Regex: Match a pattern within quoted texts

Question

Text is

lemma A:
"
 abx K() bc
"

// comment lemma B
lemma B:
"
 abx bc sdsf
"


lemma C:
"
 abfdfx K() bc
"


lemma D:
"
 abxsf bc
"

I want to find the lemmas which contain K() inside its following quoted text. I have tried Perl regex (?s)^[ ]*lemma.*?"(?!").*?K\( but it overlaps two lemmas. The output should be: lemma A: "..." and lemma C: "...".

Answer 1

If the double quotes are at the start of the string, you can match a newline and then the double quote.

Then match any char except the double quote until you match K(

^[ ]*lemma\b.*\R"[^"]*K\(

• ^ Start of string
• [ ]*lemma\b Match optional spaces and lemma
• .*\R Match the rest of the line and a newline
• "[^"]* Match " followed by optional chars other than "
• K\( Match K(

Regex demo

Answer 2

You could use:

(?s)^[ ]*lemma[^"]*"[^"]*?K\(

[^"] means "any character but ""

See a demo here