[boost] [Config] Failure with Clang-3.4 in C++14 mode

Subject: [boost] [Config] Failure with Clang-3.4 in C++14 mode
From: Ben Pope (benpope81_at_[hidden])
Date: 2013-12-11 02:38:43

  "clang++-3.4" -c -x c++ -std=c++1y -stdlib=libc++ -O0 -g -fno-inline
-Wall -g -fPIC  -DBOOST_ALL_NO_LIB=1 -I".." -o
"/home/ben/development/boost/test/build/results/boost/bin.v2/libs/config/test/config_test.test/clang-linux-3.4~c14_libc++/debug/config_test.o"
"../libs/config/test/config_test.cpp"

In file included from ../libs/config/test/config_test.cpp:76:
../libs/config/test/boost_no_constexpr.ipp:37:3: error: no viable
conversion from 'const boost_no_cxx11_constexpr::A' to 'int'
X<a> xx; // OK: unique conversion to int
  ^
../libs/config/test/boost_no_constexpr.ipp:27:14: note: candidate
function not viable: 'this' argument has type 'const
boost_no_cxx11_constexpr::A', but method is not marked const
   constexpr operator int() { return val; }
             ^
../libs/config/test/boost_no_constexpr.ipp:28:14: note: candidate
function not viable: 'this' argument has type 'const
boost_no_cxx11_constexpr::A', but method is not marked const
   constexpr operator long() { return 43; }
             ^
In file included from ../libs/config/test/config_test.cpp:231:
../libs/config/test/boost_no_cxx11_user_lit.ipp:64:15: error: invalid
operands to binary expression ('const
boost_no_cxx11_user_defined_literals::my_literal' and
'boost_no_cxx11_user_defined_literals::my_literal')
   return ((a == my_literal(0x23)) && (b == my_literal(9))) ? 0 : 1;
            ~ ^  ~~~~~~~~~~~~~~~~
../libs/config/test/boost_no_cxx11_user_lit.ipp:22:19: note: candidate
function not viable: 'this' argument has type 'const
boost_no_cxx11_user_defined_literals::my_literal', but method is not
marked const
   constexpr bool operator==(const my_literal& a) { return val == a.val; }
                  ^
../libs/config/test/boost_no_cxx11_user_lit.ipp:64:42: error: invalid
operands to binary expression ('const
boost_no_cxx11_user_defined_literals::my_literal' and
'boost_no_cxx11_user_defined_literals::my_literal')
   return ((a == my_literal(0x23)) && (b == my_literal(9))) ? 0 : 1;
                                       ~ ^  ~~~~~~~~~~~~~
../libs/config/test/boost_no_cxx11_user_lit.ipp:22:19: note: candidate
function not viable: 'this' argument has type 'const
boost_no_cxx11_user_defined_literals::my_literal', but method is not
marked const
   constexpr bool operator==(const my_literal& a) { return val == a.val; }
                  ^

          ^
6 warnings and 3 errors generated.

Looks like a simple fix of marking the members const.
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3598.html

http://www.boost.org/development/tests/trunk/developer/output/BP%20x86_64%20C++11-boost-bin-v2-libs-config-test-config_test-test-clang-linux-3-4~c14_libc++-debug.html

Ben