Re: [Dlang] Delegate Syntax Question
On Sunday, 10 January 2016 at 14:32:02 UTC, Jack wrote:
Hello. So I was trying to pass a delegate as an argument in a
function and was wondering if I'm writing the correct code for
it.
You see my code is :
//
class Foo()
{
void bar()
{
writeln("Hello World");
}
}
class Bar()
{
void delegate() action;
void setAction(void delegate() dele)
{
action = dele;
}
}
void main()
{
Foo foo = new Foo();
Bar bar = new Bar();
bar.setAction(&foo.bar);
bar.action();
}
/
Is this correct? Because I've been having trouble calling the
delegate when passing the method and I read many documentation
concerning function and delegates. I'm just confused.
(Disclaimer: My code's pattern is the same as above but it's
not really my exact code)
Replying to my self because I don't know how I can reply to two
posts at once.
Thank you for helping. I've had a problem on handling delegates
in my code so I was not sure if it was working. I'll post here if
I can't find the solution.
Re: [Dlang] Delegate Syntax Question
On Sunday, 10 January 2016 at 14:32:02 UTC, Jack wrote:
...
Just to make your code a little more clear, try using aliases
when defining delegate parameters. Like this:
alias Action = void delegate();
Then in your code you use the alias, like this:
class Bar()
{
private Action _action;
void setAction(Action d)
{
this._action = d;
}
}
IMHO it makes everything more readable and you only have one
definition of the delegate signature.
Re: [Dlang] Delegate Syntax Question
On 10.01.2016 15:32, Jack wrote:
//
class Foo()
Those parentheses make this a (zero parameter) class template. I suppose
you just want a plain class. Drop them then.
{
void bar()
{
writeln("Hello World");
}
}
class Bar()
ditto
{
void delegate() action;
void setAction(void delegate() dele)
{
action = dele;
}
}
void main()
{
Foo foo = new Foo();
Bar bar = new Bar();
bar.setAction(&foo.bar);
bar.action();
}
/
Is this correct? Because I've been having trouble calling the delegate
when passing the method and I read many documentation concerning
function and delegates. I'm just confused. (Disclaimer: My code's
pattern is the same as above but it's not really my exact code)
Aside from the mentioned parentheses (and a missing import),
everything's correct.
[Dlang] Delegate Syntax Question
Hello. So I was trying to pass a delegate as an argument in a
function and was wondering if I'm writing the correct code for it.
You see my code is :
//
class Foo()
{
void bar()
{
writeln("Hello World");
}
}
class Bar()
{
void delegate() action;
void setAction(void delegate() dele)
{
action = dele;
}
}
void main()
{
Foo foo = new Foo();
Bar bar = new Bar();
bar.setAction(&foo.bar);
bar.action();
}
/
Is this correct? Because I've been having trouble calling the
delegate when passing the method and I read many documentation
concerning function and delegates. I'm just confused.
(Disclaimer: My code's pattern is the same as above but it's not
really my exact code)
