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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.
// See the LICENSE file in the project root for more information.
using System.Runtime.Serialization;
namespace System.Runtime.CompilerServices
{
// MONO: this file was copied from CoreFX master for NS2.1
/// <summary>
/// Indicates that a switch expression that was non-exhaustive failed to match its input
/// at runtime, e.g. in the C# 8 expression <code>3 switch { 4 => 5 }</code>.
/// The exception optionally contains an object representing the unmatched value.
/// </summary>
[Serializable]
public sealed class SwitchExpressionException : InvalidOperationException
{
public SwitchExpressionException()
: base(SR.Arg_SwitchExpressionException) { }
public SwitchExpressionException(Exception innerException) :
base(SR.Arg_SwitchExpressionException, innerException) { }
public SwitchExpressionException(object unmatchedValue) : this()
{
UnmatchedValue = unmatchedValue;
}
private SwitchExpressionException(SerializationInfo info, StreamingContext context)
: base(info, context)
{
UnmatchedValue = info.GetValue(nameof(UnmatchedValue), typeof(object));
}
public SwitchExpressionException(string message) : base(message) { }
public SwitchExpressionException(string message, Exception innerException)
: base(message, innerException) { }
public object UnmatchedValue { get; }
public override void GetObjectData(SerializationInfo info, StreamingContext context)
{
base.GetObjectData(info, context);
info.AddValue(nameof(UnmatchedValue), UnmatchedValue, typeof(object));
}
public override string Message
{
get
{
#if __MonoCS__
if (UnmatchedValue == null)
#else
if (UnmatchedValue is null)
#endif
{
return base.Message;
}
string valueMessage = SR.Format(SR.SwitchExpressionException_UnmatchedValue, UnmatchedValue.ToString());
return base.Message + Environment.NewLine + valueMessage;
}
}
}
}
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