/*******************************************************************************
* Copyright (c) 2004, 2011 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) - 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.ASTVisitor;
import org.eclipse.cdt.core.dom.ast.IASTDeclaration;
import org.eclipse.cdt.core.dom.ast.IASTExpression;
import org.eclipse.cdt.core.dom.ast.IASTIfStatement;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IASTStatement;
import org.eclipse.cdt.core.dom.ast.IScope;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTIfStatement;
import org.eclipse.cdt.internal.core.dom.parser.ASTNode;
import org.eclipse.cdt.internal.core.dom.parser.IASTAmbiguityParent;
/**
* If statement in C++
*/
public class CPPASTIfStatement extends ASTNode implements ICPPASTIfStatement, IASTAmbiguityParent {
private IASTExpression condition;
private IASTStatement thenClause;
private IASTStatement elseClause;
private IASTDeclaration condDecl;
private IScope scope;
public CPPASTIfStatement() {
}
public CPPASTIfStatement(IASTDeclaration condition, IASTStatement thenClause, IASTStatement elseClause) {
setConditionDeclaration(condition);
setThenClause(thenClause);
setElseClause(elseClause);
}
public CPPASTIfStatement(IASTExpression condition, IASTStatement thenClause, IASTStatement elseClause) {
setConditionExpression(condition);
setThenClause(thenClause);
setElseClause(elseClause);
}
public CPPASTIfStatement copy() {
return copy(CopyStyle.withoutLocations);
}
public CPPASTIfStatement copy(CopyStyle style) {
CPPASTIfStatement copy = new CPPASTIfStatement();
copy.setConditionDeclaration(condDecl == null ? null : condDecl.copy(style));
copy.setConditionExpression(condition == null ? null : condition.copy(style));
copy.setThenClause(thenClause == null ? null : thenClause.copy(style));
copy.setElseClause(elseClause == null ? null : elseClause.copy(style));
copy.setOffsetAndLength(this);
if (style == CopyStyle.withLocations) {
copy.setCopyLocation(this);
}
return copy;
}
public IASTExpression getConditionExpression() {
return condition;
}
public void setConditionExpression(IASTExpression condition) {
assertNotFrozen();
this.condition = condition;
if (condition != null) {
condition.setParent(this);
condition.setPropertyInParent(CONDITION);
condDecl= null;
}
}
public IASTStatement getThenClause() {
return thenClause;
}
public void setThenClause(IASTStatement thenClause) {
assertNotFrozen();
this.thenClause = thenClause;
if (thenClause != null) {
thenClause.setParent(this);
thenClause.setPropertyInParent(THEN);
}
}
public IASTStatement getElseClause() {
return elseClause;
}
public void setElseClause(IASTStatement elseClause) {
assertNotFrozen();
this.elseClause = elseClause;
if (elseClause != null) {
elseClause.setParent(this);
elseClause.setPropertyInParent(ELSE);
}
}
private static class N {
final IASTIfStatement fIfStatement;
N fNext;
N(IASTIfStatement stmt) {
fIfStatement = stmt;
}
}
@Override
public boolean accept(ASTVisitor action) {
N stack= null;
ICPPASTIfStatement stmt= this;
loop: for (;;) {
if (action.shouldVisitStatements) {
switch (action.visit(stmt)) {
case ASTVisitor.PROCESS_ABORT: return false;
case ASTVisitor.PROCESS_SKIP:
stmt= null;
break loop;
default: break;
}
}
IASTNode child = stmt.getConditionExpression();
if (child != null && !child.accept(action))
return false;
child= stmt.getConditionDeclaration();
if (child != null && !child.accept(action))
return false;
child= stmt.getThenClause();
if (child != null && !child.accept(action))
return false;
child= stmt.getElseClause();
if (child instanceof ICPPASTIfStatement) {
if (action.shouldVisitStatements) {
N n= new N(stmt);
n.fNext= stack;
stack= n;
}
stmt= (ICPPASTIfStatement) child;
} else {
if (child != null && !child.accept(action))
return false;
break loop;
}
}
if (action.shouldVisitStatements) {
if (stmt != null && action.leave(stmt) == ASTVisitor.PROCESS_ABORT)
return false;
while (stack != null) {
if (action.leave(stack.fIfStatement) == ASTVisitor.PROCESS_ABORT)
return false;
stack= stack.fNext;
}
}
return true;
}
public void replace(IASTNode child, IASTNode other) {
if (thenClause == child) {
other.setParent(child.getParent());
other.setPropertyInParent(child.getPropertyInParent());
thenClause = (IASTStatement) other;
} else if (elseClause == child) {
other.setParent(child.getParent());
other.setPropertyInParent(child.getPropertyInParent());
elseClause = (IASTStatement) other;
} else if (condition == child || condDecl == child) {
if (other instanceof IASTExpression) {
setConditionExpression((IASTExpression) other);
} else if (other instanceof IASTDeclaration) {
setConditionDeclaration((IASTDeclaration) other);
}
}
}
public IASTDeclaration getConditionDeclaration() {
return condDecl;
}
public void setConditionDeclaration(IASTDeclaration d) {
assertNotFrozen();
condDecl = d;
if (d != null) {
d.setParent(this);
d.setPropertyInParent(CONDITION);
condition= null;
}
}
public IScope getScope() {
if( scope == null )
scope = new CPPBlockScope( this );
return scope;
}
}