import HsLit ( HsLit(..), HsOverLit )
import HsTypes ( LHsType, PostTcType )
import HsImpExp ( isOperator, pprHsVar )
-import HsBinds ( HsLocalBinds, DictBinds, ExprCoFn, isEmptyLocalBinds )
+import HsBinds ( HsLocalBinds, DictBinds, isEmptyLocalBinds,
+ HsWrapper, pprHsWrapper )
-- others:
-import Type ( Type, pprParendType )
-import Var ( TyVar, Id )
+import Var ( Id )
import Name ( Name )
import BasicTypes ( IPName, Boxity, tupleParens, Arity, Fixity(..) )
import SrcLoc ( Located(..), unLoc )
Everything from here on appears only in typechecker output.
\begin{code}
- | TyLam -- TRANSLATION
- [TyVar]
- (LHsExpr id)
- | TyApp -- TRANSLATION
- (LHsExpr id) -- generated by Spec
- [Type]
-
- -- DictLam and DictApp are "inverses"
- | DictLam
- [id]
- (LHsExpr id)
- | DictApp
- (LHsExpr id)
- [id]
-
- | HsCoerce ExprCoFn -- TRANSLATION
+ | HsWrap HsWrapper -- TRANSLATION
(HsExpr id)
type PendingSplice = (Name, LHsExpr Id) -- Typechecked splices, waiting to be
ppr_expr (HsIPVar v) = ppr v
ppr_expr (HsLit lit) = ppr lit
ppr_expr (HsOverLit lit) = ppr lit
+ppr_expr (HsPar e) = parens (ppr_lexpr e)
+
+ppr_expr (HsCoreAnn s e)
+ = vcat [ptext SLIT("HsCoreAnn") <+> ftext s, ppr_lexpr e]
ppr_expr (HsApp e1 e2)
= let (fun, args) = collect_args e1 [e2] in
- (ppr_lexpr fun) <+> (sep (map pprParendExpr args))
+ hang (ppr_lexpr fun) 2 (sep (map pprParendExpr args))
where
collect_args (L _ (HsApp fun arg)) args = collect_args fun (arg:args)
collect_args fun args = (fun, args)
pp_e2 = pprParendExpr e2
pp_prefixly
- = hang (ppr op) 4 (sep [pp_e1, pp_e2])
+ = hang (ppr op) 2 (sep [pp_e1, pp_e2])
pp_infixly v
- = sep [pp_e1, hsep [pprInfix v, pp_e2]]
+ = sep [nest 2 pp_e1, pprInfix v, nest 2 pp_e2]
ppr_expr (NegApp e _) = char '-' <+> pprParendExpr e
-ppr_expr (HsPar e) = parens (ppr_lexpr e)
-
ppr_expr (SectionL expr op)
= case unLoc op of
HsVar v -> pp_infixly v
ppr_expr (HsSCC lbl expr)
= sep [ ptext SLIT("_scc_") <+> doubleQuotes (ftext lbl), pprParendExpr expr ]
-ppr_expr (TyLam tyvars expr)
- = hang (hsep [ptext SLIT("/\\"),
- hsep (map (pprBndr LambdaBind) tyvars),
- ptext SLIT("->")])
- 4 (ppr_lexpr expr)
-
-ppr_expr (TyApp expr [ty])
- = hang (ppr_lexpr expr) 4 (pprParendType ty)
-
-ppr_expr (TyApp expr tys)
- = hang (ppr_lexpr expr)
- 4 (brackets (interpp'SP tys))
-
-ppr_expr (DictLam dictvars expr)
- = hang (hsep [ptext SLIT("\\{-dict-}"),
- hsep (map (pprBndr LambdaBind) dictvars),
- ptext SLIT("->")])
- 4 (ppr_lexpr expr)
-
-ppr_expr (DictApp expr [dname])
- = hang (ppr_lexpr expr) 4 (ppr dname)
-
-ppr_expr (DictApp expr dnames)
- = hang (ppr_lexpr expr)
- 4 (brackets (interpp'SP dnames))
-
-ppr_expr (HsCoerce co_fn e) = ppr_expr e
-
-ppr_expr (HsType id) = ppr id
+ppr_expr (HsWrap co_fn e) = pprHsWrapper (ppr_expr e) co_fn
+ppr_expr (HsType id) = ppr id
ppr_expr (HsSpliceE s) = pprSplice s
ppr_expr (HsBracket b) = pprHsBracket b
(GRHSs id)
matchGroupArity :: MatchGroup id -> Arity
+matchGroupArity (MatchGroup [] _)
+ = panic "matchGroupArity" -- MatchGroup is never empty
matchGroupArity (MatchGroup (match:matches) _)
= ASSERT( all ((== n_pats) . length . hsLMatchPats) matches )
-- Assertion just checks that all the matches have the same number of pats
