Regular Expressions 101

Pro

1st Alternative("(?:[^"\\]|\\[\s\S])*"|'(?:[^'\\]|\\[\s\S])*')

Group 1("(?:[^"\\]|\\[\s\S])*"|'(?:[^'\\]|\\[\s\S])*')

1st Alternative"(?:[^"\\]|\\[\s\S])*"

"the literal " (34₁₀ / 42₈ / 22₁₆)

Non-Capturing Group(?:[^"\\]|\\[\s\S])*

*repeats the group contents below any number of times:

1st Alternative[^"\\]

Negated Character Class[^"\\]

"the literal " (34₁₀ / 42₈ / 22₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

2nd Alternative\\[\s\S]

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

Character Class[\s\S]

\sany whitespace character

\Sany non-whitespace character

"the literal " (34₁₀ / 42₈ / 22₁₆)

2nd Alternative'(?:[^'\\]|\\[\s\S])*'

'the literal ' (39₁₀ / 47₈ / 27₁₆)

Non-Capturing Group(?:[^'\\]|\\[\s\S])*

*repeats the group contents below any number of times:

1st Alternative[^'\\]

Negated Character Class[^'\\]

'the literal ' (39₁₀ / 47₈ / 27₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

2nd Alternative\\[\s\S]

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

Character Class[\s\S]

\sany whitespace character

\Sany non-whitespace character

'the literal ' (39₁₀ / 47₈ / 27₁₆)

2nd Alternative//.*

//the literal text //

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

3rd Alternative/\*(?:[^*]|\*(?!/))*\*/

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

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

*repeats the group contents below any number of times:

1st Alternative[^*]

Negated Character Class[^*]

*the literal * (42₁₀ / 52₈ / 2A₁₆)

2nd Alternative\*(?!/)

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

Negative Lookahead(?!/)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\*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

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

("(?:[^"\\]|\\[\s\S])*"|'(?:[^'\\]|\\[\s\S])*')|//.*|/\*(?:[^*]|\*(?!/))*\*/

New

/*My function
is great.*/
int j = 0//hello world
void foo(){
    //tricky example
    cout << "This // is // not a comment\n";
}

Substitution

\1

/*My function
is great.*/
int j = 0//hello world
void foo(){
    //tricky example
    cout << "This // is // not a comment\n";
}