Index: clang-tools-extra/trunk/clang-tidy/readability/IdentifierNamingCheck.cpp
===================================================================
--- clang-tools-extra/trunk/clang-tidy/readability/IdentifierNamingCheck.cpp
+++ clang-tools-extra/trunk/clang-tidy/readability/IdentifierNamingCheck.cpp
@@ -65,6 +65,7 @@
     m(ValueTemplateParameter) \
     m(TemplateTemplateParameter) \
     m(TemplateParameter) \
+    m(TypeAlias) \
 
 enum StyleKind {
 #define ENUMERATE(v) SK_ ## v,
@@ -258,6 +259,9 @@
   if (isa<TypedefDecl>(D) && NamingStyles[SK_Typedef].isSet())
     return SK_Typedef;
 
+  if (isa<TypeAliasDecl>(D) && NamingStyles[SK_TypeAlias].isSet())
+    return SK_TypeAlias;
+
   if (const auto *Decl = dyn_cast<NamespaceDecl>(D)) {
     if (Decl->isAnonymousNamespace())
       return SK_Invalid;
Index: clang-tools-extra/trunk/test/clang-tidy/readability-identifier-naming.cpp
===================================================================
--- clang-tools-extra/trunk/test/clang-tidy/readability-identifier-naming.cpp
+++ clang-tools-extra/trunk/test/clang-tidy/readability-identifier-naming.cpp
@@ -61,6 +61,8 @@
 // RUN:     {key: readability-identifier-naming.VariableCase, value: lower_case}, \
 // RUN:     {key: readability-identifier-naming.VirtualMethodCase, value: UPPER_CASE}, \
 // RUN:     {key: readability-identifier-naming.VirtualMethodPrefix, value: 'v_'}, \
+// RUN:     {key: readability-identifier-naming.TypeAliasCase, value: lower_case}, \
+// RUN:     {key: readability-identifier-naming.TypeAliasSuffix, value: '_t'}, \
 // RUN:     {key: readability-identifier-naming.IgnoreFailedSplit, value: 0} \
 // RUN:   ]}' -- -std=c++11 -fno-delayed-template-parsing \
 // RUN:   -I%S/Inputs/readability-identifier-naming \
@@ -191,8 +193,8 @@
 // CHECK-FIXES: {{^}}class CMyOtherTemplatedClass : CMyTemplatedClass<  CMyClass>, private CMyDerivedClass {};{{$}}
 
 template<typename t_t>
-using MYSUPER_TPL = my_other_templated_class  <:: FOO_NS  ::my_class>;
-// CHECK-FIXES: {{^}}using MYSUPER_TPL = CMyOtherTemplatedClass  <:: foo_ns  ::CMyClass>;{{$}}
+using mysuper_tpl_t = my_other_templated_class  <:: FOO_NS  ::my_class>;
+// CHECK-FIXES: {{^}}using mysuper_tpl_t = CMyOtherTemplatedClass  <:: foo_ns  ::CMyClass>;{{$}}
 
 const int global_Constant = 6;
 // CHECK-MESSAGES: :[[@LINE-1]]:11: warning: invalid case style for global constant 'global_Constant'
@@ -305,6 +307,15 @@
 // CHECK-MESSAGES: :[[@LINE-1]]:26: warning: invalid case style for typedef 'struct_type'
 // CHECK-FIXES: {{^}}typedef this_structure struct_type_t;{{$}}
 
+using my_struct_type = THIS___Structure;
+// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: invalid case style for type alias 'my_struct_type'
+// CHECK-FIXES: {{^}}using my_struct_type_t = this_structure;{{$}}
+
+template<typename t_t>
+using SomeOtherTemplate = my_other_templated_class  <:: FOO_NS  ::my_class>;
+// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: invalid case style for type alias 'SomeOtherTemplate'
+// CHECK-FIXES: {{^}}using some_other_template_t = CMyOtherTemplatedClass  <:: foo_ns  ::CMyClass>;{{$}}
+
 static void static_Function() {
 // CHECK-MESSAGES: :[[@LINE-1]]:13: warning: invalid case style for function 'static_Function'
 // CHECK-FIXES: {{^}}static void staticFunction() {{{$}}