• Marc (7/15) Dec 22 2017 I'd like to do something like this (imaginary code):
• =?UTF-8?Q?Ali_=c3=87ehreli?= (12/19) Dec 22 2017 That can't work because there is no S object to call doSomething on. One...
• Mengu (3/18) Dec 22 2017 it is also possible with getMember trait but why don't you just

Marc <jckj33 gmail.com> writes:

How can I create a alias to a struct method?

 struct S {
  string doSomething(int n) { return ""; }
 }

I'd like to do something like this (imaginary code):

alias doSomething = S.doSomething;

then call it by doSomething(3)

I got the following error from this code:

 Error: need 'this' for 'gen' of type 'string(int n)'

So I tried create a instance:

 alias doSomething = S().doSomething;

Changes the error to:

 app.d(96): Error: function declaration without return type. 
 (Note that > constructors are always named this)
 app.d(96): Error: semicolon expected to close alias declaration

=?UTF-8?Q?Ali_=c3=87ehreli?= <acehreli yahoo.com> writes:

On 12/22/2017 09:53 AM, Marc wrote:
 How can I create a alias to a struct method?

 struct S {
  string doSomething(int n) { return ""; }
 }

 I'd like to do something like this (imaginary code):

 alias doSomething = S.doSomething;

 then call it by doSomething(3)

That can't work because there is no S object to call doSomething on. One 
way is to use a delegate:

struct S {
     string doSomething(int n) { return ""; }
}

void main() {
     S s;
     auto d = (int n) { s.doSomething(n); };
     d(3);
}

Ali

Mengu <mengukagan gmail.com> writes:

On Friday, 22 December 2017 at 17:53:34 UTC, Marc wrote:
 How can I create a alias to a struct method?

 struct S {
  string doSomething(int n) { return ""; }
 }

 I'd like to do something like this (imaginary code):

 alias doSomething = S.doSomething;

 then call it by doSomething(3)

 I got the following error from this code:

 Error: need 'this' for 'gen' of type 'string(int n)'

 So I tried create a instance:

 alias doSomething = S().doSomething;

 Changes the error to:

 app.d(96): Error: function declaration without return type. 
 (Note that > constructors are always named this)
 app.d(96): Error: semicolon expected to close alias declaration


it is also possible with getMember trait but why don't you just 
mark that method as static?