[fixed] default in concat()

lib/string.js

@@ -77,25 +77,36 @@ function StringSchema() {
       }
     });
   },
-  matches: function matches(regex, msg) {
-    var _ref = arguments.length <= 2 || arguments[2] === undefined ? {} : arguments[2];
+  matches: function matches(regex) {
+    var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];
 
-    var _ref$excludeEmptyStri = _ref.excludeEmptyString;
-    var excludeEmptyString = _ref$excludeEmptyStri === undefined ? true : _ref$excludeEmptyStri;
+    var excludeEmptyString = false,
+        message = void 0;
+
+    if (options.message || options.hasOwnProperty('excludeEmptyString')) {
+      excludeEmptyString = options.excludeEmptyString;
+      message = options.message;
+    } else message = options;
 
     return this.test({
-      message: msg || _locale.string.matches,
+      message: message || _locale.string.matches,
       params: { regex: regex },
       test: function test(value) {
         return (0, _isAbsent2.default)(value) || value === '' && excludeEmptyString || regex.test(value);
       }
     });
   },
   email: function email(msg) {
-    return this.matches(rEmail, msg || _locale.string.email);
+    return this.matches(rEmail, {
+      message: msg || _locale.string.email,
+      excludeEmptyString: true
+    });
   },
   url: function url(msg) {
-    return this.matches(rUrl, msg || _locale.string.url);
+    return this.matches(rUrl, {
+      message: msg || _locale.string.url,
+      excludeEmptyString: true
+    });
   },
 
 

src/mixed.js

@@ -100,7 +100,7 @@ SchemaType.prototype = {
     var next = merge(this.clone(), schema.clone())
 
     // undefined isn't merged over, but is a valid value for default
-    if (schema._default === undefined && has(this, '_default'))
+    if (has(schema, '_default'))
       next._default = schema._default
 
     next.tests = cloned.tests;