strum::EnumString deriving TryFrom<&str> means From<&str> cannot be implemented

[MingweiSamuel]

In strum 0.23 the EnumString derive now implements TryFrom<&str> as well in #186

Problem with this is that TryFrom<&str> is automatically derived for &str: Into<MyEnum>: https://doc.rust-lang.org/stable/std/convert/trait.TryFrom.html#impl-TryFrom%3CU%3E-for-T

This means that after strum 0.22 it is no longer possible to implement From<&str> for MyEnum and/or Into<MyEnum> for &str. We would want to implement those especially if we have a #[strum(default)] field which would make parsing infallible (?).

Besides reverting, another fix would be to automatically implement From/Into if parsing is infallible

Same as #228 I imagine

[clouds56]

Is it possible to have strum generate a function try_from_str without implement TryFrom?
Since I'd like to handle some corner case myself.

[stjepangolemac]

Just came across this too. So there's no way to use EnumString for versions above 0.22?

[Peternator7]

This one-use case doesn't work, but it's not generally/totally broken no.

I would accept a PR to make the impl infallible if there's a default. it'd be a breaking change, but generally more accurate I'd say