Preliminary monad-comprehension patch (Trac #4370)

[ghc-hetmet.git] / compiler / typecheck / TcRnTypes.lhs

diff --git a/compiler/typecheck/TcRnTypes.lhs b/compiler/typecheck/TcRnTypes.lhs
index 8858c13..4b174e5 100644 (file)
--- a/compiler/typecheck/TcRnTypes.lhs
+++ b/compiler/typecheck/TcRnTypes.lhs
@@ -1112,6 +1112,7 @@ data CtOrigin
   | StandAloneDerivOrigin -- Typechecking stand-alone deriving
   | DefaultOrigin      -- Typechecking a default decl
   | DoOrigin           -- Arising from a do expression
+  | MCompOrigin         -- Arising from a monad comprehension
   | IfOrigin            -- Arising from an if statement
   | ProcOrigin         -- Arising from a proc expression
   | AnnOrigin           -- An annotation
@@ -1147,6 +1148,7 @@ pprO DerivOrigin     = ptext (sLit "the 'deriving' clause of a data type declarat
 pprO StandAloneDerivOrigin = ptext (sLit "a 'deriving' declaration")
 pprO DefaultOrigin        = ptext (sLit "a 'default' declaration")
 pprO DoOrigin             = ptext (sLit "a do statement")
+pprO MCompOrigin           = ptext (sLit "a statement in a monad comprehension")
 pprO ProcOrigin                   = ptext (sLit "a proc expression")
 pprO (TypeEqOrigin eq)     = ptext (sLit "an equality") <+> ppr eq
 pprO AnnOrigin             = ptext (sLit "an annotation")