forked from GitHub/gf-core
54 lines
1012 B
Haskell
54 lines
1012 B
Haskell
module GF.Command.Abstract where
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import PGF.Data
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type Ident = String
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type CommandLine = [Pipe]
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type Pipe = [Command]
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data Command
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= Command Ident [Option] Argument
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deriving (Eq,Ord,Show)
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data Option
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= OOpt Ident
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| OFlag Ident Value
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deriving (Eq,Ord,Show)
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data Value
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= VId Ident
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| VInt Integer
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deriving (Eq,Ord,Show)
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data Argument
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= AExp Exp
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| ANoArg
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deriving (Eq,Ord,Show)
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valIdOpts :: String -> String -> [Option] -> String
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valIdOpts flag def opts = case valOpts flag (VId def) opts of
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VId v -> v
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_ -> def
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valIntOpts :: String -> Integer -> [Option] -> Int
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valIntOpts flag def opts = fromInteger $ case valOpts flag (VInt def) opts of
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VInt v -> v
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_ -> def
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valOpts :: String -> Value -> [Option] -> Value
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valOpts flag def opts = case lookup flag flags of
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Just v -> v
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_ -> def
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where
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flags = [(f,v) | OFlag f v <- opts]
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isOpt :: String -> [Option] -> Bool
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isOpt o opts = elem o [x | OOpt x <- opts]
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prOpt :: Option -> String
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prOpt (OOpt i) = i ----
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