var onetime$1 = {exports: {}};

var mimicFn$2 = {exports: {}};

const mimicFn$1 = (to, from) => {
	for (const prop of Reflect.ownKeys(from)) {
		Object.defineProperty(to, prop, Object.getOwnPropertyDescriptor(from, prop));
	}

	return to;
};

mimicFn$2.exports = mimicFn$1;
// TODO: Remove this for the next major release
mimicFn$2.exports.default = mimicFn$1;

const mimicFn = mimicFn$2.exports;

const calledFunctions = new WeakMap();

const onetime = (function_, options = {}) => {
	if (typeof function_ !== 'function') {
		throw new TypeError('Expected a function');
	}

	let returnValue;
	let callCount = 0;
	const functionName = function_.displayName || function_.name || '<anonymous>';

	const onetime = function (...arguments_) {
		calledFunctions.set(onetime, ++callCount);

		if (callCount === 1) {
			returnValue = function_.apply(this, arguments_);
			function_ = null;
		} else if (options.throw === true) {
			throw new Error(`Function \`${functionName}\` can only be called once`);
		}

		return returnValue;
	};

	mimicFn(onetime, function_);
	calledFunctions.set(onetime, callCount);

	return onetime;
};

onetime$1.exports = onetime;
// TODO: Remove this for the next major release
onetime$1.exports.default = onetime;

onetime$1.exports.callCount = function_ => {
	if (!calledFunctions.has(function_)) {
		throw new Error(`The given function \`${function_.name}\` is not wrapped by the \`onetime\` package`);
	}

	return calledFunctions.get(function_);
};

export { onetime$1 as o };