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private InternalGetUnderlyingType ( |
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| enumType | ||
| Résultat | ||
public sealed override Array GetEnumValues()
{
if (!IsEnum)
{
throw new ArgumentException(SR.Arg_MustBeEnum, "enumType");
}
Array values = Enum.GetEnumInfo(this).ValuesAsUnderlyingType;
int count = values.Length;
// Without universal shared generics, chances are slim that we'll have the appropriate
// array type available. Offer an escape hatch that avoids a MissingMetadataException
// at the cost of a small appcompat risk.
Array result;
if (AppContext.TryGetSwitch("Switch.System.Enum.RelaxedGetValues", out bool isRelaxed) && isRelaxed)
{
result = Array.CreateInstance(Enum.InternalGetUnderlyingType(this), count);
}
else
{
result = Array.CreateInstance(this, count);
}
Array.Copy(values, result, values.Length);
return(result);
}
public sealed override bool IsEnumDefined(object value)
{
if (value == null)
{
throw new ArgumentNullException(nameof(value));
}
if (!IsEnum)
{
throw new ArgumentException(SR.Arg_MustBeEnum);
}
if (value is string valueAsString)
{
EnumInfo enumInfo = Enum.GetEnumInfo(this);
foreach (string name in enumInfo.Names)
{
if (valueAsString == name)
{
return(true);
}
}
return(false);
}
else
{
ulong rawValue;
if (!Enum.TryGetUnboxedValueOfEnumOrInteger(value, out rawValue))
{
if (Type.IsIntegerType(value.GetType()))
{
throw new ArgumentException(SR.Format(SR.Arg_EnumUnderlyingTypeAndObjectMustBeSameType, value.GetType(), Enum.InternalGetUnderlyingType(this)));
}
else
{
throw new InvalidOperationException(SR.InvalidOperation_UnknownEnumType);
}
}
if (value is Enum)
{
if (!Enum.ValueTypeMatchesEnumType(this, value))
{
throw new ArgumentException(SR.Format(SR.Arg_EnumAndObjectMustBeSameType, value.GetType(), this));
}
}
else
{
Type underlyingType = Enum.InternalGetUnderlyingType(this);
if (!(underlyingType.TypeHandle.ToEETypePtr() == value.EETypePtr))
{
throw new ArgumentException(SR.Format(SR.Arg_EnumUnderlyingTypeAndObjectMustBeSameType, value.GetType(), underlyingType));
}
}
return(Enum.GetEnumName(this, rawValue) != null);
}
}
public override Type GetEnumUnderlyingType()
{
if (!IsActualEnum)
{
throw new ArgumentException(SR.Arg_MustBeEnum, "enumType");
}
return(Enum.InternalGetUnderlyingType(this));
}
public override bool IsEnumDefined(object value)
{
if (value == null)
{
throw new ArgumentNullException(nameof(value));
}
if (!IsEnum)
{
throw new ArgumentException(SR.Arg_MustBeEnum, "enumType");
}
// Check if both of them are of the same type
RuntimeType valueType = (RuntimeType)value.GetType();
// If the value is an Enum then we need to extract the underlying value from it
if (valueType.IsEnum)
{
if (!valueType.IsEquivalentTo(this))
{
throw new ArgumentException(SR.Format(SR.Arg_EnumAndObjectMustBeSameType, valueType, this));
}
valueType = (RuntimeType)valueType.GetEnumUnderlyingType();
}
// If a string is passed in
if (valueType == StringType)
{
// Get all of the Fields, calling GetHashEntry directly to avoid copying
string[] names = Enum.InternalGetNames(this);
return(Array.IndexOf(names, value) >= 0);
}
// If an enum or integer value is passed in
if (IsIntegerType(valueType))
{
RuntimeType underlyingType = Enum.InternalGetUnderlyingType(this);
if (underlyingType != valueType)
{
throw new ArgumentException(SR.Format(SR.Arg_EnumUnderlyingTypeAndObjectMustBeSameType, valueType, underlyingType));
}
ulong[] ulValues = Enum.InternalGetValues(this);
ulong ulValue = Enum.ToUInt64(value);
return(Array.BinarySearch(ulValues, ulValue) >= 0);
}
else
{
throw new InvalidOperationException(SR.InvalidOperation_UnknownEnumType);
}
}
protected override TypeCode GetTypeCodeImpl()
{
TypeCode typeCode = Cache.TypeCode;
if (typeCode != TypeCode.Empty)
{
return(typeCode);
}
CorElementType corElementType = RuntimeTypeHandle.GetCorElementType(this);
