visitLiteral method
Implementation
@override
void visitLiteral(LiteralExpression node) {
final text = node.text;
if (text.isEmpty) {
_addAllCharactersWithEof(node);
} else {
final characters = SparseBoolList();
final rune = text.runes.first;
final group = GroupedRangeList<bool>(rune, rune, true);
characters.addGroup(group);
_addCharacters(node, characters);
}
}