- map<string, FunctionDeclaration *>::iterator i = stage->functions.find(format("%s(%s)", call.name, arg_types));
- declaration = (i!=stage->functions.end() ? i->second : 0);
+ string arg_types;
+ bool has_signature = true;
+ for(NodeArray<Expression>::const_iterator i=call.arguments.begin(); (has_signature && i!=call.arguments.end()); ++i)
+ {
+ if((*i)->type)
+ append(arg_types, ",", (*i)->type->name);
+ else
+ has_signature = false;
+ }
+
+ if(has_signature)
+ {
+ map<string, FunctionDeclaration *>::iterator i = stage->functions.find(format("%s(%s)", call.name, arg_types));
+ declaration = (i!=stage->functions.end() ? i->second : 0);
+ }