declaredTypeNamesUnder function

Set<String> declaredTypeNamesUnder(
  1. String directory
)

The type names (class, mixin, enum, extension, typedef) declared at the start of a line in any .dart file under directory.

Implementation

Set<String> declaredTypeNamesUnder(String directory) {
  final declaration = RegExp(
    r'^\s*(?:abstract\s+|base\s+|final\s+|sealed\s+|mixin\s+)*'
    r'(?:class|mixin|enum|extension|typedef)\s+(\w+)',
  );
  final symbols = <String>{};
  final dir = Directory(directory);
  if (!dir.existsSync()) return symbols;
  for (final entity in dir.listSync(recursive: true).whereType<File>()) {
    if (!entity.path.endsWith('.dart')) continue;
    for (final line in const LineSplitter().convert(
      entity.readAsStringSync(),
    )) {
      final match = declaration.firstMatch(line);
      if (match != null) symbols.add(match.group(1)!);
    }
  }
  return symbols;
}