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/*
* Copyright (c) 2018 Samsung Electronics Co., Ltd. All Rights Reserved
*
* 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.
*/
#ifndef __NEST_EXPR_NODE_H__
#define __NEST_EXPR_NODE_H__
#include "nest/expr/Macro.h"
#include "nest/expr/Forward.h"
#include "nest/expr/Visitor.h"
#include <stdexcept>
namespace nest
{
namespace expr
{
struct Node
{
virtual ~Node() = default;
#define EXPR(Tag) \
virtual const NEST_EXPR_CLASS_NAME(Tag) * NEST_EXPR_CAST_METHOD_NAME(Tag)(void) const \
{ \
return nullptr; \
}
#include "nest/expr/Node.def"
#undef EXPR
template <typename T> T accept(Visitor<T> *v)
{
#define EXPR(Tag) \
if (auto e = NEST_EXPR_CAST_METHOD_NAME(Tag)()) \
{ \
return v->visit(e); \
}
#include "nest/expr/Node.def"
#undef EXPR
throw std::runtime_error{"unreachable"};
}
template <typename T> T accept(Visitor<T> &v) { return accept(&v); }
};
} // namespace expr
} // namespace nest
#endif // __NEST_EXPR_NODE_H__
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