https://llvm.org/bugs/show_bug.cgi?id=25250
Bug ID: 25250
Summary: Template argument deduction via alias template fails
spuriously
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++14
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
template <typename... T>
using funptr = void(*)(T...);
template <typename... T>
void f(funptr<T...>) {}
template void f(void(*)());
-----------------------------------------------------
The declared function template is ignored: "[…] failed template argument
deduction void f(funptr<T...>) {}".
If we use deduction from a function call instead, the error message suggests
that, although T is correctly deduced(!), there is a substitution failure.
(The above is indeed well-formed though; see CWG 1430 and 1700)
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