git.iko.soy/Idris-dev
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Idris-dev/src/Idris/Compiler.hs
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1{-# LANGUAGE PatternGuards #-}
3module Idris.Compiler where
5import Idris.AbsSyntax
7import Core.TT
8import Core.Evaluate
9import Core.CaseTree
11import Control.Monad.State
13import Epic.Epic hiding (Term, Type, Name, fn, compile)
14import qualified Epic.Epic as E
16primDefs = [UN "mkForeign", UN "FalseElim", UN "believe_me"]
18compile :: FilePath -> Idris ()
19compile f = do ds <- mkDecls
20 objs <- getObjectFiles
21 libs <- getLibs
22 hdrs <- getHdrs
23 let incs = map Include hdrs
24 lift $ compileObjWith [Debug] (mkProgram (incs ++ ds)) (f ++ ".o")
25 lift $ link ((f ++ ".o") : objs ++ (map ("-l"++) libs)) f
27mkDecls :: Idris [EpicDecl]
28mkDecls = do i <- getIState
29 decls <- mapM build (toAlist (tt_ctxt i))
30 return $ basic_defs ++ EpicFn (name "main") epicMain : decls
32ename x = name ("idris_" ++ show x)
33aname x = name ("a_" ++ show x)
35epicMain = effect_ $ ref (ename (UN "run__IO")) @@
36 ref (ename (UN "main"))
38class ToEpic a where
39 epic :: a -> Idris E.Term
41build :: (Name, Def) -> Idris EpicDecl
42build (n, d) = do i <- getIState
43 case lookup n (idris_prims i) of
44 Just opDef -> return $ EpicFn (ename n) opDef
45 _ -> do def <- epic d
46 logLvl 3 $ "Compiled " ++ show n ++ " =\n\t" ++ show def
47 return $ EpicFn (ename n) def
49impossible = int 42424242
51instance ToEpic Def where
52 epic (Function (Fun _ _ tm _)) = epic tm
53 epic (CaseOp _ _ pats args sc) = epic (args, sc) -- TODO: redo case comp after optimising
54 epic _ = return impossible
56instance ToEpic (TT Name) where
57 epic tm = epic' [] tm where
58 epic' env tm@(App f a)
59 | (P _ (UN "mkForeign") _, args) <- unApply tm
60 = doForeign args
61 | (P _ (UN "lazy") _, [_, arg]) <- unApply tm
62 = do arg' <- epic' env arg
63 return $ lazy_ arg'
64 | (P _ (UN "believe_me") _, [_, _, arg]) <- unApply tm
65 = epic' env arg
66 epic' env (P (DCon t a) n _) = return $ con_ t
67 epic' env (P (TCon t a) n _) = return $ con_ t
68 epic' env (P _ n _) = return $ ref (ename n)
69 epic' env (V i) = return $ ref (env!!i)
70 epic' env (Bind n (Lam _) sc)
71 = do sc' <- epic' (aname n : env) sc
72 return $ term ([aname n], sc')
73 epic' env (Bind n (Let _ v) sc)
74 = do sc' <- epic' (aname n : env) sc
75 v' <- epic' env v
76 return $ let_ v' (aname n, sc')
77 epic' env (Bind _ _ _) = return impossible
78 epic' env (App f a) = do f' <- epic' env f
79 a' <- epic' env a
80 return (f' @@ a')
81 epic' env (Constant c) = epic c
82 epic' env (Set _) = return impossible
84doForeign :: [TT Name] -> Idris E.Term
85doForeign (_ : fgn : args)
86 | (_, (Constant (Str fgnName) : fgnArgTys : P _ (UN ret) _ : [])) <- unApply fgn
87 = let tys = getFTypes fgnArgTys
88 rty = mkEty ret in
89 do args' <- mapM epic args
90 -- wrap it in a prim__IO
91 return $ con_ 0 @@ impossible @@ foreign_ rty fgnName (zip args' tys)
92 | otherwise = fail "Badly formed foreign function call"
94getFTypes :: TT Name -> [E.Type]
95getFTypes tm = case unApply tm of
96 (nil, [arg]) -> []
97 (cons, [a, (P _ (UN ty) _), xs]) ->
98 let rest = getFTypes xs in
99 mkEty ty : rest
101mkEty "FInt" = tyInt
102mkEty "FFloat" = tyFloat
103mkEty "FChar" = tyChar
104mkEty "FString" = tyString
105mkEty "FPtr" = tyPtr
106mkEty "FUnit" = tyUnit
108instance ToEpic Const where
109 epic (I i) = return (int i)
110 epic (BI i) = return (bigint i)
111 epic (Fl f) = return (float f)
112 epic (Str s) = return (str s)
113 epic (Ch c) = return (char c)
114 epic IType = return $ con_ 1
115 epic FlType = return $ con_ 2
116 epic ChType = return $ con_ 3
117 epic StrType = return $ con_ 4
118 epic PtrType = return $ con_ 5
119 epic BIType = return $ con_ 6
121instance ToEpic ([Name], SC) where
122 epic (args, tree) = do logLvl 3 $ "Compiling " ++ show args ++ "\n" ++ show tree
123 tree' <- epic tree
124 return $ term (map ename args, tree')
126instance ToEpic SC where
127 epic (STerm t) = epic t
128 epic (UnmatchedCase str) = return $ error_ str
129 epic (Case n alts) = do alts' <- mapM mkEpicAlt alts
130 return $ case_ (ref (ename n)) alts'
131 where
132 mkEpicAlt (ConCase n t args rhs) = do rhs' <- epic rhs
133 return $ con t (map ename args, rhs')
134 mkEpicAlt (ConstCase (I i) rhs) = do rhs' <- epic rhs
135 return $ constcase i rhs'
136 mkEpicAlt (ConstCase IType rhs) = do rhs' <- epic rhs
137 return $ defaultcase rhs'
138 mkEpicAlt (ConstCase c rhs)
139 = fail $ "Can only pattern match on integer constants (" ++ show c ++ ")"
140 mkEpicAlt (DefaultCase rhs) = do rhs' <- epic rhs
141 return $ defaultcase rhs'