% % (c) The GRASP/AQUA Project, Glasgow University, 1993-1998 % \section[GHC_Stats]{Statistics for per-module compilations} \begin{code}

    module HscStats ( ppSourceStats ) where

    #include "HsVersions.h"

    import HsSyn
    import Outputable
    import SrcLoc
    import Bag
    import Util
    import RdrName

    import Data.Char

\end{code} %************************************************************************ %* * \subsection{Statistics} %* * %************************************************************************ \begin{code}

    ppSourceStats :: Bool -> Located (HsModule RdrName) -> SDoc
    ppSourceStats short (L _ (HsModule _ exports imports ldecls _ _))
     = (if short then hcat else vcat)
            (map pp_val
    	       [("ExportAll        ", export_all), -- 1 if no export list
    		("ExportDecls      ", export_ds),
    		("ExportModules    ", export_ms),
    		("Imports          ", import_no),
    		("  ImpQual        ", import_qual),
    		("  ImpAs          ", import_as),
    		("  ImpAll         ", import_all),
    		("  ImpPartial     ", import_partial),
    		("  ImpHiding      ", import_hiding),
    		("FixityDecls      ", fixity_sigs),
    		("DefaultDecls     ", default_ds),
    	      	("TypeDecls        ", type_ds),
    	      	("DataDecls        ", data_ds),
    	      	("NewTypeDecls     ", newt_ds),
    	      	("TypeFamilyDecls  ", type_fam_ds),
    	      	("FamilyInstDecls  ", fam_inst_ds),
    	      	("DataConstrs      ", data_constrs),
    		("DataDerivings    ", data_derivs),
    	      	("ClassDecls       ", class_ds),
    	      	("ClassMethods     ", class_method_ds),
    	      	("DefaultMethods   ", default_method_ds),
    	      	("InstDecls        ", inst_ds),
    	      	("InstMethods      ", inst_method_ds),
    	      	("InstType         ", inst_type_ds),
    	      	("InstData         ", inst_data_ds),
    	      	("TypeSigs         ", bind_tys),
    	      	("ValBinds         ", val_bind_ds),
    	      	("FunBinds         ", fn_bind_ds),
    	      	("InlineMeths      ", method_inlines),
    		("InlineBinds      ", bind_inlines),
    --	      	("SpecialisedData  ", data_specs),
    --	      	("SpecialisedInsts ", inst_specs),
    	      	("SpecialisedMeths ", method_specs),
    	      	("SpecialisedBinds ", bind_specs)
    	       ])
      where
        decls = map unLoc ldecls

        pp_val (_, 0) = empty
        pp_val (str, n)
          | not short   = hcat [text str, int n]
          | otherwise   = hcat [text (trim str), equals, int n, semi]

        trim ls     = takeWhile (not.isSpace) (dropWhile isSpace ls)

        (fixity_sigs, bind_tys, bind_specs, bind_inlines)
    	= count_sigs [d | SigD d <- decls]
    		-- NB: this omits fixity decls on local bindings and
    		-- in class decls.  ToDo

        tycl_decls  = [d | TyClD d <- decls]
        (class_ds, type_ds, data_ds, newt_ds, type_fam_ds, fam_inst_ds) =
          countTyClDecls tycl_decls

        inst_decls  = [d | InstD d <- decls]
        inst_ds     = length inst_decls
        default_ds  = count (\ x -> case x of { DefD{} -> True; _ -> False}) decls
        val_decls   = [d | ValD d <- decls]

        real_exports = case exports of { Nothing -> []; Just es -> es }
        n_exports  	 = length real_exports
        export_ms  	 = count (\ e -> case unLoc e of { IEModuleContents{} -> True;_ -> False})
                             real_exports
        export_ds  	 = n_exports - export_ms
        export_all 	 = case exports of { Nothing -> 1; _ -> 0 }

        (val_bind_ds, fn_bind_ds)
    	= foldr add2 (0,0) (map count_bind val_decls)

