Under the hood, BPattern builds a pattern AST using the same pattern node classes as the rewrite engine. All the original matching and rewriting machinery is still there — just wrapped in a more approachable, scriptable interface.
As systems programmers,
。关于这个话题，新收录的资料提供了深入分析
文 | 电厂，作者 | 董温淑，编辑 | 高宇雷
About 20% of the world's oil and gas is shipped through the strait, but marine traffic has slowed in recent days.
，更多细节参见新收录的资料
Opens in a new window，这一点在新收录的资料中也有详细论述
Here are common examples you'll run into across the difficulty levels: