/**
 * A branded type representing a string that is guaranteed to be non-empty (length > 0).
 * This type allows distinguishing non-empty strings from regular strings at compile time.
 */
export type NonEmptyString = string & {
    readonly __brand: unique symbol;
};
/**
 * Checks if a value is a non-empty string.
 * @param value - The value to check
 * @returns True if the value is a string with length > 0, false otherwise
 */
export declare const isNonEmptyString: (value: string | null | undefined) => value is NonEmptyString;
/**
 * Converts a string to NonEmptyString type.
 * @param value - The string to convert
 * @returns The string as NonEmptyString type
 * @throws Error if the value is null, undefined, or empty string
 */
export declare const toNonEmptyString: (value: string) => NonEmptyString;
/**
 * Converts a string to NonEmptyString type or returns undefined.
 * @param value - The string to convert
 * @returns The string as NonEmptyString type, or undefined if the value is null, undefined, or empty
 */
export declare const toNonEmptyStringOrUndefined: (value: string | null | undefined) => NonEmptyString | undefined;
/**
 * A branded type representing a string that is guaranteed to be non-blank.
 * A non-blank string contains at least one non-whitespace character.
 * This type allows distinguishing non-blank strings from regular strings at compile time.
 */
export type NonBlankString = string & {
    readonly __brand: unique symbol;
};
/**
 * Checks if a value is a non-blank string.
 * A non-blank string is a string that contains at least one non-whitespace character.
 * @param value - The value to check
 * @returns True if the value is a string with trimmed length > 0, false otherwise
 */
export declare const isNonBlankString: (value: string | null | undefined) => value is NonBlankString;
/**
 * Converts a string to NonBlankString type.
 * @param value - The string to convert
 * @returns The string as NonBlankString type
 * @throws Error if the value is null, undefined, empty string, or contains only whitespace characters
 */
export declare const toNonBlankString: (value: string) => NonBlankString;
/**
 * Converts a string to NonBlankString type or returns undefined.
 * @param value - The string to convert
 * @returns The string as NonBlankString type, or undefined if the value is null, undefined, empty, or contains only whitespace characters
 */
export declare const toNonBlankStringOrUndefined: (value: string | null | undefined) => NonBlankString | undefined;