2 % (c) The AQUA Project, Glasgow University, 1996
4 \section[PprEnv]{The @PprEnv@ type}
7 #include "HsVersions.h"
14 pCon, pLit, pMajBndr, pMinBndr, pOcc, pPrim, pSCC, pStyle,
15 pTy, pTyVarB, pTyVarO, pUVar, pUse,
18 SYN_IE(NmbrM), initNmbr,
20 mapNmbr, mapAndUnzipNmbr
21 -- nmbr1, nmbr2, nmbr3
22 -- rnumValVar, rnumTyVar, rnumUVar,
23 -- lookupValVar, lookupTyVar, lookupUVar
30 import Unique ( initRenumberingUniques, Unique )
31 import UniqFM ( emptyUFM, UniqFM )
33 #if __GLASGOW_HASKELL__ >= 202
34 IMPORT_DELOOPER(TyLoop)
35 import Outputable ( PprStyle )
36 import Literal ( Literal )
37 import Usage ( GenUsage, SYN_IE(Usage) )
38 import {-# SOURCE #-} PrimOp (PrimOp)
39 import {-# SOURCE #-} CostCentre ( CostCentre )
44 For tyvars and uvars, we {\em do} normally use these homogenized
45 names; for values, we {\em don't}. In printing interfaces, though,
46 we use homogenized value names, so that interfaces don't wobble
47 uncontrollably from changing Unique-based names.
50 data PprEnv tyvar uvar bndr occ
51 = PE PprStyle -- stored for safe keeping
53 (Literal -> Doc) -- Doing these this way saves
54 (Id -> Doc) -- carrying around a PprStyle
58 (tyvar -> Doc) -- to print tyvar binders
59 (tyvar -> Doc) -- to print tyvar occurrences
61 (uvar -> Doc) -- to print usage vars
63 (bndr -> Doc) -- to print "major" val_bdrs
64 (bndr -> Doc) -- to print "minor" val_bdrs
65 (occ -> Doc) -- to print bindees
67 (GenType tyvar uvar -> Doc)
68 (GenUsage uvar -> Doc)
74 -> Maybe (Literal -> Doc)
76 -> Maybe (PrimOp -> Doc)
77 -> Maybe (CostCentre -> Doc)
78 -> Maybe (tyvar -> Doc)
79 -> Maybe (tyvar -> Doc)
80 -> Maybe (uvar -> Doc)
81 -> Maybe (bndr -> Doc)
82 -> Maybe (bndr -> Doc)
84 -> Maybe (GenType tyvar uvar -> Doc)
85 -> Maybe (GenUsage uvar -> Doc)
86 -> PprEnv tyvar uvar bndr occ
88 -- you can specify all the printers individually; if
89 -- you don't specify one, you get bottom
91 initPprEnv sty l d p c tvb tvo uv maj_bndr min_bndr occ ty use
106 demaybe Nothing = bottom
109 bottom = panic "PprEnv.initPprEnv: unspecified printing function"
112 initPprEnv sty pmaj pmin pocc
113 = PE (ppr sty) -- for a Literal
114 (ppr sty) -- for a DataCon
115 (ppr sty) -- for a PrimOp
116 (\ cc -> text (showCostCentre sty True cc)) -- CostCentre
118 (ppr sty) -- for a tyvar
119 (ppr sty) -- for a usage var
121 pmaj pmin pocc -- for GenIds in various guises
123 (ppr sty) -- for a Type
124 (ppr sty) -- for a Usage
129 pStyle (PE s _ _ _ _ _ _ _ _ _ _ _ _) = s
130 pLit (PE _ pp _ _ _ _ _ _ _ _ _ _ _) = pp
131 pCon (PE _ _ pp _ _ _ _ _ _ _ _ _ _) = pp
132 pPrim (PE _ _ _ pp _ _ _ _ _ _ _ _ _) = pp
133 pSCC (PE _ _ _ _ pp _ _ _ _ _ _ _ _) = pp
135 pTyVarB (PE _ _ _ _ _ pp _ _ _ _ _ _ _) = pp
136 pTyVarO (PE _ _ _ _ _ _ pp _ _ _ _ _ _) = pp
137 pUVar (PE _ _ _ _ _ _ _ pp _ _ _ _ _) = pp
139 pMajBndr (PE _ _ _ _ _ _ _ _ pp _ _ _ _) = pp
140 pMinBndr (PE _ _ _ _ _ _ _ _ _ pp _ _ _) = pp
141 pOcc (PE _ _ _ _ _ _ _ _ _ _ pp _ _) = pp
143 pTy (PE _ _ _ _ _ _ _ _ _ _ _ pp _) = pp
144 pUse (PE _ _ _ _ _ _ _ _ _ _ _ _ pp) = pp
147 We tend to {\em renumber} everything before printing, so that
148 we get consistent Uniques on everything from run to run.
151 = NmbrEnv Unique -- next "Unique" to give out for a value
152 Unique -- ... for a tyvar
153 Unique -- ... for a usage var
154 (UniqFM Id) -- mapping for value vars we know about
155 (UniqFM TyVar) -- ... for tyvars
156 (UniqFM Unique{-UVar-}) -- ... for usage vars
158 type NmbrM a = NmbrEnv -> (NmbrEnv, a)
160 initNmbr :: NmbrM a -> a
163 (v1,t1,u1) = initRenumberingUniques
164 init_nmbr_env = NmbrEnv v1 t1 u1 emptyUFM emptyUFM emptyUFM
166 snd (m init_nmbr_env)
168 returnNmbr x nenv = (nenv, x)
172 (nenv2, res) = m nenv
176 mapNmbr f [] = returnNmbr []
178 = f x `thenNmbr` \ r ->
179 mapNmbr f xs `thenNmbr` \ rs ->
182 mapAndUnzipNmbr f [] = returnNmbr ([],[])
183 mapAndUnzipNmbr f (x:xs)
184 = f x `thenNmbr` \ (r1, r2) ->
185 mapAndUnzipNmbr f xs `thenNmbr` \ (rs1, rs2) ->
186 returnNmbr (r1:rs1, r2:rs2)
191 (nenv1, new_x1) = x1 nenv
193 (nenv1, thing new_x1)
195 nmbr2 nenv thing x1 x2
197 (nenv1, new_x1) = x1 nenv
198 (nenv2, new_x2) = x2 nenv1
200 (nenv2, thing new_x1 new_x2)
202 nmbr3 nenv thing x1 x2 x3
204 (nenv1, new_x1) = x1 nenv
205 (nenv2, new_x2) = x2 nenv1
206 (nenv3, new_x3) = x3 nenv2
208 (nenv3, thing new_x1 new_x2 new_x3)
211 rnumValVar = panic "rnumValVar"
212 rnumTyVar = panic "rnumTyVar"
213 rnumUVar = panic "rnumUVar"
214 lookupValVar = panic "lookupValVar"
215 lookupTyVar = panic "lookupTyVar"
216 lookupUVar = panic "lookupUVar"