65 lines
1.9 KiB
C++
65 lines
1.9 KiB
C++
/* -*- C++ -*-
|
|
* Serene programming language.
|
|
*
|
|
* Copyright (c) 2019-2021 Sameer Rahmani <lxsameer@gnu.org>
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
#ifndef SERENE_ENVIRONMENT_H
|
|
#define SERENE_ENVIRONMENT_H
|
|
|
|
#include "mlir/Support/LogicalResult.h"
|
|
#include "serene/llvm/patches.h"
|
|
|
|
#include "llvm/ADT/DenseMap.h"
|
|
|
|
namespace serene {
|
|
|
|
template <typename K, typename V>
|
|
class Environment {
|
|
Environment<K, V> *parent;
|
|
llvm::DenseMap<K, V> pairs;
|
|
|
|
public:
|
|
Environment() : parent(nullptr) {}
|
|
Environment(Environment *parent) : parent(parent){};
|
|
|
|
llvm::Optional<V> lookup(K key) {
|
|
if (auto value = pairs.lookup(key)) {
|
|
return value;
|
|
}
|
|
|
|
if (parent) {
|
|
return parent->lookup(key);
|
|
}
|
|
|
|
return llvm::None;
|
|
};
|
|
|
|
mlir::LogicalResult insert_symbol(K key, V value) {
|
|
pairs.insert(std::pair<K, V>(key, value));
|
|
return mlir::success();
|
|
};
|
|
};
|
|
|
|
} // namespace serene
|
|
|
|
#endif
|