ExceptionHandler.cs

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using System.Globalization;
using System.Runtime.CompilerServices;
 
namespace System.Linq.Expressions.Interpreter;
 
internal sealed class ExceptionHandler
{
    private readonly Type _exceptionType;
 
    public readonly int LabelIndex;
 
    public readonly int HandlerStartIndex;
 
    public readonly int HandlerEndIndex;
 
    public readonly ExceptionFilter Filter;
 
    internal ExceptionHandler(int labelIndex, int handlerStartIndex, int handlerEndIndex, Type exceptionType, ExceptionFilter filter)
    {
        LabelIndex = labelIndex;
        _exceptionType = exceptionType;
        HandlerStartIndex = handlerStartIndex;
        HandlerEndIndex = handlerEndIndex;
        Filter = filter;
    }
 
    public bool Matches(Type exceptionType)
    {
        return _exceptionType.IsAssignableFrom(exceptionType);
    }
 
    public override string ToString()
    {
        IFormatProvider invariantCulture = CultureInfo.InvariantCulture;
        DefaultInterpolatedStringHandler handler = new DefaultInterpolatedStringHandler(13, 3, invariantCulture);
        handler.AppendLiteral("catch (");
        handler.AppendFormatted(_exceptionType.Name);
        handler.AppendLiteral(") [");
        handler.AppendFormatted(HandlerStartIndex);
        handler.AppendLiteral("->");
        handler.AppendFormatted(HandlerEndIndex);
        handler.AppendLiteral("]");
        return string.Create(invariantCulture, ref handler);
    }
}