Code coverage in Phobos

[Vladimir Panteleev via Digitalmars-d]

On Monday, 28 March 2016 at 16:10:48 UTC, Basile B. wrote:
> On Monday, 28 March 2016 at 11:29:55 UTC, Vladimir Panteleev 
> wrote:
>> Yep. The difficulties are:
>>
>> 1. Getting data off the autotester. Currently it's nearly 
>> impossible, as is making any changes to it.
>>
>> https://issues.dlang.org/show_bug.cgi?id=14381
>>
>> 2. Collating data from multiple platforms, as there is a lot 
>> of platform-specific code in e.g. std.stdio, std.file, and 
>> most of Druntime.
>
> 3. since the coverage is computed at run-time by the 
> application that runs the tests all the static code (+ CTFE) is 
> considered NOT covered. This gives misleading results.
>
> For example std.traits will probably have a bad coverage while 
> actually it's pretty good.

Not really an issue since DMD only counts the code that goes into 
the binary for coverage. Uncovered lines will have seven zeroes 
before the |, whereas lines with no compiled code will have 
nothing.