ExceptionRegion.cs

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namespace System.Reflection.Metadata;
 
public readonly struct ExceptionRegion
{
    private readonly ExceptionRegionKind _kind;
 
    private readonly int _tryOffset;
 
    private readonly int _tryLength;
 
    private readonly int _handlerOffset;
 
    private readonly int _handlerLength;
 
    private readonly int _classTokenOrFilterOffset;
 
    public ExceptionRegionKind Kind => _kind;
 
    public int TryOffset => _tryOffset;
 
    public int TryLength => _tryLength;
 
    public int HandlerOffset => _handlerOffset;
 
    public int HandlerLength => _handlerLength;
 
    public int FilterOffset
    {
        get
        {
            if (Kind != ExceptionRegionKind.Filter)
            {
                return -1;
            }
            return _classTokenOrFilterOffset;
        }
    }
 
    public EntityHandle CatchType
    {
        get
        {
            if (Kind != 0)
            {
                return default(EntityHandle);
            }
            return new EntityHandle((uint)_classTokenOrFilterOffset);
        }
    }
 
    internal ExceptionRegion(ExceptionRegionKind kind, int tryOffset, int tryLength, int handlerOffset, int handlerLength, int classTokenOrFilterOffset)
    {
        _kind = kind;
        _tryOffset = tryOffset;
        _tryLength = tryLength;
        _handlerOffset = handlerOffset;
        _handlerLength = handlerLength;
        _classTokenOrFilterOffset = classTokenOrFilterOffset;
    }
}