Trait StrExt 

pub trait StrExt {
    // Required methods
    fn substr_pos(&self, substr: &Self) -> Option<Span>;
    fn char_length(&self, byte_index: usize) -> Option<usize>;
    fn char_span(&self, byte_index: usize) -> Option<Span>;
}

Required Methods

fn substr_pos(&self, substr: &Self) -> Option<Span>

Gets the position of a substring within a string.

Example

let place = "mississippis";

let second_is: &str = place.matches("is").nth(1).unwrap();

assert_eq!(place.substr_pos(second_is), Some(Span::from(4..6)));

fn char_length(&self, byte_index: usize) -> Option<usize>

Gets the length of the character starting at byte_index

fn char_span(&self, byte_index: usize) -> Option<Span>

Gets the range of the character starting at byte_index

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl StrExt for str

fn substr_pos(&self, substr: &Self) -> Option<Span>

fn char_length(&self, byte_index: usize) -> Option<usize>

fn char_span(&self, byte_index: usize) -> Option<Span>

Implementors