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  "path": "/t/type-equality-in-gadt-typefamily-context/13876#post_3",
  "publishedAt": "2026-04-02T16:33:32.000Z",
  "site": "https://discourse.haskell.org",
  "tags": [
    "GitLab",
    "First-class apartness checking in type families (#17585) · Issues · Glasgow..."
  ],
  "textContent": "This is indeed difficult, unfortunately. It’s been discussed by the GHC developers a few times over the years, see in particular this ticket and those linking to it:\n\nGitLab\n\n### First-class apartness checking in type families (#17585) · Issues · Glasgow...\n\nI feel like GHC could keep track of apartness a bit more carefully. Consider for instance:",
  "title": "Type equality in GADT/TypeFamily context"
}