regex101: PCRE (Legacy) Match Workspace

Pro

Non-Capturing Group(?:(?:(?:[2-9]|[1-2]\d|[3][0-5])\^\^(?:\w*\.\w+|\w+(?:\.(?!\.))\w*|\w+))|(?:\d*\.\d+|\d+(?:\.(?!\.))\d*|\d+))

1st Alternative(?:(?:[2-9]|[1-2]\d|[3][0-5])\^\^(?:\w*\.\w+|\w+(?:\.(?!\.))\w*|\w+))

Non-Capturing Group(?:(?:[2-9]|[1-2]\d|[3][0-5])\^\^(?:\w*\.\w+|\w+(?:\.(?!\.))\w*|\w+))

Non-Capturing Group(?:[2-9]|[1-2]\d|[3][0-5])

1st Alternative[2-9]

Character Class[2-9]

2-9one character from 2 (50₁₀) to 9 (57₁₀)

2nd Alternative[1-2]\d

Character Class[1-2]

1-2one character from 1 (49₁₀) to 2 (50₁₀)

\da digit

3rd Alternative[3][0-5]

Character Class[3]

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

Character Class[0-5]

0-5one character from 0 (48₁₀) to 5 (53₁₀)

\^the literal ^ (94₁₀ / 136₈ / 5E₁₆)

Non-Capturing Group(?:\w*\.\w+|\w+(?:\.(?!\.))\w*|\w+)

1st Alternative\w*\.\w+

\w*any word character, repeated any number of times

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\w+any word character, repeated at least once

2nd Alternative\w+(?:\.(?!\.))\w*

\w+any word character, repeated at least once

Non-Capturing Group(?:\.(?!\.))

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negative Lookahead(?!\.)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\w*any word character, repeated any number of times

3rd Alternative\w+

\w+any word character, repeated at least once

2nd Alternative(?:\d*\.\d+|\d+(?:\.(?!\.))\d*|\d+)

Non-Capturing Group(?:\d*\.\d+|\d+(?:\.(?!\.))\d*|\d+)

1st Alternative\d*\.\d+

\d*a digit, repeated any number of times

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

2nd Alternative\d+(?:\.(?!\.))\d*

\d+a digit, repeated at least once

Non-Capturing Group(?:\.(?!\.))

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negative Lookahead(?!\.)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d*a digit, repeated any number of times

3rd Alternative\d+

\d+a digit, repeated at least once

Non-Capturing Group(?:(?:``(?:\+|-)?(?:\d*\.\d+|\d+\.\d*|\d+))|(?:`(?:(?:\+|-)?(?:\d*\.\d+|\d+\.\d*|\d+))?))?

?repeats the group contents below at most once:

1st Alternative(?:``(?:\+|-)?(?:\d*\.\d+|\d+\.\d*|\d+))

2nd Alternative(?:`(?:(?:\+|-)?(?:\d*\.\d+|\d+\.\d*|\d+))?)

Non-Capturing Group(?:\*\^(?:\+|-)?\d+)?

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

25 tokens

Regular Expression

(?:(?:(?:[2-9]|[1-2]\d|[3][0-5])\^\^(?:\w*\.\w+|\w+(?:\.(?!\.))\w*|\w+))|(?:\d*\.\d+|\d+(?:\.(?!\.))\d*|\d+))(?:(?:``(?:\+|-)?(?:\d*\.\d+|\d+\.\d*|\d+))|(?:`(?:(?:\+|-)?(?:\d*\.\d+|\d+\.\d*|\d+))?))?(?:\*\^(?:\+|-)?\d+)?

New

// Correct Numbers
2^^101.101
35^^WolframLanguage
16^^dead.Beef
123`
1.381`
16^^9fe.c3`7
3.0`+7
3`7
3.000000000000000000000`7
3.000000000000000000`-7
3.98`5*^3
16^^dead.beef``+4*^-3
0.0000000001*^10
35^^small*^-10
10000000000*^-10

// Non-examples
1..
123...
35^^WolframLanguage
16^^dead..Beef
16^^9fe..c3`7

Substitution

// Correct Numbers
2^^101.101
35^^WolframLanguage
16^^dead.Beef
123`
1.381`
16^^9fe.c3`7
3.0`+7
3`7
3.000000000000000000000`7
3.000000000000000000`-7
3.98`5*^3
16^^dead.beef``+4*^-3
0.0000000001*^10
35^^small*^-10
10000000000*^-10

// Non-examples
1..
123...
35^^WolframLanguage
16^^dead..Beef
16^^9fe..c3`7