#11593: Template Haskell: Add a way to get names that are neither capturable nor capturing. -------------------------------------+------------------------------------- Reporter: cgibbard | Owner: Type: feature | Status: new request | Priority: normal | Milestone: Component: Template | Version: 7.10.3 Haskell | Keywords: | Operating System: Unknown/Multiple yhjulwwiefzojcbxybbruweejw | Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- From the documentation on newName: "Although names generated by newName cannot ''be captured'', they can ''capture'' other names." We recently ran into a case where we'd really have liked a way to create a name which can't interact at all with other names in the code, apart from where it is used in the construction of the TH expression. In this code: https://github.com/reflex-frp/reflex/blob/develop/src/Reflex/Dynamic/TH.hs The `newName "dynamicQuotedExpressionVariable"` used to be simply `newName "dyn"`, and we ended up having occurrences of `dyn` in the quasiquoted expressions (which would be constructed by NameG) get captured by that newName rather than referring to reflex-dom's definition of `dyn`. There ought to be some Q Name action which can be executed to give fresh names which can be used internally by a TH macro without fear that they can be referred to in any way other than using the Name value obtained from the action. The documentation for `Name` seems to suggest that newName is presently the closest thing, so perhaps we need a new primitive for creating totally-non-interacting Names. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11593 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler