diff --git a/src/third_party/llvm-project/clang/test/SemaCXX/nested-name-spec.cpp b/src/third_party/llvm-project/clang/test/SemaCXX/nested-name-spec.cpp
new file mode 100644
index 0000000..725ac64
--- /dev/null
+++ b/src/third_party/llvm-project/clang/test/SemaCXX/nested-name-spec.cpp
@@ -0,0 +1,462 @@
+// RUN: %clang_cc1 -fsyntax-only -std=c++98 -verify -fblocks %s 
+namespace A {
+  struct C {
+    static int cx;
+
+    static int cx2;
+
+    static int Ag1();
+    static int Ag2();
+  };
+  int ax; // expected-note {{'ax' declared here}}
+  void Af();
+}
+
+A:: ; // expected-error {{expected unqualified-id}}
+::A::ax::undef ex3; // expected-error {{'ax' is not a class, namespace, or enumeration}}
+A::undef1::undef2 ex4; // expected-error {{no member named 'undef1'}}
+
+int A::C::Ag1() { return 0; }
+
+static int A::C::Ag2() { return 0; } // expected-error{{'static' can}}
+
+int A::C::cx = 17;
+
+
+static int A::C::cx2 = 17; // expected-error{{'static' can}}
+
+class C2 {
+  void m(); // expected-note{{member declaration does not match because it is not const qualified}}
+
+  void f(const int& parm); // expected-note{{type of 1st parameter of member declaration does not match definition ('const int &' vs 'int')}}
+  void f(int) const; // expected-note{{member declaration does not match because it is const qualified}}
+  void f(float);
+
+  int x;
+};
+
+void C2::m() const { } // expected-error{{out-of-line definition of 'm' does not match any declaration in 'C2'}}
+
+void C2::f(int) { } // expected-error{{out-of-line definition of 'f' does not match any declaration in 'C2'}}
+
+void C2::m() {
+  x = 0;
+}
+
+namespace B {
+  void ::A::Af() {} // expected-error {{cannot define or redeclare 'Af' here because namespace 'B' does not enclose namespace 'A'}}
+}
+
+void f1() {
+  void A::Af(); // expected-error {{definition or redeclaration of 'Af' not allowed inside a function}}
+  void (^x)() = ^{ void A::Af(); }; // expected-error {{definition or redeclaration of 'Af' not allowed inside a block}}
+}
+
+void f2() {
+  A:: ; // expected-error {{expected unqualified-id}}
+  A::C::undef = 0; // expected-error {{no member named 'undef'}}
+  ::A::C::cx = 0;
+  int x = ::A::ax = A::C::cx;
+  x = sizeof(A::C);
+  x = sizeof(::A::C::cx);
+}
+
+A::C c1;
+struct A::C c2;
+struct S : public A::C {};
+struct A::undef; // expected-error {{no struct named 'undef' in namespace 'A'}}
+
+namespace A2 {
+  typedef int INT;
+  struct RC;
+  struct CC {
+    struct NC;
+  };
+}
+
+struct A2::RC {
+  INT x;
+};
+
+struct A2::CC::NC {
+  void m() {}
+};
+
+void f3() {
+  N::x = 0; // expected-error {{use of undeclared identifier 'N'}}
+  // FIXME: Consider including the kind of entity that 'N' is ("variable 'N'
+  // declared here", "template 'X' declared here", etc) to help explain what it
+  // is if it's 'not a class, namespace, or scoped enumeration'.
