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/*******************************************************************************
* Copyright (c) 2005, 2008 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:
* IBM - Initial API and implementation
* Markus Schorn (Wind River Systems)
*******************************************************************************/
package org.eclipse.cdt.internal.core.dom.parser.cpp;
import org.eclipse.cdt.core.dom.ast.IASTName;
import org.eclipse.cdt.core.dom.ast.IASTParameterDeclaration;
import org.eclipse.cdt.core.dom.ast.IBinding;
import org.eclipse.cdt.core.dom.ast.IFunctionType;
import org.eclipse.cdt.core.dom.ast.IParameter;
import org.eclipse.cdt.core.dom.ast.IScope;
import org.eclipse.cdt.core.dom.ast.IType;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTFunctionDeclarator;
import org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.CPPVisitor;
/**
* The CPPImplicitFunction is used to represent implicit functions that exist on the translation
* unit but are not actually part of the physical AST created by CDT.
*
* An example is GCC built-in functions.
*
* @author dsteffle
*/
public class CPPImplicitFunction extends CPPFunction {
private IParameter[] parms=null;
private IScope scope=null;
private IType returnType=null;
private IFunctionType functionType=null;
private boolean takesVarArgs=false;
private char[] name=null;
public CPPImplicitFunction(char[] name, IScope scope, IType type, IParameter[] parms, boolean takesVarArgs) {
super( null );
this.name=name;
this.scope=scope;
this.returnType=type;
this.parms=parms;
this.takesVarArgs=takesVarArgs;
}
@Override
public IParameter [] getParameters() {
return parms;
}
@Override
public IFunctionType getType() {
if( functionType == null ){
ICPPASTFunctionDeclarator primary = getPrimaryDeclaration();
if( primary != null ){
functionType = super.getType();
} else {
functionType = CPPVisitor.createImplicitFunctionType( returnType, parms );
}
}
return functionType;
}
private ICPPASTFunctionDeclarator getPrimaryDeclaration() {
if (definition != null)
return definition;
else if (declarations != null && declarations.length > 0)
return declarations[0];
return null;
}
@Override
public String getName() {
return String.valueOf( name );
}
/* (non-Javadoc)
* @see org.eclipse.cdt.core.dom.ast.IBinding#getNameCharArray()
*/
@Override
public char[] getNameCharArray() {
return name;
}
/* (non-Javadoc)
* @see org.eclipse.cdt.core.dom.ast.IBinding#getScope()
*/
@Override
public IScope getScope() {
return scope;
}
/* (non-Javadoc)
* @see org.eclipse.cdt.core.dom.ast.IFunction#getFunctionScope()
*/
@Override
public IScope getFunctionScope() {
return null;
}
@Override
public IBinding resolveParameter( IASTParameterDeclaration param ){
IASTName aName = param.getDeclarator().getName();
IParameter binding = (IParameter) aName.getBinding();
if( binding != null )
return binding;
//get the index in the parameter list
ICPPASTFunctionDeclarator fdtor = (ICPPASTFunctionDeclarator) param.getParent();
IASTParameterDeclaration [] ps = fdtor.getParameters();
int i = 0;
for( ; i < ps.length; i++ ){
if( param == ps[i] )
break;
}
//set the binding for the corresponding parameter in all known defns and decls
binding = parms[i];
IASTParameterDeclaration temp = null;
if( definition != null ){
temp = definition.getParameters()[i];
IASTName n = temp.getDeclarator().getName();
n.setBinding( binding );
((CPPParameter)binding).addDeclaration( n );
}
if( declarations != null ){
for( int j = 0; j < declarations.length && declarations[j] != null; j++ ){
temp = declarations[j].getParameters()[i];
IASTName n = temp.getDeclarator().getName();
n.setBinding( binding );
((CPPParameter)binding).addDeclaration( n );
}
}
return binding;
}
@Override
protected void updateParameterBindings( ICPPASTFunctionDeclarator fdtor ){
if( parms != null ){
IASTParameterDeclaration [] nps = fdtor.getParameters();
if( nps.length != parms.length )
return;
for( int i = 0; i < nps.length; i++ ){
IASTName aName = nps[i].getDeclarator().getName();
aName.setBinding( parms[i] );
if( parms[i] instanceof ICPPInternalBinding )
((ICPPInternalBinding)parms[i]).addDeclaration( aName );
}
}
}
@Override
public boolean takesVarArgs() {
return takesVarArgs;
}
}
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