// 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 enable

using Microsoft.CodeAnalysis.LanguageService;

namespace Microsoft.CodeAnalysis.Shared.Extensions;

internal static class PredefinedTypeExtensions
{
    public static SpecialType ToSpecialType(this PredefinedType predefinedType)
        => predefinedType switch
        {
            PredefinedType.Object => SpecialType.System_Object,
            PredefinedType.Void => SpecialType.System_Void,
            PredefinedType.Boolean => SpecialType.System_Boolean,
            PredefinedType.Char => SpecialType.System_Char,
            PredefinedType.SByte => SpecialType.System_SByte,
            PredefinedType.Byte => SpecialType.System_Byte,
            PredefinedType.Int16 => SpecialType.System_Int16,
            PredefinedType.UInt16 => SpecialType.System_UInt16,
            PredefinedType.Int32 => SpecialType.System_Int32,
            PredefinedType.UInt32 => SpecialType.System_UInt32,
            PredefinedType.Int64 => SpecialType.System_Int64,
            PredefinedType.UInt64 => SpecialType.System_UInt64,
            PredefinedType.Decimal => SpecialType.System_Decimal,
            PredefinedType.Single => SpecialType.System_Single,
            PredefinedType.Double => SpecialType.System_Double,
            PredefinedType.String => SpecialType.System_String,
            PredefinedType.DateTime => SpecialType.System_DateTime,
            PredefinedType.IntPtr => SpecialType.System_IntPtr,
            PredefinedType.UIntPtr => SpecialType.System_UIntPtr,
            _ => SpecialType.None,
        };

    public static PredefinedType ToPredefinedType(this SpecialType specialType)
        => specialType switch
        {
            SpecialType.System_Object => PredefinedType.Object,
            SpecialType.System_Void => PredefinedType.Void,
            SpecialType.System_Boolean => PredefinedType.Boolean,
            SpecialType.System_Char => PredefinedType.Char,
            SpecialType.System_SByte => PredefinedType.SByte,
            SpecialType.System_Byte => PredefinedType.Byte,
            SpecialType.System_Int16 => PredefinedType.Int16,
            SpecialType.System_UInt16 => PredefinedType.UInt16,
            SpecialType.System_Int32 => PredefinedType.Int32,
            SpecialType.System_UInt32 => PredefinedType.UInt32,
            SpecialType.System_Int64 => PredefinedType.Int64,
            SpecialType.System_UInt64 => PredefinedType.UInt64,
            SpecialType.System_Decimal => PredefinedType.Decimal,
            SpecialType.System_Single => PredefinedType.Single,
            SpecialType.System_Double => PredefinedType.Double,
            SpecialType.System_String => PredefinedType.String,
            SpecialType.System_DateTime => PredefinedType.DateTime,
            SpecialType.System_IntPtr => PredefinedType.IntPtr,
            SpecialType.System_UIntPtr => PredefinedType.UIntPtr,
            _ => PredefinedType.None,
        };
}