Re: Function with static array as parameter

2017-07-12 Thread Miguel L via Digitalmars-d-learn 

Thanks for your help.

Re: Function with static array as parameter

2017-07-12 Thread Nicholas Wilson via Digitalmars-d-learn 

On Wednesday, 12 July 2017 at 12:20:11 UTC, Miguel L wrote:
What is the best way in D to create a function that receives a 
static array of any length?


Do know that static arrays are passed by value in D, so passing a 
static array of a million elements will copy them...


There are two solutions to this:
1) pass the static array by reference. This will pass a pointer 
to the array and won't copy it although modifying it will modify 
the original. consider passing const ref if the function doesn't 
modify it. Although will still create its of template bloat.
2) pass a slice of the static array. this is essentially the same 
as the above, but you also pass the length of the array as well. 
This means it can accept a slice of a static array of any size 
(or any dynamic array) and since it isn't a template the compiler 
won't make lots of copies for different sized array. This is 
probably he better option.

Re: Function with static array as parameter

2017-07-12 Thread Rene Zwanenburg via Digitalmars-d-learn 

On Wednesday, 12 July 2017 at 12:57:19 UTC, Rene Zwanenburg wrote:

On Wednesday, 12 July 2017 at 12:20:11 UTC, Miguel L wrote:
What is the best way in D to create a function that receives a 
static array of any length?


Templatize the array length:

void foo(size_t length)(int[length] arr)
{

}


That being said, this may lead to template bloat and excessive 
copying. What are you trying to do? Is there a reason you can't 
use a slice?

Re: Function with static array as parameter

2017-07-12 Thread Biotronic via Digitalmars-d-learn 

On Wednesday, 12 July 2017 at 12:20:11 UTC, Miguel L wrote:
What is the best way in D to create a function that receives a 
static array of any length?


You will need to use templates:

void foo(size_t N)(int[N] arr) {
}

--
  Biotronic

Re: Function with static array as parameter

2017-07-12 Thread Rene Zwanenburg via Digitalmars-d-learn 

On Wednesday, 12 July 2017 at 12:20:11 UTC, Miguel L wrote:
What is the best way in D to create a function that receives a 
static array of any length?


Templatize the array length:

void foo(size_t length)(int[length] arr)
{

}

Function with static array as parameter

2017-07-12 Thread Miguel L via Digitalmars-d-learn 
What is the best way in D to create a function that receives a 
static array of any length?