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digitalmars.D.learn - Alias function declaration.

reply MaoKo <maoko riseup.net> writes:
Hello. I just want to find what is exactly the difference between:
alias _ = void function(int);
alias void _(int);
Because it's seem that the latter can't be used in the 
declaration of an array (eg: _[] ...).
I think the first is a pointer to function and the second is a 
function type itself but I'm not sure.
Regard.
May 19 2020
parent reply user1234 <user1234 12.de> writes:
On Tuesday, 19 May 2020 at 22:04:49 UTC, MaoKo wrote:

 Hello. I just want to find what is exactly the difference 
 between:
 alias _ = void function(int);
 alias void _(int);
 Because it's seem that the latter can't be used in the 
 declaration of an array (eg: _[] ...).
 I think the first is a pointer to function and the second is a 
 function type itself but I'm not sure.


yes this is correct. To declare a function type using the first 
form is also possible:

     alias TF1 = void(int);
     alias void TF2(int);
     static assert (is(TF1 == TF2));
May 19 2020
parent MaoKo <maoko riseup.net> writes:
On Wednesday, 20 May 2020 at 04:50:42 UTC, user1234 wrote:

 On Tuesday, 19 May 2020 at 22:04:49 UTC, MaoKo wrote:

 Hello. I just want to find what is exactly the difference 
 between:
 alias _ = void function(int);
 alias void _(int);
 Because it's seem that the latter can't be used in the 
 declaration of an array (eg: _[] ...).
 I think the first is a pointer to function and the second is a 
 function type itself but I'm not sure.


 yes this is correct. To declare a function type using the first 
 form is also possible:

     alias TF1 = void(int);
     alias void TF2(int);
     static assert (is(TF1 == TF2));


Ok thanks you :D
May 20 2020