Regular Expressions 101

Explanation

Pro

Non-Capturing Group(?:((?(3)\s*|\R*)->\s*([\w.]*(\((?>'[^'\\]*(?:\\.[^'\\]*)*'|"[^"\\]*(?:\\.[^"\\]*)*"|[^"'()]++|(?3))*\)))))+

+repeats the group contents below at least once:

Group 1((?(3)\s*|\R*)->\s*([\w.]*(\((?>'[^'\\]*(?:\\.[^'\\]*)*'|"[^"\\]*(?:\\.[^"\\]*)*"|[^"'()]++|(?3))*\))))

Condition(?(3)\s*|\R*)

Uses the first branch if group 3 matched

If the condition is true, match this branch:\s*

\s*any whitespace character, repeated any number of times

Otherwise, match this branch:\R*

\R*a newline sequence, repeated any number of times

->the literal text ->

\s*any whitespace character, repeated any number of times

Group 2([\w.]*(\((?>'[^'\\]*(?:\\.[^'\\]*)*'|"[^"\\]*(?:\\.[^"\\]*)*"|[^"'()]++|(?3))*\)))

Character Class[\w.]*

*matches any number of characters from the set below:

\wany word character

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 3(\((?>'[^'\\]*(?:\\.[^'\\]*)*'|"[^"\\]*(?:\\.[^"\\]*)*"|[^"'()]++|(?3))*\))

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Atomic Group(?>'[^'\\]*(?:\\.[^'\\]*)*'|"[^"\\]*(?:\\.[^"\\]*)*"|[^"'()]++|(?3))*

*repeats the group contents below any number of times:

1st Alternative'[^'\\]*(?:\\.[^'\\]*)*'

'the literal ' (39₁₀ / 47₈ / 27₁₆)

Negated Character Class[^'\\]*

*matches any number of characters outside the set below:

'the literal ' (39₁₀ / 47₈ / 27₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

Non-Capturing Group(?:\\.[^'\\]*)*

*repeats the group contents below any number of times:

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

.any character (except for line terminators)

Negated Character Class[^'\\]*

*matches any number of characters outside the set below:

'the literal ' (39₁₀ / 47₈ / 27₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

2nd Alternative"[^"\\]*(?:\\.[^"\\]*)*"

"the literal " (34₁₀ / 42₈ / 22₁₆)

Negated Character Class[^"\\]*

*matches any number of characters outside the set below:

"the literal " (34₁₀ / 42₈ / 22₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

Non-Capturing Group(?:\\.[^"\\]*)*

*repeats the group contents below any number of times:

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

.any character (except for line terminators)

Negated Character Class[^"\\]*

*matches any number of characters outside the set below:

"the literal " (34₁₀ / 42₈ / 22₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

3rd Alternative[^"'()]++

Negated Character Class[^"'()]++

++matches at least one character outside the set below:

"the literal " (34₁₀ / 42₈ / 22₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

4th Alternative(?3)

(?3)calls group 3 as a subroutine

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

\s*any whitespace character, repeated any number of times

\zend of string

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

(?:((?(3)\s*|\R*)->\s*([\w.]*(\((?>'[^'\\]*(?:\\.[^'\\]*)*'|"[^"\\]*(?:\\.[^"\\]*)*"|[^"'()]++|(?3))*\)))))+\s*\z

New

o.start_time = obj.s;
o.repair_type -> obj.r;
o.limit -> obj.l;
->god("('\"\"')") ->fox(,'->')
->egg()->dog(,'c')
     ->cat(,'b')-> banana(,'a"\'\(\)\'->"()(')  ->  apple(,'a')

Substitution

o.start_time = obj.s;
o.repair_type -> obj.r;
o.limit -> obj.l;
->god("('\"\"')") ->fox(,'->')
->egg()->dog(,'c')
     ->cat(,'b')-> banana(,'a"\'\(\)\'->"()(')  ->  apple(,'a')