/**
 * Parses an integer. Throws an error if the string given is not an integer (it
 * contains decimals, text, or illegal symbols).
 * @param value The string with the integer.
 */
export declare function parseIntThrow(value: string): number;
/**
 * Parses an integer. Returns null if the string given is not an integer (it
 * contains decimals, text, or illegal symbols).
 * @param value The string with the integer.
 */
export declare function parseIntNull(value: string): number | null;
/**
 * Parses an integer. Throws an error if the string given is not an integer (it
 * contains decimals, text, or illegal symbols).
 * @param value The string with the integer.
 */
export declare function parseFloatThrow(value: string): number;
/**
 * Parses an integer. Returns null if the string given is not an integer (it
 * contains decimals, text, or illegal symbols).
 * @param value The string with the integer.
 */
export declare function parseFloatNull(value: string): number | null;
/** Represents a range of values, with a minimum and maximum. */
export declare class NumberRange {
    /** The minimum value. */
    readonly min: number;
    /** The maximum value. */
    readonly max: number;
    /** Creates a {@link NumberRange}. */
    constructor(
    /** The minimum value. */
    min: number, 
    /** The maximum value. */
    max: number);
    /**
     * Parses a string like "4" or "2..5.5" to a number range. Returns null on
     * failure.
     * @param input A string, e.g. "4" or "2..5.5".
     */
    static parse(input: string): NumberRange | null;
    /** E.g. "4" or "2..5.5". */
    asString(): string;
}