70 lines
1.9 KiB
Haskell
70 lines
1.9 KiB
Haskell
{- This Source Code Form is subject to the terms of the Mozilla Public License,
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v. 2.0. If a copy of the MPL was not distributed with this file, You can
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obtain one at https://mozilla.org/MPL/2.0/. -}
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module Language.Elna.Driver.CommandLine
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( CommandLine(..)
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, IntermediateStage(..)
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, commandLine
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) where
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import Options.Applicative
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( Parser
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, ParserInfo(..)
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, argument
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, flag'
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, fullDesc
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, help
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, helper
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, info
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, long
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, metavar
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, optional
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, progDesc
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, short
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, str
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, strOption
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)
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import Control.Applicative (Alternative(..), (<**>))
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data IntermediateStage
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= ParseStage
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| ValidateStage
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| CodeGenStage
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deriving (Eq, Show)
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data CommandLine = CommandLine
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{ input :: FilePath
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, output :: Maybe FilePath
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, intermediateStage :: Maybe IntermediateStage
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} deriving (Eq, Show)
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intermediateStageP :: Parser IntermediateStage
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intermediateStageP
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= flag' ParseStage parseStageP
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<|> flag' ValidateStage validateStageP
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<|> flag' CodeGenStage codeGenStageP
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where
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parseStageP = long "parse"
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<> help "Run the lexer and parser, but stop before assembly generation"
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validateStageP = long "validate"
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<> help "Run through the semantic analysis stage, stopping before TAC generation"
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codeGenStageP = long "codegen"
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<> help "Perform lexing, parsing, and assembly generation, but stop before code emission"
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commandLineP :: Parser CommandLine
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commandLineP = CommandLine
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<$> argument str inFile
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<*> optional (strOption outFile)
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<*> optional intermediateStageP
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where
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inFile = metavar "INFILE" <> help "Input file."
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outFile = long "output"
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<> short 'o'
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<> metavar "OUTFILE"
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<> help "Output file."
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commandLine :: ParserInfo CommandLine
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commandLine = info (commandLineP <**> helper)
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$ fullDesc <> progDesc "Elna compiler."
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