[temp.pre] Fix note about uniqueness of a template name in a scope

Author: Endilll

source/templates.tex

@@ -143,12 +143,26 @@
 \begin{note}
 A template cannot have the same name as any other
 name bound in the same scope\iref{basic.scope.scope}, except
-that a function template can share a name with non-template
-functions\iref{dcl.fct} and/or function templates\iref{temp.over}.
+that a function template can share a name with \grammarterm{using-declarator}s,
+a type, non-template functions\iref{dcl.fct} and/or function templates\iref{temp.over}.
 Specializations, including partial specializations\iref{temp.spec.partial},
 do not reintroduce or bind names.
 Their target scope is the target scope of the primary template,
 so all specializations of a template belong to the same scope as it does.
+\begin{example}
+\begin{codeblock}
+void f() {}
+class f {};                                     // OK
+namespace N {
+  void f(int) {}
+}
+using N::f;                                     // OK
+template<typename> void f(long) {}              // \#1, OK
+template<typename> void f(long) {}              // error: redefinition of \#1
+template<typename> void f(long long) {}         // OK
+template<>         void f<int>(long long) {}    // OK, doesn't bind a name
+\end{codeblock}
+\end{example}
 \end{note}
 
 \pnum