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4782 Commits

Author SHA1 Message Date
David Wood
7dee5f824d hir: introduce lang items for AST lowering 
This commit adds new lang items which will be used in AST lowering once
`QPath::LangItem` is introduced.

Co-authored-by: Matthew Jasper <mjjasper1@gmail.com>
Signed-off-by: David Wood <david@davidtw.co>
 2020-08-16 15:42:23 +01:00
bors
243c725c24 Auto merge of #75561 - kornelski:stringcol, r=Dylan-DPC 
Doc: String isn't a collection

On forums one user was confused by this text, interpreting it as saying that `String` is a `Vec<char>` literally, rather than figuratively for the purpose of collect. I've reworded that paragraph.
 2020-08-16 06:26:38 +00:00
bors
9d38dc22e5 Auto merge of #75553 - denisvasilik:intra-doc-links-convert, r=jyn514 
Move to intra-doc links for /library/core/src/char/convert.rs

Helps with #75080.

@rustbot modify labels: T-doc, A-intra-doc-links, T-rustdoc
 2020-08-16 04:31:05 +00:00
bors
86bccb684d Auto merge of #75541 - camelid:intra-doc-links-for-core-option, r=jyn514 
Switch to intra-doc links in `core::option`

Part of #75080.

I didn't change some of the links since they link into `std` and you can't link from `core` to `std` (#74481).

Also, at least one other link can't be switched to an intra-doc link because it's not supported yet (#74489).
 2020-08-16 02:39:21 +00:00
Denis Vasilik
14b50ede7d Link to primitive instead of module 2020-08-15 19:27:34 +02:00
Kornel Lesiński
d5cb5eb08b Doc: String isn't a collection 2020-08-15 17:55:10 +01:00
Camelid
8227b3b0b2 Remove unnecessary intra-doc link 
Co-authored-by: Joshua Nelson <joshua@yottadb.com>
 2020-08-15 09:52:35 -07:00
Camelid
b02c4049cb Fix link 
Intra-doc links don't work yet in this case: #74489
 2020-08-15 09:31:14 -07:00
Denis Vasilik
ebcb99ef8f Use intra-doc links 2020-08-15 01:12:47 +02:00
Camelid
b1c05c5c2b Switch to intra-doc links in core::option 2020-08-14 16:11:43 -07:00
Tyler Mandry
ad8c5e1480 Rollup merge of #75214 - chansuke:fix-intra-doc-links, r=jyn514 
Use intra-doc links in `mem::manually_drop` & `mem::maybe_uninit`

This is partial fixes for https://github.com/rust-lang/rust/issues/75080.
 2020-08-14 14:46:47 -07:00
Denis Vasilik
75c1e2dfbb Use intra-doc links 2020-08-14 20:50:38 +02:00
chansuke
61866bc60c Use intra-doc links in mem::manually_drop & mem::maybe_uninit 2020-08-15 02:33:39 +09:00
bors
55b9adfafa Auto merge of #75157 - rodrimati1992:patch-1, r=oli-obk 
Constified str::from_utf8_unchecked

This would be useful for const code to use an array to construct a string using guaranteed utf8 inputs, and then create a `&str` from it.
 2020-08-14 14:08:05 +00:00
Jack Champagne
9b0f3d1266 Fix documentation error 2020-08-13 16:58:50 -04:00
rodrimati1992
18377082f1 Fixed transmute argument 2020-08-13 16:08:22 -03:00
rodrimati1992
1767c8bdf0 Replaced union with transmute 2020-08-13 15:56:23 -03:00
Ralf Jung
7aac3e0400 pin docs: add some forward references 2020-08-13 14:41:04 +02:00
kadmin
af32db21c8 Add drop check test & MaybeUninit::first_ptr_mut 
Also in drop check test add hacky workaround for platforms that don't support
panic=unwind
 2020-08-13 03:51:08 +00:00
kadmin
412417d807 Rm hiding feature gate & add 1 more example 
Update order docs for `map`
 2020-08-13 03:51:05 +00:00
kadmin
54b821ebc0 Add tracking issue #75243 
Add note & example about iter order

Add doc changes

Update doc comments
 2020-08-13 03:51:01 +00:00
kadmin
56a651ca15 Add recommend changes to array 
Switch from indexing to zip, and also use `write` on `MaybeUninit`.

Add array_map feature to core/src/lib

Attempt to fix issue of no such feature

Update w/ pickfire's review

This changes a couple of names around, adds another small test of variable size,
and hides the rustdoc #![feature(..)].

