regex101: Golang Match Workspace

1st Alternative(?s)(?:new\sMyClass$[^;]*?new\sAnotherClass\($.*?\))

(?s)applies the following effective flags to the remainder of the pattern: gms

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

Non-Capturing Group(?:new\sMyClass$[^;]*?new\sAnotherClass\($.*?\))

newthe literal text new (case sensitive)

\sany whitespace character

MyClassthe literal text MyClass (case sensitive)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Negated Character Class[^;]*?

*?matches any number of characters outside the set below:

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

newthe literal text new (case sensitive)

\sany whitespace character

AnotherClassthe literal text AnotherClass (case sensitive)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

.*?any character, repeated any number of times

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

2nd Alternative(new\sMyClass$[^;]*?$)

Group 1(new\sMyClass$[^;]*?$)

newthe literal text new (case sensitive)

\sany whitespace character

MyClassthe literal text MyClass (case sensitive)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Negated Character Class[^;]*?

*?matches any number of characters outside the set below:

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Global pattern flags

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

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

Search reference

Regular Expression

(?s)(?:new\sMyClass\([^;]*?new\sAnotherClass\(\).*?\))|(new\sMyClass\([^;]*?\))

New

# case 0
return new MyClass(constructor, options, ...);

# case 1
var mc = new MyClass();
# case 2
var mc = new MyClass(new AnotherClass());
# case 3
var amc = new MyClass(options, new AnotherClass(), ...);

# case 4
MyClass mc = new MyClass(
  something
);

# case 5
MyClass mc = new MyClass(
  new AnotherClass()
);

# case 6
MyClass mc = new MyClass(
  options, new AnotherClass()
);

# case 7
var amc = new MyClass(new AnotherClass(), options, ...);