using System;
using System.Collections.Generic;
using System.Reflection.Emit;
using System.Text;
using Sunweaver.VM;

namespace Sunweaver.Commands
{
    [Attributes.BasePair("Duplicate the top value of the boolean stack.")]
    public class dub : Abstracts.UnaryBooleanLogic
    {
        public override void Operation(bool a)
        {
            VM.BoolStack.Push(a);
            VM.BoolStack.Push(a);
        }

        public override void CompileOperation(ILGenerator il, Locals locals)
        {
            il.Emit(OpCodes.Ldloc, locals[typeof(VirtualMachine)]);
            il.Emit(OpCodes.Dup);

            il.Emit(OpCodes.Ldfld, typeof(VirtualMachine).GetField("BoolStack"));
            il.Emit(OpCodes.Ldloc, locals[typeof(bool), 0]);
            il.Emit(OpCodes.Call, typeof(BoolStack).GetMethod("Push"));

            il.Emit(OpCodes.Ldfld, typeof(VirtualMachine).GetField("BoolStack"));
            il.Emit(OpCodes.Ldloc, locals[typeof(bool), 0]);
            il.Emit(OpCodes.Call, typeof(BoolStack).GetMethod("Push"));
        }
    }
}