blob: a17a85c8650a846ba83fb8348ae8b49e02531f82 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
module Frontend where
import Builtins
import qualified Code
import qualified Compiler as C
import Control.Monad.IO.Class
import Control.Monad.Trans.Class
import Control.Monad.Trans.State.Lazy
import Data.Foldable (traverse_)
import qualified Data.Map as M
import Env
import qualified IR
import qualified Interpreter as I
import qualified Parser as P
import System.Console.Haskeline
import qualified Text.Megaparsec as MP
import Text.Pretty.Simple
ppr :: Show a => a -> PrlgEnv ()
ppr x =
liftIO $
pPrintOpt
CheckColorTty
defaultOutputOptionsDarkBg
{ outputOptionsCompactParens = True
, outputOptionsIndentAmount = 2
, outputOptionsPageWidth = 80
}
x
interpret :: String -> PrlgEnv Bool
interpret = (>> return True) . lex
where
lex input = do
case MP.parse P.lexPrlg "-" input of
Left bundle -> liftIO $ putStr (MP.errorBundlePretty bundle)
Right toks -> parse toks
parse toks = do
case MP.parse P.parsePrlg "-" toks of
Left bundle -> liftIO $ putStr (MP.errorBundlePretty bundle)
Right asts -> traverse_ shunt asts
shunt ast = do
o <- gets ops
case P.shuntPrlg o ast of
Left err -> liftIO $ putStrLn $ "expression parsing: " ++ err
Right prlg -> intern prlg
intern prlgs = do
prlgi <- withStrTable $ \st -> C.internPrlg (C.varnames prlgs) st prlgs
compile prlgi
compile prlgi
{- TODO: switch between prove goal/compile clause here -}
= do
commaId <- findStruct "," 2
let code = C.seqGoals $ C.compileGoals commaId prlgi
execute code
execute code = do
ds <- gets defs
let (_, res) = I.prove code ds
case res of
Left err -> liftIO $ putStrLn err
Right res ->
liftIO $
putStrLn $
if res
then "yes."
else "no proof."
interpreterStart :: PrlgEnv ()
interpreterStart = do
addBuiltins
interpreterLoop
interpreterLoop :: PrlgEnv ()
interpreterLoop = do
minput <- lift $ getInputLine "prlg> "
case minput of
Nothing -> return ()
Just input -> do
continue <- interpret input
if continue
then interpreterLoop
else return ()
interpreter :: InputT IO ()
interpreter =
evalStateT
interpreterStart
(PrlgState {defs = M.empty, ops = [], strtable = IR.emptystrtable})
|