Fmt doctest

Add suggestions from lcnr
 2020-08-13 03:50:59 +00:00
kadmin
f6411e4c66 Add Array Impl Lang Item in various places 
Add basic test

And also run fmt which is where the other changes are from

Fix mut issues

These only appear when running tests, so resolved by adding mut

Swap order of forget

Add pub and rm guard impl

Add explicit type to guard

Add safety note

Change guard type from T to S

It should never have been T, as it guards over [MaybeUninit<S>; N]
Also add feature to test
 2020-08-13 03:50:57 +00:00
kadmin
d8718183b2 Create lang item array and add map fn 
This creates the language item for arrays, and adds the map fn which is like map in options or
iterators. It currently allocates an extra array, unfortunately.

Added fixme for transmuting

Fix typo

Add drop guard
 2020-08-13 03:50:54 +00:00
CDirkx
6b0d44e92a Make some Ordering methods const 
Constify the following methods of `core::cmp::Ordering`:
 - `reverse`
 - `then`

Possible because of #49146 (Allow `if` and `match` in constants).
 2020-08-12 22:10:32 +02:00
Lukas Kalbertodt
db99f98c3e Put panic code path from copy_from_slice into cold function 
The previous `assert_eq` generated quite some code, which is especially
problematic when this call is inlined. This commit also slightly
improves the panic message from:

  assertion failed: `(left == right)`
    left: `3`,
   right: `2`: destination and source slices have different lengths

...to:

  source slice length (2) does not match destination slice length (3)
 2020-08-12 21:12:21 +02:00
Laurence Tratt
55802e3bf3 Add Rust function pointers. 
Co-authored-by: Ralf Jung <post@ralfj.de>
 2020-08-12 15:38:18 +00:00
Laurence Tratt
8cb8955d57 Change notation. 
Co-authored-by: Ralf Jung <post@ralfj.de>
 2020-08-12 15:19:46 +00:00
Laurence Tratt
f3d7196cae Be clearer about Some/None transmute. 2020-08-12 15:53:58 +01:00
Laurence Tratt
83f47aa11b Be clear about the reverse transmute guarantees. 2020-08-12 15:47:37 +01:00
Laurence Tratt
f5118a525f Clarify and add guarantee about transmute. 2020-08-12 15:36:55 +01:00
bors
ded20c98be Auto merge of #75066 - poliorcetics:document-unsafety-in-core-slice, r=LukasKalbertodt 
Document unsafety in library/core/src/slice/mod.rs

Restart where #73555 left off, helping with #66219.
 2020-08-12 14:18:15 +00:00
Laurence Tratt
73ada2d404 Explicitly document the size guarantees that Option makes. 
Triggered by a discussion on wg-unsafe-code-guidelines about which layouts of
`Option<T>` one can guarantee are optimised to a single pointer.
 2020-08-12 15:07:38 +01:00
Denis Vasilik
4c5896fbeb Remove intra-doc link as it resolves without reference link 
Co-authored-by: Joshua Nelson <joshua@yottadb.com>
 2020-08-12 08:28:55 +02:00
Denis Vasilik
c4923419c2 Revert broken link 2020-08-11 23:54:51 +02:00
Denis Vasilik
3c2eb18b9b Use intra-doc links 2020-08-11 22:16:31 +02:00
Poliorcetics
a308e74e13 Add some texts to make the tidy check for unsafe documentation pass 2020-08-11 21:37:22 +02:00
Alexis Bourget
91ba92b6df Change safety comment for usize with the one from LukasKalbertodt review 2020-08-11 21:23:00 +02:00
oliver-giersch
19c9674966 mentions provenance, changes argument type, adds must_use attr 2020-08-11 16:14:34 +02:00
Oliver Scherer
34c3c0dae5 Make <*const T>::is_null const fn 2020-08-11 11:45:47 +02:00
Ivan Tham
8ec348afdd Remove branch in optimized is_ascii 
Performs slightly better in short or medium bytes by eliminating
the last branch check on `byte_pos == len` and always check the
last byte as it is always at most one `usize`.

Benchmark, before `libcore`, after `libcore_new`. It improves
medium and short by 1ns but regresses unaligned_tail by 2ns,
either way we can get unaligned_tail have a tiny chance of 1/8
on a 64 bit machine. I don't think we should bet on that, the
probability is worse than dice.

