const regex = /(\/\*.*?\*\/?)|(([ ]+)?\/\/.*?$)/gms;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(\\\/\\*.*?\\*\\\/?)|(([ ]+)?\\\/\\\/.*?$)', 'gms')
const str = `/*
Multiline comments.
*/
int some_func(int n) {
int i; /* In between line comments */ int j;
int sum;
// Single line comments (include all prior spaces/tabs).
for (i = 0; i < n; i++) {
for (j = i; j > 0; j--) {
sum += j; // Inline comments.
}
}
/* /* // don't worry about comments in comments! */ */
return sum + 7;
}
/**/ //Empty comments.
// Comments at the beginning of new line.
int main() {
printf(some_func(5));
}
`;
const subst = ``;
// The substituted value will be contained in the result variable
const result = str.replace(regex, subst);
console.log('Substitution result: ', result);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions