001 /*
002 * Copyright 2010-2013 JetBrains s.r.o.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017 package org.jetbrains.jet.lang.psi;
018
019 import com.intellij.lang.ASTNode;
020 import com.intellij.psi.PsiElement;
021 import com.intellij.util.SmartList;
022 import org.jetbrains.annotations.NotNull;
023 import org.jetbrains.annotations.Nullable;
024 import org.jetbrains.jet.JetNodeTypes;
025 import org.jetbrains.jet.lexer.JetTokens;
026
027 import java.util.Collections;
028 import java.util.List;
029
030 public class JetCallExpression extends JetExpressionImpl implements JetCallElement, JetReferenceExpression {
031 public JetCallExpression(@NotNull ASTNode node) {
032 super(node);
033 }
034
035 @Override
036 public <R, D> R accept(@NotNull JetVisitor<R, D> visitor, D data) {
037 return visitor.visitCallExpression(this, data);
038 }
039
040 @Override
041 @Nullable
042 public JetExpression getCalleeExpression() {
043 return findChildByClass(JetExpression.class);
044 }
045
046 @Override
047 @Nullable
048 public JetValueArgumentList getValueArgumentList() {
049 return (JetValueArgumentList) findChildByType(JetNodeTypes.VALUE_ARGUMENT_LIST);
050 }
051
052 @Nullable
053 public JetTypeArgumentList getTypeArgumentList() {
054 return (JetTypeArgumentList) findChildByType(JetNodeTypes.TYPE_ARGUMENT_LIST);
055 }
056
057 /**
058 * Normally there should be only one (or zero) function literal arguments.
059 * The returned value is a list for better handling of commonly made mistake of a function taking a lambda and returning another function.
060 * Most of users can simply ignore lists of more than one element.
061 */
062 @Override
063 @NotNull
064 public List<JetExpression> getFunctionLiteralArguments() {
065 JetExpression calleeExpression = getCalleeExpression();
066 ASTNode node;
067 if (calleeExpression instanceof JetFunctionLiteralExpression) {
068 node = calleeExpression.getNode().getTreeNext();
069 }
070 else {
071 node = getNode().getFirstChildNode();
072 }
073 List<JetExpression> result = new SmartList<JetExpression>();
074 while (node != null) {
075 PsiElement psi = node.getPsi();
076 if (psi instanceof JetFunctionLiteralExpression) {
077 result.add((JetFunctionLiteralExpression) psi);
078 }
079 else if (psi instanceof JetLabeledExpression) {
080 JetLabeledExpression labeledExpression = (JetLabeledExpression) psi;
081 JetExpression baseExpression = labeledExpression.getBaseExpression();
082 if (baseExpression instanceof JetFunctionLiteralExpression) {
083 result.add(labeledExpression);
084 }
085 }
086 node = node.getTreeNext();
087 }
088 return result;
089 }
090
091 @Override
092 @NotNull
093 public List<? extends ValueArgument> getValueArguments() {
094 JetValueArgumentList list = getValueArgumentList();
095 return list != null ? list.getArguments() : Collections.<JetValueArgument>emptyList();
096 }
097
098 @NotNull
099 public List<JetTypeProjection> getTypeArguments() {
100 JetTypeArgumentList list = getTypeArgumentList();
101 return list != null ? list.getArguments() : Collections.<JetTypeProjection>emptyList();
102 }
103 }