| /* |
| * 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 com.intellij.psi.tree.TokenSet; |
| 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.GroovyParser; |
| import org.jetbrains.plugins.groovy.lang.parser.parsing.statements.expressions.AssignmentExpression; |
| import org.jetbrains.plugins.groovy.lang.parser.parsing.statements.expressions.ExpressionStatement; |
| import org.jetbrains.plugins.groovy.lang.parser.parsing.util.ParserUtils; |
| |
| /** |
| * @author ilyas |
| */ |
| public class SwitchStatement { |
| |
| public static final TokenSet SKIP_SET = TokenSet.create(GroovyTokenTypes.kCASE, GroovyTokenTypes.kDEFAULT, GroovyTokenTypes.mRCURLY); |
| |
| public static void parseSwitch(PsiBuilder builder, GroovyParser parser) { |
| PsiBuilder.Marker marker = builder.mark(); |
| ParserUtils.getToken(builder, GroovyTokenTypes.kSWITCH); |
| |
| if (!ParserUtils.getToken(builder, GroovyTokenTypes.mLPAREN, GroovyBundle.message("lparen.expected"))) { |
| marker.done(GroovyElementTypes.SWITCH_STATEMENT); |
| return; |
| } |
| if (!ExpressionStatement.argParse(builder, parser)) { |
| builder.error(GroovyBundle.message("expression.expected")); |
| } |
| ParserUtils.getToken(builder, GroovyTokenTypes.mNLS); |
| |
| if (!ParserUtils.getToken(builder, GroovyTokenTypes.mRPAREN, GroovyBundle.message("rparen.expected"))) { |
| builder.error(GroovyBundle.message("rparen.expected")); |
| marker.done(GroovyElementTypes.SWITCH_STATEMENT); |
| return; |
| } |
| PsiBuilder.Marker warn = builder.mark(); |
| ParserUtils.getToken(builder, GroovyTokenTypes.mNLS); |
| |
| if (!GroovyTokenTypes.mLCURLY.equals(builder.getTokenType())) { |
| warn.rollbackTo(); |
| builder.error(GroovyBundle.message("case.block.expected")); |
| marker.done(GroovyElementTypes.SWITCH_STATEMENT); |
| return; |
| } |
| warn.drop(); |
| parseCaseBlock(builder, parser); |
| marker.done(GroovyElementTypes.SWITCH_STATEMENT); |
| } |
| |
| private static void parseCaseBlock(PsiBuilder builder, GroovyParser parser) { |
| ParserUtils.getToken(builder, GroovyTokenTypes.mLCURLY); |
| ParserUtils.getToken(builder, GroovyTokenTypes.mNLS); |
| |
| while (!ParserUtils.getToken(builder, GroovyTokenTypes.mRCURLY)) { |
| if (builder.getTokenType() != GroovyTokenTypes.kCASE && builder.getTokenType() != GroovyTokenTypes.kDEFAULT) { |
| builder.error("case, default or } expected"); |
| ParserUtils.skipCountingBraces(builder, SKIP_SET); |
| if (builder.eof() || ParserUtils.getToken(builder, GroovyTokenTypes.mRCURLY)) { |
| return; |
| } |
| } |
| |
| PsiBuilder.Marker sectionMarker = builder.mark(); |
| parseCaseLabel(builder, parser); |
| |
| final PsiBuilder.Marker warn = builder.mark(); |
| ParserUtils.getToken(builder, GroovyTokenTypes.mNLS); |
| if (builder.getTokenType() == GroovyTokenTypes.mRCURLY) { |
| warn.rollbackTo(); |
| builder.error(GroovyBundle.message("statement.expected")); |
| } |
| else { |
| warn.drop(); |
| parser.parseSwitchCaseList(builder); |
| } |
| sectionMarker.done(GroovyElementTypes.CASE_SECTION); |
| ParserUtils.getToken(builder, GroovyTokenTypes.mNLS); |
| } |
| } |
| |
| /** |
| * Parses one or more sequential 'case' or 'default' labels |
| */ |
| public static boolean parseCaseLabel(PsiBuilder builder, GroovyParser parser) { |
| IElementType elem = builder.getTokenType(); |
| if (elem != GroovyTokenTypes.kCASE && elem != GroovyTokenTypes.kDEFAULT) { |
| return false; |
| } |
| |
| PsiBuilder.Marker label = builder.mark(); |
| builder.advanceLexer(); |
| if (GroovyTokenTypes.kCASE.equals(elem) && !AssignmentExpression.parse(builder, parser)) { |
| builder.error(GroovyBundle.message("expression.expected")); |
| } |
| ParserUtils.getToken(builder, GroovyTokenTypes.mCOLON, GroovyBundle.message("colon.expected")); |
| label.done(GroovyElementTypes.CASE_LABEL); |
| PsiBuilder.Marker beforeNls = builder.mark(); |
| ParserUtils.getToken(builder, GroovyTokenTypes.mNLS); |
| if (parseCaseLabel(builder, parser)) { |
| beforeNls.drop(); |
| } |
| else { |
| beforeNls.rollbackTo(); |
| } |
| return true; |
| } |
| } |