Impl From<String> for ColoredString

[mahor1221]

Complements impl<'a> From<&'a str> for ColoredString.

[hwittenborn]

Why's this needed @mahor1221? Running String::from("blue").blue() locally works just fine, is there some other use case you're needing?

[mahor1221]

I frequently use the into() method in my codebase as it makes refactoring easier and I want to maintain consistency and avoid using any alternative methods. For example:

fn paint(vec: Vec<String>) -> ColoredString {
  vec
    .iter()
    .map(|_| todo!())
    .collect::<String>()
    .into()
}

In the code above, if I change ColoredString to another type, such as NewTypeFromColoredString, and this new type implements the From or Into trait, the code should work without requiring additional changes.

[JustAnotherCodemonkey]

Is there anything blocking this? This functionality would be nice and I'm very surprised that this has not happened yet. From<&str> is not good enough since it requires both an additional copy and a new heap allocation where From would simply consume the underlying String into the ColoredString struct, maintaining the allocation and avoiding copying/moving the underlying str data. As @hwittenborn mentioned, it is possible to call any of the ColoredString-creating methods on a String but this simply goes down the Deref to the str underneath which once again results in an inherent heap allocation plus a memcpy for the data. I understand that it's rare that you're creating lots of ColoredStrings from Strings but I looked into this based on a use case where exactly that happens and this extremely small and simple addition of functionality could lead to vastly improved performance on these plaintext String to ColoredString conversions.

[kurtlawrence]

Thanks @mahor1221!