On 10/16/10 4:26 CDT, Jonathan M Davis wrote:
On Saturday 16 October 2010 01:40:55 Paulo Pinto wrote:
Hi,
while reading TDPL I start wondering what is the background between
function and delegate.
They seem to provide more or less the same funcionality, except delegate
allows the capture
of the function declaration environment.
Most of the programming languages with support for closures only have one
way of doing it.
Why is D providing two ways of doing it? For me sounds like a feature
similar to register, or
inline for doing what should be the compilers work. Deciding the best
implementation for the
closure.
Thanks,
Paulo
I believe that the two main reasons are
1. function pointers have less overhead.
2. If you want to use function pointers when calling C functions, you need
function pointers rather than delegates.
but there are probably others.
That's about it. The book mentions 2, whereas 1 is implied.
Andrei
