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This adds a pretty contrived example of the usage of fmt::Error. I am
very open to suggestions for a better one.
I have also highlighted the fmt::Error vs std::error::Error.
r? @steveklabnik
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Change the for-loop desugar so the `break` does not affect type inference. Fixes #42618
Rewrite the `for` loop desugaring to avoid contaminating the inference results. Under the older desugaring, `for x in vec![] { .. }` would erroneously type-check, even though the type of `vec![]` is unconstrained. (written by @nikomatsakis)
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Rollup of 4 pull requests
- Successful merges: #42799, #42804, #42805, #42806
- Failed merges:
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rustbuild: Fix compiler docs yet again
Add support for `-Z force-unstable-if-unmarked` to rustdoc.
r? @alexcrichton
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Pass path to python from bootstrap.py to bootstrap.rs
When bootstrap is executed with python not in `$PATH`, (e. g.
`c:\Python27\python.exe x.py test`) bootstrap cannot find python
and crashes.
This commit passes path to python in `BOOTSTRAP_PYTHON` env var.
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Make rustc errors colorful.
Rustbuild passes --message-format=json to Cargo to learn about the
dependencies for a given build, which then makes Cargo steal the
stderr/stdout for the compiler process, leading to non colorful output.
To avoid this, detection of stderr being a tty is added to rustbuild,
and an environment variable is used to communicate with the rustc shim.
Fixes https://github.com/rust-lang/rust/issues/42801.
r? @alexcrichton
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Impl Clone for DefaultHasher
It's useful for a hasher to be `Clone`. It's also strange for any type to not be `Clone`. `DefaultHasher` is not meant to be used directly, but being in std it can be useful as a placeholder. I don't see any forward compatibility hazard if the hasher is changed since it's very rare for something to not be `Clone`.
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Better Debug for Args and ArgsOs
Display actual args instead of two dots.
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debuginfo: Work around crash-bug in MSDIA library
Fixes https://github.com/rust-lang/rust/issues/40477 (which also contains a description of the issue being fixed).
r? @vadimcn
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Fixes bootstrapping with custom cargo/rustc.
config.mk is now always read when parsing the configuration to prevent
this from reoccurring in the future, hopefully.
Fixes https://github.com/rust-lang/rust/issues/42543.
r? @alexcrichton
cc @infinity0 @kyrias
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Integrate jobserver support to parallel codegen
This commit integrates the `jobserver` crate into the compiler. The crate was
previously integrated in to Cargo as part of rust-lang/cargo#4110. The purpose
here is to two-fold:
* Primarily the compiler can cooperate with Cargo on parallelism. When you run
`cargo build -j4` then this'll make sure that the entire build process between
Cargo/rustc won't use more than 4 cores, whereas today you'd get 4 rustc
instances which may all try to spawn lots of threads.
* Secondarily rustc/Cargo can now integrate with a foreign GNU `make` jobserver.
This means that if you call cargo/rustc from `make` or another
jobserver-compatible implementation it'll use foreign parallelism settings
instead of creating new ones locally.
As the number of parallel codegen instances in the compiler continues to grow
over time with the advent of incremental compilation it's expected that this'll
become more of a problem, so this is intended to nip concurrent concerns in the
bud by having all the tools to cooperate!
Note that while rustc has support for itself creating a jobserver it's far more
likely that rustc will always use the jobserver configured by Cargo. Cargo today
will now set a jobserver unconditionally for rustc to use.
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mark calls in the unwind path as !noinline
The unwind path is always cold, so that should not have bad performance
implications. This avoids catastrophic exponential inlining, and also
decreases the size of librustc.so by 1.5% (OTOH, the size of `libstd.so`
increased by 0.5% for some reason).
Fixes #41696.
r? @nagisa
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Add support for `-Z force-unstable-if-unmarked` to rustdoc.
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Rustbuild passes --message-format=json to Cargo to learn about the
dependencies for a given build, which then makes Cargo steal the
stderr/stdout for the compiler process, leading to non colorful output.
To avoid this, detection of stderr being a tty is added to rustbuild,
and an environment variable is used to communicate with the rustc shim.
