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GHC 10.0.0.20260917 · lts/ghc-10.0.x · 8fef28d · 2026-11-02

Moduleunicode-data-0.9.0Haskell2010

Unicode.Char.Numeric.Compat

Compatibility module for numeric character property related functions.

Contents
  1. Predicates
Synopsis

Predicates

valueisNumber :: Char -> Bool

Selects Unicode numeric characters, including digits from various scripts, Roman numerals, et cetera.

This function returns True if its argument has one of the following GeneralCategorys, or False otherwise:

Note: a character may have a numeric value (see numericValue) but return False, because isNumber only tests GeneralCategory: some CJK characters are OtherLetter and do have a numeric value. Use isNumeric to cover those cases as well.

Property
isNumber c == Data.Char.isNumber c

@since 0.3.1 moved to Compat module.