Trait regex_charclass::CharacterClass

pub trait CharacterClass: Sized {
    // Required methods
    fn new_from_range_u32<R: RangeBounds<u32>>(range: R) -> Option<Self>;
    fn new_from_range_char<R: RangeBounds<char>>(range: R) -> Self;
    fn get_cardinality(&self) -> u32;
    fn to_regex(&self) -> String;
}

A trait for RangeSet<Char> to hold ranges of char.

Example:

use regex_charclass::{irange::{RangeSet, range::AnyRange}, char::Char, CharacterClass};
 
let range1 = RangeSet::new_from_range_char('a'..='z');
assert_eq!(26, range1.get_cardinality());
assert_eq!("[a-z]", range1.to_regex());
 
let range2 = RangeSet::new_from_ranges(&[
    AnyRange::from(Char::new('0')..=Char::new('9')),
    AnyRange::from(Char::new('A')..=Char::new('F')),
    AnyRange::from(Char::new('a')..=Char::new('f')),
]);
assert_eq!("\\p{ASCII_Hex_Digit}", range2.to_regex());
 
let range2_complement = range2.complement();
assert_eq!("\\P{ASCII_Hex_Digit}", range2_complement.to_regex());
 
 
assert_eq!(".", range2.union(&range2_complement).to_regex());
assert_eq!("[]", range2.intersection(&range2_complement).to_regex());
 
assert_eq!("[g-z]", range1.difference(&range2).to_regex());

Required Methods

fn new_from_range_u32<R: RangeBounds<u32>>(range: R) -> Option<Self>

fn new_from_range_char<R: RangeBounds<char>>(range: R) -> Self

fn get_cardinality(&self) -> u32

fn to_regex(&self) -> String

Object Safety

This trait is not object safe.

Implementations on Foreign Types

impl CharacterClass for RangeSet<Char>

fn new_from_range_u32<R: RangeBounds<u32>>(range: R) -> Option<Self>

Create a new instance from the given range of u32, return None if the char codes are invalid.

Example:

use regex_charclass::{irange::RangeSet, CharacterClass};
  
let range = RangeSet::new_from_range_u32(97..=122);

fn new_from_range_char<R: RangeBounds<char>>(range: R) -> Self

Create a new instance from the given range of char.

Example:

use regex_charclass::{irange::RangeSet, CharacterClass};
  
let range = RangeSet::new_from_range_char('a'..='z');

fn get_cardinality(&self) -> u32

Return the number of possible char contained.

Example:

use regex_charclass::{char::Char, irange::RangeSet, CharacterClass};
  
let range = RangeSet::new_from_range_char('a'..='z');
assert_eq!(26, range.get_cardinality());

fn to_regex(&self) -> String

Return a valid regular expression character class.

Example:

use regex_charclass::{irange::{RangeSet, range::AnyRange}, char::Char, CharacterClass};
  
let range = RangeSet::new_from_range_char('a'..='z');
assert_eq!("[a-z]", range.to_regex());

let range = RangeSet::<Char>::new_from_ranges(&[
    AnyRange::from(Char::new('0')..=Char::new('9')),
    AnyRange::from(Char::new('A')..=Char::new('F')),
    AnyRange::from(Char::new('a')..=Char::new('f')),
]);
assert_eq!("\\p{ASCII_Hex_Digit}", range.to_regex());

Implementors