Trait SubsliceOffset

pub trait SubsliceOffset {
    // Required method
    fn subslice_offset<'a>(&'a self, inner: &'a Self) -> Option<usize>;
}

Required Methods

fn subslice_offset<'a>(&'a self, inner: &'a Self) -> Option<usize>

Returns the byte offset of an inner slice relative to an enclosing outer slice.

Examples

let string = "a\nb\nc";
let lines: Vec<&str> = string.lines().collect();
assert_eq!(string.subslice_offset(lines[0]), Some(0)); // &"a"
assert_eq!(string.subslice_offset(lines[1]), Some(2)); // &"b"
assert_eq!(string.subslice_offset(lines[2]), Some(4)); // &"c"
assert_eq!(string.subslice_offset("other!"), None);

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 SubsliceOffset for str

fn subslice_offset<'a>(&'a self, inner: &'a Self) -> Option<usize>

impl<T> SubsliceOffset for [T]

fn subslice_offset<'a>(&'a self, inner: &'a Self) -> Option<usize>

Implementors