Commit a99906e5 authored by simonpj@microsoft.com's avatar simonpj@microsoft.com
Browse files

Print more nicely in -ddump-splices

When you say -ddump-splices, the "before" expression is now 

        *renamed* but not *typechecked"

Reason (a) less typechecking crap
       (b) data constructors after type checking have been
	   changed to their *wrappers*, and that makes them
	   print always fully qualified
parent 7a7a6356
......@@ -348,8 +348,7 @@ tcTopSplice expr res_ty = do
traceTc (text "Got result" <+> ppr expr2)
showSplice "expression"
zonked_q_expr (ppr expr2)
showSplice "expression" expr (ppr expr2)
-- Rename it, but bale out if there are errors
-- otherwise the type checker just gives more spurious errors
......@@ -489,7 +488,7 @@ runQuasiQuote (HsQuasiQuote _name quoter q_span quote) quote_selector desc meta_
; traceTc (text "About to run" <+> ppr zonked_q_expr)
; result <- runMetaQ convert zonked_q_expr
; traceTc (text "Got result" <+> ppr result)
; showSplice desc zonked_q_expr (ppr result)
; showSplice desc quoteExpr (ppr result)
; return result
}
......@@ -559,7 +558,7 @@ kcTopSpliceType expr
; traceTc (text "Got result" <+> ppr hs_ty2)
; showSplice "type" zonked_q_expr (ppr hs_ty2)
; showSplice "type" expr (ppr hs_ty2)
-- Rename it, but bale out if there are errors
-- otherwise the type checker just gives more spurious errors
......@@ -591,7 +590,7 @@ tcSpliceDecls expr
; traceTc (text "Got result" <+> vcat (map ppr decls))
; showSplice "declarations"
zonked_q_expr
expr
(ppr (getLoc expr) $$ (vcat (map ppr decls)))
; return decls }
\end{code}
......@@ -764,13 +763,18 @@ instance TH.Quasi (IOEnv (Env TcGblEnv TcLclEnv)) where
%************************************************************************
\begin{code}
showSplice :: String -> LHsExpr Id -> SDoc -> TcM ()
showSplice what before after = do
loc <- getSrcSpanM
traceSplice (vcat [ppr loc <> colon <+> text "Splicing" <+> text what,
showSplice :: String -> LHsExpr Name -> SDoc -> TcM ()
-- Note that 'before' is *renamed* but not *typechecked*
-- Reason (a) less typechecking crap
-- (b) data constructors after type checking have been
-- changed to their *wrappers*, and that makes them
-- print always fully qualified
showSplice what before after
= do { loc <- getSrcSpanM
; traceSplice (vcat [ppr loc <> colon <+> text "Splicing" <+> text what,
nest 2 (sep [nest 2 (ppr before),
text "======>",
nest 2 after])])
nest 2 after])]) }
illegalBracket :: ThStage -> SDoc
illegalBracket level
......
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