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Diffstat (limited to 'compiler/GHC/Core/TyCon.hs')
| -rw-r--r-- | compiler/GHC/Core/TyCon.hs | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/compiler/GHC/Core/TyCon.hs b/compiler/GHC/Core/TyCon.hs index e50751c2a0..6514b68aaf 100644 --- a/compiler/GHC/Core/TyCon.hs +++ b/compiler/GHC/Core/TyCon.hs @@ -1184,7 +1184,9 @@ data AlgTyConRhs -- See Note [Newtype eta] nt_co :: CoAxiom Unbranched, -- The axiom coercion that creates the @newtype@ - -- from the representation 'Type'. + -- from the representation 'Type'. The axiom witnesses + -- a representational coercion: + -- nt_co :: N ty1 ~R# rep_tys -- See Note [Newtype coercions] -- Invariant: arity = #tvs in nt_etad_rhs; |