On 24/04/2011 15:40, d coder wrote:
Greetings
I am facing problem passing a shared class method as an argument to a
function. Look at the following minimized code snippet.
class Foo {
shared // compiles when commented out
void bar() {}
}
void frop(void delegate() dg) {
}
void main() {
shared Foo foo = new shared(Foo);
frop(&foo.bar);
}
I get the following errors (using dmd 2.052)
dg.d(11): Error: function dg.frop (void delegate() dg) is not callable
using argument types (void delegate() shared)
dg.d(11): Error: cannot implicitly convert expression (&foo.bar) of type
void delegate() shared to void delegate()
Please suggest a valid signature for the function frop, so that it can
take shared delegates.
Regards
- Puneet
I've copy and pasted my reply to Benjamin below, you should be able to
adapt it to your needs:
The only way I've found to do this that works is using an alias - this
is probably worth a bug report if there isn't one already.
----
class A
{
// Note that you get forward reference errors if you opt to
// infer the return type here. That's also a bug.
void method(const const(char[]) str) shared
{
}
}
alias typeof(&A.method) shdg;
void foo(shdg foo)
{
}
void main()
{
foo(&A.method);
}
----
--
Robert
http://octarineparrot.com/
