add support for value literals

src/dateparser/dateparser.js

@@ -102,6 +102,34 @@ angular.module('ui.bootstrap.dateparser', [])
   function createParser(format) {
     var map = [], regex = format.split('');
 
+    // check for literal values
+    var quoteIndex = format.indexOf('\'');
+    if (quoteIndex > -1) {
+      var inLiteral = false;
+      format = format.split('');
+      for (var i = quoteIndex; i < format.length; i++) {
+        if (inLiteral) {
+          if (format[i] === '\'') {
+            if ((i+1 < format.length) && (format[i+1] === '\'')) { // escaped single quote
+              format[i+1] = '$';
+              regex[i+1] = '';              
+            } else { // end of literal
+              regex[i] = '';
+              inLiteral = false;
+            }            
+          }
+          format[i] = '$';
+        } else {
+          if (format[i] === '\'') { // start of literal
+            format[i] = '$';
+            regex[i] = '';
+            inLiteral = true;            
+          }
+        }
+      }
+      format = format.join('');
+    }
+
     angular.forEach(formatCodeToRegex, function(data, code) {
       var index = format.indexOf(code);
 

src/dateparser/test/dateparser.spec.js

@@ -176,6 +176,24 @@ describe('date parser', function() {
     });
   });
 
+  describe('with value literals', function() {
+    it('should work with multiple literals', function () {
+      expect(dateParser.parse('29 de January de 2013', 'd \'de\' MMMM \'de\' y')).toEqual(new Date(2013, 0, 29));
+    });
+    it('should work with escaped single quote', function () {
+      expect(dateParser.parse('22.March.15 12 o\'clock', 'd.MMMM.yy h \'o\'\'clock\'')).toEqual(new Date(2015, 2, 22, 12));
+    });
+    it('should work with only a single quote', function () {
+      expect(dateParser.parse('22.March.15 \'', 'd.MMMM.yy \'\'\'')).toEqual(new Date(2015, 2, 22));
+    });
+    it('should work with trailing literal', function () {
+      expect(dateParser.parse('year 2013', '\'year\' y')).toEqual(new Date(2013, 0, 1));
+    });
+    it('should work without whitespace', function () {
+      expect(dateParser.parse('year:2013', '\'year:\'y')).toEqual(new Date(2013, 0, 1));
+    });
+  });
+
   describe('with edge case', function() {
     it('should not work for invalid number of days in February', function() {
       expect(dateParser.parse('29.02.2013', 'dd.MM.yyyy')).toBeUndefined();