isEL function Null safety

bool isEL(
  1. String data
)

Test if the given value is enclosed with [= ]. If null, false is returned.

Implementation

bool isEL(String data) {
  for (int i = 0, len = data.length; i < len; ++i) {
    final cc = data.codeUnitAt(i);
    if (cc == $backslash)
      ++i;
    else if (cc == $lbracket && i + 1 < len && data.codeUnitAt(i + 1) == $equal)
      return true;
  }
  return false;
}