| /* |
| * 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.expressions.relational; |
| |
| 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.lexer.TokenSets; |
| import org.jetbrains.plugins.groovy.lang.parser.GroovyElementTypes; |
| import org.jetbrains.plugins.groovy.lang.parser.GroovyParser; |
| import org.jetbrains.plugins.groovy.lang.parser.parsing.statements.expressions.arithmetic.ShiftExpression; |
| import org.jetbrains.plugins.groovy.lang.parser.parsing.statements.typeDefinitions.ReferenceElement; |
| import org.jetbrains.plugins.groovy.lang.parser.parsing.types.TypeSpec; |
| import org.jetbrains.plugins.groovy.lang.parser.parsing.util.ParserUtils; |
| |
| /** |
| * @author ilyas |
| */ |
| public class RelationalExpression { |
| |
| public static boolean parse(PsiBuilder builder, GroovyParser parser) { |
| |
| PsiBuilder.Marker marker = builder.mark(); |
| |
| if (ShiftExpression.parse(builder, parser)) { |
| if (ParserUtils.getToken(builder, TokenSets.RELATIONS) || getCompositeSign(builder)) { |
| ParserUtils.getToken(builder, GroovyTokenTypes.mNLS); |
| ShiftExpression.parse(builder, parser); |
| marker.done(GroovyElementTypes.RELATIONAL_EXPRESSION); |
| } else if (GroovyTokenTypes.kINSTANCEOF.equals(builder.getTokenType())) { |
| advanceLexerAndParseType(builder); |
| marker.done(GroovyElementTypes.INSTANCEOF_EXPRESSION); |
| } else if (GroovyTokenTypes.kAS.equals(builder.getTokenType())) { |
| advanceLexerAndParseType(builder); |
| marker.done(GroovyElementTypes.SAFE_CAST_EXPRESSION); |
| } else { |
| marker.drop(); |
| } |
| return true; |
| } else { |
| marker.drop(); |
| return false; |
| } |
| |
| } |
| |
| private static void advanceLexerAndParseType(PsiBuilder builder) { |
| builder.advanceLexer(); |
| PsiBuilder.Marker rb = builder.mark(); |
| ParserUtils.getToken(builder, GroovyTokenTypes.mNLS); |
| if (TypeSpec.parse(builder) == ReferenceElement.ReferenceElementResult.FAIL) { |
| rb.rollbackTo(); |
| builder.error(GroovyBundle.message("type.specification.expected")); |
| } else { |
| rb.drop(); |
| } |
| } |
| |
| /** |
| * For composite shift operators like >>> |
| * |
| * @param builder |
| * @return |
| */ |
| private static boolean getCompositeSign(PsiBuilder builder) { |
| if (ParserUtils.lookAhead(builder, GroovyTokenTypes.mGT, GroovyTokenTypes.mASSIGN)) { |
| PsiBuilder.Marker marker = builder.mark(); |
| for (int i = 0; i < 2; i++) { |
| builder.advanceLexer(); |
| } |
| marker.done(GroovyElementTypes.MORE_OR_EQUALS_SIGN); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| |
| } |