Skip to content

GitLab

  • Menu
Projects Groups Snippets
  • Help
    • Help
    • Support
    • Community forum
    • Submit feedback
  • Sign in / Register
  • GHC GHC
  • Project information
    • Project information
    • Activity
    • Labels
    • Members
  • Repository
    • Repository
    • Files
    • Commits
    • Branches
    • Tags
    • Contributors
    • Graph
    • Compare
    • Locked Files
  • Issues 4,968
    • Issues 4,968
    • List
    • Boards
    • Service Desk
    • Milestones
    • Iterations
  • Merge requests 474
    • Merge requests 474
  • CI/CD
    • CI/CD
    • Pipelines
    • Jobs
    • Schedules
    • Test Cases
  • Deployments
    • Deployments
    • Releases
  • Analytics
    • Analytics
    • Value stream
    • CI/CD
    • Code review
    • Insights
    • Issue
    • Repository
  • Wiki
    • Wiki
  • Snippets
    • Snippets
  • Activity
  • Graph
  • Create a new issue
  • Jobs
  • Commits
  • Issue Boards
Collapse sidebar
  • Glasgow Haskell Compiler
  • GHCGHC
  • Issues
  • #10820
Closed
Open
Created Sep 01, 2015 by spinda@trac-spinda

Provide a way to detect what extensions are enabled via TH

This would be helpful for providing users with intuitive/explanatory error messages if generated code relies on an extension that the user may not have enabled.

Sample specification, to get things started:

enabledExts :: Q [Extension]
isExtEnabled :: Extension -> Q Bool
data Extension = LiberalTypeSynonyms | RankNTypes | ...
    -- mirroring ExtensionFlag in DynFlags

See #10819 (closed) for an example case where this could be of use.

Edited Mar 10, 2019 by Ben Gamari
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information
Assignee
Assign to
Time tracking