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factor opts out of main

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This commit is contained in:
Ayman Nadeem 2019-10-03 18:11:28 -04:00
parent 29e8048785
commit d8757e898c
1 changed files with 8 additions and 8 deletions
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16
semantic-ast/src/CLI.hs
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@ -13,6 +13,14 @@ import System.IO (FilePath)
import Options.Applicative hiding (style)
import Data.Semigroup ((<>))
main :: IO ()
main = generateAST =<< execParser opts
opts :: ParserInfo SemanticAST
opts = info (parseAST <**> helper)
( fullDesc
<> progDesc "Read a file, output an AST"
<> header "semantic-ast - generates ASTs" )
data SemanticAST = SemanticAST
{ sourceFilePath :: Prelude.String
, format :: Prelude.String
@ -28,14 +36,6 @@ parseAST = SemanticAST
( long "format"
<> help "Specify format --json --sexpression --show" )
main :: IO ()
main = generateAST =<< execParser opts
where
opts = info (parseAST <**> helper)
( fullDesc
<> progDesc "Read a file, output an AST"
<> header "semantic-ast - generates ASTs" )
generateAST :: SemanticAST -> IO ()
generateAST (SemanticAST file _) = do
bytestring <- Data.ByteString.readFile file