public override IList <CustomAttributeData> GetCustomAttributesData()
{
return(RuntimeCustomAttributeData.GetCustomAttributesInternal(this));
}
// returns DBNull.Value if the parameter doesn't have a default value
private object?GetDefaultValueInternal(bool raw)
{
Debug.Assert(!m_noMetadata);
if (m_noDefaultValue)
{
return(DBNull.Value);
}
object?defaultValue = null;
// Why check the parameter type only for DateTime and only for the ctor arguments?
// No check on the parameter type is done for named args and for Decimal.
// We should move this after MdToken.IsNullToken(m_tkParamDef) and combine it
// with the other custom attribute logic. But will that be a breaking change?
// For a DateTime parameter on which both an md constant and a ca constant are set,
// which one should win?
if (ParameterType == typeof(DateTime))
{
if (raw)
{
CustomAttributeTypedArgument value =
RuntimeCustomAttributeData.Filter(
RuntimeCustomAttributeData.GetCustomAttributes(this), typeof(DateTimeConstantAttribute), 0);
if (value.ArgumentType != null)
{
return(new DateTime((long)value.Value !));
}
}
else
{
object[] dt = GetCustomAttributes(typeof(DateTimeConstantAttribute), false);
if (dt != null && dt.Length != 0)
{
return(((DateTimeConstantAttribute)dt[0]).Value);
}
}
}
#region Look for a default value in metadata
if (!MdToken.IsNullToken(m_tkParamDef))
{
// This will return DBNull.Value if no constant value is defined on m_tkParamDef in the metadata.
defaultValue = MdConstant.GetValue(m_scope, m_tkParamDef, ParameterType.TypeHandle, raw);
}
#endregion
if (defaultValue == DBNull.Value)
{
#region Look for a default value in the custom attributes
if (raw)
{
foreach (CustomAttributeData attr in CustomAttributeData.GetCustomAttributes(this))
{
Type?attrType = attr.Constructor.DeclaringType;
if (attrType == typeof(DateTimeConstantAttribute))
{
defaultValue = GetRawDateTimeConstant(attr);
}
else if (attrType == typeof(DecimalConstantAttribute))
{
defaultValue = GetRawDecimalConstant(attr);
}
else if (attrType !.IsSubclassOf(s_CustomConstantAttributeType))
{
defaultValue = GetRawConstant(attr);
}
}
}
else
{
object[] CustomAttrs = GetCustomAttributes(s_CustomConstantAttributeType, false);
if (CustomAttrs.Length != 0)
{
defaultValue = ((CustomConstantAttribute)CustomAttrs[0]).Value;
}
else
{
CustomAttrs = GetCustomAttributes(s_DecimalConstantAttributeType, false);
if (CustomAttrs.Length != 0)
{
defaultValue = ((DecimalConstantAttribute)CustomAttrs[0]).Value;
}
}
}
#endregion
}
if (defaultValue == DBNull.Value)
{
m_noDefaultValue = true;
}
return(defaultValue);
}
