function compile(src) {
	var cached;

	if (typeof src !== "string") {
		throw new TypeError(
			"src must be a string, instead saw '" + typeof src + "'"
		);
	}

	if (!compile.cache) {
		return parser.parse(src);
	}

	cached = compile.cache[src];
	if (!cached) {
		cached = compile.cache[src] = parser.parse(src);
	}

	return cached;
}
The software constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.