const regex = /int\s+.*? (
\{ # Match opening brace
(?: # Start non-capturing group
[^{}]++ # Match non-brace chars without backtracking
| # OR
(?-1) # Recursively match the entire expression
)* # Match 0 or more times
\}
)/gs;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('int\\s+.*? (
\\{ # Match opening brace
(?: # Start non-capturing group
[^{}]++ # Match non-brace chars without backtracking
| # OR
(?-1) # Recursively match the entire expression
)* # Match 0 or more times
\\}
)', 'gs')
const str = `int max(int x, int y)
{
if (x > y)
{
return x;
}
else
{
return y;
}
}`;
// Reset `lastIndex` if this regex is defined globally
// regex.lastIndex = 0;
let m;
while ((m = regex.exec(str)) !== null) {
// This is necessary to avoid infinite loops with zero-width matches
if (m.index === regex.lastIndex) {
regex.lastIndex++;
}
// The result can be accessed through the `m`-variable.
m.forEach((match, groupIndex) => {
console.log(`Found match, group ${groupIndex}: ${match}`);
});
}
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