TypeAsInstruction.cs

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namespace System.Linq.Expressions.Interpreter;
 
internal sealed class TypeAsInstruction : Instruction
{
    private readonly Type _type;
 
    public override int ConsumedStack => 1;
 
    public override int ProducedStack => 1;
 
    public override string InstructionName => "TypeAs";
 
    internal TypeAsInstruction(Type type)
    {
        _type = type;
    }
 
    public override int Run(InterpretedFrame frame)
    {
        object obj = frame.Pop();
        frame.Push(_type.IsInstanceOfType(obj) ? obj : null);
        return 1;
    }
 
    public override string ToString()
    {
        return "TypeAs " + _type.ToString();
    }
}