C++: Add a type-based SemReason.
#13880
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+185
−51
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This is the preparatory work that we need before we can merge #13783. This PR adds the ability to specify a "SemTypeReason" in range analysis, which will then propagate all the way up to the call to
semBounded. Users of range analysis can then decide for themselves whether they're interested in type-based bounds by checking whether theSemReasonis aTypeReason.This PR shouldn't have any affect on any existing queries since nothing in range analysis currently produce a
SemTypeReason. This will be done by #13783.