Add the clang library to the repo (with some of my changes, too).

1 files changed, 199 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/anonymous-union.cpp b/clang/test/SemaCXX/anonymous-union.cpp
new file mode 100644
index 0000000..2dd7ab8
--- /dev/null
+++ b/clang/test/SemaCXX/anonymous-union.cpp
@@ -0,0 +1,199 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -pedantic %s
+struct X {
+  union {
+    float f3;
+    double d2;
+  } named;
+
+  union {
+    int i;
+    float f;
+    
+    union {
+      float f2;
+      mutable double d;
+    };
+  };
+
+  void test_unqual_references();
+
+  struct { // expected-warning{{anonymous structs are a GNU extension}}
+    int a;
+    float b;
+  };
+
+  void test_unqual_references_const() const;
+
+  mutable union { // expected-error{{anonymous union at class scope must not have a storage specifier}}
+    float c1;
+    double c2;
+  };
+};
+
+void X::test_unqual_references() {
+  i = 0;
+  f = 0.0;
+  f2 = f;
+  d = f;
+  f3 = 0; // expected-error{{use of undeclared identifier 'f3'}}
+  a = 0;
+}
+
+void X::test_unqual_references_const() const {
+  d = 0.0;
+  f2 = 0; // expected-error{{read-only variable is not assignable}}
+  a = 0; // expected-error{{read-only variable is not assignable}}
+}
+
+void test_unqual_references(X x, const X xc) {
+  x.i = 0;
+  x.f = 0.0;
+  x.f2 = x.f;
+  x.d = x.f;
+  x.f3 = 0; // expected-error{{no member named 'f3'}}
+  x.a = 0;
+
+  xc.d = 0.0;
+  xc.f = 0; // expected-error{{read-only variable is not assignable}}
+  xc.a = 0; // expected-error{{read-only variable is not assignable}}
+}
+
+
+struct Redecl {
+  int x; // expected-note{{previous declaration is here}}
+  class y { };
+
+  union {
+    int x; // expected-error{{member of anonymous union redeclares 'x'}}
+    float y;
+    double z; // expected-note{{previous declaration is here}}
+    double zz; // expected-note{{previous definition is here}}
+  };
+
+  int z; // expected-error{{duplicate member 'z'}}
+  void zz(); // expected-error{{redefinition of 'zz' as different kind of symbol}}
+};
+
+union { // expected-error{{anonymous unions at namespace or global scope must be declared 'static'}}
+  int int_val;
+  float float_val;
+};
+
+static union {
+  int int_val2;
+  float float_val2;
+};
+
+void f() {
+  int_val2 = 0;
+  float_val2 = 0.0;
+}
+
+void g() {
+  union {
+    int i;
+    float f2;
+  };
+  i = 0;
+  f2 = 0.0;
+}
+
+struct BadMembers {
+  union {
+    struct X { }; // expected-error {{types cannot be declared in an anonymous union}}
+    struct { int x; int y; } y;
+    
+    void f(); // expected-error{{functions cannot be declared in an anonymous union}}
+  private: int x1; // expected-error{{anonymous union cannot contain a private data member}}
+  protected: float x2; // expected-error{{anonymous union cannot contain a protected data member}}
+  };
+};
+
+// <rdar://problem/6481130>
+typedef union { }; // expected-warning{{declaration does not declare anything}}
+
+// <rdar://problem/7562438>
+typedef struct objc_module *Foo ;
+
+typedef struct _s {
+    union {
+        int a;
+        int Foo;
+    };
+} s, *ps;
+
+// <rdar://problem/7987650>
+namespace test4 {
+  class A {
+    struct { // expected-warning{{anonymous structs are a GNU extension}}
+      int s0; // expected-note {{declared private here}}
+      double s1; // expected-note {{declared private here}}
+      union {
+        int su0; // expected-note {{declared private here}}
+        double su1; // expected-note {{declared private here}}
+      };
+    };
+    union {
+      int u0; // expected-note {{declared private here}}
+      double u1; // expected-note {{declared private here}}
+      struct { // expected-warning{{anonymous structs are a GNU extension}}
+        int us0; // expected-note {{declared private here}}
+        double us1; // expected-note {{declared private here}}
+      };
+    };
+  };
+
+  void test() {
+    A a;
+    (void) a.s0;  // expected-error {{private member}}
+    (void) a.s1;  // expected-error {{private member}}
+    (void) a.su0; // expected-error {{private member}}
+    (void) a.su1; // expected-error {{private member}}
+    (void) a.u0;  // expected-error {{private member}}
+    (void) a.u1;  // expected-error {{private member}}
+    (void) a.us0; // expected-error {{private member}}
+    (void) a.us1; // expected-error {{private member}}
+  }
+}
+
+typedef void *voidPtr;
+
+void f2() {
+    union { int **ctxPtr; void **voidPtr; };
+}
+
+void foo_PR6741() {
+    union {
+        char *m_a;
+        int *m_b;
+    };
+ 
+    if(1) {
+        union {
+            char *m_a;
+            int *m_b;
+        };
+    }
+}
+
+namespace PR8326 {
+  template <class T>
+  class Foo {
+  public:
+    Foo()
+      : x(0)
+      , y(1){
+    }
+  
+  private:
+    const union { // expected-warning{{anonymous union cannot be 'const'}}
+      struct { // expected-warning{{anonymous structs are a GNU extension}}
+        T x;
+        T y;
+      };
+      T v[2];
+    };
+  };
+
+  Foo<int> baz;
+}