Error Messages

Understanding and handling errors.

Pattern Errors

Error: regex parse error

Cause: Malformed regex pattern.

Fix: Check for unclosed groups, invalid quantifiers, etc.

Error: Feature not supported: backreferences

Cause: Pattern uses feature not implemented.

Fix: Simplify pattern or restructure.

Error: pattern cannot be empty

Cause: Empty regex not allowed.

Fix: Use non-empty pattern.

Error: edit limit too high

Cause: Edit limit exceeds maximum.

Fix: Reduce limit.

Error: invalid character class

Cause: Malformed character class.

Fix: Check class syntax.

Error: timeout after ...

Cause: Matching took too long.

Fix: Simplify pattern, reduce edit limit.

Not an error - use find() returning Option.

#![allow(unused)]
fn main() {
if let Some(m) = re.find(text) {
    // Match found
} else {
    // No match
}
}