Interface CharacterStreamInterface

interface CharacterStreamInterface {
    backUp: (num: number) => void;
    column: () => number;
    current: () => string;
    eat: (pattern: TokenPattern) => string | undefined;
    eatSpace: () => boolean;
    eatWhile: (match: TokenPattern) => boolean;
    eol: () => boolean;
    getCurrentPosition: () => number;
    getStartOfToken: () => number;
    indentation: () => number;
    match: (
        pattern: TokenPattern,
        consume?: Maybe<boolean>,
        caseFold?: Maybe<boolean>,
    ) => boolean | string[];
    next: () => string;
    peek: () => string | null;
    skipTo: (position: number) => void;
    skipToEnd: () => void;
    sol: () => boolean;
}