Add compiler docs testing to CI.
Fixes#47025.
I don't know if `x86_64-gnu` is the right builder for this, but there seems to be time left on [Travis](https://travis-ci.org/rust-lang/rust/jobs/307488864).
Remaining problems blocking this PR:
- [x] broken links caused by rustdoc issues:
- [x] `pub use self::Enum::...`: #46766 and #46767 (fixed by #47050, thanks @ollie27!)
- [x] `impl Deref for DerefToStdType`: #32129 (ignored in linkchecker)
- [x] `#[feature(decl_macro)]` and `use std::vec`: #47038 (ignored in linkchecker)
- [x] `rustc_data_structures::sync::{Lrc, RwLock}` aliases `std` types: #32130 (ignored in linkchecker)
- [x] markdown differences, in rust repository and in external crates, now failing the build with #46880 merged (all fixed)
- [x] multiple crate updates needed: `rand`, `log`, `parking_lot_core`, `flate2`
- [x] submodule updates needed to deduplicate dependencies: `rust-installer`, ~`cargo`~ (done by #47052)
- [x] #44953 test broken by `log` update (removed, this can be controversial)
- [x] Waiting `x86_64-gnu` build results ([done](https://travis-ci.org/rust-lang/rust/builds/323451069))
See individual commits for more details.
It tested #44953.
`log` macros in newer versions are no longer recursive, so these duplicated
error messages (about unstable feature uses) previously occurring at each
level of recursion are no longer possible, even with the fix by #45540.
Furthermore this test breaks when multiple versions of `log` are in the
sysroot (`log 0.3.9` depends on`log 0.4.1`)
Reword trying to operate in immutable fields
The previous message ("cannot assign/mutably borrow immutable field")
when trying to modify a field of an immutable binding gave the
(incorrect) impression that fields can be mutable independently of their
ADT's binding. Slightly reword the message to read "cannot
assign/mutably borrow field of immutable binding".
Re #35937.
Allow lifetimes in macros
This is a resurrection of PR #41927 which was a resurrection of #33135, which is intended to fix#34303.
In short, this allows macros_rules! to use :lifetime as a matcher to match 'lifetimes.
Still to do:
- [x] Feature gate
Add a tidy check for missing or too many trailing newlines.
I've noticed recently there are lots of review comments requesting to fix trailing newlines. If this is going to be an official style here, it's better to let the CI do this repetitive check.
The previous message ("cannot assign/mutably borrow immutable field")
when trying to modify a field of an immutable binding gave the
(incorrect) impression that fields can be mutable independently of their
ADT's binding. Slightly reword the message to read "cannot
assign/mutably borrow field of immutable binding".
It's unnecessary to print the linker options if there is no linker installed.
Currently, for libraries, the output is still printed, see #46998 for
discussion
in which leading zeroes on tuple-struct accesses are abjured
Resolves#47073. If accepted, a point in the compatibility section of the release notes is warranted.
rustdoc: Don't try to generate links for modules in import paths
The modules may be private or may even be enums so it would generate dead links.
Fixes#29814Fixes#46766Fixes#46767
Started rebasing @sgrif's PR #33135 off of current master. (Well, actually merging it into a new branch based off current master.)
The following files still need to be fixed or at least reviewed:
- `src/libsyntax/ext/tt/macro_parser.rs`: calls `Parser::parse_lifetime`, which doesn't exist anymore
- `src/libsyntax/parse/parser.rs`: @sgrif added an error message to `Parser::parse_lifetime`. Code has since been refactored, so I just took it out for now.
- `src/libsyntax/ext/tt/transcribe.rs`: This code has been refactored bigtime. Not sure whether @sgrif's changes here are still necessary. Took it out for this commit.
Pass correct span when lowering grouped imports
Solves incorrect diagnostics for unused or deprecated imports. Closes#46576.
Deprecated imports had an existing test which asserted the incorrect span.
That test has been corrected as part of this commit.
Do not expand a derive invocation when derive is not allowed
Closes#46655.
The first commit is what actually closes#46655. The second one is just a refactoring I have done while waiting on a test.
Implements RFC 1937: `?` in `main`
This is the first part of the RFC 1937 that supports new
`Termination` trait in the rust `main` function.
Thanks @nikomatsakis, @arielb1 and all other people in the gitter channel for all your help!
The support for doctest and `#[test]` is still missing, bu as @nikomatsakis said, smaller pull requests are better :)
rustc_trans: support ZST indexing involving uninhabited types.
Fixes#46855 in a minimal way. I decided against supporting non-memory `Rvalue::Len` in this PR (see https://github.com/rust-lang/rust/issues/46855#issuecomment-352965807), as `PlaceContext::Inspect` is also used for `Rvalue::Discriminant`.
r? @arielb1
rustc: don't use union layouts for tagged union enums.
Fixes#46897, fixes#43517 (AFAICT from the testcases).
This PR doesn't add any testcases, we should try to at least get perf ones (cc @Mark-Simulacrum).
I couldn't find an example in those issues where the choice of LLVM array vs struct (with N identical fields) for padding filler types is still needed, *on top of* this change, to prevent excessive LLVM sinking.
r? @arielb1
Make the output of the column! macro 1 based
Fixes #46868.
I didn't add any regression tests as the change already had to change tests inside the codebase.
r? @dtolnay
[MIR Borrowck] Moveck inline asm statements
Closes#45695
New behavior:
* Input operands to `asm!` are moved, direct output operands are initialized.
* Direct, non-read-write outputs match the assignment changes in #46752 (Shallow writes, end borrows).
Solves incorrect diagnostics for unused or deprecated imports. Closes#46576.
Deprecated imports had an existing test which asserted the incorrect span.
That test has been corrected as part of this commit.
1. Change the return type of `expand_invoc()` and its subroutines to
`Option<Expansion>` from `Expansion`.
2. Return `None` when expanding a derive invocation if the item cannot
have derive on it (in `expand_derive_invoc()`).
