Method preVisit

src/ast/ast_allocate_stack.cpp:195–198

            return !st->isTemplate;     // not a thing with templates
        }
        virtual void preVisit ( Structure * var ) override {
            Visitor::preVisit(var);
            inStruct = true;
        }
        virtual StructurePtr visit ( Structure * var ) override {
            inStruct = false;
            return Visitor::visit(var);