This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 115e. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.

2024-11-11

116. Equivalent and functionally-equivalent function templates

13.7.7.2 [temp.over.link] , paragraphs 5 and 6, describes equivalence and functional equivalence for expressions involving template parameters. As a note in paragraph 5 points out, such expressions may involve type parameters as well as non-type parameters.

Paragraph 7, however, describes the equivalence of function templates only with respect to non-type template parameters. It appears to be unspecified how to determine the equivalence of template functions whose types involve expressions that use template type parameters.

    template <int I> struct S { };

    // The following two declarations are equivalent:
    template <int I> void f(S<I>);
    template <int J> void f(S<J>);

    // The IS doesn't say whether these are equivalent:
    template <class T> void f(S<sizeof(T)>);
    template <class T> void f(S<sizeof(T)>);

Proposed resolution (10/99): Remove the three uses of the words "non-type" in 13.7.7.2 [temp.over.link] paragraph 7.