fastParseOn method

  1. @override
  2. @noBoundsChecks
int fastParseOn(
  1. String buffer,
  2. int position
)
override

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

@override
@noBoundsChecks
int fastParseOn(String buffer, int position) {
  final end = buffer.length;
  var count = 0;
  while (count < max &&
      position < end &&
      predicate.test(buffer.codeUnitAt(position))) {
    position++;
    count++;
  }
  return count >= min ? position : -1;
}