import { StringRuleChecker } from './string-rule-checker';
import { CapitalizationStyle } from './string-types';
import { GuardResult } from '../../core/guard-result';
export declare class StringIsCapitalized extends StringRuleChecker<{
    type: 'isCapitalized';
    style: CapitalizationStyle;
    checkFirstCharIsLetter?: boolean;
}> {
    constructor(rule: {
        type: 'isCapitalized';
        style: CapitalizationStyle;
        checkFirstCharIsLetter?: boolean;
    }, value: string);
    /**
     * @override
     */
    exec(): GuardResult;
    /**
     * Checks if first encountered character is capitalized, even if it's not letter.
     * @param value
     * @returns
     */
    private checkFirstChar;
    /**
     * Checks if first encountered character is mandatorily a capitalized letter.
     * @param value
     * @returns
     */
    private checkFirstCharIsLetter;
    /**
     * Checks if string follows start case capitalization, in a strict or permissive style.
     * @param value
     * @returns
     */
    private checkStartCase;
}