| /* |
| * 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.types; |
| |
| import com.intellij.lang.PsiBuilder; |
| 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.statements.typeDefinitions.ReferenceElement; |
| import org.jetbrains.plugins.groovy.lang.parser.parsing.util.ParserUtils; |
| |
| /** |
| * @author: Dmitry.Krasilschikov |
| * @date: 28.03.2007 |
| */ |
| public class TypeArguments { |
| public static boolean parseTypeArguments(PsiBuilder builder, boolean expressionPossible) { |
| return parseTypeArguments(builder, expressionPossible, false); |
| } |
| |
| public static boolean parseTypeArguments(PsiBuilder builder, boolean expressionPossible, boolean allowDiamond) { |
| PsiBuilder.Marker marker = builder.mark(); |
| |
| if (!ParserUtils.getToken(builder, GroovyTokenTypes.mLT)) { |
| marker.rollbackTo(); |
| return false; |
| } |
| |
| ParserUtils.getToken(builder, GroovyTokenTypes.mNLS); |
| |
| if (allowDiamond && ParserUtils.getToken(builder, GroovyTokenTypes.mGT)) { |
| marker.done(GroovyElementTypes.TYPE_ARGUMENTS); |
| return true; |
| } |
| |
| if (!parseArgument(builder)) { |
| builder.error(GroovyBundle.message("type.argument.expected")); |
| if (ParserUtils.getToken(builder, GroovyTokenTypes.mGT)) { |
| marker.done(GroovyElementTypes.TYPE_ARGUMENTS); |
| return true; |
| } |
| else { |
| marker.rollbackTo(); |
| return false; |
| } |
| } |
| |
| boolean hasComma = ParserUtils.lookAhead(builder, GroovyTokenTypes.mCOMMA); |
| while (ParserUtils.getToken(builder, GroovyTokenTypes.mCOMMA)) { |
| ParserUtils.getToken(builder, GroovyTokenTypes.mNLS); |
| |
| if (!parseArgument(builder)) { |
| builder.error("type.argument.expected"); |
| } |
| } |
| |
| PsiBuilder.Marker rb = builder.mark(); |
| ParserUtils.getToken(builder, GroovyTokenTypes.mNLS); |
| |
| if (ParserUtils.getToken(builder, GroovyTokenTypes.mGT)) { |
| rb.drop(); |
| } |
| else if (hasComma) { |
| rb.rollbackTo(); |
| builder.error(GroovyBundle.message("gt.expected")); |
| } |
| else { |
| rb.drop(); |
| if (expressionPossible) { |
| marker.rollbackTo(); |
| return false; |
| } |
| else { |
| builder.error(GroovyBundle.message("gt.expected")); |
| } |
| } |
| |
| marker.done(GroovyElementTypes.TYPE_ARGUMENTS); |
| return true; |
| } |
| |
| private static boolean parseArgument(PsiBuilder builder) { |
| if (builder.getTokenType() == GroovyTokenTypes.mQUESTION) { |
| //wildcard |
| PsiBuilder.Marker taMarker = builder.mark(); |
| ParserUtils.getToken(builder, GroovyTokenTypes.mQUESTION); |
| if (ParserUtils.getToken(builder, GroovyTokenTypes.kSUPER) || ParserUtils.getToken(builder, GroovyTokenTypes.kEXTENDS)) { |
| ParserUtils.getToken(builder, GroovyTokenTypes.mNLS); |
| TypeSpec.parse(builder, false, false); |
| ParserUtils.getToken(builder, GroovyTokenTypes.mNLS); |
| } |
| |
| taMarker.done(GroovyElementTypes.TYPE_ARGUMENT); |
| return true; |
| } |
| |
| return TypeSpec.parse(builder, false, false) != ReferenceElement.ReferenceElementResult.FAIL; |
| } |
| } |