uniqueName method Null safety

String uniqueName(
  1. String name
)

Returns a variation on the input name that is guaranteed to never be repeated within this scope.

The variation will the input name, but with a numerical suffix appended. Ex. foo1, bar24

Implementation

String uniqueName(String name) {
  var count = 0;
  SymbolTable? search = this;

  while (search != null) {
    if (search._names.containsKey(name)) count += search._names[name]!;
    search = search._parent;
  }

  _names.putIfAbsent(name, () => 0);
  var n = _names[name];
  if (n != null) {
    n++;
    _names[name] = n;
  }
  return '$name$count';
}