expression_evaluator.h

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/*
 * Copyright 2026 MusicScience37 (Kenta Kabashima)
 *
 * 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.
 */
#pragma once
 
#include "func_sketch/common_types.h"
#include "func_sketch/expressions/expression.h"
 
namespace func_sketch::expressions {

class ExpressionEvaluator {
public:
    static void operator()(
        const Expression& expression, Real parameter, Real& result);
 
private:
    static void evaluate(
        const Expression& expression, Number parameter, Number& result);

    static void evaluate(const ConstantExpression& expression,
        Number /*parameter*/, Number& result);

    static void evaluate(const ParameterExpression& /*expression*/,
        Number parameter, Number& result);

    static void evaluate(
        const UnaryExpression& expression, Number parameter, Number& result);

    static void evaluate(
        const BinaryExpression& expression, Number parameter, Number& result);

    static void evaluate(const FunctionCallExpression& expression,
        Number parameter, Number& result);
};
 
}  // namespace func_sketch::expressions