Changes:
````
Rustup for https://github.com/rust-lang/rust/pull/59042
Update pulldown_cmark to 0.5
Only run AppVeyor on r+, try and the master branch
Remove approx_constant known problems
Suppress let_and_return if let has attributes
Add test for or_fun_call macro suggestion
UI test cleanup: Extract needless_range_loop tests
Change "if types change" to "if you later change the type"
````
This also bumps RLS version to 1.36.
The updated rls-* packages use serde but *not* serde_derive thanks to
manual proc macro expansion. This is a hack, since rustc cannot handle
crates.io proc macros (duplicated in tools) when cross-compiling, so
that's the best we can do in order to support serde_json in save-analysis.
Changes:
````
Update compiletest_rs
Typo
Fix dogfood error
Add lint PathBufPushOverwrite
Update *.stderr file
Remove code duplication
Format code
Add test for debug_assert!(false)
Don't lint debug_assert!(false)
Add run-rustfix for option_map_or_none lint
Move two cast_lossless tests to their correct files
Change naive_bytecount applicability MaybeIncorrect
Add tests for declare_lint_pass and impl_lint_pass
Use lint pass macros
Document `declare_lint_pass!`
Fix lint_without_lint_pass internal lint
Use {get,match}_def_path from LateContext
Remove uplifted functions {get,match}_def_path from Clippy
Add run-rustfix for len_zero lint
Add run-rustfix for bool_comparison lint
Add run-rustfix for deref_addrof lint
while_let_loop uses placeholders in suggestions
Remove rust-toolchain file from clippy_dev
Update adding_lints.md
Update PULL_REQUEST_TEMPLATE
Add new lint checklist
Create PULL_REQUEST_TEMPLATE
Only suggest .copied() for Option right now
Also suggest .copied() when .clone() is called on a Copy type
Suggest .copied() instead of .cloned() in map_clone when dealing with references
Deny rustc internal lints
Remove clippy::default_hash_types internal lint
Enable -Zunstable-options in .cargo/config
````
update polonius-engine
This updates polonius-engine to [version 0.7.0](https://github.com/rust-lang/polonius/blob/master/RELEASES.md#v070), which adds a hybrid algorithm that starts off with performing a cheaper, location-insensitive analysis before proceeding with the full analysis.
r? @nikomatsakis
Turns out we needed to exclude a number of math functions on the
`wasm32-unknown-wasi` target, and this was fixed in 0.1.9 of
compiler-builtins and this is pulling in the fix to libstd's own build.
This commit adds a new wasm32-based target distributed through rustup,
supported in the standard library, and implemented in the compiler. The
`wasm32-unknown-wasi` target is intended to be a WebAssembly target
which matches the [WASI proposal recently announced.][LINK]. In summary
the WASI target is an effort to define a standard set of syscalls for
WebAssembly modules, allowing WebAssembly modules to not only be
portable across architectures but also be portable across environments
implementing this standard set of system calls.
The wasi target in libstd is still somewhat bare bones. This PR does not
fill out the filesystem, networking, threads, etc. Instead it only
provides the most basic of integration with the wasi syscalls, enabling
features like:
* `Instant::now` and `SystemTime::now` work
* `env::args` is hooked up
* `env::vars` will look up environment variables
* `println!` will print to standard out
* `process::{exit, abort}` should be hooked up appropriately
None of these APIs can work natively on the `wasm32-unknown-unknown`
target, but with the assumption of the WASI set of syscalls we're able
to provide implementations of these syscalls that engines can implement.
Currently the primary engine implementing wasi is [wasmtime], but more
will surely emerge!
In terms of future development of libstd, I think this is something
we'll probably want to discuss. The purpose of the WASI target is to
provide a standardized set of syscalls, but it's *also* to provide a
standard C sysroot for compiling C/C++ programs. This means it's
intended that functions like `read` and `write` are implemented for this
target with a relatively standard definition and implementation. It's
unclear, therefore, how we want to expose file descriptors and how we'll
want to implement system primitives. For example should `std::fs::File`
have a libc-based file descriptor underneath it? The raw wasi file
descriptor? We'll see! Currently these details are all intentionally
hidden and things we can change over time.
A `WasiFd` sample struct was added to the standard library as part of
this commit, but it's not currently used. It shows how all the wasi
syscalls could be ergonomically bound in Rust, and they offer a possible
implementation of primitives like `std::fs::File` if we bind wasi file
descriptors exactly.
Apart from the standard library, there's also the matter of how this
target is integrated with respect to its C standard library. The
reference sysroot, for example, provides managment of standard unix file
descriptors and also standard APIs like `open` (as opposed to the
relative `openat` inspiration for the wasi ssycalls). Currently the
standard library relies on the C sysroot symbols for operations such as
environment management, process exit, and `read`/`write` of stdio fds.
We want these operations in Rust to be interoperable with C if they're
used in the same process. Put another way, if Rust and C are linked into
the same WebAssembly binary they should work together, but that requires
that the same C standard library is used.
We also, however, want the `wasm32-unknown-wasi` target to be
usable-by-default with the Rust compiler without requiring a separate
toolchain to get downloaded and configured. With that in mind, there's
two modes of operation for the `wasm32-unknown-wasi` target:
1. By default the C standard library is statically provided inside of
`liblibc.rlib` distributed as part of the sysroot. This means that
you can `rustc foo.wasm --target wasm32-unknown-unknown` and you're
good to go, a fully workable wasi binary pops out. This is
incompatible with linking in C code, however, which may be compiled
against a different sysroot than the Rust code was previously
compiled against. In this mode the default of `rust-lld` is used to
link binaries.
2. For linking with C code, the `-C target-feature=-crt-static` flag
needs to be passed. This takes inspiration from the musl target for
this flag, but the idea is that you're no longer using the provided
static C runtime, but rather one will be provided externally. This
flag is intended to also get coupled with an external `clang`
compiler configured with its own sysroot. Therefore you'll typically
use this flag with `-C linker=/path/to/clang-script-wrapper`. Using
this mode the Rust code will continue to reference standard C
symbols, but the definition will be pulled in by the linker configured.
Alright so that's all the current state of this PR. I suspect we'll
definitely want to discuss this before landing of course! This PR is
coupled with libc changes as well which I'll be posting shortly.
[LINK]:
[wasmtime]:
Update rustfmt to 1.2.0
This release includes bug fixes and performance improvements from 1.1.0. Also it adds a new rustfmt tool attribute `#[rustfmt::skip::macros]`, which lets you skip formatting macro calls of your choice.
cc @nrc @Centril @Xanewok
