ghc-9.2.0.20210331: The GHC API
Safe HaskellSafe-Inferred
LanguageHaskell2010

GHC.Tc.Solver.Rewrite

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rewrite :: CtEvidence -> TcType -> TcS (Xi, TcCoercion) Source #

See Note [Rewriting]. If (xi, co) <- rewrite mode ev ty, then co :: xi ~r ty where r is the role in ev.

rewriteType :: CtLoc -> TcType -> TcS TcType Source #

Rewrite a type w.r.t. nominal equality. This is useful to rewrite a type w.r.t. any givens. It does not do type-family reduction. This will never emit new constraints. Call this when the inert set contains only givens.