EnterExceptionHandlerInstruction.cs

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using System.Diagnostics.CodeAnalysis;
 
namespace System.Linq.Expressions.Interpreter;
 
internal sealed class EnterExceptionHandlerInstruction : Instruction
{
    internal static readonly EnterExceptionHandlerInstruction Void = new EnterExceptionHandlerInstruction(hasValue: false);
 
    internal static readonly EnterExceptionHandlerInstruction NonVoid = new EnterExceptionHandlerInstruction(hasValue: true);
 
    private readonly bool _hasValue;
 
    public override string InstructionName => "EnterExceptionHandler";
 
    public override int ConsumedStack
    {
        get
        {
            if (!_hasValue)
            {
                return 0;
            }
            return 1;
        }
    }
 
    public override int ProducedStack => 1;
 
    private EnterExceptionHandlerInstruction(bool hasValue)
    {
        _hasValue = hasValue;
    }
 
    [ExcludeFromCodeCoverage(Justification = "Known to be a no-op, this instruction is skipped on execution")]
    public override int Run(InterpretedFrame frame)
    {
        return 1;
    }
}