@ngdoc error
@name ngRepeat:badident
@fullName Invalid identifier expression
@description

Occurs when an invalid identifier is specified in an {@link ng.directive:ngRepeat ngRepeat} expression.

The {@link ng.directive:ngRepeat ngRepeat} directive's `alias as` syntax is used to assign an alias for the processed collection in scope.

If the expression is not a simple identifier (such that you could declare it with `var {name}`, or if the expression is a reserved name,
this error is thrown.

Reserved names include:

  - `null`
  - `this`
  - `undefined`
  - `$parent`
  - `$id`
  - `$root`
  - `$even`
  - `$odd`
  - `$first`
  - `$last`
  - `$middle`

Invalid expressions might look like this:

```html
<li ng-repeat="item in items | filter:searchString as this">{{item}}</li>
<li ng-repeat="item in items | filter:searchString as some.objects["property"]">{{item}}</li>
<li ng-repeat="item in items | filter:searchString as resultOfSomeMethod()">{{item}}</li>
<li ng-repeat="item in items | filter:searchString as foo=6">{{item}}</li>
```

Valid expressions might look like this:

```html
<li ng-repeat="item in items | filter:searchString as collections">{{item}}</li>
<li ng-repeat="item in items | filter:searchString as filteredCollection">{{item}}</li>
```