librustc: Forbid external crates, imports, and/or items from being #16482
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bors
added a commit
that referenced
this pull request
Aug 17, 2014
declared with the same name in the same scope.
This breaks several common patterns. First are unused imports:
use foo::bar;
use baz::bar;
Change this code to the following:
use baz::bar;
Second, this patch breaks globs that import names that are shadowed by
subsequent imports. For example:
use foo::*; // including `bar`
use baz::bar;
Change this code to remove the glob:
use foo::{boo, quux};
use baz::bar;
Or qualify all uses of `bar`:
use foo::{boo, quux};
use baz;
... baz::bar ...
Finally, this patch breaks code that, at top level, explicitly imports
`std` and doesn't disable the prelude.
extern crate std;
Because the prelude imports `std` implicitly, there is no need to
explicitly import it; just remove such directives.
The old behavior can be opted into via the `import_shadowing` feature
gate. Use of this feature gate is discouraged.
This implements RFC #116.
Closes #16464.
[breaking-change]
r? @brson
declared with the same name in the same scope.
This breaks several common patterns. First are unused imports:
use foo::bar;
use baz::bar;
Change this code to the following:
use baz::bar;
Second, this patch breaks globs that import names that are shadowed by
subsequent imports. For example:
use foo::*; // including `bar`
use baz::bar;
Change this code to remove the glob:
use foo::{boo, quux};
use baz::bar;
Or qualify all uses of `bar`:
use foo::{boo, quux};
use baz;
... baz::bar ...
Finally, this patch breaks code that, at top level, explicitly imports
`std` and doesn't disable the prelude.
extern crate std;
Because the prelude imports `std` implicitly, there is no need to
explicitly import it; just remove such directives.
The old behavior can be opted into via the `import_shadowing` feature
gate. Use of this feature gate is discouraged.
This implements RFC rust-lang#116.
Closes rust-lang#16464.
[breaking-change]
bors
added a commit
that referenced
this pull request
Aug 17, 2014
declared with the same name in the same scope.
This breaks several common patterns. First are unused imports:
use foo::bar;
use baz::bar;
Change this code to the following:
use baz::bar;
Second, this patch breaks globs that import names that are shadowed by
subsequent imports. For example:
use foo::*; // including `bar`
use baz::bar;
Change this code to remove the glob:
use foo::{boo, quux};
use baz::bar;
Or qualify all uses of `bar`:
use foo::{boo, quux};
use baz;
... baz::bar ...
Finally, this patch breaks code that, at top level, explicitly imports
`std` and doesn't disable the prelude.
extern crate std;
Because the prelude imports `std` implicitly, there is no need to
explicitly import it; just remove such directives.
The old behavior can be opted into via the `import_shadowing` feature
gate. Use of this feature gate is discouraged.
This implements RFC #116.
Closes #16464.
[breaking-change]
r? @brson
matthiaskrgr
pushed a commit
to matthiaskrgr/rust
that referenced
this pull request
Feb 11, 2024
Swap Subtree::token_trees from Vec to boxed slice Performs one of the optimizations suggested in rust-lang#16325, but a little bit more. Boxed slices guarantee `shrink_to_fit` aswell as saving a pointer width as no capacity has to be stored. Most of the diff is: - Changing `vec![]` to `Box::new([])` - Changing initialize -> fill into fill -> into_boxed_slice - Working around the lack of an owned iterator or automatic iteration over a `Box<[T]>` I would like to use my own crate, [small-fixed-array](https://lib.rs/small-fixed-array), although I understand if it isn't mature enough for this. If I'm given the go ahead, I can rework this PR to use it instead.
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declared with the same name in the same scope.
This breaks several common patterns. First are unused imports:
Change this code to the following:
Second, this patch breaks globs that import names that are shadowed by
subsequent imports. For example:
Change this code to remove the glob:
Or qualify all uses of
bar:Finally, this patch breaks code that, at top level, explicitly imports
stdand doesn't disable the prelude.Because the prelude imports
stdimplicitly, there is no need toexplicitly import it; just remove such directives.
The old behavior can be opted into via the
import_shadowingfeaturegate. Use of this feature gate is discouraged.
This implements RFC #116.
Closes #16464.
[breaking-change]
r? @brson