I'm trying to accept delegates or functions in a templated method.
My first try using "isDelegate!dg || isFunctionPointer!dg" did
not work because isDelegate fails, although I'm not sure I
understand exactly why:
void main()
{
int x;
static assert(isDelegate!(() { x = 4; }));
// Error: static assert ... is false
}
If I changed that example to use isSomeFunction it works
correctly. But when I tried to use isSomeFunction in the proper
context it fails to compile:
class A
{
void foo(alias dg)()
if(isSomeFunction!dg)
{
}
}
void main()
{
int x;
A a = new A;
a.foo!((int param) { x = 4;});
// error: cannot use local '__lambda1' as parameter to
non-global
template foo(alias dg)() if
(isSomeFunction!(dg))
}
Can anyone help me understand this?
