import {-# SOURCE #-} Match ( matchSinglePat )
import HsSyn ( Stmt(..), HsExpr(..), GRHSs(..), GRHS(..), HsMatchContext(..) )
-import TcHsSyn ( TypecheckedGRHSs, TypecheckedPat, TypecheckedStmt )
+import TcHsSyn ( TypecheckedGRHSs, TypecheckedPat, TypecheckedStmt, TypecheckedMatchContext )
import CoreSyn ( CoreExpr )
import Type ( Type )
In contrast, @dsGRHSs@ produces a @MatchResult@.
\begin{code}
-dsGRHSs :: HsMatchContext -> [TypecheckedPat] -- These are to build a MatchContext from
- -> TypecheckedGRHSs -- Guarded RHSs
+dsGRHSs :: TypecheckedMatchContext -> [TypecheckedPat] -- These are to build a MatchContext from
+ -> TypecheckedGRHSs -- Guarded RHSs
-> DsM (Type, MatchResult)
-dsGRHSs kind pats (GRHSs grhss binds (Just ty))
+dsGRHSs kind pats (GRHSs grhss binds ty)
= mapDs (dsGRHS kind pats) grhss `thenDs` \ match_results ->
let
match_result1 = foldr1 combineMatchResults match_results
-> DsMatchContext -- Context
-> DsM MatchResult
--- See comments with HsExpr.HsStmt re what an ExprStmt means
+-- See comments with HsExpr.Stmt re what an ExprStmt means
-- Here we must be in a guard context (not do-expression, nor list-comp)
matchGuard [ResultStmt expr locn] ctx
-- ExprStmts must be guards
-- Turn an "otherwise" guard is a no-op
-matchGuard (ExprStmt (HsVar v) _ : stmts) ctx
+matchGuard (ExprStmt (HsVar v) _ _ : stmts) ctx
| v `hasKey` otherwiseIdKey
|| v `hasKey` trueDataConKey
= matchGuard stmts ctx
-matchGuard (ExprStmt expr locn : stmts) ctx
+matchGuard (ExprStmt expr _ locn : stmts) ctx
= matchGuard stmts ctx `thenDs` \ match_result ->
putSrcLocDs locn (dsExpr expr) `thenDs` \ pred_expr ->
returnDs (mkGuardedMatchResult pred_expr match_result)