I have a directive which I am unable to use inside an ng-repeat block.
Here is my directive:
ap.directive('pastDate', function() {
    return {        
        require: 'ngModel',
        link: function (scope, element, attrs, ctrl) {
            ctrl.$validators.pastDate = function(modelValue) { // 'pastDate' is the name of your custom validator ...
                var today = new Date();
                today = new Date(today.getFullYear(), today.getMonth(), today.getDate());
                return (new Date(modelValue) > today);
            }
        }
    };
});
Here is the HTML
<ul id="todo-list">
            <li ng-repeat="x in todo">               
                <ng-form name="repeatForm">
                    <button ng-click="open()">{{x.doc._id}}</button>
                    <label class="label label-info">{{x.doc.Name}}</label>
                    <span>{{x.doc.Address1}}</span>
                    <span>{{x.doc.Address2}}</span>
                    <span name="expDt" pastDate>Expiry Date: {{x.doc.IssueDtto}}</span>
                    <span class="help-block" ng-show="repeatForm.expDt.$error.pastDate">Valid Date Required</span>
                </ng-form>
           </li>          
(My requirement is whenever x.doc.IssueDtto is less than current date, I want to highlight it)
Many thanks!
                        
I would do something like this:
Markup:
Angular:
Codepen: http://codepen.io/anon/pen/rVYebZ?editors=101
Right now the application highlight the whole line, you can highlight other element if you want.