Event _parseBlockMappingKey()

in lib/src/parser.dart [425:458]

• 27 lines of code
• 7 McCabe index (conditional complexity)

  Event _parseBlockMappingKey() {
    var token = _scanner.peek()!;
    if (token.type == TokenType.key) {
      var start = token.span.start;
      token = _scanner.advance()!;

      if (token.type == TokenType.key ||
          token.type == TokenType.value ||
          token.type == TokenType.blockEnd) {
        _state = _State.BLOCK_MAPPING_VALUE;
        return _processEmptyScalar(start);
      } else {
        _states.add(_State.BLOCK_MAPPING_VALUE);
        return _parseNode(block: true, indentlessSequence: true);
      }
    }

    // libyaml doesn't allow empty keys without an explicit key indicator, but
    // the spec does. See example 8.18:
    // http://yaml.org/spec/1.2/spec.html#id2798896.
    if (token.type == TokenType.value) {
      _state = _State.BLOCK_MAPPING_VALUE;
      return _processEmptyScalar(token.span.start);
    }

    if (token.type == TokenType.blockEnd) {
      _scanner.scan();
      _state = _states.removeLast();
      return Event(EventType.mappingEnd, token.span);
    }

    throw YamlException('Expected a key while parsing a block mapping.',
        token.span.start.pointSpan());
  }