regex101: PCRE (Legacy) Match Workspace

1st Alternative "[^"\\]*(?s:\\.[^"\\]*)*+" (*SKIP)(*F)

"the literal text "

Negated Character Class[^"\\]*

*matches any number of characters outside the set below:

"the literal " (34₁₀ / 42₈ / 22₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

Group with flags gxs(?s:\\.[^"\\]*)*+

*+repeats the group contents below any number of times:

s modifier: single line. Allows a dot to match line terminators

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

.any character

Negated Character Class[^"\\]*

*matches any number of characters outside the set below:

"the literal " (34₁₀ / 42₈ / 22₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

" the literal text "

(*SKIP)acts like (*PRUNE), but the next unanchored match attempt starts where (*SKIP) was reached instead of at the next subject character

(*F)forces the current match attempt to fail at this position

2nd Alternative / (?: / .* | \* [^*]* (?: \*+(?!/) [^*]* )*+ (?:\*/)? )

/ the literal text /

Non-Capturing Group(?: / .* | \* [^*]* (?: \*+(?!/) [^*]* )*+ (?:\*/)? )

1st Alternative / .*

/ the literal text /

.*any character (except for line terminators), repeated any number of times

2nd Alternative \* [^*]* (?: \*+(?!/) [^*]* )*+ (?:\*/)?

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

Negated Character Class[^*]*

*matches any number of characters outside the set below:

*the literal * (42₁₀ / 52₈ / 2A₁₆)

Non-Capturing Group(?: \*+(?!/) [^*]* )*+

*+repeats the group contents below any number of times:

\*+the literal * (42₁₀ / 52₈ / 2A₁₆) , repeated at least once

Negative Lookahead(?!/)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Negated Character Class[^*]*

*matches any number of characters outside the set below:

*the literal * (42₁₀ / 52₈ / 2A₁₆)

Non-Capturing Group(?:\*/)?

?repeats the group contents below at most once:

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Global pattern flags

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

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

25 tokens

Regular Expression

  "[^"\\]*(?s:\\.[^"\\]*)*+"
  (*SKIP)(*F)
|
  /
  (?:
      / .*
    |
      \* [^*]* (?: \*+(?!/) [^*]* )*+ (?:\*/)?
  )

New

/* toto****to ****/ /****/ 
char * foo = "//don't\" // remove" " // really please don't"; // But remove this ha ha! // along with this!

char *bad_regex_strategy = "\"good luck\" // \"counting the \"quotes\"" "//\"//"; // \"ha""" \" " \" ha ha\" ha /// "\;"ha'
/*
and then imagine a copy of that entire line commented out on the next line of source.
I'd question the entire task and see if there isn't a C source manipulation library you should be using instead. ?
 BaseZen 2 hours ago Is it? So when I have the choise between doing this by regex or final state machine, u recommend the FSM, right?
 :/ ? user3457394 2 hours ago

Extraction

/* toto****to ****/ /****/ 
char * foo = "//don't\" // remove" " // really please don't"; // But remove this ha ha! // along with this!

char *bad_regex_strategy = "\"good luck\" // \"counting the \"quotes\"" "//\"//"; // \"ha""" \" " \" ha ha\" ha /// "\;"ha'
/*
and then imagine a copy of that entire line commented out on the next line of source.
I'd question the entire task and see if there isn't a C source manipulation library you should be using instead. ?
 BaseZen 2 hours ago Is it? So when I have the choise between doing this by regex or final state machine, u recommend the FSM, right?
 :/ ? user3457394 2 hours ago