On 9/15/18 8:36 PM, Nicholas Wilson wrote:
Without it, I get a (possibly quite a lot of) deprecation warnings and I
have to insert a cast to the corresponding type, e.g.
f(cast(int)E.a)/g(cast(long)(a - b)), to verify the behaviour under the
new system and silence the deprecation warning (absolutely necessary if
using `-de`). Then I have to delete them after stage 2, but what if I
want to support older compilers? Well then I have to wait until they are
sufficiently old enough.
As precedent, we do have -transition=intpromote, which disables the
requirement for casting smaller integers to int first.
So the way I would expect someone to migrate their project:
1. Examine all deprecations, looking for ones where I actually *WANT*
the bool version to be called. Insert cast there.
2. Enable the -transition=nobooldemote or whatever we call it.
3. Once the deprecation period is over, remove the -transition switch.
If I wanted a version to be compilable with older versions of dmd, then
I would have to cast.
Hm... another option is to have a switch identify "useless" casts once
the deprecation period is over. Or add it into dfix.
-Steve