+  int N; // expected-note {{'N' declared here}}
+  N::x = 0; // expected-error {{'N' is not a class, namespace, or enumeration}}
+  { int A;           A::ax = 0; }
+  { typedef int A;   A::ax = 0; } // expected-error{{'A' (aka 'int') is not a class, namespace, or enumeration}}
+  { typedef A::C A;  A::ax = 0; } // expected-error {{no member named 'ax'}}
+  { typedef A::C A;  A::cx = 0; }
+}
+
+// make sure the following doesn't hit any asserts
+void f4(undef::C); // expected-error {{use of undeclared identifier 'undef'}}
+
+typedef void C2::f5(int); // expected-error{{typedef declarator cannot be qualified}}
+
+void f6(int A2::RC::x); // expected-error{{parameter declarator cannot be qualified}}
+
+int A2::RC::x; // expected-error{{non-static data member defined out-of-line}}
+
+void A2::CC::NC::m(); // expected-error{{out-of-line declaration of a member must be a definition}}
+
+
+namespace E {
+  int X = 5;
+  
+  namespace Nested {
+    enum E {
+      X = 0
+    };
+
+    int f() {
+      return E::X; // expected-warning{{use of enumeration in a nested name specifier is a C++11 extension}}
+    }
+  }
+}
+
+
+class Operators {
+  Operators operator+(const Operators&) const; // expected-note{{member declaration does not match because it is const qualified}}
+  operator bool();
+};
+
+Operators Operators::operator+(const Operators&) { // expected-error{{out-of-line definition of 'operator+' does not match any declaration in 'Operators'}}
+  Operators ops;
+  return ops;
+}
+
+Operators Operators::operator+(const Operators&) const {
+  Operators ops;
+  return ops;
+}
+
+Operators::operator bool() {
+  return true;
+}
+
+namespace A {
+  void g(int&); // expected-note{{type of 1st parameter of member declaration does not match definition ('int &' vs 'const int &')}}
+} 
+
+void A::f() {} // expected-error-re{{out-of-line definition of 'f' does not match any declaration in namespace 'A'{{$}}}}
+
+void A::g(const int&) { } // expected-error{{out-of-line definition of 'g' does not match any declaration in namespace 'A'}}
+
+struct Struct { };
+
+void Struct::f() { } // expected-error{{out-of-line definition of 'f' does not match any declaration in 'Struct'}}
+
+void global_func(int);
+void global_func2(int);
+
+namespace N {
+  void ::global_func(int) { } // expected-error{{definition or redeclaration of 'global_func' cannot name the global scope}}
+
+  void f();
+  // FIXME: if we move this to a separate definition of N, things break!
+}
+void ::global_func2(int) { } // expected-warning{{extra qualification on member 'global_func2'}}
+
+void N::f() { } // okay
+
+struct Y;  // expected-note{{forward declaration of 'Y'}}
+Y::foo y; // expected-error{{incomplete type 'Y' named in nested name specifier}}
+
+namespace PR25156 {
+struct Y;  // expected-note{{forward declaration of 'PR25156::Y'}}
+void foo() {
+  Y::~Y(); // expected-error{{incomplete type 'PR25156::Y' named in nested name specifier}}
+}
+}
+
+X::X() : a(5) { } // expected-error{{use of undeclared identifier 'X'}}
+
+struct foo_S {
+  static bool value;
+};
+bool (foo_S::value);
+
+
+namespace somens {
+  struct a { }; // expected-note{{candidate constructor (the implicit copy constructor)}}
+}
+
+template <typename T>
+class foo {
+};
+
+
+// PR4452 / PR4451
+foo<somens:a> a2;  // expected-error {{unexpected ':' in nested name specifier}}
+
+somens::a a3 = a2; // expected-error {{no viable conversion}}
+
+// typedefs and using declarations.
+namespace test1 {
+  namespace ns {
+    class Counter { public: static int count; };
+    typedef Counter counter;
+  }
+  using ns::counter;
+
+  class Test {
+    void test1() {
+      counter c;
+      c.count++;
+      counter::count++;
+    }
+  };
+}
+
+// We still need to do lookup in the lexical scope, even if we push a
+// non-lexical scope.
