Re: std::vector initialization
On Mar 4, 8:37 pm, Jeff Schwab <j...@schwabcenter.com> wrote:
buch...@gmail.com wrote:
Thx Jeff for elegant STL solution, but is there an advantage
of using function objects you propose over a standard
function definition in this particular case?
Yes. By baking the actual function into a static type, you
get to work with it at compile-time. If you were just to pass
down a raw function (qsort-style), it would decay to a
function-pointer. In this example, all calls by the algorithm
implementation (for_each) to the function would have to be
made through the function-pointer, and performance could
suffer.
But he's not passing it around; he's just calling it. In which
case, making it an object is just excess verbiage.
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