Merge pull request #101 from fhahn/extended-types-template-args

Extend grammar to allow parameterized vendor extension types.

abi.html

@@ -4821,12 +4821,13 @@ <h5><a href="#mangling-builtin">5.1.5.2 Builtin types</a></h5>
                  ::= Da # auto
                  ::= Dc # decltype(auto)
                  ::= Dn # std::nullptr_t (i.e., decltype(nullptr))
-		 ::= u &lt;<a href="#mangle.source-name">source-name</a>&gt;	# vendor extended type
+		 ::= u &lt;<a href="#mangle.source-name">source-name</a>&gt; [&lt;<a href="#mangle.template-args">template-args</a>&gt;] # vendor extended type
 </pre></font></code>
 
 <p>
 Vendors who define builtin extended types shall encode them
-as a 'u' prefix followed by the name in &lt;length,ID> form.
+as a 'u' prefix followed by the name in &lt;length,I&gt; form,
+followed by any arguments to the extended type.
 
 <a name="mangle.function-type">
 <h5><a href="#mangle.function-type">5.1.5.3 Function types</a></h5>