How to write regex express string literal in scala

Question

String litertal consist zero or more character enclosed by double quote("). Use escape sequences(listed below) to represent special characters within a string. It is a compile-time error for a newline or EOF characterto appear inside a string literal. All the supported escape sequences are as follow:

• \\b backspace
• \\f formfeed
• \\r carriage return
• \\n newline

• \\t tab

• \\" double quote

• \\ backslash

The following are valid examples of string literal:

• " This is a string contain tab \\t"
• " Hello stackoverflow \\"\\b"

Can you help me write a regex match string literal? Thanks so much.

Answer 1

The most general way is to use Pattern.quote() method which returns a regular expression that matches the literal string passed as its argument. You can use it in Scala as well as in Java.

Answer 2

如果要匹配例如由文字"contain tab \\t"表示的字符串，则可以使用正则表达式"contain tab \\t".r .r-因此，在正则表达式中不需要对TAB进行任何特殊处理。