6158: Fix for negative literals in macros r=matklad a=cutsoy _This pull request fixes #6028._ When writing `-42.0f32` in Rust, it is usually parsed as two different tokens (a minus operator and a float literal). But a procedural macro can also generate new tokens, including negative [float literals](https://doc.rust-lang.org/stable/proc_macro/struct.Literal.html#method.f32_suffixed): ```rust #[proc_macro] fn example_verbose(input: TokenStream) -> TokenStream { let literal = Literal::f32_suffixed(-42.0); quote! { #literal } } ``` or even shorter ```rust #[proc_macro] fn example(input: TokenStream) -> TokenStream { let literal = -42.0f32; quote! { #literal } } ``` Unfortunately, these currently cause RA to crash: ``` thread '<unnamed>' panicked at 'Fail to convert given literal Literal { text: "-42.0f32", id: TokenId( 4294967295, ), }', crates/mbe/src/subtree_source.rs:161:28 ``` This pull request contains both a fix 8cf9362 and a unit test 27798ee. In addition, I installed the patched server with `cargo xtask install --server` and verified in VSCode that it no longer crashes when a procedural macro returns a negative number literal. Co-authored-by: Tim <tim@glacyr.com>
rust-analyzer is an experimental modular compiler frontend for the Rust language. It is a part of a larger rls-2.0 effort to create excellent IDE support for Rust.
Work on rust-analyzer is sponsored by
Quick Start
https://rust-analyzer.github.io/manual.html#installation
Documentation
If you want to contribute to rust-analyzer or are just curious about how things work under the hood, check the ./docs/dev folder.
If you want to use rust-analyzer's language server with your editor of choice, check the manual folder. It also contains some tips & tricks to help you be more productive when using rust-analyzer.
Communication
For usage and troubleshooting requests, please use "IDEs and Editors" category of the Rust forum:
https://users.rust-lang.org/c/ide/14
For questions about development and implementation, join rls-2.0 working group on Zulip:
https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frls-2.2E0
Quick Links
- Website: https://rust-analyzer.github.io/
- Metrics: https://rust-analyzer.github.io/metrics/
- API docs: https://rust-analyzer.github.io/rust-analyzer/ide/
License
Rust analyzer is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0).
See LICENSE-APACHE and LICENSE-MIT for details.