Where can find fix length array memory layout document

[Dennis]

On Tuesday, 18 June 2019 at 12:26:14 UTC, lili wrote:
> Hi guys:
>    Is the Dlang fix-length array alloc on stack?  when a test
>     writeln([1]).sizeof //16
>     writeln([2]).sizeof //16
>     Why, What is the fix-length array memory layout.

I'm assuming you mean writeln([1].sizeof).
An array literal is a slice of a dynamic array (which is length + 
pointer, so 2*size_t size).
A fixed size array has to be declared as a local / member 
variable, and then the content is on the stack:

```
int[10] a;
writeln(a.sizeof); // 40
writeln(a[].sizeof); // 16 on 64-bit or 8 on 32-bit
```

To get a static array literal, you can use the library function 
staticArray:
```
import std.array;
writeln([1, 2, 3].staticArray.sizeof); // 12
```