| /******************************************************************************* |
| * Copyright (c) 2012 NumberFour AG |
| * |
| * 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: |
| * NumberFour AG - initial API and Implementation (Alex Panchenko) |
| *******************************************************************************/ |
| package org.eclipse.dltk.javascript.typeinfo; |
| |
| import java.util.List; |
| |
| import org.eclipse.dltk.annotations.Nullable; |
| import org.eclipse.dltk.javascript.typeinference.ReferenceLocation; |
| import org.eclipse.dltk.javascript.typeinfo.IModelBuilder.IElement; |
| import org.eclipse.dltk.javascript.typeinfo.model.ParameterKind; |
| |
| public class RUtils { |
| |
| public static ReferenceLocation locationOf(IRElement element) { |
| final Object source = element.getSource(); |
| if (source instanceof IElement) { |
| return ((IElement) source).getLocation(); |
| } else { |
| return null; |
| } |
| } |
| |
| /** |
| * Returns the parameter matching the specified position (e.g. it can return |
| * vararg parameter if position exceeds the number of declared parameters) |
| * or <code>null</code> if position is not correct. |
| */ |
| @Nullable |
| public static IRParameter getParameterFor(IRMethod method, int position) { |
| if (position < 0) { |
| return null; |
| } |
| final List<IRParameter> params = method.getParameters(); |
| if (position < params.size()) { |
| return params.get(position); |
| } else if (!params.isEmpty()) { |
| final IRParameter last = params.get(params.size() - 1); |
| if (last.getKind() == ParameterKind.VARARGS) { |
| return last; |
| } |
| } |
| return null; |
| } |
| |
| } |