RegEx - 避免匹配以特定字符结尾的单词

Question

I am trying to create a regex (regexp) that will avoid matching words ending with '@', '-', ',': ':' and '>'

The rules are as follows - the name should begin with @ can have any character after it except the ones above. So in the following strings: 'zhsvfghzfajhuib@Bobbie?skvshvfhj?G,' - @Bobbie, will match '768huehfvwkjv@Lana97958749ndgjhb.G!' - @Lana9 will match ',vbfnhytjnh@Sammie-sjvjhsvfjj!G!kjdbdjb' - @Sammie- will NOT match, because the character after the name is in the above range.

My latest attempt is: @(?[A-Za-z]+)[^@-:.>] but all it did was to remove the last character and still matched.

I tried:

• adding another character in the search @(?[A-Za-z]+).[^@-:.>] but the search just moved to the next character.
• adding a word boundary @(?[A-Za-z]+)\b[^@-::>] which help in some cases but not all

Answer 1

If supported, you can use an atomic group :

@(?>(?<name>[A-Za-z]+))[^@\-!:>]

Regex demo

Another option is using a positive lookahead with a capture group and a backreference as there is no backtracking in lookarounds :

@(?=([A-Za-z]+))\1[^@\-!:>]

Regex demo