// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
#nullable disable
 
using System.Diagnostics;
 
namespace Microsoft.CodeAnalysis.CSharp.Extensions;
 
internal static class SyntaxKindExtensions
{
    /// <summary>
    /// Determine if the given <see cref="SyntaxKind"/> array contains the given kind.
    /// </summary>
    /// <param name="kinds">Array to search</param>
    /// <param name="kind">Sought value</param>
    /// <returns>True if <paramref name = "kinds"/> contains the value<paramref name= "kind"/>.</returns>
    /// <remarks>PERF: Not using Array.IndexOf here because it results in a call to IndexOf on the
    /// default EqualityComparer for SyntaxKind.The default comparer for SyntaxKind is the
    /// ObjectEqualityComparer which results in boxing allocations.</remarks>
    public static bool Contains(this SyntaxKind[] kinds, SyntaxKind kind)
    {
        foreach (var k in kinds)
        {
            if (k == kind)
            {
                return true;
            }
        }
 
        return false;
    }
 
    public static SyntaxKind MapCompoundAssignmentKindToBinaryExpressionKind(this SyntaxKind syntaxKind)
    {
        switch (syntaxKind)
        {
            case SyntaxKind.AddAssignmentExpression:
                return SyntaxKind.AddExpression;
 
            case SyntaxKind.SubtractAssignmentExpression:
                return SyntaxKind.SubtractExpression;
 
            case SyntaxKind.MultiplyAssignmentExpression:
                return SyntaxKind.MultiplyExpression;
 
            case SyntaxKind.DivideAssignmentExpression:
                return SyntaxKind.DivideExpression;
 
            case SyntaxKind.ModuloAssignmentExpression:
                return SyntaxKind.ModuloExpression;
 
            case SyntaxKind.AndAssignmentExpression:
                return SyntaxKind.BitwiseAndExpression;
 
            case SyntaxKind.ExclusiveOrAssignmentExpression:
                return SyntaxKind.ExclusiveOrExpression;
 
            case SyntaxKind.OrAssignmentExpression:
                return SyntaxKind.BitwiseOrExpression;
 
            case SyntaxKind.LeftShiftAssignmentExpression:
                return SyntaxKind.LeftShiftExpression;
 
            case SyntaxKind.RightShiftAssignmentExpression:
                return SyntaxKind.RightShiftExpression;
 
            case SyntaxKind.CoalesceAssignmentExpression:
                return SyntaxKind.CoalesceExpression;
 
            default:
                Debug.Fail($"Unhandled compound assignment kind: {syntaxKind}");
                return SyntaxKind.None;
        }
    }
}