Regular Expressions 101

Non-Capturing Group(?:(.*)\s+(&|\*)\s*const|(.*)(?:\s+)const(?:\s*)(&|\*)?)

1st Alternative(.*)\s+(&|\*)\s*const

Group 1(.*)

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

\s+a Unicode whitespace character, repeated at least once

Group 2(&|\*)

1st Alternative&

&the literal & (38₁₀ / 46₈ / 26₁₆)

2nd Alternative\*

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

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

constthe literal text const (case sensitive)

2nd Alternative(.*)(?:\s+)const(?:\s*)(&|\*)?

Group 3(.*)

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

Non-Capturing Group(?:\s+)

\s+a Unicode whitespace character, repeated at least once

constthe literal text const (case sensitive)

Non-Capturing Group(?:\s*)

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

Group 4(&|\*)?

?repeats the group contents below at most once:

1st Alternative&

&the literal & (38₁₀ / 46₈ / 26₁₆)

2nd Alternative\*

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

$end of line

Global pattern flags

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?:(.*)\s+(&|\*)\s*const|(.*)(?:\s+)const(?:\s*)(&|\*)?)$

New

std::string const&
std::string const
const std::string&
const char*
std::unordered_map<int, EnhancedGameObject*> const*
std::string * const
char const *

Regular Expression

Extraction