正则表达式将测试Go中的拉丁字母

Question

I'm trying to write a regex in Go to test for Latin letters only.

I know that \p{Latin} matches with any Latin script characters, but it also matches things such as Roman Numerals (e.g. "ⅻ"). That leads me to \p{L} which matches Unicode letters, but it matches any script, not just Latin.

Best I've been able to come with so far is two regexes with an &&:

latinRe := regexp.MustCompile(`\p{Latin}`)
letterRe := regexp.MustCompile(`\p{L}`)
if latinRe.Matches(testString) && letterRe.Matches(testString) {...}

I'm not happy that I can't test this as easily using something like regex101.com. Is there a better way? More succinct? Performant?

Answer 1

You can use a range like the following to specify all the characters you want to match. Depending on the regex engine, one of the following should work:

See regex in use here: Adapted from this link

[A-Za-z\u00C0-\u00D6\u00D8-\u00f6\u00f8-\u00ff]
[A-Za-z\xC0-\xD6\xD8-\xf6\xf8-\xff]

Another option is to negate specific characters from a Unicode character class:

See regex in use here

[^\P{Latin}\p{N}]