| /* |
| * Copyright 2000-2013 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 com.jetbrains.python.psi.types.functionalParser; |
| |
| import com.intellij.openapi.util.Pair; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.List; |
| |
| /** |
| * @author vlan |
| */ |
| public class ForwardDeclaration<R, T> extends FunctionalParserBase<R, T> { |
| private FunctionalParser<R, T> myParser = null; |
| |
| @NotNull |
| public static <R, T> ForwardDeclaration<R, T> create() { |
| return new ForwardDeclaration<R, T>(); |
| } |
| |
| @NotNull |
| public ForwardDeclaration<R, T> define(@NotNull FunctionalParser<R, T> parser) { |
| myParser = parser; |
| return this; |
| } |
| |
| @NotNull |
| @Override |
| public Pair<R, State> parse(@NotNull List<Token<T>> tokens, @NotNull State state) throws ParserException { |
| if (myParser != null) { |
| return myParser.parse(tokens, state); |
| } |
| throw new IllegalStateException("Undefined forward parser declaration"); |
| } |
| } |