Re: [boost] Formal Review Request: TypeErasure

Subject: Re: [boost] Formal Review Request: TypeErasure
From: Larry Evans (cppljevans_at_[hidden])
Date: 2012-06-19 09:42:54

On 05/22/12 15:34, Steven Watanabe wrote:
[snip]
> The library is available in the Boost Sandbox at
> http://svn.boost.org/svn/boost/sandbox/type_erasure/

The type_erasure version I have is:

~/prog_dev/boost-svn/ro/boost_1_49_0/sandbox/ro/type_erasure/type_erasure $
svn update
At revision 79008.

However, compiling multi.cpp with gcc4.8 (2012-04-22)
gives a uninitialized constexpr error.

compilation; default-directory:
"~/prog_dev/boost-svn/ro/boost_1_49_0/sandbox/ro/type_erasure/type_erasure/libs/type_erasure/example/"
-*-
Compilation started at Tue Jun 19 08:36:12

bjam multi
sh: icpc: not found
...patience...
...found 550 targets...
...updating 4 targets...
common.mkdir bin/multi.test/gcc-4.8v
common.mkdir bin/multi.test/gcc-4.8v/debug
gcc.compile.c++ bin/multi.test/gcc-4.8v/debug/multi.o
In file included from ../../../boost/type_erasure/binding.hpp:28:0,
                 from ../../../boost/type_erasure/any.hpp:39,
                 from multi.cpp:11:
../../../boost/type_erasure/detail/vtable.hpp:155:28: error: constexpr
static data member 'value' must have an initializer
     static constexpr Table value;
                            ^
../../../boost/type_erasure/detail/vtable.hpp:159:52: error:
redeclaration 'boost::type_erasure::detail::vtable_init<Table,
T>::value' differs in 'constexpr'
 constexpr Table vtable_init<Table, T...>::value(T::value...);
                                                    ^
../../../boost/type_erasure/detail/vtable.hpp:155:28: error: from
previous declaration 'boost::type_erasure::detail::vtable_init<Table,
T>::value'
     static constexpr Table value;
                            ^
../../../boost/type_erasure/detail/vtable.hpp:159:52: error:
'boost::type_erasure::detail::vtable_init<Table, T>::value' declared
'constexpr' outside its class
 constexpr Table vtable_init<Table, T...>::value(T::value...);
                                                    ^
../../../boost/type_erasure/detail/vtable.hpp:159:52: error: declaration
of 'const Table boost::type_erasure::detail::vtable_init<Table,
T>::value' outside of class is not definition [-fpermissive]
 constexpr Table vtable_init<Table, T...>::value(T::value...);
                                                    ^

    "/home/evansl/download/gcc/4.8-20120422/install/bin/g++"
-ftemplate-depth-128 -Wl,-rpath -std=gnu++11 -DCXX0X_VARIADIC_TEMPLATES
-DBOOST_USE_MPL_VARIADIC_TEMPLATES -O0 -fno-inline -Wall -g -fPIC
-I"../../.." -I"/home/evansl/prog_dev/boost-svn/ro/boost_1_49_0" -c -o
"bin/multi.test/gcc-4.8v/debug/multi.o" "multi.cpp"

...failed gcc.compile.c++ bin/multi.test/gcc-4.8v/debug/multi.o...