/**
 * Shorthand static class for special string functions.
 */
export declare class LazyText {
    static letters: string[];
    static digits: string[];
    static variables: string[];
    static controls: string[];
    static whitespaces: string[];
    static symbols: string[];
    static punctuations: string[];
    /**
     * A shorthand function to extract a certain number of character from a string.
     * @param {string} content The string where we want to extract content from.
     * @param {number} index The index from which we start.
     * @param {number} nbrLetters The number of letters to extract.
     * @returns {string} Return a string of nbrLetters characters if there is that many from a starting point.
     */
    static extract(content: string, index: number, nbrLetters: number): string;
    /**
     * Extract the content from a string starting at a specific index until the predicate is false.
     * @param {string} content The source string from which we get the content to extract.
     * @param {number} startIndex The starting index.
     * @param {(c: string, i: number, txt: string)=>boolean} predicate A function to check if we include the character.
     * @returns {{lastIndex: number, value:string}} An object containing the substring made by following the predicate rule and the last index extracted.
     */
    static extractFromUntil(content: string, startIndex: number, predicate: (c: string, i: number, txt: string) => boolean): {
        value: string;
        lastIndex: number;
    };
    /**
     * Return the number of lines contained inside a string.
     * @param {string} content The string content from which we want to count the lines.
     * @returns {number} The number of lines contained in the string.
     */
    static countLines(content: string): number;
    /**
     * Find the number of lines from the start of a string until a specified index, finding the character position of that element on the way.
     * @param {string} content The string we're going to look.
     * @param {number} maxIndex The last index we're going to look.
     * @returns {{lines: number; lineChar: number;}} An object containing the number of lines found and the character position of the last index in it's current line.
     */
    static countLinesChar(content: string, maxIndex?: number): {
        lines: number;
        lineChar: number;
    };
}
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