// Copyright (C) 2005 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;
/**
* A top level statement that declares a variable and assigns a function to it.
*
* @author mikesamuel@gmail.com
*/
public final class FunctionDeclaration extends Declaration {
private static final long serialVersionUID = 4973243536242692075L;
@ReflectiveCtor
public FunctionDeclaration(
FilePosition pos, Void value, List<? extends ParseTreeNode> children) {
super(pos, value, children);
}
public FunctionDeclaration(
FunctionConstructor initializer) {
super(initializer.getFilePosition(),
(Identifier) initializer.getIdentifier().clone(),
initializer);
}
@Override
protected void childrenChanged() {
super.childrenChanged();
FunctionConstructor initializer = getInitializer(); // Checks class.
if (null == initializer) {
throw new NullPointerException(
"Function declaration missing function");
}
if (!getIdentifierName().equals(initializer.getIdentifierName())) {
throw new IllegalStateException("Name mismatch");
}
}
@Override
public FunctionConstructor getInitializer() {
return (FunctionConstructor) super.getInitializer();
}
@Override
public boolean isTerminal() {
return getInitializer().getBody().isTerminal();
}
@Override
public void render(RenderContext rc) {
FunctionConstructor fc = getInitializer();
TokenConsumer out = rc.getOut();
out.mark(getFilePosition());
out.consume("function");
getIdentifier().render(rc);
out.consume("(");
boolean seen = false;
for (FormalParam p : fc.getParams()) {
if (seen) {
out.consume(",");
} else {
seen = true;
}
p.render(rc);
}
out.consume(")");
fc.getBody().renderBlock(rc, false);
}
}