Re: Still cannot build cvs

[Angus Leeming]

On Thu, 12 Oct 2000, Jean-Marc Lasgouttes wrote:
> So, even when trying to ignore the vsnprntf problem, it seems I cannot
> use the brand new compare_memfun thingie. Since the error message (or
> rather the template definition) is chinese to me, I'd appreciate a fix.
>
> mycxx -DHAVE_CONFIG_H -I. -I../../lyx-devel/src -I. -I.. -I../../lyx-devel
> -I../../lyx-devel/boost    -I../../lyx-devel/src/cheaders 
> -I/afs/rocq/home/meval/common/include  -I/usr/local/include     -g0 -c
> ../../lyx-devel/src/MenuBackend.C cxx: Error:
> ../../lyx-devel/src/MenuBackend.C, line 404: no instance of function
> template "compare_memfun" matches the argument list argument types are:
> (const std::string &(Menu::*)() const, const std::string)
>                        compare_memfun(&Menu::name, name)) != end();
> -----------------------^
>
>
> JMarc

Looks like it's a const-thing. The foul hack below allows MenuBackend.C to 
compile.
Angus

class compare_memfun_t {
public:
        compare_memfun_t(R(C::*p)(), A const & a)
                : pmf(p), arg(a) {}
        compare_memfun_t(R(C::*p)() const, A const & a)
                : pmfc(p), arg(a) {}
        bool operator()(C * c) {
                return (c->*pmf)() == arg;
        }
        bool operator()(C & c) {
                return (c.*pmf)() == arg;
        }
        bool operator()(C const * c) const {
                return (c->*pmfc)() == arg;
        }
        bool operator()(C const & c) const {
                return (c.*pmfc)() == arg;
        }
private:
        R(C::*pmf)();
        R(C::*pmfc)() const;
        A const & arg;
};


template <class R, class C, class A>
compare_memfun_t<R, C, A>
compare_memfun(R(C::*p)() const, A const & a)
{
        return compare_memfun_t<R, C, A>(p, a);
}

        
template <class R, class C, class A>
compare_memfun_t<R, C, A>
compare_memfun(R(C::*p)(), A const & a)
{
        return compare_memfun_t<R, C, A>(p, a);
}