17 Nov
2012
17 Nov
'12
9:24 p.m.
On 16/11/12 16:00, Maxim Yanchenko wrote:
Olaf van der Spek <ml <at> vdspek.org> writes:
On Fri, Nov 16, 2012 at 3:25 PM, Mathias Gaunard <mathias.gaunard <at> ens-lyon.org> wrote:
void f(std::string const&); f("Olaf");
Are compilers/optimizers not smart enough to construct the temporary object at compile time?
I'm afraid they are not smart enough to eliminate an unneeded temporary when it's something sophisticated like std::string...
Doing that kind of transformation, assuming memory requirements were relaxed to actually allow them, would require full-blown static analysis on all of f's body. So no, you can't expect any compiler to do it.