[Macros] Allow macro parameters to have default arguments. #64631
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SE-0382 allows macro parameters to have default arguments. Enable these default arguments, with the normal type checking rules. One significant quirk to this implementation is that the actual default argument values don't make it to the macro implementation. This is a previously-unconsidered design problem we'll need to address. Tracked by rdar://104043987.
DougGregor
requested review from
hborla,
slavapestov,
xedin,
ahoppen,
bnbarham,
CodaFi and
rintaro
as code owners
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SE-0382 allows macro parameters to have default arguments. Enable these default arguments, with the normal type checking rules. One significant quirk to this implementation is that the actual default argument values don't make it to the macro implementation. This is a previously-unconsidered design problem we'll need to address.
Tracked by rdar://104043987.