Support "this" for calling task methods.

design_dump.cc

@@ -183,6 +183,15 @@ ostream& operator <<(ostream&o, struct __ScopePathManip marg)
       return o;
 }
 
+ostream& operator <<(ostream&o, struct __ObjectPathManip marg)
+{
+      if (marg.obj != 0) {
+	    dump_scope_path(o, marg.obj->scope());
+	    o << "." << marg.obj->name();
+      }
+      return o;
+}
+
 void NetBranch::dump(ostream&o, unsigned ind) const
 {
       static const char*pin_names[2] = {

elaborate.cc

@@ -3309,6 +3309,10 @@ NetProc* PCallTask::elaborate_method_(Design*des, NetScope*scope) const
 	// There is no signal to search for so this cannot be a method.
       if (use_path.empty()) return 0;
 
+	// Search for an object using the use_path. This should
+	// resolve to a class object. Note that the "this" symbol
+	// (internally represented as "@") is handled by there being a
+	// "this" object in the instance scope.
       symbol_search(this, des, scope, use_path,
 		    net, par, eve, ex1, ex2);
 

netlist.h

@@ -4600,6 +4600,12 @@ inline __ScopePathManip scope_path(const NetScope*scope)
 
 extern ostream& operator << (ostream&o, __ScopePathManip);
 
+struct __ObjectPathManip { const NetObj*obj; };
+inline __ObjectPathManip scope_path(const NetObj*obj)
+{ __ObjectPathManip tmp; tmp.obj = obj; return tmp; }
+
+extern ostream& operator << (ostream&o, __ObjectPathManip);
+
 /*
  * If this link has a nexus_ pointer, then it is the last Link in the
  * list. next_nlink() returns 0 for the last Link.

parse.y

@@ -5816,9 +5816,14 @@ statement_item /* This is roughly statement_item in the LRM */
       }
 
   | implicit_class_handle '.' hierarchy_identifier '(' expression_list_with_nuls ')' ';'
-      { PCallTask*tmp = new PCallTask(*$3, *$5);
-	yyerror(@1, "sorry: Implicit class handle not supported in front of task names.");
+      { pform_name_t*nam = $1;
+	while (! $3->empty()) {
+	      nam->push_back($3->front());
+	      $3->pop_front();
+	}
+	PCallTask*tmp = new PCallTask(*nam, *$5);
 	FILE_NAME(tmp, @1);
+	delete $1;
 	delete $3;
 	delete $5;
 	$$ = tmp;

symbol_search.cc

@@ -104,6 +104,12 @@ bool symbol_search(const LineInfo*li, Design*des, NetScope*scope,
       }
 
       while (scope) {
+	    if (path_tail.name == "#") {
+		  cerr << li->get_fileline() << ": sorry: "
+		       << "Implicit class handle \"super\" not supported." << endl;
+		  return false;
+	    }
+
 	    if (NetNet*net = scope->find_signal(path_tail.name)) {
 		  res->scope = scope;
 		  res->net = net;