// 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.SomethingWidgyHappenedError;
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 com.google.javascript.jscomp.jsonml.JsonML;
import com.google.javascript.jscomp.jsonml.TagType;
import java.util.List;
/**
* A group of declarations as in
* {@code var a, b, c;}
* or
* {@code for (var a, b, c; ;)}
*
* @author mikesamuel@gmail.com
*/
public final class MultiDeclaration extends AbstractStatement {
private static final long serialVersionUID = 4634282561782526243L;
/** @param value unused. This ctor is provided for reflection. */
@ReflectiveCtor
public MultiDeclaration(
FilePosition pos, Void value, List<? extends Declaration> children) {
this(pos, children);
}
public MultiDeclaration(FilePosition pos, List<? extends Declaration> decls) {
super(pos, Declaration.class);
createMutation().appendChildren(decls).execute();
}
@Override
protected void childrenChanged() {
super.childrenChanged();
if (children().isEmpty()) { throw new IllegalStateException(); }
for (ParseTreeNode child : children()) {
if (!(child instanceof Declaration)) {
throw new IllegalArgumentException("Child must be a declaration");
}
}
}
@Override
public Object getValue() { return null; }
@Override
public List<? extends Declaration> children() {
return childrenAs(Declaration.class);
}
public void render(RenderContext rc) {
TokenConsumer out = rc.getOut();
out.mark(getFilePosition());
if (children().isEmpty()) {
throw new SomethingWidgyHappenedError("Empty MultiDeclaration");
}
out.consume("var");
boolean seen = false;
for (Declaration decl : children()) {
if (seen) {
out.consume(",");
} else {
seen = true;
}
decl.renderShort(rc);
}
}
public boolean hasHangingConditional() { return false; }
public JsonML toJsonML() {
JsonMLBuilder builder = JsonMLBuilder.builder(
TagType.VarDecl, getFilePosition());
for (Declaration d : children()) {
builder.addChild(d.toInitOrIdPatt());
}
return builder.build();
}
}