Method addRule

packages/utils/renderer/highlight.js:530–538

(e, n)

								(this.position = 0);
						}
						addRule(e, n) {
							(n.position = this.position++),
								(this.matchIndexes[this.matchAt] = n),
								this.regexes.push([n, e]),
								(this.matchAt +=
									(function (e) {
										return RegExp(e.toString() + '|').exec('').length - 1;
									})(e) + 1);
						}
						compile() {
							0 === this.regexes.length && (this.exec = () => null);
							const e = this.regexes.map((e) => e[1]);