/**
 * A tool for [converting][convert] a sorted series of code-point offsets in a [text]
 * to JavaScript string character offsets.
 */
declare class Cp2JSOffsetConverter {
    private lastCharOffset;
    private lastCodepointOffset;
    private textArray;
    constructor(text: string);
    /**
     * Converts a codepoint offset in [text] to a JS-char-based-offset.
     *
     * @param codepointOffset The offset in code points.
     * @throws RangeError if the [codepointOffset] is out of bounds of [text],
     * or when its value in this call is smaller than in the previous call.
     */
    convert(codepointOffset: number): number;
}
/**
 * A tool for [converting][convert] a sorted series of JavaScript string character offsets
 * in a [text] to code-point offsets.
 */
declare class JS2CpOffsetConverter {
    text: string;
    private lastCodepointOffset;
    private lastCharOffset;
    constructor(text: string);
    /**
     * Converts a JavaScript string char-based offset in [text] to a codepoint offset.
     *
     * @param charOffset The offset in JavaScript string characters.
     * @throws RangeError if the [charOffset] is out of bounds of [text],
     * or when its value in this call is smaller than in the previous call.
     */
    convert(charOffset: number): number;
}
export { Cp2JSOffsetConverter, JS2CpOffsetConverter };