Get tests compiling with -Wunused-local-typedef

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@346914 91177308-0d34-0410-b5e6-96231b3b80d8

test/libcxx/depr/depr.function.objects/depr.adaptors.cxx1z.pass.cpp

@@ -24,15 +24,25 @@ int identity(int v) { return v; }
 int sum(int a, int b) { return a + b; }
 
 struct Foo {
-    int zero() const { return 0; }
-    int identity(int v) const { return v; }
-    int sum(int a, int b) const { return a + b; }
+  int zero() { return 0; }
+  int zero_const() const { return 1; }
+
+  int identity(int v) const { return v; }
+  int sum(int a, int b) const { return a + b; }
 };
 
 int main()
 {
     typedef std::pointer_to_unary_function<int, int> PUF;
     typedef std::pointer_to_binary_function<int, int, int> PBF;
+
+    static_assert(
+        (std::is_same<PUF, decltype(std::ptr_fun<int, int>(identity))>::value),
+        "");
+    static_assert(
+        (std::is_same<PBF, decltype(std::ptr_fun<int, int, int>(sum))>::value),
+        "");
+
     assert((std::ptr_fun<int, int>(identity)(4) == 4));
     assert((std::ptr_fun<int, int, int>(sum)(4, 5) == 9));
 
@@ -43,6 +53,12 @@ int main()
     typedef std::mem_fun_ref_t<int, Foo> MFR;
     typedef std::const_mem_fun_ref_t<int, Foo> CMFR;
 
+    static_assert(
+        (std::is_same<MFR, decltype(std::mem_fun_ref(&Foo::zero))>::value), "");
+    static_assert((std::is_same<CMFR, decltype(std::mem_fun_ref(
+                                          &Foo::zero_const))>::value),
+                  "");
+
     assert((std::mem_fun_ref(&Foo::zero)(f) == 0));
     assert((std::mem_fun_ref(&Foo::identity)(f, 5) == 5));
 }