Forcing inline functions (again) - groan

Stefan Koch uplink.coder at
Wed Jul 15 14:14:06 UTC 2020

On Wednesday, 15 July 2020 at 13:38:34 UTC, Cecil Ward wrote:
> I recently noticed
>     pragma(inline, true)
> which looks extremely useful. A couple of questions :
> 1. Is this cross-compiler compatible?
> 2. Can I declare a function in one module and have it _inlined_ 
> in another module at the call site?
> I’m looking to write functions that expand to approx one or 
> even zero machine instructions and having the overhead of a 
> function call would be disastrous; in some cases would make it 
> pointless having the function due to the slowdown.

pragma inline will work for dmd.
and it used to fail if it couldn't inline.
Now it just generates a warning.
So with -w it will still fail.

Afaik other compilers cannot warn if the in-lining fails but I 
might be wrong.
And ldc/gdc should be able to inline most code which makes sense 
to inline.

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