"It was a lot of trial and error."
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.
，这一点在搜狗输入法下载中也有详细论述
Somehow still on the fence? Here's a snapshot of what you can expect from these special events:
一路上，几个乘客基本无话，后排我们三个挤得紧紧的，胳膊肘都没法舒展，只能尽量保持不动，生怕不小心蹭到身边人。车主倒是侃侃而谈，说她非专业跑顺风车的，顺路拉几个人只是为了凑个油费。好在快到我们县城的时候，有一位乘客先下车，后排空间才宽松起来。因为是顺风车，需要逐一送每位乘客，而我是最后一位，所以我到家的时间已经是下午4点左右了。粗略算了下路上的时间，坐顺风车与坐火车再倒客车的时间相差无几，只是体验反而更差了些。