utils

export declare const Char: t.BrandC<t.StringC, CharBrand>

export type Char = t.Branded<string, CharBrand>

export interface CharBrand {
  readonly Char: unique symbol
}

export declare const charDecoder: <S extends string>() => D.Decoder<S, t.Branded<S, t.Branded<string, CharBrand>>>

export declare const isChar: (s: string) => boolean