/**
 * Return `expr` parenthesized if it is not a simple identifier or numeric literal.
 * @param expr Expression to be parenthesized.
 */
export declare function par(expr: string | number): string;
/**
 * Return the string that represents TypeScript binary expression code.
 * `lhs` (left hand side) and `rhs` (right hand side) get parenthesized if neccessary.
 *
 * @param lhs Left hand side of the expression
 * @param op Binary operator
 * @param rhs Right hand side of the expression
 */
export declare function binary(lhs: string | number, op: string, rhs: string | number): string;
/**
 * Shortahnd for enclosing `str` with backticks.
 * @param str String to ecnlose with backticks.
 */
export declare function bt(str: string): string;
export declare function maybePlural(count: number): "" | "s";
/**
 * Shrinks multiple subsequent whitespace characters to one single whitespace char,
 * adds leading whitespace to string if it is not empty.
 * Returns empty string if `str` contains nothing but whitespace characters.
 * @param str String to shrink whitespaces in.
 */
export declare function shrinkWs(str?: string): string;
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