/**
 * Casing helpers shared by the name-based detectors (month, weekday).
 *
 * Detectors capture the casing of the source text so extrapolated names match
 * the user's style (`JAN → FEB`, `jan → feb`, `Jan → Feb`).
 *
 * @packageDocumentation
 */
/** The three casing styles a name-based detector preserves. */
export declare enum TextCasing {
    /** First letter upper, rest lower (`January`). */
    Title = "title",
    /** All upper (`JANUARY`). */
    Upper = "upper",
    /** All lower (`january`). */
    Lower = "lower"
}
/**
 * Infers the casing style of a word.
 *
 * @param word - A non-empty word.
 * @returns The detected {@link TextCasing} (defaults to {@link TextCasing.Title}).
 */
export declare function detectCasing(word: string): TextCasing;
/**
 * Applies a casing style to a canonical (Title-cased) name.
 *
 * @param name   - The canonical name (as produced by `Intl`).
 * @param casing - The target casing.
 * @returns The re-cased name.
 */
export declare function applyCasing(name: string, casing: TextCasing): string;
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