What is the use of “~” mark in the Perl regular expression?

Question

I'm using boost library for regular expression in C++. What is the use of ~ mark in the Perl regular expression?

What does it denote? eg

~myName 

or

ab~dc

Answer 1

这是一个正常字符，逐字匹配，没有特殊含义。

Answer 2

AFAIK〜在perl正则表达式中没有特殊作用，因此〜myName实际上是“〜myName”。