fastParseOn method

int fastParseOn(
  1. String buffer,
  2. int position
)

Parses buffer starting at position without allocating a Result.

An optimized version of parseOn that gains its speed advantage by avoiding unnecessary memory allocations.

Overridden in most concrete subclasses to implement the optimized logic. Takes a buffer and the current position in that buffer. Returns a new (positive) position in case of a successful parse, or -1 in case of a failure.

Subclasses do not necessarily have to override this method, since it is emulated using parseOn.

Implementation

int fastParseOn(String buffer, int position) {
  final result = parseOn(Context(buffer, position));
  return result is Failure ? -1 : result.position;
}