The output of next code is the same to extent that we feel that there's no difference between "only" and "[]", so what "only" added here?:

'''D
[1,2,3].writeln;
only(1,2,3).writeln;
'''

output:

[1, 2, 3]
[1, 2, 3]

On Monday, 8 August 2022 at 11:35:48 UTC, pascal111 wrote:
> The output of next code is the same to extent that we feel that there's no difference between "only" and "[]", so what "only" added here?:
>
> '''D
> [1,2,3].writeln;
> only(1,2,3).writeln;
> '''
>
> output:
>
> [1, 2, 3]
> [1, 2, 3]


`only(1,2,3)` doesn't use GC. `[1,2,3]` allocate GC array.