Markus Armbruster <arm...@redhat.com> writes: > Local variables shadowing other local variables or parameters make the > code needlessly hard to understand. Bugs love to hide in such code. > Evidence: PATCH 1. > > Enabling -Wshadow would prevent bugs like this one. But we'd have to > clean up all the offenders first. We got a lot of them. > > Enabling -Wshadow=local should be less work for almost as much gain. > I took a stab at it. There's a small, exciting part, and a large, > boring part. > > The exciting part is dark preprocessor sorcery to let us nest macro > calls without shadowing: PATCH 7.
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