This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 110b. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.

2023-01-15


30. Valid uses of "::template"

Section: 13.3  [temp.names]     Status: TC1     Submitter: Daveed Vandevoorde     Date: 28 May 1998

I have a request for clarification regarding a issue similar to John Wiegley's, but wrt. the ::template syntax. More precisely, where is

    X::template Y
allowed? (It is required for dependent X where Y is a template-id, I believe, but it doesn't seem to be disallowed elsewhere.)

The question also holds for '.template' and '->template'.

Proposed Resolution (04/99): Append to 13.3 [temp.names] paragraph 5:

Furthermore, names of member templates shall not be prefixed by the keyword template if the postfix-expression or qualified-id does not appear in the scope of a template. [Note: just as is the case with the typename prefix, the template prefix is allowed in cases where it is not strictly necessary; i.e., when the expression on the left of the -> or ., or the nested-name-specifier is not dependent on a template-parameter. ]