Maybe<T>.None == null returns false

Consider the following:

Maybe<Class> maybeClassFromEmpty = null;
	
Console.WriteLine(maybeClassFromEmpty == null); // returns false

Considering that Maybe<T> implicitly converts null to Maybe<T>.None I’d expect comparing it with null to return true

[hankovich]

@pfitoussi

Maybe is a struct, it would never be null

That’s not right in 100% cases. You’re right that value type could never be null, however value type can provide it’s own implemetation of == (which can return true).

Let me summarize:

MyStruct value = ...
var result = value == null; // can return true, depends on == operator
var result = value is null; // will never return true, calls object.ReferenceEquals(object, object) under the hood, i.e. calls ReferenceEquals((object)value, null) and boxed struct will never be null

[petre-c]

Thank you!