Created on 2014-07-17.00:00:00 last changed 46 months ago
Rationale (February, 2021):
The specification, now found in 13.8.1 [temp.res.general], particularly in bullet 8.5, is clearer in this regard.
Paragraphs 3-4 of 13.8 [temp.res] read, in part,
When a qualified-id is intended to refer to a type that is not a member of the current instantiation (13.8.3.2 [temp.dep.type]) and its nested-name-specifier refers to a dependent type, it shall be prefixed by the keyword typename, forming a typename-specifier. If the qualified-id in a typename-specifier does not denote a type, the program is ill-formed.
If a specialization of a template is instantiated for a set of template-arguments such that the qualified-id prefixed by typename does not denote a type, the specialization is ill-formed.
The former requirement is intended to apply to the definition and the latter to an instantiation of a template, but that intent is not completely clear, leading to the perception that they are redundant.
| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2021-02-17 00:00:00 | admin | set | messages: + msg6514 |
| 2021-02-17 00:00:00 | admin | set | status: open -> nad |
| 2014-07-17 00:00:00 | admin | create | |