修改下一个字母的 Unicode 字符？

Question

许多 unicode 字符会修改前一个字符的外观。有没有一个修改以下字符？

Answer 1

不可以，unicode 仅支持主要字符后面的修饰符。来自 definition D52 in Section 3.6, Combination of the 6.0.0 specification :

• The graphic positioning of a combining character depends on the last preceding base character, unless they are separated by a character that is neither a combining character nor either zero width joiner or zero width nonjoiner. The combining character is said to apply to that base character.
• There may be no such base character, such as when a combining character is at the start of text or follows a control or format character—for example, a carriage return, tab, or right-left mark. In such cases, the combining characters are called isolated combining characters.