A literal that represents set.
E.g. if set only contained the character "a" (lower case A), then the literal may be /a/.
A single character that can be repeated to cause super-linear runtime.
The implementation is allowed to pick any character in set but makes a best effort to pick a
"humanly readable" character.
A non-empty set of characters that can be repeated to cause super-linear runtime.
CharSet is a class from the refa library.
Whether the polynomial backtracking of this report causes exponential backtracking.
Returns a new literal with this cause of super-linear runtime being fixed. If the cause of this report could not
be automatically fixed, undefined will be returned.
A fixed literal is guaranteed to behave exactly the same as the analysed literal.
The character to be repeated in order to create an input for which the analysed literal will have super-linear runtime behavior.