rustc: implement a #[no_implicit_prelude] attribute.
#7844
Closed
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
… semantics. Also added unit tests of range code to test refactoring. The num-range-rev.rs test will need to be updated when the range_rev semantics change.
… only, not type signatures)
…fclosedness-issue5270-2ndpr, r=cmr Changes int/uint range_rev to iterate over range `(hi,lo]` instead of `[hi,lo)`. Fix rust-lang#5270. Also: * Adds unit tests for int/uint range functions * Updates the uses of `range_rev` to account for the new semantics. (Note that pretty much all of the updates there were strict improvements to the code in question; yay!) * Exposes new function, `range_step_inclusive`, which does the range `[hi,lo]`, (at least when `hi-lo` is a multiple of the `step` parameter). * Special-cases when `|step| == 1` removing unnecessary bounds-check. (I did not check whether LLVM was already performing this optimization; I figure it would be a net win to not leave that analysis to the compiler. If reviewer objects, I can easily remove that from the refactored code.) (This pull request is a rebased version of PR rust-lang#7524, which went stale due to recent unrelated changes to num libraries.)
Allowing them in type signatures is a significant amount of extra work, unfortunately. This also doesn't apply to static values, which takes a different code path.
It disables the insertion of `use std::prelude::*;` into the top of all the modules below the item on which it is placed (including that item itself).
|
We also really need a spot to document things like this... That along with asserting that some attributes are crate-level instead of somewhere else would be nice (not in the scope of this PR though). |
56 tasks
|
Nice! I found the fact that the prelude effectively pollutes the global namespace always a bit worrying, but with this you have a way out in those situations. |
bors
added a commit
that referenced
this pull request
Jul 17, 2013
It disables the insertion of `use std::prelude::*;` into the top of all the modules below the item on which it is placed (including that item itself). (Similar to GHC's `-XNoImplicitPrelude`.)
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
It disables the insertion of
use std::prelude::*;into the top ofall the modules below the item on which it is placed (including that
item itself).
(Similar to GHC's
-XNoImplicitPrelude.)