+namespace test2 {
+  namespace ns {
+    extern int *count_ptr;
+  }
+  namespace {
+    int count = 0;
+  }
+
+  int *ns::count_ptr = &count;
+}
+
+// PR6259, invalid case
+namespace test3 {
+  class A; // expected-note {{forward declaration}}
+  void foo(const char *path) {
+    A::execute(path); // expected-error {{incomplete type 'test3::A' named in nested name specifier}}
+  }
+}
+
+namespace PR7133 {
+  namespace A {
+    class Foo;
+  }
+
+  namespace A {
+    namespace B {
+      bool foo(Foo &);
+    }
+  }
+
+  bool A::B::foo(Foo &) {
+    return false;
+  }
+}
+
+class CLASS {
+  void CLASS::foo2(); // expected-error {{extra qualification on member 'foo2'}}
+};
+
+namespace PR8159 {
+  class B { };
+
+  class A {
+    int A::a; // expected-error{{extra qualification on member 'a'}}
+    static int A::b; // expected-error{{extra qualification on member 'b'}}
+    int ::c; // expected-error{{non-friend class member 'c' cannot have a qualified name}}
+  };
+}
+
+namespace rdar7980179 {
+  class A { void f0(); }; // expected-note {{previous}}
+  int A::f0() {} // expected-error {{return type of out-of-line definition of 'rdar7980179::A::f0' differs}}
+}
+
+namespace alias = A;
+double *dp = (alias::C*)0; // expected-error{{cannot initialize a variable of type 'double *' with an rvalue of type 'alias::C *'}}
+
+// http://llvm.org/PR10109
+namespace PR10109 {
+template<typename T>
+struct A {
+protected:
+  struct B;
+  struct B::C; // expected-error {{requires a template parameter list}} \
+               // expected-error {{no struct named 'C'}} \
+    // expected-error{{non-friend class member 'C' cannot have a qualified name}}
+};
+
+template<typename T>
+struct A2 {
+protected:
+  struct B;
+};
+template <typename T>
+struct A2<T>::B::C; // expected-error {{no struct named 'C'}}
+}
+
+namespace PR13033 {
+namespace NS {
+ int a; // expected-note {{'NS::a' declared here}}
+ int longer_b; //expected-note {{'NS::longer_b' declared here}}
+}
+
+// Suggest adding a namespace qualifier to both variable names even though one
+// is only a single character long.
+int foobar = a + longer_b; // expected-error {{use of undeclared identifier 'a'; did you mean 'NS::a'?}} \
+                           // expected-error {{use of undeclared identifier 'longer_b'; did you mean 'NS::longer_b'?}}
+}
+
+// <rdar://problem/13853540>
+namespace N {
+  struct X { };
+  namespace N {
+    struct Foo {
+      struct N::X *foo(); // expected-error{{no struct named 'X' in namespace 'N::N'}}
+    };
+  }
+}
+
+namespace TypedefNamespace { typedef int F; };
+TypedefNamespace::F::NonexistentName BadNNSWithCXXScopeSpec; // expected-error {{'TypedefNamespace::F' (aka 'int') is not a class, namespace, or enumeration}}
+
+namespace PR18587 {
+
+struct C1 {
+  int a, b, c;
+  typedef int C2;
+  struct B1 {
+    struct B2 {
+      int a, b, c;
+    };
+  };
+};
+struct C2 { static const unsigned N1 = 1; };
+struct B1 {
+  enum E1 { B2 = 2 };
+  static const int B3 = 3;
+};
+const int N1 = 2;
+
+// Function declarators
+struct S1a { int f(C1::C2); };
+struct S1b { int f(C1:C2); };  // expected-error{{unexpected ':' in nested name specifier; did you mean '::'?}}
+
+struct S2a {
+  C1::C2 f(C1::C2);
+};
+struct S2c {
+  C1::C2 f(C1:C2);  // expected-error{{unexpected ':' in nested name specifier; did you mean '::'?}}
+};
+
+struct S3a {
+  int f(C1::C2), C2 : N1;
+  int g : B1::B2;
+};
+struct S3b {
+  int g : B1:B2;  // expected-error{{unexpected ':' in nested name specifier; did you mean '::'?}}
+};
+
+// Inside square brackets
+struct S4a {
+  int f[C2::N1];
