43253c508d
6102: Fix MergingBehaviour::Last creating unintuitive import trees r=jonas-schievink a=Veykril
The way this behaviour currently works is actually a bit weird. Imagine the following three imports get requested for insertion in the given order:
- `winapi::um::d3d11::ID3D11Device`
- `winapi::shared::dxgiformat::DXGI_FORMAT`
- `winapi::um::d3d11::D3D11_FILTER`
After the first two you will have the following tree:
```rust
use winapi::{shared::dxgiformat::DXGI_FORMAT, um::d3d11::ID3D11Device};
```
which is to be expected as they arent nested this kind of merging is allowed, but now importing the third one will result in:
```rust
use winapi::{shared::dxgiformat::DXGI_FORMAT, um::d3d11::ID3D11Device, um::d3d11::D3D11_FILTER};
```
which is still fine according to the rules, but it looks weird(at least in my eyes) due to the long paths that are quite similar. The changes in this PR will change the criteria for when to reject `Last` merging, it still disallows multiple nesting but it also only allows single segment paths inside of the `UseTreeList`. With this change you get the following tree after the first two imports:
```rust
use winapi::um::d3d11::ID3D11Device;
use winapi::shared::dxgiformat::DXGI_FORMAT;
```
and after the third:
```rust
use winapi::shared::dxgiformat::DXGI_FORMAT;
use winapi::um::d3d11::{ID3D11Device, D3D11_FILTER};
```
Which I believe looks more like what you would expect.
Co-authored-by: Lukas Wirth <lukastw97@gmail.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.