicitInitializerName = implicitName;
CPPStructuredBindingComposite implicitInitializerVariable = new CPPStructuredBindingComposite(
implicitInitializerName, initializerEvaluation);
implicitInitializerName.setBinding(implicitInitializerVariable);
}
return new IASTImplicitName[] { implicitInitializerName };
}
}
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