1312: Introduce TokenBuffer r=matklad a=edwin0cheng
As discussed in Zulip, this PR Introduce `TokenBuffer` , a safe version of `syn` crate `TokenBuffer` which support cursor based traversal of `tt::TokenTree`. This is the basis of incoming refactoring of `TokenSource` iterator based API.
This PR do the following things:
* Add TokenBuffer in `ra_tt` crate.
* Try to use this new API to refactor the `SubtreeSource` to prove it usage.
Co-authored-by: Edwin Cheng <edwin0cheng@gmail.com>
1281: Move arm cond to match guard r=matklad a=unrealhoang
I did split the rename to another commit, yet Github UI still show entirely new file change. Please review using commits.
Co-authored-by: Unreal Hoang <unrealhoang@gmail.com>
1299: Use ThemeColor and add support for light themes r=matklad a=lnicola
Part of #1294.
- switch to `ThemeColor`
- add light and high contrast theme definitions
- highlight control flow keywords and `unsafe`
Co-authored-by: Laurențiu Nicola <lnicola@dend.ro>
1287: Add support of matching literal in mbe r=matklad a=edwin0cheng
This PR adds support of matching literal in mbe , which used in our `T` macro :
```rust
macro_rules! foo {
('(') => {
fn foo() {}
}
}
```
Co-authored-by: Edwin Cheng <edwin0cheng@gmail.com>
1286: Add infer for generic default type r=flodiebold a=edwin0cheng
This PR add infer support for generic default type:
```
struct Gen<T=u32> {
val: T
}
```
* add the (unresolved) defaults from the definition to GenericParams
* add a query generic_defaults that resolves those defaults to types and returns a Substs
* add the missing type in `substs_from_path_segment`
* add tests
based on the idea in this [comment](https://github.com/rust-analyzer/rust-analyzer/issues/1099#issuecomment-484206279)
Co-authored-by: Edwin Cheng <edwin0cheng@gmail.com>
