On 6/19/2022 11:55 AM, Paul Backus wrote:
On Sunday, 19 June 2022 at 15:34:48 UTC, Ruby The Roobster wrote:
On 6/19/2022 11:19 AM, Paul Backus wrote:
On Sunday, 19 June 2022 at 14:51:26 UTC, Ruby The Roobster wrote:
Is it possible to make a module constructor run at compile-time? If
so, how?
No, it's not.
What are you trying to accomplish that lead you to ask this question?
There is probably a different way to do it without involving module
constructors.
What I was trying to accomplish was to change a compile time array
whenever a certain module was included. The value of the array needs
to be known at compile time.
You can do this with a `static if` check:
static if (__traits(compiles, { import mymodule; }))
{
// mymodule is included
enum compileTimeArray = ...;
}
Curious - how exactly does this determine if the module is included? I
thought __traits(compiles, ...) only checks if an expression is
SEMANTICALLY correct.
