[Boost-bugs] [Boost C++ Libraries] #11571: Can't compile BOOST_TEST( ..., per_element() ) comparison of vector<string>

Subject: [Boost-bugs] [Boost C++ Libraries] #11571: Can't compile BOOST_TEST( ..., per_element() ) comparison of vector<string>
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-08-23 16:11:55

#11571: Can't compile BOOST_TEST( ..., per_element() ) comparison of vector<string>
-------------------------------------------------+-------------------------
 Reporter:  Tony Lewis <tonyelewis@…>            |      Owner:  rogeeff
     Type:  Bugs                                 |     Status:  new
Milestone:  To Be Determined                     |  Component:  test
  Version:  Boost 1.59.0                         |   Severity:  Problem
 Keywords:                                       |
  test,BOOST_TEST,per_element,collections,string,vector|
-------------------------------------------------+-------------------------
 Thanks for the new BOOST_TEST() and per_element() tools, which look very
 useful.

 Unfortunately, the following simple vector<string> example fails to
 compile under both `g++ -std=c++11` and `clang++ -std=c++11
 -stdlib=libc++`.

 {{{
 #!cpp
 #define BOOST_TEST_MODULE comp_str_mod

 #include <boost/test/included/unit_test.hpp>

 #include <string>
 #include <vector>

 BOOST_AUTO_TEST_CASE( comp_strs ) {
         std::vector<std::string> a{ "ann" };
         std::vector<std::string> b{ "bry" };

         BOOST_TEST( a == b, boost::test_tools::per_element() );
 }
 }}}

 The core part of GCC's error message is:

 {{{
 error: ‘revert’ is not a member of
 ‘boost::test_tools::assertion::op::EQ<std::basic_string<char>,
 std::basic_string<char>, void>’
 }}}

 If I'm doing it wrong, is there any way we can make the compile errors
 and/or documentation clearer about avoiding this? Thanks.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11571>
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