| /* |
| * Copyright 2000-2014 JetBrains s.r.o. |
| * |
| * 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 org.jetbrains.plugins.groovy.lang.parser.parsing.statements; |
| |
| import com.intellij.lang.PsiBuilder; |
| import com.intellij.psi.tree.IElementType; |
| import org.jetbrains.plugins.groovy.GroovyBundle; |
| import org.jetbrains.plugins.groovy.lang.lexer.GroovyTokenTypes; |
| import org.jetbrains.plugins.groovy.lang.parser.GroovyElementTypes; |
| import org.jetbrains.plugins.groovy.lang.parser.parsing.types.TypeSpec; |
| import org.jetbrains.plugins.groovy.lang.parser.parsing.util.ParserUtils; |
| |
| /** |
| * @author ilyas |
| */ |
| public class TupleParse { |
| public static boolean parseTupleForAssignment(PsiBuilder builder) { |
| PsiBuilder.Marker marker = parseTuple(builder, GroovyElementTypes.REFERENCE_EXPRESSION, false); |
| if (marker == null) return false; |
| marker.done(GroovyElementTypes.TUPLE_EXPRESSION); |
| return true; |
| } |
| |
| public static boolean parseTupleForVariableDeclaration(PsiBuilder builder) { |
| PsiBuilder.Marker marker = parseTuple(builder, GroovyElementTypes.VARIABLE, true); |
| if (marker == null) return false; |
| marker.drop(); |
| return true; |
| } |
| |
| public static PsiBuilder.Marker parseTuple(PsiBuilder builder, IElementType componentType, boolean acceptType) { |
| if (builder.getTokenType() != GroovyTokenTypes.mLPAREN) return null; |
| |
| final PsiBuilder.Marker marker = builder.mark(); |
| builder.advanceLexer(); |
| int count = 0; |
| do { |
| //skip unnecessary commas |
| while (ParserUtils.getToken(builder, GroovyTokenTypes.mCOMMA)) { |
| count++; |
| builder.error(GroovyBundle.message("identifier.expected")); |
| } |
| |
| if (acceptType) { |
| //parse modifiers for definitions |
| PsiBuilder.Marker typeMarker = builder.mark(); |
| TypeSpec.parse(builder); |
| if (builder.getTokenType() != GroovyTokenTypes.mIDENT) { |
| typeMarker.rollbackTo(); |
| } |
| else { |
| typeMarker.drop(); |
| } |
| } |
| |
| PsiBuilder.Marker componentMarker = builder.mark(); |
| if (!ParserUtils.getToken(builder, GroovyTokenTypes.mIDENT)) { |
| builder.error(GroovyBundle.message("identifier.expected")); |
| componentMarker.drop(); |
| } |
| else { |
| componentMarker.done(componentType); |
| count++; |
| } |
| } |
| while (ParserUtils.getToken(builder, GroovyTokenTypes.mCOMMA)); |
| |
| if (ParserUtils.getToken(builder, GroovyTokenTypes.mRPAREN)) { |
| return marker; |
| } |
| else if (count > 0) { //accept tuple if there was at least one comma or parsed tuple element inside it |
| builder.error(GroovyBundle.message("comma.or.rparen.expected")); |
| return marker; |
| } |
| else { |
| marker.rollbackTo(); |
| return null; |
| } |
| } |
| } |