// Copyright (C) 2008 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.caja.parser.js;
import com.google.caja.lexer.FilePosition;
import com.google.caja.lexer.TokenConsumer;
import com.google.caja.parser.ParseTreeNode;
import com.google.caja.reporting.RenderContext;
import java.util.List;
/**
* ES3-12.10: The with statement adds a computed object to the front
* of the scope chain of the current execution context, then executes a
* statement with this augmented scope chain, then restores the scope
* chain. (ES5 expresses this in terms of environment records but with
* similar effect.)
*
* @author mikesamuel@gmail.com
*/
public final class WithStmt extends AbstractStatement
implements NestedScope {
private static final long serialVersionUID = -466457790772474853L;
/** @param value unused. This ctor is provided for reflection. */
@ReflectiveCtor
public WithStmt(
FilePosition pos, Void value, List<? extends Statement> children) {
super(pos, ParseTreeNode.class);
createMutation().appendChildren(children).execute();
}
public WithStmt(FilePosition pos, Expression scopeObject, Statement body) {
super(pos, ParseTreeNode.class);
createMutation()
.appendChild(scopeObject)
.appendChild(body)
.execute();
}
@Override
protected void childrenChanged() {
super.childrenChanged();
if (children().size() != 2) { throw new IllegalStateException(); }
getScopeObject();
getBody();
}
public Expression getScopeObject() { return (Expression) children().get(0); }
public Statement getBody() { return (Statement) children().get(1); }
@Override
public Object getValue() { return null; }
public void render(RenderContext rc) {
TokenConsumer out = rc.getOut();
out.consume("with");
out.consume("(");
getScopeObject().render(rc);
out.consume(")");
getBody().renderBlock(rc, false);
}
public boolean hasHangingConditional() {
return getBody().hasHangingConditional();
}
}