switch (corElementType)
{
case CorElementType.ELEMENT_TYPE_BOOLEAN:
typeCode = TypeCode.Boolean; break;
case CorElementType.ELEMENT_TYPE_CHAR:
typeCode = TypeCode.Char; break;
case CorElementType.ELEMENT_TYPE_I1:
typeCode = TypeCode.SByte; break;
case CorElementType.ELEMENT_TYPE_U1:
typeCode = TypeCode.Byte; break;
case CorElementType.ELEMENT_TYPE_I2:
typeCode = TypeCode.Int16; break;
case CorElementType.ELEMENT_TYPE_U2:
typeCode = TypeCode.UInt16; break;
case CorElementType.ELEMENT_TYPE_I4:
typeCode = TypeCode.Int32; break;
case CorElementType.ELEMENT_TYPE_U4:
typeCode = TypeCode.UInt32; break;
case CorElementType.ELEMENT_TYPE_I8:
typeCode = TypeCode.Int64; break;
case CorElementType.ELEMENT_TYPE_U8:
typeCode = TypeCode.UInt64; break;
case CorElementType.ELEMENT_TYPE_R4:
typeCode = TypeCode.Single; break;
case CorElementType.ELEMENT_TYPE_R8:
typeCode = TypeCode.Double; break;
#if !CORECLR
case CorElementType.ELEMENT_TYPE_STRING:
typeCode = TypeCode.String; break;
#endif
case CorElementType.ELEMENT_TYPE_VALUETYPE:
if (ReferenceEquals(this, typeof(decimal)))
{
typeCode = TypeCode.Decimal;
}
else if (ReferenceEquals(this, typeof(DateTime)))
{
typeCode = TypeCode.DateTime;
}
else if (IsActualEnum)
{
typeCode = GetTypeCode(Enum.InternalGetUnderlyingType(this));
}
else
{
typeCode = TypeCode.Object;
}
break;
default:
#if CORECLR
// GetSignatureCorElementType returns E_T_CLASS for E_T_STRING
if (ReferenceEquals(this, typeof(string)))
{
typeCode = TypeCode.String;
break;
}
#endif
if (ReferenceEquals(this, typeof(DBNull)))
{
typeCode = TypeCode.DBNull;
break;
}
typeCode = TypeCode.Object;
break;
}
Cache.TypeCode = typeCode;
return(typeCode);
}
/// <summary>
/// Retrieves an array of the values of the underlying type constants in a specified enumeration type.
/// </summary>
/// <remarks>
/// This method can be used to get enumeration values when creating an array of the enumeration type is challenging.
/// For example, <see cref="T:System.Reflection.MetadataLoadContext" /> or on a platform where runtime codegen is not available.
/// </remarks>
/// <returns>An array that contains the values of the underlying type constants in enumType.</returns>
/// <exception cref="ArgumentException">
/// Thrown when the type is not Enum
/// </exception>
public override Array GetEnumValuesAsUnderlyingType()
{
if (!IsActualEnum)
{
throw new ArgumentException(SR.Arg_MustBeEnum, "enumType");
}
// Get all of the values
ulong[] values = Enum.InternalGetValues(this);
switch (RuntimeTypeHandle.GetCorElementType(Enum.InternalGetUnderlyingType(this)))
{
case CorElementType.ELEMENT_TYPE_U1:
{
var ret = new byte[values.Length];
for (int i = 0; i < values.Length; i++)
{
ret[i] = (byte)values[i];
}
return(ret);
}
case CorElementType.ELEMENT_TYPE_U2:
{
var ret = new ushort[values.Length];
for (int i = 0; i < values.Length; i++)
{
ret[i] = (ushort)values[i];
}
return(ret);
}
case CorElementType.ELEMENT_TYPE_U4:
{
var ret = new uint[values.Length];
for (int i = 0; i < values.Length; i++)
{
ret[i] = (uint)values[i];
}
return(ret);
}
case CorElementType.ELEMENT_TYPE_U8:
{
return((Array)values.Clone());
}
case CorElementType.ELEMENT_TYPE_I1:
{
var ret = new sbyte[values.Length];
for (int i = 0; i < values.Length; i++)
{
ret[i] = (sbyte)values[i];
}
return(ret);
}
case CorElementType.ELEMENT_TYPE_I2:
{
var ret = new short[values.Length];
for (int i = 0; i < values.Length; i++)
{
ret[i] = (short)values[i];
}
return(ret);
}
case CorElementType.ELEMENT_TYPE_I4:
{
var ret = new int[values.Length];
for (int i = 0; i < values.Length; i++)
{
ret[i] = (int)values[i];
}
return(ret);
}
case CorElementType.ELEMENT_TYPE_I8:
{
var ret = new long[values.Length];
for (int i = 0; i < values.Length; i++)
{
ret[i] = (long)values[i];
}
return(ret);
}
default:
throw new InvalidOperationException(SR.InvalidOperation_UnknownEnumType);
}
}
