https://bugs.llvm.org/show_bug.cgi?id=51887
Bug ID: 51887
Summary: Unambiguous use of operator==considered ambiguous.
Product: clang
Version: 12.0
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: unassignedclangb...@nondot.org
Reporter: qtom.boeh...@googlemail.com
CC: blitzrak...@gmail.com, dgre...@apple.com,
erik.pilking...@gmail.com, llvm-bugs@lists.llvm.org,
richard-l...@metafoo.co.uk
The following compiles fine with gcc, but with clang gives the error: "use of
overloaded operator '==' is ambiguous".
----------------------------------------------------
#include <cassert>
template<typename T>
bool operator==(T const&, T const&)
{
return false;
}
template<int I>
struct S
{
template<int J>
constexpr
bool operator==(S<J> const&) const
{
return true;
}
};
int main()
{
auto i = S<0>{};
auto j = S<0>{};
assert(i == j);
}
----------------------------------------------------
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