using System; using System.Reflection; using System.Runtime.CompilerServices; namespace DotNext { [System.Runtime.CompilerServices.NullableContext(1)] [System.Runtime.CompilerServices.Nullable(0)] internal static class EnumConverter<[System.Runtime.CompilerServices.Nullable(0)] TInput, [System.Runtime.CompilerServices.Nullable(0)] TOutput> where TInput : struct, IConvertible, IComparable, IFormattable where TOutput : struct, IConvertible, IComparable, IFormattable { [System.Runtime.CompilerServices.Nullable(0)] private static readonly IntPtr Converter; unsafe static EnumConverter() { string text; switch (Type.GetTypeCode(typeof(TOutput))) { case TypeCode.Byte: text = "ToByte"; break; case TypeCode.SByte: text = "ToSByte"; break; case TypeCode.Int16: text = "ToInt16"; break; case TypeCode.UInt16: text = "ToUInt16"; break; case TypeCode.Int32: text = "ToInt32"; break; case TypeCode.UInt32: text = "ToUInt32"; break; case TypeCode.Int64: text = "ToInt64"; break; case TypeCode.UInt64: text = "ToUInt64"; break; case TypeCode.Boolean: text = "ToBoolean"; break; case TypeCode.Single: text = "ToSingle"; break; case TypeCode.Double: text = "ToDouble"; break; case TypeCode.Char: text = "ToChar"; break; case TypeCode.Decimal: text = "ToDecimal"; break; case TypeCode.DateTime: text = "ToDateTime"; break; default: text = "<unknown>"; break; } string name = text; Type type = typeof(TInput); if (type.IsEnum) type = type.GetEnumUnderlyingType(); MethodInfo method = typeof(Convert).GetMethod(name, new Type[1] { type }); if ((object)method == null) Converter = (IntPtr)(void*); else Converter = (IntPtr)(void*)method.MethodHandle.GetFunctionPointer(); } [MethodImpl(MethodImplOptions.AggressiveInlining)] [System.Runtime.CompilerServices.NullableContext(0)] internal static TOutput Convert(TInput value) { if (Unsafe.SizeOf<TInput>() != Unsafe.SizeOf<TOutput>()) { IntPtr converter = Converter; return (TOutput); } return Unsafe.As<TInput, TOutput>(ref value); } } }