id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
235,mpl::less<> doesn't compile,egladysh,Aleksey Gurtovoy,"{{{
First of all, congratulations with v1.31!

I am having a weird problem when compiling 
mpl/less.hpp in MSVC 7.1

The error message is:
s:\boost\boost_1_31_0\boost\mpl\less.hpp(39) : error 
C2760: syntax error : expected ',' not ';'
        s:\boost\boost_1_31_0\boost\mpl\less.hpp(51) : 
see reference to class template 
instantiation 'boost::mpl::less<T1,T2>' being compiled
s:\boost\boost_1_31_0\boost\mpl\less.hpp(39) : error 
C2144: syntax error : 'const bool' should be preceded 
by '}'
s:\boost\boost_1_31_0\boost\mpl\less.hpp(39) : error 
C2062: type 'const bool' unexpected
s:\boost\boost_1_31_0\boost\mpl\less.hpp(39) : error 
C2238: unexpected token(s) preceding ';'
s:\boost\boost_1_31_0\boost\mpl\less.hpp(42) : error 
C2065: 'value' : undeclared identifier
s:\Projects\notus\notus\libs\src\platform\win32
\notus_traits\winobj.cpp(150) : fatal error C1903: 
unable to recover from previous error(s); stopping 
compilation
*****************

If I change 

    enum
    { 
        msvc71_wknd_ = ( BOOST_MPL_AUX_VALUE_WKND
(T1)::value 
                        < BOOST_MPL_AUX_VALUE_WKND
(T2)::value )
    };

to

    enum
    { 
        msvc71_wknd_ =  BOOST_MPL_AUX_VALUE_WKND
(T1)::value 
                        < BOOST_MPL_AUX_VALUE_WKND
(T2)::value 
    };

everything works. Somehow the parentheses break the 
compiler.

Eugene

}}}",Bugs,closed,,None,None,,None,,