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A basic infrastructure for generating Teyjus bytecode from the GF abstract syntax

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kr.angelov
2012-08-29 11:43:02 +00:00
parent 27196778ac
commit f8fe23fda7
23 changed files with 211 additions and 102 deletions
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30
src/runtime/haskell/PGF/Expr.hs
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@@ -318,22 +318,22 @@ data Value
| VClosure Env Expr
| VImplArg Value
type Sig = ( Map.Map CId (Type,Int,Maybe [Equation],Double) -- type and def of a fun
, Int -> Maybe Expr -- lookup for metavariables
type Sig = ( Map.Map CId (Type,Int,Maybe [Equation],Double,Int) -- type and def of a fun
, Int -> Maybe Expr -- lookup for metavariables
)
type Env = [Value]
eval :: Sig -> Env -> Expr -> Value
eval sig env (EVar i) = env !! i
eval sig env (EFun f) = case Map.lookup f (fst sig) of
Just (_,a,meqs,_) -> case meqs of
Just eqs -> if a == 0
then case eqs of
Equ [] e : _ -> eval sig [] e
_ -> VConst f []
else VApp f []
Nothing -> VApp f []
Nothing -> error ("unknown function "++showCId f)
Just (_,a,meqs,_,_) -> case meqs of
Just eqs -> if a == 0
then case eqs of
Equ [] e : _ -> eval sig [] e
_ -> VConst f []
else VApp f []
Nothing -> VApp f []
Nothing -> error ("unknown function "++showCId f)
eval sig env (EApp e1 e2) = apply sig env e1 [eval sig env e2]
eval sig env (EAbs b x e) = VClosure env (EAbs b x e)
eval sig env (EMeta i) = case snd sig i of
@@ -347,11 +347,11 @@ apply :: Sig -> Env -> Expr -> [Value] -> Value
apply sig env e [] = eval sig env e
apply sig env (EVar i) vs = applyValue sig (env !! i) vs
apply sig env (EFun f) vs = case Map.lookup f (fst sig) of
Just (_,a,meqs,_) -> case meqs of
Just eqs -> if a <= length vs
then match sig f eqs vs
else VApp f vs
Nothing -> VApp f vs
Just (_,a,meqs,_,_) -> case meqs of
Just eqs -> if a <= length vs
then match sig f eqs vs
else VApp f vs
Nothing -> VApp f vs
Nothing -> error ("unknown function "++showCId f)
apply sig env (EApp e1 e2) vs = apply sig env e1 (eval sig env e2 : vs)
apply sig env (EAbs b x e) (v:vs) = case (b,v) of