[PATCH] D20018: Support variables and functions types in misc-unused-using-decls.

[Haojian Wu via cfe-commits]

hokein added inline comments.

================
Comment at: clang-tidy/misc/UnusedUsingDeclsCheck.cpp:39
@@ +38,3 @@
+    // Ignores using-declrations defined in class definition.
+    if (isa<CXXRecordDecl>(TargetDecl->getDeclContext()))
+      return;
----------------
djasper wrote:
> We should also ignore using declarations in function context (Koenig lookup..).
If we ignore them in function context, we will also skip the following case:

```
namespace a {
class A {};
};

void func() {
  using a::A; // unused-using decls.
}
```


http://reviews.llvm.org/D20018