EnterFinallyInstruction.cs

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namespace System.Linq.Expressions.Interpreter;
 
internal sealed class EnterFinallyInstruction : IndexedBranchInstruction
{
    private static readonly EnterFinallyInstruction[] s_cache = new EnterFinallyInstruction[32];
 
    public override string InstructionName => "EnterFinally";
 
    public override int ProducedStack => 2;
 
    public override int ConsumedContinuations => 1;
 
    private EnterFinallyInstruction(int labelIndex)
        : base(labelIndex)
    {
    }
 
    internal static EnterFinallyInstruction Create(int labelIndex)
    {
        if (labelIndex < 32)
        {
            return s_cache[labelIndex] ?? (s_cache[labelIndex] = new EnterFinallyInstruction(labelIndex));
        }
        return new EnterFinallyInstruction(labelIndex);
    }
 
    public override int Run(InterpretedFrame frame)
    {
        if (!frame.IsJumpHappened())
        {
            frame.SetStackDepth(GetLabel(frame).StackDepth);
        }
        frame.PushPendingContinuation();
        frame.RemoveContinuation();
        return 1;
    }
}