Confusion over delegates seems to be a somewhat common topic,
judging from
http://forum.dlang.org/thread/jbkahhlvevgectisd...@forum.dlang.org
and
http://stackoverflow.com/questions/6431884/function-and-delegate-literals-in-d.
I'm also somewhat confused by functions vs. function literals and
how to pass them around.
In my case I'm trying to figure out the best way to pass
functions to other fundtions. So I wrote the following toy code
to see what the compiler would do. I'm trying to understand why
the compiler emitted errors on the code below (shown w/
comments). Any insight/suggestions on better ways to pass
functions around would also be appreciated.
import std.datetime;
import std.stdio;
void f(int delegate(int) h){
writefln("h(0)=%d", h(0));
}
void g(int function (int) h){
writefln("h(0)=%d", h(0));
}
void main(){
int foo(int a){ return a+6;}
auto bah = function int(int b){ return b+7;};
f(foo); //error
f(&foo);
f(bah); //error
f(&bah); // error
g(foo); //error
g(&foo); //error
g(bah);
g(&bah); //error
}
