@tannin/plural-forms/index.js

Compiles a function to compute the plural forms index for a given value

import compile from '@tannin/compile';

/**
 * Given a C expression, returns a function which, when called with a value,
 * evaluates the result with the value assumed to be the "n" variable of the
 * expression. The result will be coerced to its numeric equivalent.
 *
 * @param {string} expression C expression.
 *
 * @return {Function} Evaluator function.
 */
export default function pluralForms( expression ) {
	var evaluate = compile( expression );

	return function( n ) {
		return +evaluate( { n: n } );
	};
}