15
Library introduction
[library]
15.3
Definitions
[definitions]
15.3.20
program-defined type
[defns.prog.def.type]
class type or enumeration type that is not part of the C++ standard library and not defined by the implementation, or an instantiation of a program-defined specialization
[
Note
:
Types defined by the implementation include extensions (
[intro.compliance]
) and internal types used by the library
.
—
end note
]