IncrementInstruction.cs

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using System.Dynamic.Utils;
 
namespace System.Linq.Expressions.Interpreter;
 
internal abstract class IncrementInstruction : Instruction
{
    private sealed class IncrementInt16 : IncrementInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            object obj = frame.Pop();
            if (obj == null)
            {
                frame.Push(null);
            }
            else
            {
                frame.Push((short)(1 + (short)obj));
            }
            return 1;
        }
    }
 
    private sealed class IncrementInt32 : IncrementInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            object obj = frame.Pop();
            if (obj == null)
            {
                frame.Push(null);
            }
            else
            {
                frame.Push(1 + (int)obj);
            }
            return 1;
        }
    }
 
    private sealed class IncrementInt64 : IncrementInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            object obj = frame.Pop();
            if (obj == null)
            {
                frame.Push(null);
            }
            else
            {
                frame.Push(1 + (long)obj);
            }
            return 1;
        }
    }
 
    private sealed class IncrementUInt16 : IncrementInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            object obj = frame.Pop();
            if (obj == null)
            {
                frame.Push(null);
            }
            else
            {
                frame.Push((ushort)(1 + (ushort)obj));
            }
            return 1;
        }
    }
 
    private sealed class IncrementUInt32 : IncrementInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            object obj = frame.Pop();
            if (obj == null)
            {
                frame.Push(null);
            }
            else
            {
                frame.Push(1 + (uint)obj);
            }
            return 1;
        }
    }
 
    private sealed class IncrementUInt64 : IncrementInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            object obj = frame.Pop();
            if (obj == null)
            {
                frame.Push(null);
            }
            else
            {
                frame.Push(1 + (ulong)obj);
            }
            return 1;
        }
    }
 
    private sealed class IncrementSingle : IncrementInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            object obj = frame.Pop();
            if (obj == null)
            {
                frame.Push(null);
            }
            else
            {
                frame.Push(1f + (float)obj);
            }
            return 1;
        }
    }
 
    private sealed class IncrementDouble : IncrementInstruction
    {
        public override int Run(InterpretedFrame frame)
        {
            object obj = frame.Pop();
            if (obj == null)
            {
                frame.Push(null);
            }
            else
            {
                frame.Push(1.0 + (double)obj);
            }
            return 1;
        }
    }
 
    private static Instruction s_Int16;
 
    private static Instruction s_Int32;
 
    private static Instruction s_Int64;
 
    private static Instruction s_UInt16;
 
    private static Instruction s_UInt32;
 
    private static Instruction s_UInt64;
 
    private static Instruction s_Single;
 
    private static Instruction s_Double;
 
    public override int ConsumedStack => 1;
 
    public override int ProducedStack => 1;
 
    public override string InstructionName => "Increment";
 
    private IncrementInstruction()
    {
    }
 
    public static Instruction Create(Type type)
    {
        return type.GetNonNullableType().GetTypeCode() switch
        {
            TypeCode.Int16 => s_Int16 ?? (s_Int16 = new IncrementInt16()), 
            TypeCode.Int32 => s_Int32 ?? (s_Int32 = new IncrementInt32()), 
            TypeCode.Int64 => s_Int64 ?? (s_Int64 = new IncrementInt64()), 
            TypeCode.UInt16 => s_UInt16 ?? (s_UInt16 = new IncrementUInt16()), 
            TypeCode.UInt32 => s_UInt32 ?? (s_UInt32 = new IncrementUInt32()), 
            TypeCode.UInt64 => s_UInt64 ?? (s_UInt64 = new IncrementUInt64()), 
            TypeCode.Single => s_Single ?? (s_Single = new IncrementSingle()), 
            TypeCode.Double => s_Double ?? (s_Double = new IncrementDouble()), 
            _ => throw ContractUtils.Unreachable, 
        };
    }
}