diff options
| author | kr.angelov <kr.angelov@gmail.com> | 2012-08-29 11:43:02 +0000 |
|---|---|---|
| committer | kr.angelov <kr.angelov@gmail.com> | 2012-08-29 11:43:02 +0000 |
| commit | f8fe23fda7b97d5301bfb2ec1d89ce9967c5b200 (patch) | |
| tree | a2db1d1dbe1cd294a7f323abb0123ea8c551fc82 /src/runtime/haskell/PGF/Expr.hs | |
| parent | 27196778ace6de265407947a21a5b0eb3fd0caf8 (diff) | |
A basic infrastructure for generating Teyjus bytecode from the GF abstract syntax
Diffstat (limited to 'src/runtime/haskell/PGF/Expr.hs')
| -rw-r--r-- | src/runtime/haskell/PGF/Expr.hs | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/src/runtime/haskell/PGF/Expr.hs b/src/runtime/haskell/PGF/Expr.hs index 5fbcdf120..998819687 100644 --- a/src/runtime/haskell/PGF/Expr.hs +++ b/src/runtime/haskell/PGF/Expr.hs @@ -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
|