export interface SegmentSpec {
    key: string;
    len: number;
    min: number;
    max: number;
    placeholder: string;
    kind?: 'num' | 'meridiem';
}
export type SegmentValues = Record<string, number | null>;
export interface SegmentedFieldConfig {
    /** Ordered sections + separator strings; re-read on every focus so mode /
     *  withTime changes rebuild the field. */
    schema: () => Array<SegmentSpec | string>;
    /** Parse the controller's ASCII value into per-key section values. */
    seed: (ascii: string) => SegmentValues;
    /** Build the controller's ASCII value from a complete set of section values. */
    toAscii: (values: SegmentValues) => string;
    /** Placeholder shown when the field is empty and unfocused. */
    placeholder: () => string;
    /** Locale display string shown when the field is not being edited. */
    formatted: () => string;
    /** ASCII of the committed value, or '' if none — seeds sections on focus. */
    committed: () => string;
    /** ASCII of the value or today — seeds a section on first arrow step. */
    reference: () => string;
    validate: (ascii: string) => 'valid' | 'invalid' | 'empty';
    commit: (ascii: string) => 'valid' | 'invalid' | 'empty';
    open: () => void;
    close: () => void;
}
export interface SegmentedField {
    isEditing: () => boolean;
    destroy: () => void;
}
export declare function attachSegmentedField(input: HTMLInputElement, cfg: SegmentedFieldConfig): SegmentedField;