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Re: C++11: Template argument deduction, partial ordering, and trailing parameter packs

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Hello!

Christoph Schulz wrote:

> Hello,
>
> I read §14.8.2.1, §14.8.2.4, and §14.8.2.5 multiple times but did not find
> a convincing argumentation why the second of the following two function
> templates is more specialized for the given argument than the first one:
> [...]

I just learned that clang++ (version 3.7.0) barks at the code:

main.cpp:21:18: error: call to 'f' is ambiguous
    std::cout << f(X<1>{}) << std::endl; // selects #2
                 ^
main.cpp:9:5: note: candidate function [with I = 1, Ints = <>]
int f(X<I, Ints...> x) {
    ^
main.cpp:15:5: note: candidate function [with I = 1]
int f(X<I>) {
    ^
1 error generated.

Perhaps my assumption that this code is ambiguous is indeed correct.
Nevertheless I would like to see it confirmed by some other C++ expert(s)
;-)


Best regards,

--
Christoph Schulz


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C++11: Template argument deduction, partial ordering, and trailing parameter packs Christoph Schulz <develop@kristov.de> - 2016-02-20 15:19 -0600
  Re: C++11: Template argument deduction, partial ordering, and  trailing parameter packs Christof Meerwald <NOSPAM-seeMySig+ul15+@usenet.cmeerw.org> - 2016-03-16 01:07 -0600
  Re: C++11: Template argument deduction, partial ordering, and trailing parameter packs Christoph Schulz <develop@kristov.de> - 2016-03-16 01:07 -0600

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