RegEx to match some wrapped texts

Question

Consider following text:

aas(  I)f df (as)(dfdsf)(adf).dgdf(sfg).(dfdf) asdfsdf dsfa(asd #54 54 !fa.) sdf

I want to retrive text between parenthesis, but adjacent parentheses should be consider a single unit. How can I do that?

For above example desired output is:

( I)
(as)(dfdsf)(adf)
(sfg).(dfdf)
(asd #54 54 !fa.)

`(sfg).(dfdf)` is considered adjacent, even with the `.` between? — Wiseguy, Mar 15 '13 at 14:02
@Wiseguy Yes, It is considered. Just alphabet and numbers disjoint parenthesis — Handsome Nerd, Mar 15 '13 at 14:06
There is space in the first token `( I)`. You sure it is valid? — nhahtdh, Mar 15 '13 at 14:22

collapsar · Answer 1 · 2013-03-15T15:00:24.867

1

try [^(](\([^()]+([)](^[[:alnum:]]*)?[(][^()]+)*\))[^)]. capture group 1 is what you want.

this expression assumes that every kind of character apart from parentheses mayy occur in the text between parentheses and it won't match portions with nested parentheses.

edited Mar 15 '13 at 15:00

answered Mar 15 '13 at 14:03

collapsar

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Andy E · Answer 2 · 2013-03-15T14:08:34.037

1

I'd go with: /(?:\(\w+\)(?:\.(?=\())?)+/g

\(\w+\) to match a-zA-Z0-9_ inside literal braces
(?:\.(?=\())? to capture a literal . only if it's followed by another opening brace
The whole thing wrapped in (?:)+ to join adjacent captures together

var str = "aas(I)f df (asdfdsf)(adf).dgdf(sfg).(dfdf) asdfsdf dsfa(asdfa) sdf";
str.match(/(?:\(\w+\)(?:\.(?=\())?)+/g);
// -> ["(I)", "(asdfdsf)(adf)", "(sfg).(dfdf)", "(asdfa)"]

edited Mar 15 '13 at 14:08

answered Mar 15 '13 at 14:03

Andy E

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Just noticed that your question was for [tag:php]. Shows how much attention I paid, but the regex will still work! – Andy E Mar 15 '13 at 14:17

score 1 · Accepted Answer · answered Mar 15 '13 at 14:48

Assumption

No nesting (), and no escaping of ()
Parentheses are chained together with the . character, or by being right next to each other (no flexible spacing allowed).
(a)(b).(c) is consider a single token (the . is optional).

Solution

The regex below is to be used with global matching (match all) function.

\([^)]*\)(?:\.?\([^)]*\))*

Please add the delimiter on your own.

DEMO

Explanation

Break down of the regex (spacing is insignificant). After and including # are comments and not part of the regex.

\(             # Literal (
[^)]*          # Match 0 or more characters that are not )
\)             # Literal ). These first 3 lines match an instance of wrapped text
(?:            # Non-capturing group
  \.?          # Optional literal .
  \([^)]*\)    # Match another instance of wrapped text
)*             # The whole group is repeated 0 or more times

Thanks a lot, I used `\([^)]*\)(?:[^\pL]*?\([^)]*\))*` – Handsome Nerd Mar 22 '13 at 13:06 — Handsome Nerd, Mar 22 '13 at 13:06

score -2 · Answer 4 · answered Mar 15 '13 at 14:01

-2

This one should do the trick:

\([A-Za-z0-9]+\)

answered Mar 15 '13 at 14:01

Borniet

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1

it won't as it doesn't take into account adjacency of text in parentheses. – collapsar Mar 15 '13 at 14:04

RegEx to match some wrapped texts

4 Answers4

Assumption

Solution

Explanation