nxt.nullable_traits

Traits for introspection the nullability (undefinedness) of a type.

If a type is nullable it has a special value reserved in its set of possible which is to indicated that the value is undefined.

Members

Enums

hasMemberNullValue eponymoustemplate hasMemberNullValue(T): Is true iff T is a type with a member null value.
hasNullValue eponymoustemplate hasNullValue(T): Is true iff T is a type with a standardized null (zero address) value.

Functions

isNull bool isNull(T x)
nullify void nullify(T x): Undocumented in source. Be warned that the author may not have intended to support it.

Templates

defaultNullKeyConstantOf template defaultNullKeyConstantOf(T): Default null key of type T,
hasStandardNullValue template hasStandardNullValue(T): Is true iff T is a type with a standardized null (zero address) value.
isNullable template isNullable(T): Is true iff T is type with a predefined undefined (null) value.

Meta

Source

See Source File