[Boost-bugs] [Boost C++ Libraries] #11941: Use of overloaded operator== in BOOST_TEST() is ambiguous

Subject: [Boost-bugs] [Boost C++ Libraries] #11941: Use of overloaded operator== in BOOST_TEST() is ambiguous
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2016-01-27 11:50:53

#11941: Use of overloaded operator== in BOOST_TEST() is ambiguous
------------------------------+---------------------
 Reporter:  kamo.tanabota@…   |      Owner:  rogeeff
     Type:  Bugs              |     Status:  new
Milestone:  To Be Determined  |  Component:  test
  Version:  Boost 1.59.0      |   Severity:  Problem
 Keywords:                    |
------------------------------+---------------------
 I'm unable to compile the following code due to ambiguity of opertor==
 overloads.

 {{{
 #define BOOST_TEST_MODULE mytest
 #include <boost/test/included/unit_test.hpp>

 struct S {
     template <class T>
     S(T&&) {}
 };

 bool operator==(S const&, S const&) { return true; }

 template <class T>
 bool operator==(T const&, S const&) { return true; }

 BOOST_AUTO_TEST_CASE(test1)
 {
     auto const s = S{"hoge"};
     BOOST_TEST(s == 4);
 }

 }}}

 This seems to happen if there is an overload taking a template parameter
 for the left operand.

 Using boost::iterator_range, instead of the class S, results in same
 issue.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11941>
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