Trait Pattern 

pub trait Pattern {
    // Required method
    fn is_matching(&self, val: char) -> bool;
}

While https://github.com/rust-lang/rust/issues/27721 is pending we need to define our own minimal Pattern trait.

Pattern type	Match condition
char	is contained in string
&[char]	any char in slice is contained in string
F: FnMut(char) -> bool	F returns true for a char in string

Required Methods

fn is_matching(&self, val: char) -> bool

Returns whether the character is matching the pattern.

Dyn Compatibility

This trait is dyn compatible.

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

Implementations on Foreign Types

impl Pattern for &[char]

fn is_matching(&self, val: char) -> bool

impl Pattern for char

fn is_matching(&self, val: char) -> bool

Implementors

impl<F: Fn(char) -> bool> Pattern for F