Re: Allocating a slice object

[Maxim Fomin]

On Thursday, 4 July 2013 at 12:02:16 UTC, monarch_dodra wrote:
This is a pretty stupid question, but how would you allocate an 
"int[]" on the heap? I'm not talking about the array, but the 
actual slice object. EG:

int[]* pSlice = new int[];
//Error: new can only create structs,
//dynamic arrays or class objects, not int[]'s

Is there a simple "idiomatic" way?

I'm currently doing it by allocating a struct that wraps one:

struct S{int[] a;}
int[]* pSlice1 = cast(int[]*) new S;
int[]* pSlice2 = &(new S).a;

Note: This is also a neat way to allocate a static array on the 
heap.

Yes. This is a good example of how D type system and memory 
allocation type are different, despite many move type system 
terms into memory category.

Anybody have some better way?

Another way:

import std.stdio;

void main()
{
        int[] arr;
        auto x = { return arr; } ;
        writeln(&arr);
}