Command.java

/*******************************************************************************
 * Copyright (c) 2009-2013 CWI
 * 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
 *
 * Contributors:

 *   * Jurgen J. Vinju - Jurgen.Vinju@cwi.nl - CWI
 *   * Mark Hills - Mark.Hills@cwi.nl (CWI)
 *   * Arnold Lankamp - Arnold.Lankamp@cwi.nl
*******************************************************************************/
package org.rascalmpl.semantics.dynamic;

import org.rascalmpl.ast.ShellCommand;
import org.rascalmpl.interpreter.IEvaluator;
import org.rascalmpl.interpreter.env.Environment;
import org.rascalmpl.interpreter.result.Result;
import org.rascalmpl.value.IConstructor;
import org.rascalmpl.value.ISourceLocation;
import org.rascalmpl.value.IValue;

public abstract class Command extends org.rascalmpl.ast.Command {

	static public class Declaration extends
			org.rascalmpl.ast.Command.Declaration {

		public Declaration(ISourceLocation __param1, IConstructor tree,
				org.rascalmpl.ast.Declaration __param2) {
			super(__param1, tree, __param2);
		}

		@Override
		public Result<IValue> interpret(IEvaluator<Result<IValue>> eval) {
		  eval.setCurrentAST(this);
		  try {
		    return this.getDeclaration().interpret(eval);
		  } 
		  finally {
		    eval.setCurrentAST(this);
		  }
		}

	}

	static public class Expression extends org.rascalmpl.ast.Command.Expression {

		public Expression(ISourceLocation __param1, IConstructor tree, org.rascalmpl.ast.Expression __param2) {
			super(__param1, tree, __param2);
		}

		@Override
		public Result<IValue> interpret(IEvaluator<Result<IValue>> __eval) {

			Environment old = __eval.getCurrentEnvt();

			try {
				__eval.pushEnv();
				__eval.setCurrentAST(this.getExpression());
				return this.getExpression().interpret(__eval);
			} finally {
				__eval.unwind(old);
				__eval.setCurrentAST(this.getExpression());
			}

		}

	}

	static public class Import extends org.rascalmpl.ast.Command.Import {

		public Import(ISourceLocation __param1, IConstructor tree, org.rascalmpl.ast.Import __param2) {
			super(__param1, tree, __param2);
		}

		@Override
		public Result<IValue> interpret(IEvaluator<Result<IValue>> __eval) {
		  try {
		    __eval.setCurrentAST(this);
		    Result<IValue> res = this.getImported().interpret(__eval);

		    // If we import a module from the command line, notify any
		    // expressions caching
		    // results that could be invalidated by a module load that we have
		    // loaded.
		    __eval.notifyConstructorDeclaredListeners();

		    return res;
		  }
		  finally {
		    __eval.setCurrentAST(this);
		  }

		}

	}

	static public class Shell extends org.rascalmpl.ast.Command.Shell {

		public Shell(ISourceLocation __param1, IConstructor tree, ShellCommand __param2) {
			super(__param1, tree, __param2);
		}

		@Override
		public Result<IValue> interpret(IEvaluator<Result<IValue>> __eval) {

			__eval.setCurrentAST(this);
			return this.getCommand().interpret(__eval);

		}

	}

	static public class Statement extends org.rascalmpl.ast.Command.Statement {

		public Statement(ISourceLocation __param1, IConstructor tree, org.rascalmpl.ast.Statement __param2) {
			super(__param1, tree, __param2);
		}

		@Override
		public Result<IValue> interpret(IEvaluator<Result<IValue>> __eval) {
		  try {
		    __eval.setCurrentAST(this.getStatement());
		    return __eval.eval(this.getStatement());
		  }
		  finally {
		    __eval.setCurrentAST(this.getStatement());
		  }

		}

	}

	public Command(ISourceLocation __param1, IConstructor tree) {
		super(__param1, tree);
	}
}