visitArrowFunctionNode method

  1. @override
dynamic visitArrowFunctionNode(
  1. ArrowFunctionNode node
)

Implementation

@override
visitArrowFunctionNode(ArrowFunctionNode node) {
  final List<dynamic> args = computeArguments(node.params);
  final capturedLexicalContexts =
      List<_LexicalContext>.from(_lexicalContexts);
  return JavascriptFunction((List<dynamic>? _params, [dynamic thisArg]) {
    List<dynamic> params = _params ?? [];
    Map<String, dynamic> ctx = {};
    if (node.params != null) {
      for (int i = 0; i < node.params.length; i++) {
        final param = node.params[i];
        if (param is RestParameter) {
          _bindParameter(ctx, param.name, params.skip(i).toList(),
              line: param.line ?? node.line ?? 1);
          break;
        }
        dynamic value = i < params.length ? params[i] : null;
        if (param is DefaultParameter && value == null) {
          value = getValueFromExpression(param.defaultValue);
        }
        _bindParameter(
            ctx, param is DefaultParameter ? param.name : param, value,
            line: param.line ?? node.line ?? 1);
      }
    }
    Context context = SimpleContext(ctx);
    JSInterpreter i = cloneForContext(node, context, true);
    i._lexicalContexts
      ..clear()
      ..addAll(capturedLexicalContexts);
    dynamic rtn;
    try {
      if (node.body != null) {
        rtn = node.body.visitBy(i);
      }
    } on ControlFlowReturnException catch (e) {
      rtn = e.returnValue;
    }
    if (rtn is Node) {
      rtn = i.getValueFromNode(rtn);
    }
    return rtn;
  }, code.substring(node.start!, node.end));
}