Cumulative code coverage?

[Petar]

On Wednesday, 21 March 2018 at 19:44:19 UTC, H. S. Teoh wrote:
> On Wed, Mar 21, 2018 at 12:35:08PM -0700, H. S. Teoh via 
> Digitalmars-d wrote: [...]
>> Cool, passing --DRT-covopt="merge:1" did the trick.
> [...]
>
> Speaking of which, are the --DRT-* options documented 
> anywhere?? I don't even know where to begin to look, besides in 
> the druntime code itself.
>
>
> T

I think you're looking for: "Controlling the Coverage Analyser" 
under https://dlang.org/articles/code_coverage.html.