Trait IndexToUsize 

pub trait IndexToUsize: Display {
    // Required method
    fn negative_to_usize(self, len: usize) -> Option<usize>;

    // Provided method
    fn try_negative_to_usize(self, len: usize) -> Result<usize, PolarsError>
       where Self: Sized + Copy { ... }
}

Required Methods

fn negative_to_usize(self, len: usize) -> Option<usize>

Translate the negative index to an offset.

Provided Methods

fn try_negative_to_usize(self, len: usize) -> Result<usize, PolarsError>

where Self: Sized + Copy,

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl<I> IndexToUsize for I

where I: PartialOrd + PartialEq + NumCast + Signed + Zero + Display,