Add is_empty function to ExactSizeIterator
#34357
Conversation
All other types implementing a `len` functions have `is_empty` already.
|
r? @brson (rust_highfive has picked a reviewer for you, use r? to override) |
| @@ -519,6 +519,31 @@ pub trait ExactSizeIterator: Iterator { | |||
| assert_eq!(upper, Some(lower)); | |||
| lower | |||
| } | |||
|
|
|||
| /// | |||
There was a problem hiding this comment.
rustdoc might not like this leading empty doc comment line :)
alexcrichton
added
T-libs-api
|
For adding a method to many iterators we'll likely want to run this through crater to ensure that there's no unexpected fallout if we also decide to merge. |
|
Didn't we see a very similar PR to this one recently (adding is_empty to ... something) and decline to add it? I don't see it by searching old pulls. |
|
Maybe you mean #31877? |
|
Either that or perhaps |
|
The libs team discussed this during triage yesterday and the conclusion was that this is ok to merge pending a crater run |
|
Travis failure looks legit. |
|
Starting a crater run. |
|
@brson May I push a fix for the test failure or does that interfere with the crater run? |
|
@tbu- You can go ahead and push it now. There's a small window where it would have interfered. |
|
https://gist.github.com/anonymous/caaed4862686e93319d5758b73211b54 all false positives. |
tbu-
force-pushed
the
pr_exact_size_is_empty
branch
2 times, most recently
from
7dfe1a6
to
9e2c72f
Compare
tbu-
force-pushed
the
pr_exact_size_is_empty
branch
from
9e2c72f
to
7b2a03f
Compare
|
@bors r+ |
|
📌 Commit 7b2a03f has been approved by |
Add `is_empty` function to `ExactSizeIterator` All other types implementing a `len` functions have `is_empty` already.
All other types implementing a
lenfunctions haveis_emptyalready.