The rewrite engine is an absolutely brilliant invention by John Brant and Don Roberts, introduced with the Refactoring Browser (see “A Refactoring Tool for Smalltalk”, 1997). It gives us AST-level matching and rewriting with astonishing power.
Two characters might have identical Unicode skeletons but render differently in specific fonts, or have different skeletons but render identically in a particular typeface. Detecting this requires rendering glyphs and comparing pixel output. No purely Unicode-data-based approach handles it, and UTS #39 does not attempt to.
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安迪笑稱，他最直接的感受就是，2019年他回國的時候，他曾嘗試把「蛋炒飯」推廣給朋友去吃，當時大家興致缺缺，只是覺得獵奇。而最近，他靠蛋炒飯技術一舉成為朋友中的核心角色。「社交地位都顯著高了」。