mikros/rust
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Specify criterion for PartialOrd

Browse Source
This commit is contained in:
Czipperz 2018-12-29 19:14:06 -05:00
parent cf3959c5b0
commit 445dadca33
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
src/libcore/cmp.rs
View File

@ -474,8 +474,9 @@ impl<T: Ord> Ord for Reverse<T> {
///
/// Implementations of `PartialEq`, `PartialOrd`, and `Ord` *must*
/// agree with each other. That is, `a.cmp(b) == Ordering::Equal` if
/// and only if `a == b`. It's easy to accidentally make them disagree
/// by deriving some of the traits and manually implementing others.
/// and only if `a == b` and `Some(a.cmp(b)) == a.partial_cmp(b)` for
/// all `a` and `b`. It's easy to accidentally make them disagree by
/// deriving some of the traits and manually implementing others.
///
/// Here's an example where you want to sort people by height only, disregarding `id`
/// and `name`: