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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System;
using System.Diagnostics;
#nullable disable
namespace Microsoft.Build.Evaluation
{
/// <summary>
/// Compares for left < right
/// </summary>
[DebuggerDisplay("{DebuggerDisplay,nq}")]
internal sealed class LessThanExpressionNode : NumericComparisonExpressionNode
{
/// <summary>
/// Compare numerically
/// </summary>
/// <param name="left">left input</param>
/// <param name="right">right input</param>
/// <returns>true if right is higher than left, false otherwise</returns>
protected override bool Compare(double left, double right)
{
return left < right;
}
/// <summary>
/// Compare Versions. This is only intended to compare version formats like "A.B.C.D" which can otherwise not be compared numerically
/// </summary>
/// <param name="left">left version</param>
/// <param name="right">right version</param>
/// <returns>true if right version is higher than left, false otherwise</returns>
protected override bool Compare(Version left, Version right)
{
return left < right;
}
/// <summary>
/// Compare mixed numbers and Versions
/// </summary>
/// <param name="left">left version</param>
/// <param name="right">right number</param>
/// <returns>true if right is higher than major version of left, false otherwise</returns>
protected override bool Compare(Version left, double right)
{
if (left.Major != right)
{
return left.Major < right;
}
// If they have same "major" number, then that means we are comparing something like "6.X.Y.Z" to "6". Version treats the objects with more dots as
// "larger" regardless of what those dots are (e.g. 6.0.0.0 > 6 is a true statement)
return false;
}
/// <summary>
/// Compare mixed numbers and Versions
/// </summary>
/// <param name="left">left number</param>
/// <param name="right">right version</param>
/// <returns>true if the major version of right is higher than left, false otherwise</returns>
protected override bool Compare(double left, Version right)
{
if (right.Major != left)
{
return left < right.Major;
}
// If they have same "major" number, then that means we are comparing something like "6.X.Y.Z" to "6". Version treats the objects with more dots as
// "larger" regardless of what those dots are (e.g. 6.0.0.0 > 6 is a true statement)
return true;
}
internal override string DebuggerDisplay => $"(< {LeftChild.DebuggerDisplay} {RightChild.DebuggerDisplay})";
}
}
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