[llvm-bugs] [Bug 41990] New: c++2a: unable to resolve traditional comparison operators from three-way comparison operator

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https://bugs.llvm.org/show_bug.cgi?id=41990

            Bug ID: 41990
           Summary: c++2a: unable to resolve traditional comparison
                    operators from three-way comparison operator
           Product: clang
           Version: 8.0
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++2a
          Assignee: unassignedclangbugs at nondot.org
          Reporter: development at jordi.vilar.cat
                CC: blitzrakete at gmail.com, erik.pilkington at gmail.com,
                    llvm-bugs at lists.llvm.org, richard-llvm at metafoo.co.uk

The following code, compiled with clang-8 -std=c++2a, fails with:
  error: invalid operands to binary expression ('type' and 'type')

#include <compare>

struct type
{
    friend constexpr std::strong_equality operator<=>(const type&, const type&)
noexcept { return std::strong_equality::equal; };
};

constexpr auto test = type{} == type{};

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