Fix indentation of error message
So I just encountered this error for the first time. It's unclear what
it means, why I encountered it, or how to fix it. But worst of all, it
has a random newline and weird indentation! This commit fixes that last
bit.
<img width="680" alt="screen shot 2017-02-18 at 4 35 36 pm" src="https://cloud.githubusercontent.com/assets/1529387/23097087/0ef5ac4a-f5f9-11e6-9132-18ce759f7092.png">
Add Documentation for Custom Attributes and Error Reporting in Procedural Macros
This fixes#39821 .
I'm not sure if the process of how to access custom attributes should be documented as well.
But I feel, that this should rather be documented in `syn`
book: binary prefixed are defined by IEC and not in SI
Binary prefixes (such as Gi for ‘gibi-’ in GiB) are defined by
International Electrotechnical Commission (IEC) and not in the
International System of Units (SI).
Though to be honest I’d just reword the previous paragraph to use ‘1 GiB’.
test: Verify all sysroot crates are unstable
As we continue to add more crates to the compiler and use them to implement
various features we want to be sure we're not accidentally expanding the API
surface area of the compiler! To that end this commit adds a new `run-make` test
which will attempt to `extern crate foo` all crates in the sysroot, verifying
that they're all unstable.
This commit discovered that the `std_shim` and `test_shim` crates were
accidentally stable and fixes the situation by deleting those shims. The shims
are no longer necessary due to changes in Cargo that have happened since they
were originally incepted.
Create the Unstable Book
Part of https://github.com/rust-lang/rust/issues/39588
This isn't done yet. To do:
- [x] import the nightly book contents here
- [ ] possibly write some more chapters
This will _not_ be done before it lands; that's part of the whole unstable thing.
Port the reference to mdbook
Part of #39588.
This is only a work in progress. Still left to do:
- [x] double check contents weren't duplicated/lost with the move to individual pages (I'm going to do this)
- [x] fix up links [and footnotes](https://github.com/rust-lang/rust/pull/39855#issuecomment-280168170) (@frewsxcv has volunteered to help with this)
- [x] change `src/doc/reference.md` to redirect to the book
- [x] move the reference on the doc index to be part of the bookshelf
As we continue to add more crates to the compiler and use them to implement
various features we want to be sure we're not accidentally expanding the API
surface area of the compiler! To that end this commit adds a new `run-make` test
which will attempt to `extern crate foo` all crates in the sysroot, verifying
that they're all unstable.
This commit discovered that the `std_shim` and `test_shim` crates were
accidentally stable and fixes the situation by deleting those shims. The shims
are no longer necessary due to changes in Cargo that have happened since they
were originally incepted.
Turn off Vectorization for Emscripten
When targeting Emscripten, rustc emits Vector Instructions by default. However Web Assembly doesn't support Vector Instructions yet, which causes Binaryen to fail converting the intermediate asm.js code to Web Assembly. While asm.js kind of supports Vector Instructions, they aren't supported by any browser other than Firefox, often meaning that they need to be emulated very slowly. So it should just be turned off
for all Emscripten targets.
Fixes#38558
When targeting Emscripten, rustc emits Vector Instructions by default.
However Web Assembly doesn't support Vector Instructions yet, which
causes Binaryen to fail converting the intermediate asm.js code to Web
Assembly. While asm.js kind of supports Vector Instructions, they
aren't supported by any browser other than Firefox, often meaning that
they need to be emulated very slowly. So it should just be turned off
for all Emscripten targets.
Fixes#38558
