it seems the user defined literals can to be used as a placeholders: https://godbolt.org/z/dYh465xqz motivation: each placeholder needs to be created before use, potentially, not all placeholders will be created in advance.
it seems the user defined literals can to be used as a placeholders: https://godbolt.org/z/dYh465xqz
motivation: each placeholder needs to be created before use, potentially, not all placeholders will be created in advance.