Mercurial > hg
view README.rst @ 38705:e4b270a32ba8
revset: special case commonancestors(none()) to be empty set
This matches the behavior of ancestor(none()).
From an implementation perspective, ancestor() and commonancestors() are
intersection, and ancestors() is union, so it would make some sense that
commonancestors(none()) returned all revisions. However, ancestor(none())
isn't implemented as such, which breaks ancestor(x) == max(commonancestors(x)).
From a user perspective, ancestors of nothing is nothing whichever type
of operation the ancestor predicate does.
author | Yuya Nishihara <yuya@tcha.org> |
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date | Thu, 12 Jul 2018 23:07:29 +0900 |
parents | 1b59287a1cfa |
children | c5912e35d06d |
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Mercurial ========= Mercurial is a fast, easy to use, distributed revision control tool for software developers. Basic install:: $ make # see install targets $ make install # do a system-wide install $ hg debuginstall # sanity-check setup $ hg # see help Running without installing:: $ make local # build for inplace usage $ ./hg --version # should show the latest version See https://mercurial-scm.org/ for detailed installation instructions, platform-specific notes, and Mercurial user information.