Since type Validator<T> = fn(&T) -> bool;, i can't do something like:
let existing_filenames = read_dir(...);
Readline::default()
.title("Name new file:")
.validator(|name| !existing_filenames.contains(name.to_string()), |name| format!("File {} already exists", name))
.prompt()?
.run()?;Suggest swapping this to something like type Validator<T> = Box<dyn Fn(&T) -> bool>;
Since
type Validator<T> = fn(&T) -> bool;, i can't do something like:Suggest swapping this to something like
type Validator<T> = Box<dyn Fn(&T) -> bool>;