035e458f0a
If a crate has a feature with `+` in it's name,
the `%__cargo_feature_from_name` macro fails to correctly parse it.
For example, the `cxxbridge-flags` crate declares (among others)
the `c++20` feature; that is currently parsed as follows:
```lua
> string.match("cxxbridge-flags+c++20-devel", "^.+%+(.+)-devel$")
20
```
The adjusted regex matches the *first* `+` as feature name separator:
```lua
> string.match("cxxbridge-flags+c++20-devel", "^[^+]+%+(.+)-devel$")
c++20
```
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| .. | ||
| cargo.attr | ||
| macros.cargo | ||
| macros.rust | ||
| macros.rust-srpm | ||