[Rpm-maint] [rpm-software-management/rpm] Implement %foreach builtin to iterate over arguments (PR #1828)

[Panu Matilainen]

Hmm. Perhaps the issue is trying to reuse parametric macro calling conventions on something that isn't one at all, and eg %# and %0 have rather different semantics: here %# is total number of arguments of %foreach, but not the "called" iteration body. Should the iteration body be aware of the foreach argument count at all? And while there's an argument to be made about passing the args as %0 and %1, maybe it'd be clearer to use something else so it's not confused with parametric macros. And maybe somewhere in that direction lies an answer to the level as well: if it's not a parametric macro, then it probably shouldn't bump the level either. 




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