Frege 中的正则表达式文字
Regex literal in Frege
用于在 Frege 中指定正则表达式文字的重音符号的 unicode 代码是什么？
该字符称为 Acute Accent，其 unicode 为 00B4。在 ubuntu 中，您可以使用 Ctrl+Shift+u 键入，然后键入00B4 然后 space。但是，如果您的正则表达式文字超过一个字符，您实际上不必使用它，在这种情况下，您可以只使用撇号。
引用 doc:
Regular expression literals have type Regex and are written:
´\b(foo|bar)\b´ -- string enclosed in grave accents
'\w+' -- string with length > 1 enclosed in apostrophes
The notation with the apostrophes has been introduced because many have a hard time entering a grave accent mark on their terminal. However, it is not possible to write a regular expressions with length 1 this way, because then the literal gets interpreted as Char literal. (One can write something like '(?:X)' for a Regex that matches a single 'X').
用于在 Frege 中指定正则表达式文字的重音符号的 unicode 代码是什么？
该字符称为 Acute Accent，其 unicode 为 00B4。在 ubuntu 中，您可以使用 Ctrl+Shift+u 键入，然后键入00B4 然后 space。但是，如果您的正则表达式文字超过一个字符，您实际上不必使用它，在这种情况下，您可以只使用撇号。
引用 doc:
Regular expression literals have type Regex and are written:
´\b(foo|bar)\b´ -- string enclosed in grave accents
'\w+' -- string with length > 1 enclosed in apostrophes
The notation with the apostrophes has been introduced because many have a hard time entering a grave accent mark on their terminal. However, it is not possible to write a regular expressions with length 1 this way, because then the literal gets interpreted as Char literal. (One can write something like '(?:X)' for a Regex that matches a single 'X').