Trait Symbol

pub trait Symbol:
    Copy
    + Ord
    + Eq {
    // Required methods
    fn from_usize(val: usize) -> Self;
    fn to_usize(self) -> usize;
}

Types implementing this trait are able to act as symbols for string interners.

Symbols are returned by StringInterner::get_or_intern and allow look-ups of the original string contents with StringInterner::resolve.

Note

Optimal symbols allow for efficient comparisons and have a small memory footprint.

Required Methods

fn from_usize(val: usize) -> Self

Creates a symbol from a usize.

Note

Implementations panic if the operation cannot succeed.

fn to_usize(self) -> usize

Returns the usize representation of self.

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 Symbol for usize

fn from_usize(val: usize) -> Self

fn to_usize(self) -> usize

Implementors

impl Symbol for Sym