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| author | Zac Medico <zmedico@gentoo.org> | 2010-09-02 23:21:06 -0700 |
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| committer | Zac Medico <zmedico@gentoo.org> | 2010-09-02 23:21:06 -0700 |
| commit | 1f920fdc717beb939e4e225173c17a1aa7bc63be (patch) | |
| tree | aafa2e7f6c10039417d2ba1ecbf5b48e5acffad4 /doc | |
| parent | c40dca02f5c8e10405f1b6e30c53e3ca7b77782a (diff) | |
| download | portage-1f920fdc717beb939e4e225173c17a1aa7bc63be.tar.gz portage-1f920fdc717beb939e4e225173c17a1aa7bc63be.tar.bz2 portage-1f920fdc717beb939e4e225173c17a1aa7bc63be.zip | |
Add a "Delayed Evaluation of Disjunctive Dependency Choices" section
to depenency resolution documentation.
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/dependency_resolution/decision_making.docbook | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/doc/dependency_resolution/decision_making.docbook b/doc/dependency_resolution/decision_making.docbook index ffb1a4ab2..d64ff83f6 100644 --- a/doc/dependency_resolution/decision_making.docbook +++ b/doc/dependency_resolution/decision_making.docbook @@ -9,6 +9,19 @@ represents one possible alternative combination of dependency atoms capable of satisfying the dependency expression. </para> + <sect2 id='dependency-resolution-decision-making-dependency-expression-evaluation-delayed-disjunction'> + <title>Delayed Evaluation of Disjunctive Dependency Choices</title> + <para> + Disjunctive dependencies, of which virtuals are a special case, + can be satsified by multiple choices of dependency atoms. These + choices are delayed until as late as possible in the dependency + calculation, after packages have been selected to satisfy + as many non-disjunctive dependencies as possible. As a consequence + of this delayed evaluation, there is maximal information available + which makes it possible to optimize choices such that the total + number of packages required to satisfy all dependencies is minimized. + </para> + </sect2> </sect1> <sect1 id='dependency-resolution-decision-making-look-ahead'> <title>Look-Ahead</title> |