My guess is that I have to build phobos with:

$make -f posix.mak BUILD=debug

but then what do I do next? I'm using Linux and I built dmd+phobos manually by following this guide: https://wiki.dlang.org/Building_under_Posix

On Friday, 2 November 2018 at 14:10:35 UTC, Richard Palme wrote:
> My guess is that I have to build phobos with:
>
> $make -f posix.mak BUILD=debug
>
> but then what do I do next? I'm using Linux and I built dmd+phobos manually by following this guide: https://wiki.dlang.org/Building_under_Posix

Which phobos functions are used in dmd?
there _should_ be none!

On Friday, 2 November 2018 at 16:41:32 UTC, Stefan Koch wrote:
> Which phobos functions are used in dmd?
> there _should_ be none!

I think I didn't phrase the title correctly:

I'm using dmd as compiler and want to activate the contracts of phobos functions. For example there's a phobos function std.bitmanip.opIndex implemented like this:

bool opIndex(size_t i) const @nogc pure nothrow
    in {
        assert(i < _len);
    }
    do {
        return cast(bool) bt(_ptr, i);
    }

and when I call this function from my code I want the pre contract to be checked (assert(i < _len)

Just compile the needed module directly:
dmd myapp.d src/std/bitmanip.d