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/*******************************************************************************
* Copyright (c) 2005, 2012 IBM Corporation 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:
* John Camelon (IBM Rational Software) - Initial API and implementation
* Markus Schorn (Wind River Systems)
* Sergey Prigogin (Google)
*******************************************************************************/
package org.eclipse.cdt.internal.core.dom.parser.c;
import org.eclipse.cdt.core.dom.ast.ASTVisitor;
import org.eclipse.cdt.core.dom.ast.EScopeKind;
import org.eclipse.cdt.core.dom.ast.IASTDeclaration;
import org.eclipse.cdt.core.dom.ast.IASTFunctionDefinition;
import org.eclipse.cdt.core.dom.ast.IASTName;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IASTParameterDeclaration;
import org.eclipse.cdt.core.dom.ast.IASTStandardFunctionDeclarator;
import org.eclipse.cdt.core.dom.ast.IScope;
import org.eclipse.cdt.core.parser.util.ArrayUtil;
import org.eclipse.cdt.internal.core.dom.parser.ASTQueries;
/**
* A function declarator for plain C.
*/
public class CASTFunctionDeclarator extends CASTDeclarator implements IASTStandardFunctionDeclarator {
private IASTParameterDeclaration[] parameters;
private int parametersPos= -1;
private boolean varArgs;
private IScope scope;
public CASTFunctionDeclarator() {
}
public CASTFunctionDeclarator(IASTName name) {
super(name);
}
@Override
public CASTFunctionDeclarator copy() {
return copy(CopyStyle.withoutLocations);
}
@Override
public CASTFunctionDeclarator copy(CopyStyle style) {
CASTFunctionDeclarator copy = new CASTFunctionDeclarator();
copy.varArgs = varArgs;
for (IASTParameterDeclaration param : getParameters()) {
copy.addParameterDeclaration(param == null ? null : param.copy(style));
}
return copy(copy, style);
}
@Override
public IASTParameterDeclaration[] getParameters() {
if (parameters == null)
return IASTParameterDeclaration.EMPTY_PARAMETERDECLARATION_ARRAY;
parameters = ArrayUtil.trimAt(IASTParameterDeclaration.class, parameters, parametersPos);
return parameters;
}
@Override
public void addParameterDeclaration(IASTParameterDeclaration parameter) {
assertNotFrozen();
if (parameter != null) {
parameter.setParent(this);
parameter.setPropertyInParent(FUNCTION_PARAMETER);
parameters = ArrayUtil.appendAt(IASTParameterDeclaration.class, parameters, ++parametersPos, parameter);
}
}
@Override
public boolean takesVarArgs() {
return varArgs;
}
@Override
public void setVarArgs(boolean value) {
assertNotFrozen();
varArgs = value;
}
@Override
protected boolean postAccept(ASTVisitor action) {
IASTParameterDeclaration[] params = getParameters();
for (int i = 0; i < params.length; i++) {
if (!params[i].accept(action))
return false;
}
return super.postAccept(action);
}
@Override
public void replace(IASTNode child, IASTNode other) {
if (parameters != null) {
for (int i = 0; i < parameters.length; ++i) {
if (child == parameters[i]) {
other.setPropertyInParent(child.getPropertyInParent());
other.setParent(child.getParent());
parameters[i]= (IASTParameterDeclaration) other;
return;
}
}
}
super.replace(child, other);
}
@Override
public IScope getFunctionScope() {
if (scope != null)
return scope;
// introduce a scope for function declarations and definitions, only.
IASTNode node= getParent();
while (!(node instanceof IASTDeclaration)) {
if (node==null)
return null;
node= node.getParent();
}
if (node instanceof IASTParameterDeclaration)
return null;
if (node instanceof IASTFunctionDefinition) {
scope= ((IASTFunctionDefinition) node).getScope();
} else if (ASTQueries.findTypeRelevantDeclarator(this) == this) {
scope = new CScope(this, EScopeKind.eLocal);
}
return scope;
}
}
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