Phobos Unittest

[Steven Schveighoffer]

On 9/4/21 7:43 AM, Johan wrote:
> On Saturday, 4 September 2021 at 03:18:01 UTC, Paul Backus wrote:
>> On Saturday, 4 September 2021 at 00:09:37 UTC, H. S. Teoh wrote:
>>> This is related to the bogonity of the current behaviour of 
>>> -unittest, which compiles *all* unittests of *all* imported modules, 
>>> even when you're compiling user code that has no interest in Phobos 
>>> unittests.
>>
>> Well, no; it compiles all unittests of all *compiled* modules, not all 
>> *imported* modules. So it does not actually include Phobos unittests.
>>
>> [...]
>>
>> As Steven Schveighoffer [pointed out][1], Phobos unittests are never 
>> included in user code, regardless of whether `StdUnittest` is used.
> 
> The "never" is false, https://d.godbolt.org/z/c4oeYM7rG
> 
> Unittests inside template code will be added to user code, unless the 
> compiler has determined that the template is already instantiated in 
> Phobos code (the "template culling" that the frontend does, whose 
> behavior is not easily influenced by the programmer).

It's always included (or at least it was when I last looked at it), as 
-unittest implies some form of -allinst. There was some effort to fix 
this, but I can't remember if the outcome was that it was merged or not.

-Steve