+};
+struct S4b {
+  int f[C2:N1];  // expected-error{{unexpected ':' in nested name specifier; did you mean '::'?}}
+};
+
+struct S5a {
+  int f(int xx[B1::B3 ? C2::N1 : B1::B2]);
+};
+struct S5b {
+  int f(int xx[B1::B3 ? C2::N1 : B1:B2]);  // expected-error{{unexpected ':' in nested name specifier; did you mean '::'?}}
+};
+struct S5c {
+  int f(int xx[B1:B3 ? C2::N1 : B1::B2]);  // expected-error{{unexpected ':' in nested name specifier; did you mean '::'?}}
+};
+
+// Bit fields
+struct S6a {
+  C1::C2 m1 : B1::B2;
+};
+struct S6c {
+  C1::C2 m1 : B1:B2;  // expected-error{{unexpected ':' in nested name specifier; did you mean '::'?}}
+};
+struct S6d {
+  int C2:N1;
+};
+struct S6e {
+  static const int N = 3;
+  B1::E1 : N;
+};
+struct S6g {
+  C1::C2 : B1:B2;  // expected-error{{unexpected ':' in nested name specifier; did you mean '::'?}}
+  B1::E1 : B1:B2;  // expected-error{{unexpected ':' in nested name specifier; did you mean '::'?}}
+};
+
+// Template parameters
+template <int N> struct T1 {
+  int a,b,c;
+  static const unsigned N1 = N;
+  typedef unsigned C1;
+};
+T1<C2::N1> var_1a;
+T1<C2:N1> var_1b;  // expected-error{{unexpected ':' in nested name specifier; did you mean '::'?}}
+template<int N> int F() {}
+int (*X1)() = (B1::B2 ? F<1> : F<2>);
+int (*X2)() = (B1:B2 ? F<1> : F<2>);  // expected-error{{unexpected ':' in nested name specifier; did you mean '::'?}}
+
+// Bit fields + templates
+struct S7a {
+  T1<B1::B2>::C1 m1 : T1<B1::B2>::N1;
+};
+struct S7b {
+  T1<B1:B2>::C1 m1 : T1<B1::B2>::N1;  // expected-error{{unexpected ':' in nested name specifier; did you mean '::'?}}
+};
+struct S7c {
+  T1<B1::B2>::C1 m1 : T1<B1:B2>::N1;  // expected-error{{unexpected ':' in nested name specifier; did you mean '::'?}}
+};
+
+}
+
+namespace PR16951 {
+  namespace ns {
+    enum an_enumeration {
+      ENUMERATOR  // expected-note{{'ENUMERATOR' declared here}}
+    };
+  }
+
+  int x1 = ns::an_enumeration::ENUMERATOR; // expected-warning{{use of enumeration in a nested name specifier is a C++11 extension}}
+
+  int x2 = ns::an_enumeration::ENUMERATOR::vvv; // expected-warning{{use of enumeration in a nested name specifier is a C++11 extension}} \
+                                                // expected-error{{'ENUMERATOR' is not a class, namespace, or enumeration}} \
+
+  int x3 = ns::an_enumeration::X; // expected-warning{{use of enumeration in a nested name specifier is a C++11 extension}} \
+                                  // expected-error{{no member named 'X'}}
+
+  enum enumerator_2 {
+    ENUMERATOR_2
+  };
+
+  int x4 = enumerator_2::ENUMERATOR_2; // expected-warning{{use of enumeration in a nested name specifier is a C++11 extension}}
+  int x5 = enumerator_2::X2; // expected-warning{{use of enumeration in a nested name specifier is a C++11 extension}} \
+                             // expected-error{{no member named 'X2' in 'PR16951::enumerator_2'}}
+
+}
+
+namespace PR30619 {
+c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d;
+// expected-error@-1 16{{unknown type name 'c'}}
+c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d;
+// expected-error@-1 16{{unknown type name 'c'}}
+c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d;
+// expected-error@-1 16{{unknown type name 'c'}}
+c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d; c d;
+// expected-error@-1 16{{unknown type name 'c'}}
+namespace A {
+class B {
+  typedef C D; // expected-error{{unknown type name 'C'}}
+  A::D::F;
+  // expected-error@-1{{'PR30619::A::B::D' (aka 'int') is not a class, namespace, or enumeration}}
+};
+}
+}