Rollup of 6 pull requests #69851
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Rollup of 6 pull requests #69851
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Previously, attributes on 'if' expressions (e.g. #[attr] if true {})
were disallowed during parsing. This made it impossible for macros to
perform any custom handling of such attributes (e.g. stripping them
away), since a compilation error would be emitted before they ever had a
chance to run.
This PR permits attributes on 'if' expressions ('if-attrs' from here on).
Both built-in attributes (e.g. `#[allow]`, `#[cfg]`) are supported.
We still do *not* accept attributes on 'other parts' of an if-else
chain. That is, the following code snippet still fails to parse:
```rust
if true {} #[attr] else if false {} else #[attr] if false {} #[attr]
else {}
```
Additionally whenever possible match C API provided by the LLVM.
Although `stack_overflow::init` runs very early in the process, even before `main`, there may already be signal handlers installed for things like the address sanitizer. In that case, just leave it alone, and don't bother trying to allocate our own signal stacks either.
…=Centril
Permit attributes on 'if' expressions
Previously, attributes on 'if' expressions (e.g. `#[attr] if true {}`)
were disallowed during parsing. This made it impossible for macros to
perform any custom handling of such attributes (e.g. stripping them
away), since a compilation error would be emitted before they ever had a
chance to run.
This PR permits attributes on 'if' expressions ('if-attrs' from here on).
Both built-in attributes (e.g. `#[allow]`, `#[cfg]`) and proc-macro attributes are supported.
We still do *not* accept attributes on 'other parts' of an if-else
chain. That is, the following code snippet still fails to parse:
```rust
if true {} #[attr] else if false {} else #[attr] if false {} #[attr]
else {}
```
Closes rust-lang#68618
unix: Don't override existing SIGSEGV/BUS handlers Although `stack_overflow::init` runs very early in the process, even before `main`, there may already be signal handlers installed for things like the address sanitizer. In that case, just leave it alone, and don't bother trying to allocate our own signal stacks either. Fixes rust-lang#69524.
Ensure that validity only raises validity errors For now, only as a debug-assertion (similar to const-prop detecting errors that allocate). Now includes rust-lang#69646. [Relative diff](RalfJung/rust@layout-visitor...RalfJung:validity-errors). r? @oli-obk
librustc_codegen_llvm: Use slices in preference to 0-terminated strings Additionally whenever possible match C API provided by the LLVM.
rustc_parse: Remove `Parser::normalized(_prev)_token` Perform the "normalization" (renamed to "uninterpolation") on the fly when necessary. The final part of rust-lang#69579 rust-lang#69384 rust-lang#69376 rust-lang#69211 rust-lang#69034 rust-lang#69006. r? @Centril
Add more regression tests Closes rust-lang#54239 Closes rust-lang#57200 Closes rust-lang#57201 Closes rust-lang#60473 Closes rust-lang#64620 Closes rust-lang#67166 r? @Centril
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@bors r+ p=1001 rollup=never |
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📌 Commit 7e903f8 has been approved by |
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🌲 The tree is currently closed for pull requests below priority 1000, this pull request will be tested once the tree is reopened |
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☀️ Test successful - checks-azure |
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Mar 9, 2020
Tested on commit rust-lang/rust@3dbade6. Direct link to PR: <rust-lang/rust#69851> 💔 miri on windows: test-pass → test-fail (cc @oli-obk @eddyb @RalfJung). 💔 miri on linux: test-pass → test-fail (cc @oli-obk @eddyb @RalfJung).
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Successful merges:
Parser::normalized(_prev)_token#69801 (rustc_parse: RemoveParser::normalized(_prev)_token)Failed merges:
r? @ghost