• Miguel L (15/15) Jul 11 2017 I need to create a non-dynamic array like this
• ketmar (8/23) Jul 11 2017 for simple cases you can use `alloca()`. it is fairly low-level, but doe...
• Dgame (12/27) Jul 11 2017 Another approach would be to use a template function:

Miguel L <mlabayru gmail.com> writes:

I need to create a non-dynamic array like this

void f(int x)
{
int[x] my_array;
...

this does not compile as x value needs to be known at compile 
time. The closest to this I can get is:

void f(int x)
{
int[] my_array;
my_array.length=x;

but I don't really need a dynamic array as length is not going to 
change inside f.

What is the best way to do this?

Thanks in advance

ketmar <ketmar ketmar.no-ip.org> writes:

Miguel L wrote:

 I need to create a non-dynamic array like this

 void f(int x)
 {
 int[x] my_array;
 ...

 this does not compile as x value needs to be known at compile time. The 
 closest to this I can get is:

 void f(int x)
 {
 int[] my_array;
 my_array.length=x;

 but I don't really need a dynamic array as length is not going to change 
 inside f.

 What is the best way to do this?

 Thanks in advance

for simple cases you can use `alloca()`. it is fairly low-level, but does 
it's job.

but if your array is really big, or contains types with dtors, you'd better 
stick with `new` (or setting length). you can also put `scope(exit) delete 
my_array;` after declaration, so array will be destroyed on function exit. 
`delete` is... slightly deprecated ;-) (i.e. not recommented for wide use), 
but works, and will call dtors for you.

Dgame <r.schuett.1987 gmail.com> writes:

On Tuesday, 11 July 2017 at 08:23:02 UTC, Miguel L wrote:
 I need to create a non-dynamic array like this

 void f(int x)
 {
 int[x] my_array;
 ...

 this does not compile as x value needs to be known at compile 
 time. The closest to this I can get is:

 void f(int x)
 {
 int[] my_array;
 my_array.length=x;

 but I don't really need a dynamic array as length is not going 
 to change inside f.

 What is the best way to do this?

 Thanks in advance

Another approach would be to use a template function:

----
void f(int x)()
{
     int[x] array;
}

void main()
{
     f!42;
}
----