How can I store delegates in array?
H. S. Teoh
hsteoh at quickfur.ath.cx
Fri Nov 30 08:06:11 PST 2012
On Fri, Nov 30, 2012 at 04:57:44PM +0100, Chopin wrote:
> I tried the following:
>
> import std.stdio;
> import std.regex;
>
> bool lol(string name, string val)
> {
> if (name == "lal")
> if (val[0..3] == "2124")
> return true;
> return false;
> }
>
> bool lal(string name, string val) { return false; }
> alias bool delegate(string, string) DgType;
> void main()
> {
> struct Filter
> {
>
> private DgType[] delFuncs; // array with functions :D
>
>
> public void add(DgType filter_func) {
> delFuncs ~= filter_func;
> }
> }
>
> auto x = Filter();
> x.add(&lol);
> x.add(&lal);
>
> writeln(x);
> }
>
> Didn't work... just a bunch of errors...
>
> t.d(28): Error: function t.main.Filter.add (bool delegate(string,
> string) filter_func) is not callable using argument types (bool
> function(string name, string v
> al))
[...]
Ah, I see the problem. What you want are *function pointers*, not
delegates. So do this instead:
alias bool function(string,string) FuncType;
struct Filter
{
private FuncType[] delFuncs;
...
}
T
--
Prosperity breeds contempt, and poverty breeds consent. -- Suck.com
More information about the Digitalmars-d-learn
mailing list