function visit()

in packages/flow-remove-types/index.js [521:550]

• 29 lines of code
• 12 McCabe index (conditional complexity)

function visit(ast, context, visitor) {
  var stack;
  var parent;
  var keys = [];
  var index = -1;

  do {
    index++;
    if (stack && index === keys.length) {
      parent = stack.parent;
      keys = stack.keys;
      index = stack.index;
      stack = stack.prev;
    } else {
      var node = parent ? parent[keys[index]] : getProgram(ast);
      if (node && typeof node === 'object' && (node.type || node.length)) {
        if (node.type) {
          var visitFn = visitor[node.type];
          if (visitFn && visitFn(context, node, ast) === false) {
            continue;
          }
        }
        stack = {parent: parent, keys: keys, index: index, prev: stack};
        parent = node;
        keys = Object.keys(node);
        index = -1;
      }
    }
  } while (stack);
}