\section[PprEnv]{The @PprEnv@ type}
\begin{code}
-#include "HsVersions.h"
-
module PprEnv (
- PprEnv{-abstract-},
+ PprEnv{-abstract-},
+ BindingSite(..),
initPprEnv,
- pCon, pLit, pMajBndr, pMinBndr, pOcc, pPrim, pSCC, pStyle,
- pTy, pTyVar, pUVar, pUse
+ pCon, pLit, pValBndr, pOcc, pPrim, pSCC,
+ pTy, pTyVarB, pTyVarO
+
) where
-import Ubiq{-uitous-}
+#include "HsVersions.h"
+
+import {-# SOURCE #-} Id ( Id )
+import {-# SOURCE #-} PrimOp ( PrimOp )
+import {-# SOURCE #-} CostCentre ( CostCentre )
-import Id ( DataCon(..) )
-import Pretty ( Pretty(..) )
-import Util ( panic )
+import Type ( GenType )
+import TyVar ( GenTyVar )
+import Literal ( Literal )
+import Outputable
+import Unique ( Unique )
+import UniqFM ( emptyUFM, UniqFM )
\end{code}
-For tyvars and uvars, we {\em do} normally use these homogenized
-names; for values, we {\em don't}. In printing interfaces, though,
-we use homogenized value names, so that interfaces don't wobble
-uncontrollably from changing Unique-based names.
+%************************************************************************
+%* *
+\subsection{Public interfaces for Core printing (excluding instances)}
+%* *
+%************************************************************************
\begin{code}
-data PprEnv tyvar uvar bndr occ
- = PE PprStyle -- stored for safe keeping
+data PprEnv flexi bndr occ
+ = PE (Literal -> SDoc)
+ (Id -> SDoc)
+ (PrimOp -> SDoc)
+ (CostCentre -> SDoc)
- (Literal -> Pretty) -- Doing these this way saves
- (DataCon -> Pretty) -- carrying around a PprStyle
- (PrimOp -> Pretty)
- (CostCentre -> Pretty)
+ (GenTyVar flexi -> SDoc) -- to print tyvar binders
+ (GenTyVar flexi -> SDoc) -- to print tyvar occurrences
+ (GenType flexi -> SDoc) -- to print types
- (tyvar -> Pretty) -- to print tyvars
- (uvar -> Pretty) -- to print usage vars
+ (BindingSite -> bndr -> SDoc) -- to print val_bdrs
+ (occ -> SDoc) -- to print bindees
- (bndr -> Pretty) -- to print "major" val_bdrs
- (bndr -> Pretty) -- to print "minor" val_bdrs
- (occ -> Pretty) -- to print bindees
+\end{code}
+
+@BindingSite@ is used to tell the thing that prints binder what
+language construct is binding the identifier.
- (GenType tyvar uvar -> Pretty)
- (GenUsage uvar -> Pretty)
+\begin{code}
+data BindingSite = LambdaBind | CaseBind | LetBind
\end{code}
\begin{code}
initPprEnv
- :: PprStyle
- -> Maybe (Literal -> Pretty)
- -> Maybe (DataCon -> Pretty)
- -> Maybe (PrimOp -> Pretty)
- -> Maybe (CostCentre -> Pretty)
- -> Maybe (tyvar -> Pretty)
- -> Maybe (uvar -> Pretty)
- -> Maybe (bndr -> Pretty)
- -> Maybe (bndr -> Pretty)
- -> Maybe (occ -> Pretty)
- -> Maybe (GenType tyvar uvar -> Pretty)
- -> Maybe (GenUsage uvar -> Pretty)
- -> PprEnv tyvar uvar bndr occ
+ :: Maybe (Literal -> SDoc)
+ -> Maybe (Id -> SDoc)
+ -> Maybe (PrimOp -> SDoc)
+ -> Maybe (CostCentre -> SDoc)
+ -> Maybe (GenTyVar flexi -> SDoc)
+ -> Maybe (GenTyVar flexi -> SDoc)
+ -> Maybe (GenType flexi -> SDoc)
+ -> Maybe (BindingSite -> bndr -> SDoc)
+ -> Maybe (occ -> SDoc)
+ -> PprEnv flexi bndr occ
-- you can specify all the printers individually; if
-- you don't specify one, you get bottom
-initPprEnv sty l d p c tv uv maj_bndr min_bndr occ ty use
- = PE sty
- (demaybe l)
+initPprEnv l d p c tvb tvo ty val_bndr occ
+ = PE (demaybe l)
(demaybe d)
(demaybe p)
(demaybe c)
- (demaybe tv)
- (demaybe uv)
- (demaybe maj_bndr)
- (demaybe min_bndr)
- (demaybe occ)
+ (demaybe tvb)
+ (demaybe tvo)
(demaybe ty)
- (demaybe use)
+ (demaybe val_bndr)
+ (demaybe occ)
where
demaybe Nothing = bottom
demaybe (Just x) = x
bottom = panic "PprEnv.initPprEnv: unspecified printing function"
-
-{-
-initPprEnv sty pmaj pmin pocc
- = PE (ppr sty) -- for a Literal
- (ppr sty) -- for a DataCon
- (ppr sty) -- for a PrimOp
- (\ cc -> ppStr (showCostCentre sty True cc)) -- CostCentre
-
- (ppr sty) -- for a tyvar
- (ppr sty) -- for a usage var
-
- pmaj pmin pocc -- for GenIds in various guises
-
- (ppr sty) -- for a Type
- (ppr sty) -- for a Usage
--}
\end{code}
\begin{code}
-pStyle (PE s _ _ _ _ _ _ _ _ _ _ _) = s
-pLit (PE _ pp _ _ _ _ _ _ _ _ _ _) = pp
-pCon (PE _ _ pp _ _ _ _ _ _ _ _ _) = pp
-pPrim (PE _ _ _ pp _ _ _ _ _ _ _ _) = pp
-pSCC (PE _ _ _ _ pp _ _ _ _ _ _ _) = pp
-
-pTyVar (PE _ _ _ _ _ pp _ _ _ _ _ _) = pp
-pUVar (PE _ _ _ _ _ _ pp _ _ _ _ _) = pp
-
-pMajBndr (PE _ _ _ _ _ _ _ pp _ _ _ _) = pp
-pMinBndr (PE _ _ _ _ _ _ _ _ pp _ _ _) = pp
-pOcc (PE _ _ _ _ _ _ _ _ _ pp _ _) = pp
-
-pTy (PE _ _ _ _ _ _ _ _ _ _ pp _) = pp
-pUse (PE _ _ _ _ _ _ _ _ _ _ _ pp) = pp
+pLit (PE pp _ _ _ _ _ _ _ _) = pp
+pCon (PE _ pp _ _ _ _ _ _ _) = pp
+pPrim (PE _ _ pp _ _ _ _ _ _) = pp
+pSCC (PE _ _ _ pp _ _ _ _ _) = pp
+
+pTyVarB (PE _ _ _ _ pp _ _ _ _) = pp
+pTyVarO (PE _ _ _ _ _ pp _ _ _) = pp
+pTy (PE _ _ _ _ _ _ pp _ _) = pp
+
+pValBndr (PE _ _ _ _ _ _ _ pp _) = pp
+pOcc (PE _ _ _ _ _ _ _ _ pp) = pp
\end{code}