\begin{code}
pprMatches :: (OutputableBndr id) => HsMatchContext id -> MatchGroup id -> SDoc
-pprMatches ctxt (MatchGroup matches _) = vcat (map (pprMatch ctxt) (map unLoc matches))
+pprMatches ctxt (MatchGroup matches ty) = vcat (map (pprMatch ctxt) (map unLoc matches))
+ -- Don't print the type; it's only
+ -- a place-holder before typechecking
-- Exported to HsBinds, which can't see the defn of HsMatchContext
pprFunBind :: (OutputableBndr id) => id -> MatchGroup id -> SDoc
pprStmt (RecStmt segment _ _ _ _) = ptext SLIT("rec") <+> braces (vcat (map ppr segment))
pprDo :: OutputableBndr id => HsStmtContext any -> [LStmt id] -> LHsExpr id -> SDoc
-pprDo DoExpr stmts body = hang (ptext SLIT("do")) 2 (vcat (map ppr stmts) $$ ppr body)
-pprDo (MDoExpr _) stmts body = hang (ptext SLIT("mdo")) 3 (vcat (map ppr stmts) $$ ppr body)
+pprDo DoExpr stmts body = ptext SLIT("do") <+> (vcat (map ppr stmts) $$ ppr body)
+pprDo (MDoExpr _) stmts body = ptext SLIT("mdo") <+> (vcat (map ppr stmts) $$ ppr body)
pprDo ListComp stmts body = pprComp brackets stmts body
pprDo PArrComp stmts body = pprComp pa_brackets stmts body
+pprDo other stmts body = panic "pprDo" -- PatGuard, ParStmtCxt
pprComp :: OutputableBndr id => (SDoc -> SDoc) -> [LStmt id] -> LHsExpr id -> SDoc
pprComp brack quals body
pprMatchContext ProcExpr = ptext SLIT("an arrow abstraction")
pprMatchContext (StmtCtxt ctxt) = ptext SLIT("a pattern binding in") $$ pprStmtContext ctxt
-pprMatchRhsContext (FunRhs fun) = ptext SLIT("a right-hand side of function") <+> quotes (ppr fun)
-pprMatchRhsContext CaseAlt = ptext SLIT("the body of a case alternative")
-pprMatchRhsContext PatBindRhs = ptext SLIT("the right-hand side of a pattern binding")
-pprMatchRhsContext LambdaExpr = ptext SLIT("the body of a lambda")
-pprMatchRhsContext ProcExpr = ptext SLIT("the body of a proc")
-pprMatchRhsContext RecUpd = panic "pprMatchRhsContext"
-
pprStmtContext (ParStmtCtxt c) = sep [ptext SLIT("a parallel branch of"), pprStmtContext c]
pprStmtContext (PatGuard ctxt) = ptext SLIT("a pattern guard for") $$ pprMatchContext ctxt
pprStmtContext DoExpr = ptext SLIT("a 'do' expression")
pprStmtContext ListComp = ptext SLIT("a list comprehension")
pprStmtContext PArrComp = ptext SLIT("an array comprehension")
+{-
+pprMatchRhsContext (FunRhs fun) = ptext SLIT("a right-hand side of function") <+> quotes (ppr fun)
+pprMatchRhsContext CaseAlt = ptext SLIT("the body of a case alternative")
+pprMatchRhsContext PatBindRhs = ptext SLIT("the right-hand side of a pattern binding")
+pprMatchRhsContext LambdaExpr = ptext SLIT("the body of a lambda")
+pprMatchRhsContext ProcExpr = ptext SLIT("the body of a proc")
+pprMatchRhsContext other = panic "pprMatchRhsContext" -- RecUpd, StmtCtxt
+
-- Used for the result statement of comprehension
-- e.g. the 'e' in [ e | ... ]
-- or the 'r' in f x = r
pprStmtResultContext (PatGuard ctxt) = pprMatchRhsContext ctxt
pprStmtResultContext other = ptext SLIT("the result of") <+> pprStmtContext other
-
+-}
-- Used to generate the string for a *runtime* error message
matchContextErrString (FunRhs fun) = "function " ++ showSDoc (ppr fun)
projects / ghc-hetmet.git / blobdiff