        (import_no, import_qual, import_as, import_all, import_partial, import_hiding)
    	= foldr add6 (0,0,0,0,0,0) (map import_info imports)
        (data_constrs, data_derivs)
    	= foldr add2 (0,0) (map data_info tycl_decls)
        (class_method_ds, default_method_ds)
    	= foldr add2 (0,0) (map class_info tycl_decls)
        (inst_method_ds, method_specs, method_inlines, inst_type_ds, inst_data_ds)
    	= foldr add5 (0,0,0,0,0) (map inst_info inst_decls)

        count_bind (PatBind { pat_lhs = L _ (VarPat _) }) = (1,0)
        count_bind (PatBind {})                           = (0,1)
        count_bind (FunBind {})                           = (0,1)
        count_bind b = pprPanic "count_bind: Unhandled binder" (ppr b)

        count_sigs sigs = foldr add4 (0,0,0,0) (map sig_info sigs)

        sig_info (FixSig _)		= (1,0,0,0)
        sig_info (TypeSig _ _)      = (0,1,0,0)
        sig_info (SpecSig _ _ _)    = (0,0,1,0)
        sig_info (InlineSig _ _)    = (0,0,0,1)
        sig_info _                  = (0,0,0,0)

        import_info (L _ (ImportDecl _ _ _ qual as spec))
    	= add6 (1, qual_info qual, as_info as, 0,0,0) (spec_info spec)
        qual_info False  = 0
        qual_info True   = 1
        as_info Nothing  = 0
        as_info (Just _) = 1
        spec_info Nothing 	        = (0,0,0,1,0,0)
        spec_info (Just (False, _)) = (0,0,0,0,1,0)
        spec_info (Just (True, _))  = (0,0,0,0,0,1)

        data_info (TyData {tcdCons = cs, tcdDerivs = derivs})
    	= (length cs, case derivs of Nothing -> 0
    				     Just ds -> length ds)
        data_info _ = (0,0)

        class_info decl@(ClassDecl {})
    	= case count_sigs (map unLoc (tcdSigs decl)) of
    	    (_,classops,_,_) ->
    	       (classops, addpr (foldr add2 (0,0) (map (count_bind.unLoc) (bagToList (tcdMeths decl)))))
        class_info _ = (0,0)

        inst_info (InstDecl _ inst_meths inst_sigs ats)
    	= case count_sigs (map unLoc inst_sigs) of
    	    (_,_,ss,is) ->
    	      case foldr add2 (0, 0) (map (countATDecl . unLoc) ats) of
    	        (tyDecl, dtDecl) ->
    	          (addpr (foldr add2 (0,0)
    			   (map (count_bind.unLoc) (bagToList inst_meths))),
                       ss, is, tyDecl, dtDecl)
            where
    	  countATDecl (TyData    {}) = (0, 1)
    	  countATDecl (TySynonym {}) = (1, 0)
    	  countATDecl d              = pprPanic "countATDecl: Unhandled decl"
                                                (ppr d)

        addpr :: (Int,Int) -> Int
        add2  :: (Int,Int) -> (Int,Int) -> (Int, Int)
        add4  :: (Int,Int,Int,Int) -> (Int,Int,Int,Int) -> (Int, Int, Int, Int)
        add5  :: (Int,Int,Int,Int,Int) -> (Int,Int,Int,Int,Int) -> (Int, Int, Int, Int, Int)
        add6  :: (Int,Int,Int,Int,Int,Int) -> (Int,Int,Int,Int,Int,Int) -> (Int, Int, Int, Int, Int, Int)

        addpr (x,y) = x+y
        add2 (x1,x2) (y1,y2) = (x1+y1,x2+y2)
        add4 (x1,x2,x3,x4) (y1,y2,y3,y4) = (x1+y1,x2+y2,x3+y3,x4+y4)
        add5 (x1,x2,x3,x4,x5) (y1,y2,y3,y4,y5) = (x1+y1,x2+y2,x3+y3,x4+y4,x5+y5)
        add6 (x1,x2,x3,x4,x5,x6) (y1,y2,y3,y4,y5,y6) = (x1+y1,x2+y2,x3+y3,x4+y4,x5+y5,x6+y6)

\end{code}