Text.Tokenizer.BlackWhiteSet

Contents

Description

This module contains auxillary set structure to store effectively small sets of symbols and complementary to them

Synopsis

Documentation

Select some "white set" of available elements or "black set" of forbidden ones

Constructors

BlackSet (Set c)
WhiteSet (Set c)

Instances details

Eq c => Eq (BlackWhiteSet c) Source #
Instance details Defined in Text.Tokenizer.BlackWhiteSet Methods (==) :: BlackWhiteSet c -> BlackWhiteSet c -> Bool # (/=) :: BlackWhiteSet c -> BlackWhiteSet c -> Bool #
Ord c => Ord (BlackWhiteSet c) Source #
Instance details Defined in Text.Tokenizer.BlackWhiteSet Methods compare :: BlackWhiteSet c -> BlackWhiteSet c -> Ordering # (<) :: BlackWhiteSet c -> BlackWhiteSet c -> Bool # (<=) :: BlackWhiteSet c -> BlackWhiteSet c -> Bool # (>) :: BlackWhiteSet c -> BlackWhiteSet c -> Bool # (>=) :: BlackWhiteSet c -> BlackWhiteSet c -> Bool # max :: BlackWhiteSet c -> BlackWhiteSet c -> BlackWhiteSet c # min :: BlackWhiteSet c -> BlackWhiteSet c -> BlackWhiteSet c #
Show c => Show (BlackWhiteSet c) Source #
Instance details Defined in Text.Tokenizer.BlackWhiteSet Methods showsPrec :: Int -> BlackWhiteSet c -> ShowS # show :: BlackWhiteSet c -> String # showList :: [BlackWhiteSet c] -> ShowS #

Some simple utilities to work with BlackWhiteSet

Make a BlackWhiteSet containing only one symbol

Intersect two BlackWhiteSets.

Check if BlackWhiteSet is empty

NB! number of all elements assumed to be too large, so BlackSet is never supposed to be empty

Check if symbol is a member of a BlackWhiteSet

>>> member 'a' (WhiteSet (S.fromList ['a', 'b']))
True

>>> member 'a' (BlackSet (S.fromList ['a', 'b']))
False