https://bugs.llvm.org/show_bug.cgi?id=43547
Bug ID: 43547
Summary: template alias arguments are not marked as used when
forming a template parameter kind
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: unassignedclangb...@nondot.org
Reporter: metaprogrammingthewo...@gmail.com
CC: blitzrak...@gmail.com, dgre...@apple.com,
erik.pilking...@gmail.com, llvm-bugs@lists.llvm.org,
richard-l...@metafoo.co.uk
The following example does not currently cause a substitution failure (gcc also
seems to exhibit this bug):
//////////
template<class> using int_ = int;
template<class>
struct no_type {};
template<class T = int, int_<typename no_type<T>::type> = 0>
void foo() {}
int main()
{
// Why does this not fail substitution?
foo();
}
//////////
Notably, the following *does* fail substitution in gcc but not in clang:
//////////
template<class> using int_ = int;
template<class>
struct no_type {};
template<class T = int, int_<typename no_type<T>::type>* = nullptr>
void foo() {}
int main()
{
foo();
}
//////////
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