private static bool ValueExists(TEnumeration[] values, TEnum value, int count, EqualityComparer <TEnum> eq)
{
AZAssert.NotNullInternal(values, nameof(values));
AZAssert.NotNullInternal(eq, nameof(eq));
AZAssert.BoundsInternal(values, count, nameof(count), true);
for (int i = 0; i < count; ++i)
{
if (eq.Equals(values[i].EnumValue, value))
{
return(true);
}
}
return(false);
}
// lastVal is the instance that is calling InitializeNames (from its ctor). (lastVal == values[values.Length - 1])
private static void InitializeInfoAndNames(TEnumeration lastVal)
{
AZAssert.NotNullInternal(lastVal, nameof(lastVal));
AZAssert.NotNullInternal(fields, nameof(fields));
string err = null;
var t = typeof(TEnumeration);
FieldInfo[] fieldArray = fields;
for (int i = 0; i < fieldArray.Length; ++i)
{
var f = fieldArray[i];
if (!f.IsInitOnly || f.FieldType != t)
{
err = ErrPrefix + "." + f.Name + ERR_FIELD_TYPE;
break;
}
var val = lastVal.GetStaticFieldValue(f);
if (val == null) // we expect exactly one field to be null: the last field in textual order (i.e. the field that corresponds to the instance that is calling this method).
{
val = lastVal; // if this happens more than once it means that not all fields have initializers, but then TryInitializeName will fail below, so it will get caught.
}
if (!val.TryInitializeName(f.Name)) // TryInitializeName fails if name is already set, and since values.Length == fields.Length this ensures uniqueness!
{
err = ErrPrefix + "." + f.Name + ERR_FIELD_VALUE;
break;
}
}
if (err != null)
{
Debug.Assert(false, err);
throw new Exception(err);
}
fields = null; // fields array not needed anymore.
ev_instance = new EnumValues <TEnumeration>(values); // info init.
// late initialization completed successfully.
}
// internal instantiation only!
internal EnumValues(TEnumeration[] values)
{
AZAssert.NotNullInternal(values, nameof(values));
this.values = values;
}