test long::case00_libcore                     ... bench:          38 ns/iter (+/- 1) = 183947 MB/s
test long::case00_libcore_new                 ... bench:          38 ns/iter (+/- 1) = 183947 MB/s
test long::case01_iter_all                    ... bench:         227 ns/iter (+/- 6) = 30792 MB/s
test long::case02_align_to                    ... bench:          40 ns/iter (+/- 1) = 174750 MB/s
test long::case03_align_to_unrolled           ... bench:          19 ns/iter (+/- 1) = 367894 MB/s
test medium::case00_libcore                   ... bench:           5 ns/iter (+/- 0) = 6400 MB/s
test medium::case00_libcore_new               ... bench:           4 ns/iter (+/- 0) = 8000 MB/s
test medium::case01_iter_all                  ... bench:          20 ns/iter (+/- 1) = 1600 MB/s
test medium::case02_align_to                  ... bench:           6 ns/iter (+/- 0) = 5333 MB/s
test medium::case03_align_to_unrolled         ... bench:           5 ns/iter (+/- 0) = 6400 MB/s
test short::case00_libcore                    ... bench:           7 ns/iter (+/- 0) = 1000 MB/s
test short::case00_libcore_new                ... bench:           6 ns/iter (+/- 0) = 1166 MB/s
test short::case01_iter_all                   ... bench:           5 ns/iter (+/- 0) = 1400 MB/s
test short::case02_align_to                   ... bench:           5 ns/iter (+/- 0) = 1400 MB/s
test short::case03_align_to_unrolled          ... bench:           5 ns/iter (+/- 1) = 1400 MB/s
test unaligned_both::case00_libcore           ... bench:           4 ns/iter (+/- 0) = 7500 MB/s
test unaligned_both::case00_libcore_new       ... bench:           4 ns/iter (+/- 0) = 7500 MB/s
test unaligned_both::case01_iter_all          ... bench:          26 ns/iter (+/- 0) = 1153 MB/s
test unaligned_both::case02_align_to          ... bench:          13 ns/iter (+/- 2) = 2307 MB/s
test unaligned_both::case03_align_to_unrolled ... bench:          11 ns/iter (+/- 0) = 2727 MB/s
test unaligned_head::case00_libcore           ... bench:           5 ns/iter (+/- 0) = 6200 MB/s
test unaligned_head::case00_libcore_new       ... bench:           5 ns/iter (+/- 0) = 6200 MB/s
test unaligned_head::case01_iter_all          ... bench:          19 ns/iter (+/- 1) = 1631 MB/s
test unaligned_head::case02_align_to          ... bench:          10 ns/iter (+/- 0) = 3100 MB/s
test unaligned_head::case03_align_to_unrolled ... bench:          14 ns/iter (+/- 0) = 2214 MB/s
test unaligned_tail::case00_libcore           ... bench:           3 ns/iter (+/- 0) = 10333 MB/s
test unaligned_tail::case00_libcore_new       ... bench:           5 ns/iter (+/- 0) = 6200 MB/s
test unaligned_tail::case01_iter_all          ... bench:          19 ns/iter (+/- 0) = 1631 MB/s
test unaligned_tail::case02_align_to          ... bench:          10 ns/iter (+/- 0) = 3100 MB/s
test unaligned_tail::case03_align_to_unrolled ... bench:          13 ns/iter (+/- 0) = 2384 MB/s

Rough (unfair) maths on improvements for fun: 1ns * 7/8 - 2ns * 1/8 = 0.625ns

Inspired by fish and zsh clever trick to highlight missing linefeeds (⏎)
and branchless implementation of binary_search in rust.
 2020-08-11 14:40:39 +08:00
Dylan DPC
0a738d41b1 Rollup merge of #75379 - denisvasilik:intra-docs-links-core-cmp, r=Dylan-DPC 
Use intra-doc links in /library/core/src/cmp.rs

Helps with #75080.

@rustbot modify labels: T-doc, A-intra-doc-links, T-rustdoc

Known issues:

* Links from `core` to `std` (#74481):
    * [`Vec::sort_by_key`]
 2020-08-11 01:56:47 +02:00
Dylan DPC
d00c70363f Rollup merge of #75369 - denisvasilik:intra-doc-links-core-borrow, r=Manishearth 
Move to intra-doc links in /library/core/src/borrow.rs

Helps with #75080.

@rustbot modify labels: T-doc, A-intra-doc-links, T-rustdoc

Known issues:

* Links from `core` to `std` (#74481):
    * [`Box<T>`]
    * [`Mutex<T>`]
    * [`Rc<T>`]
    * [`String`]
    * [`HashMap<K, V>`]
 2020-08-11 01:56:45 +02:00
Denis Vasilik
eea85814e1 Use intra-doc links 2020-08-10 23:16:01 +02:00
Denis Vasilik
f260462c32 Remove links that are in scope 2020-08-10 23:14:43 +02:00
Denis Vasilik
d7e7271085 Remove AsRef link as it is in the prelude 2020-08-10 20:29:20 +02:00
Yuki Okushi
64d71095c3 Rollup merge of #75348 - denisvasilik:intra-doc-links-core-time, r=jyn514 
Move to intra-doc links in library/core/src/time.rs

Helps with #75080.
 2020-08-10 09:08:01 +09:00
Denis Vasilik
9e71c13f28 Add link for Duration 
Co-authored-by: Joshua Nelson <joshua@yottadb.com>
 2020-08-09 23:26:42 +02:00
Denis Vasilik
ce244210b1 Remove liNone as it is in the prelude 2020-08-09 23:12:30 +02:00
Denis Vasilik
7dba693f0e Use intra-doc links 2020-08-09 23:06:44 +02:00