| /******************************************************************************* |
| * Copyright (c) 2005, 2016 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| *******************************************************************************/ |
| package org.eclipse.dltk.ruby.typeinference.evaluators; |
| |
| import java.util.List; |
| |
| import org.eclipse.dltk.ast.ASTNode; |
| import org.eclipse.dltk.ast.statements.Block; |
| import org.eclipse.dltk.ti.GoalState; |
| import org.eclipse.dltk.ti.goals.ExpressionTypeGoal; |
| import org.eclipse.dltk.ti.goals.GoalEvaluator; |
| import org.eclipse.dltk.ti.goals.IGoal; |
| import org.eclipse.dltk.ti.types.IEvaluatedType; |
| |
| public class BlockEvaluator extends GoalEvaluator { |
| |
| private ASTNode lastStatement; |
| private IEvaluatedType result; |
| |
| public BlockEvaluator(IGoal goal) { |
| super(goal); |
| } |
| |
| private ExpressionTypeGoal getTypedGoal() { |
| return (ExpressionTypeGoal) this.getGoal(); |
| } |
| |
| @Override |
| public Object produceResult() { |
| return this.result; |
| } |
| |
| @Override |
| public IGoal[] init() { |
| ExpressionTypeGoal typedGoal = getTypedGoal(); |
| Block block = (Block) typedGoal.getExpression(); |
| List<ASTNode> statements = block.getStatements(); |
| if (statements.size() > 0) { |
| this.lastStatement = statements.get(statements.size() - 1); |
| ExpressionTypeGoal subgoal = new ExpressionTypeGoal(goal |
| .getContext(), this.lastStatement); |
| return new IGoal[] { subgoal }; |
| } |
| return IGoal.NO_GOALS; |
| } |
| |
| @Override |
| public IGoal[] subGoalDone(IGoal subgoal, Object result, GoalState state) { |
| this.result = (IEvaluatedType) result; |
| return IGoal.NO_GOALS; |
| } |
| |
| } |