Detect pure virtual methods.

src/shared/cplusplus/Bind.cpp

@@ -1734,6 +1734,9 @@ bool Bind::visit(SimpleDeclarationAST *ast)
 
             if (Function *funTy = decl->type()->asFunctionType()) {
                 funTy->setMethodKey(_methodKey);
+
+                if (funTy->isVirtual() && it->value->equals_token)
+                    funTy->setPureVirtual(true);
             }
         }