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ASTOperatorPrecedenceController.h
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ASTOperatorPrecedenceController.h
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/* -*- coding: utf-8 -*-
*
* Copyright 2022 IBM RESEARCH. 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 __QASM_AST_OPERATOR_PRECEDENCE_CONTROLLER_H
#define __QASM_AST_OPERATOR_PRECEDENCE_CONTROLLER_H
#include <qasm/AST/ASTTypes.h>
#include <map>
#include <vector>
namespace QASM {
class ASTOperatorPrecedenceController {
private:
static ASTOperatorPrecedenceController OPC;
static const std::map<ASTOpType, uint32_t> OPM;
// Rank Bias.
static const uint32_t RB = 1000U;
protected:
ASTOperatorPrecedenceController() = default;
public:
static ASTOperatorPrecedenceController &Instance() { return OPC; }
~ASTOperatorPrecedenceController() = default;
uint32_t GetOperatorPrecedence(ASTOpType OTy) const {
std::map<ASTOpType, uint32_t>::const_iterator MI = OPM.find(OTy);
return MI == OPM.end() ? static_cast<uint32_t>(~0x0) : (*MI).second;
}
void Expand(const ASTBinaryOpNode *BOP,
std::multimap<uint32_t, ASTVariantOpNode> &MOP) const;
void Expand(const ASTUnaryOpNode *UOP,
std::multimap<uint32_t, ASTVariantOpNode> &MOP) const;
void Expand(const ASTComplexExpressionNode *CEX,
std::multimap<uint32_t, ASTVariantOpNode> &MOP) const;
void print(const std::multimap<uint32_t, ASTVariantOpNode> &MOP) const;
};
} // namespace QASM
#endif // __QASM_AST_OPERATOR_PRECEDENCE_CONTROLLER_H