http://llvm.org/bugs/show_bug.cgi?id=22191
Bug ID: 22191
Summary: Unexpected error with variadic template function
Product: clang
Version: 3.5
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P
Component: C++11
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
For the following code:
template <typename, typename...>
class C {};
template <typename... V>
void foo(C<V...>);
int main()
{
C<int, double> c;
foo(c);
}
clang 3.5 gives the following error:
test.cpp:10:5: error: no matching function for call to 'foo'
foo(c);
^~~
test.cpp:5:6: note: candidate template ignored: substitution failure [with
V = <>]: too few template arguments for class template 'C'
void foo(C<V...>);
^ ~
I believe this error is bogus. While it's true that instantiating with template
function with [V = <>] would produce an error, there is no reason to perform
that instantiation. The only instantiation that needs to be performed is [V =
<int, double>], and that doesn't produce an error.
GCC 4.9.2 compiles this code successfully.
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