http://llvm.org/bugs/show_bug.cgi?id=20218
Bug ID: 20218
Summary: clang-cl cannot correctly compile std::pair's which
have a function pointer as one of their types
Product: clang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
$ cat test.cpp
template<class T, class U> struct pair {
pair(const T&, const U&);
template<class X, class Y>
pair(X&&, Y&&);
};
template<class>void f();
typedef pair<int,void(*)()> t;
void g() {
t x(0,f<int>);
}
$ clang-cl -c test.cpp
test.cpp(9,5) : error: call to constructor of 't' (aka 'pair<int, void
(*)()>') is ambiguous
t x(0,f<int>);
^ ~~~~~~~~
test.cpp(2,3) : note: candidate constructor
pair(const T&, const U&);
^
test.cpp(4,3) : note: candidate constructor [with X = int, Y = void ()]
pair(X&&, Y&&);
^
1 error generated.
Unfortunately this bug is reduced from std::pair in the Microsoft <utility>
header for Visual C++ 2012. I hit this bug in the latest version of angle
<https://github.com/mozilla/angle/blob/mozilla/src/libGLESv2/renderer/d3d9/formatutils9.cpp#L297>
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