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Equal.cs
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Equal.cs
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// Copyright 2012-2017 Dmitry Kischenko
//
// 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.
using System;
using System.Diagnostics.CodeAnalysis;
using xFunc.Maths.Analyzers;
namespace xFunc.Maths.Expressions.Programming
{
/// <summary>
/// Represents the equality operator.
/// </summary>
public class Equal : BinaryExpression
{
[ExcludeFromCodeCoverage]
internal Equal() { }
/// <summary>
/// Initializes a new instance of the <see cref="Equal"/> class.
/// </summary>
/// <param name="left">The left (first) operand.</param>
/// <param name="right">The right (second) operand.</param>
public Equal(IExpression left, IExpression right) : base(left, right) { }
/// <summary>
/// Executes this expression.
/// </summary>
/// <param name="parameters">An object that contains all parameters and functions for expressions.</param>
/// <returns>
/// A result of the execution.
/// </returns>
/// <seealso cref="ExpressionParameters" />
public override object Execute(ExpressionParameters parameters)
{
var leftValueObject = m_left.Execute(parameters);
var rightValueObject = m_right.Execute(parameters);
if (leftValueObject is double leftDouble && rightValueObject is double rightDouble)
return leftDouble == rightDouble;
if (leftValueObject is bool leftBool && rightValueObject is bool rightBool)
return leftBool == rightBool;
throw new ResultIsNotSupportedException(this, leftValueObject, rightValueObject);
}
/// <summary>
/// Analyzes the current expression.
/// </summary>
/// <typeparam name="TResult">The type of the result.</typeparam>
/// <param name="analyzer">The analyzer.</param>
/// <returns>
/// The analysis result.
/// </returns>
public override TResult Analyze<TResult>(IAnalyzer<TResult> analyzer)
{
return analyzer.Analyze(this);
}
/// <summary>
/// Creates the clone of this instance.
/// </summary>
/// <returns>
/// Returns the new instance of <see cref="Equal" /> that is a clone of this instance.
/// </returns>
public override IExpression Clone()
{
return new Equal(m_left.Clone(), m_right.Clone());
}
}
}