diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/libcore/iter/range.rs | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/src/libcore/iter/range.rs b/src/libcore/iter/range.rs index efda3b263cc..63036f516a0 100644 --- a/src/libcore/iter/range.rs +++ b/src/libcore/iter/range.rs @@ -20,10 +20,14 @@ pub trait Step: Clone + PartialOrd + Sized { /// without overflow. fn steps_between(start: &Self, end: &Self) -> Option<usize>; - /// Replaces this step with `1`, returning itself. + /// Replaces this step with `1`, returning a clone of itself. + /// + /// The output of this method should always be greater than the output of replace_zero. fn replace_one(&mut self) -> Self; - /// Replaces this step with `0`, returning itself. + /// Replaces this step with `0`, returning a clone of itself. + /// + /// The output of this method should always be less than the output of replace_one. fn replace_zero(&mut self) -> Self; /// Adds one to this step, returning the result. |