blob: a51743e2c1fa9620fd714c3b2c140e3bd07eb436 (
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
|
{-|
Module : VeriFuzz.Config
Description : Configuration file format and parser.
Copyright : (c) 2019, Yann Herklotz Grave
License : GPL-3
Maintainer : ymherklotz [at] gmail [dot] com
Stability : experimental
Portability : POSIX
Configuration file format and parser.
-}
{-# LANGUAGE TemplateHaskell #-}
module VeriFuzz.Config
( Config(..)
, Probability(..)
, probAssign
, probAlways
, configProbability
, parseConfigFile
)
where
import Control.Applicative (Alternative)
import Control.Lens hiding ((.=))
import Data.Maybe (fromMaybe)
import Toml (TomlCodec, (.=))
import qualified Toml
data Probability = Probability { _probAssign :: {-# UNPACK #-} !Int
, _probAlways :: {-# UNPACK #-} !Int
}
deriving (Eq, Show)
makeLenses ''Probability
newtype Config = Config { _configProbability :: Probability }
deriving (Eq, Show)
makeLenses ''Config
defaultValue
:: (Alternative r, Applicative w) =>
b -> Toml.Codec r w a b -> Toml.Codec r w a b
defaultValue x = Toml.dimap Just (fromMaybe x) . Toml.dioptional
probCodec :: TomlCodec Probability
probCodec = Probability
<$> Toml.int "assign" .= _probAssign
<*> defaultValue 1 (Toml.int "always") .= _probAlways
configCodec :: TomlCodec Config
configCodec = Toml.dimap _configProbability Config $ Toml.table probCodec "probability"
parseConfigFile :: FilePath -> IO Config
parseConfigFile = Toml.decodeFile configCodec
|
