I'll have a look at this when I get a chance. Romain
Le 25/01/11 02:58, Dominick Samperi a écrit :
I reported a problem in another thread that I thought only surfaced under Windows, but I was wrong (see Subject line). The problem also appears under GCC 4.5+, and it appears that somebody already noticed problems with this version of GCC and introduced the compiler define IS_GCC_450_OR_LATER to navigate around the problematic code. After some debugging, and based on the links that I posted in the original thread, the problem seems to be due to the more recent versions of the compilers GCC 4.5+ and VC++ 2010 introducing support for new reference features that will not become official until C++0x is released later this year (or in 2012). A partial fix that enables my test drivers to work is to replace reference variables by non-references variables in constructors like Plus_Vector_Vector. Specifically, the declarations const LHS_EXT& lhs; const RHS_EXT& rhs; should be replaced with const LHS_EXT lhs; const RHS_EXT rhs; This is a partial fix because I have not checked that this doesn't cause other problems with expression evaluation, but it is a start... The problem with the original code is that the references lhs and rhs are initialized to point to a temporary that disappears when the constructor exits. This work-around simply saves a copy instead of saving a reference. Dominick
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