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When bootstrap is executed with python not in `$PATH`, (e. g.
`c:\Python27\python.exe x.py test`) bootstrap cannot find python
and crashes.
This commit passes path to python in `BOOTSTRAP_PYTHON` env var.
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Rollup of 4 pull requests
- Successful merges: #42397, #42620, #42762, #42766
- Failed merges:
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Update rls-data version
And update the RLS submod
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Disable repr(simd) in mem::swap on Redox
This addresses https://github.com/rust-lang/rust/issues/42761
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Add compile_error!
Related to #40872
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Implement Sync for SyncSender
r? @alexcrichton
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This commit integrates the `jobserver` crate into the compiler. The crate was
previously integrated in to Cargo as part of rust-lang/cargo#4110. The purpose
here is to two-fold:
* Primarily the compiler can cooperate with Cargo on parallelism. When you run
`cargo build -j4` then this'll make sure that the entire build process between
Cargo/rustc won't use more than 4 cores, whereas today you'd get 4 rustc
instances which may all try to spawn lots of threads.
* Secondarily rustc/Cargo can now integrate with a foreign GNU `make` jobserver.
This means that if you call cargo/rustc from `make` or another
jobserver-compatible implementation it'll use foreign parallelism settings
instead of creating new ones locally.
As the number of parallel codegen instances in the compiler continues to grow
over time with the advent of incremental compilation it's expected that this'll
become more of a problem, so this is intended to nip concurrent concerns in the
bud by having all the tools to cooperate!
Note that while rustc has support for itself creating a jobserver it's far more
likely that rustc will always use the jobserver configured by Cargo. Cargo today
will now set a jobserver unconditionally for rustc to use.
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Display actual args instead of two dots.
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Memoize types in `is_representable` to avoid exponential worst-case
I could have made representability a cached query, but that would have
been added complexity for not much benefit - outside of the exponential
worst-case, this pass is fast enough already.
Fixes #42747.
r? @eddyb
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Update LLVM to pick StackColoring improvement
Fixes #40883.
r? @eddyb
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Remove in-tree flate/getopts crates
Remove `src/libflate` in favor of `flate2` on crates.io and `src/libgetopts` in favor of `getopts` on crates.io. The replacements have slightly different APIs and the usage in the compiler has been updated to reflect this.
This uncovered an unfortunate limitation of the compiler today to deal with linking everything correctly, and the workaround can be found documented in `src/librustc/Cargo.toml`.
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Add a Read::initializer method
This is an API that allows types to indicate that they can be passed
buffers of uninitialized memory which can improve performance.
cc @SimonSapin
r? @alexcrichton
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This is an API that allows types to indicate that they can be passed
buffers of uninitialized memory which can improve performance.
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Clearer Error Message for Duplicate Definition
Clearer use of the error message and span labels to communicate duplication definitions/imports.
fixes #42061
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config.mk is now always read when parsing the configuration to prevent
this from reoccurring in the future, hopefully.
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Rollup of 6 pull requests
- Successful merges: #42271, #42717, #42728, #42749, #42756, #42772
- Failed merges:
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Update libc to 0.2.24
Fixes #42427.
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Show type name for unused_must_use lint
Fix #42688.
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Additions/improvements for doc examples.
None
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resolve: fix perf bug
Fixes #42544.
r? @nrc
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Convert `Into<Box<[T]>> for Vec<T>` into `From<Vec<T>> for Box<[T]>`
As the `collections` crate has been merged into `alloc` in #42648 this impl is now possible. This is the final part of #42129 missing from #42227.
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add `FromStr` Impl for `char`
fixes #24939.
is it possible to use pub(restricted) instead of using a stability attribute for the internal error representation? is it needed at all?
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This commit deletes the in-tree `getopts` crate in favor of the crates.io-based
`getopts` crate. The main difference here is with a new builder-style API, but
otherwise everything else remains relatively standard.
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The unwind path is always cold, so that should not have bad performance
implications. This avoids catastrophic exponential inlining, and also
decreases the size of librustc.so by 1.5% (OTOH, the size of `libstd.so`
increased by 0.5% for some reason).
Fixes #41696.
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