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/* $Id$
*
* Copyright (C) 2007-2009 FAUmachine Team <info@faumachine.org>.
* This program is free software. You can redistribute it and/or modify it
* under the terms of the GNU General Public License, either version 2 of
* the License, or (at your option) any later version. See COPYING.
*/
#ifndef __TYPE_CONVERSION_HPP_INCLUDED
#define __TYPE_CONVERSION_HPP_INCLUDED
#include "frontend/ast/Expression.hpp"
#include "frontend/ast/TypeDeclaration.hpp"
namespace ast {
/** convert a source expression to a target type.
* This class represents both explicit VHDL type conversions as well
* as implicit type conversions, which type analysis will insert at
* the places in question.
*/
class TypeConversion : public Expression {
public:
/** c'tor
* @param src source expression
* @param trg type to which source should get converted to.
* @param loc Location of the type conversion in question.
*/
TypeConversion(
Expression *src,
const TypeDeclaration *trg,
Location loc
) : Expression(loc),
source(src),
targetType(trg) {}
//! Accept a Visitor.
/** All leaf AST nodes need to implement this method.
*
* @param visitor the Visitor that can visit this node.
*/
virtual void accept(Visitor &visitor) {
visitor.visit(*this);
}
/** Put a textual representation of the AstNode on the stream.
* @param stream stream to put the textual representation to.
*/
virtual void put(std::ostream &stream) const {
stream << this->targetType << '(' << this->source << ')';
}
/** source Expression of the TypeConversion */
Expression *source;
/** type to which source should get converted to.
* doesn't get reference counted. */
const TypeDeclaration *targetType;
protected:
/** Destructor */
virtual ~TypeConversion() {
util::MiscUtil::terminate(source);
}
};
}; /* namespace ast */
#endif /* __TYPE_CONVERSION_HPP_INCLUDED */
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