| commit | 4066ea7adc761349e14b669dc15ba4293fb13328 | |
| author | Herbert Valerio Riedel <hvr@gnu.org> | |
| Sun, 6 Aug 2017 11:00:32 +0000 (6 13:00 +0200) | ||
| committer | Herbert Valerio Riedel <hvr@gnu.org> | |
| Wed, 9 Aug 2017 16:38:46 +0000 (9 18:38 +0200) | ||
| tree | 7ec7ce2227a362a1187dbb9420550eaf715ce1aa | treesnapshot (tar.gz zip) |
| parent | a8036999a777505d4a68e499440ab50c1dedb582 | commitdiff |
Refactor 'RelaxDeps' to avoid semantic ambiguity of mempty value
This removes the redundancy between `RelaxDepsNone` and
`RelaxDepsSome []` by removing `RelaxDepsNone`.
This way we avoid the risk of subtle bugs that can occur if the same
semantic value can be expressed in a non-unique way.
A further step to normalise the type would be to turn `[RelaxedDep]`
into `Set RelaxedDep`, but there is no operation that would
significantly benefit from that yet.
This removes the redundancy between `RelaxDepsNone` and
`RelaxDepsSome []` by removing `RelaxDepsNone`.
This way we avoid the risk of subtle bugs that can occur if the same
semantic value can be expressed in a non-unique way.
A further step to normalise the type would be to turn `[RelaxedDep]`
into `Set RelaxedDep`, but there is no operation that would
significantly benefit from that yet.