collectMonoBinders, andMonoBindList, andMonoBinds
)
import RnHsSyn ( RenamedHsBinds, RenamedSig, RenamedMonoBinds )
-import TcHsSyn ( TcHsBinds, TcMonoBinds, TcId, zonkId )
+import TcHsSyn ( TcHsBinds, TcMonoBinds, TcId, zonkId, mkHsLet )
import TcMonad
import Inst ( Inst, LIE, emptyLIE, mkLIE, plusLIE, plusLIEs, InstOrigin(..),
tcLookupTyCon,
tcGetGlobalTyVars, tcExtendGlobalTyVars
)
-import TcSimplify ( tcSimplify, tcSimplifyAndCheck )
+import TcSimplify ( tcSimplify, tcSimplifyAndCheck, tcSimplifyToDicts )
import TcMonoType ( tcHsType, checkSigTyVars,
TcSigInfo(..), tcTySig, maybeSig, sigCtxt
)
-- the spec-pragma-id at the same time
tcExpr (HsVar name) sig_ty `thenTc` \ (spec_expr, spec_lie) ->
+ -- Squeeze out any Methods (see comments with tcSimplifyToDicts)
+ tcSimplifyToDicts spec_lie `thenTc` \ (spec_lie1, spec_binds) ->
+
-- Just specialise "f" by building a SpecPragmaId binding
-- It is the thing that makes sure we don't prematurely
-- dead-code-eliminate the binding we are really interested in.
-- Do the rest and combine
tcSpecSigs sigs `thenTc` \ (binds_rest, lie_rest) ->
- returnTc (binds_rest `andMonoBinds` VarMonoBind spec_id spec_expr,
- lie_rest `plusLIE` spec_lie)
+ returnTc (binds_rest `andMonoBinds` VarMonoBind spec_id (mkHsLet spec_binds spec_expr),
+ lie_rest `plusLIE` spec_lie1)
tcSpecSigs (other_sig : sigs) = tcSpecSigs sigs
tcSpecSigs [] = returnTc (EmptyMonoBinds, emptyLIE)