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Added a simple (-h/--help) option for printing the Tock help

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Neil Brown 2008-02-24 12:15:39 +00:00
parent 6d9534f9b9
commit 062cd0415a
1 changed files with 4 additions and 0 deletions
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4
Main.hs
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@ -58,6 +58,7 @@ options =
[ Option [] ["mode"] (ReqArg optMode "MODE") "select mode (options: flowgraph, parse, compile, post-c, full)"
, Option [] ["backend"] (ReqArg optBackend "BACKEND") "code-generating backend (options: c, cppcsp, dumpast)"
, Option [] ["frontend"] (ReqArg optFrontend "FRONTEND") "language frontend (options: occam, rain)"
, Option ['h'] ["help"] (NoArg optPrintHelp) "print this help"
, Option ['v'] ["verbose"] (NoArg $ optVerbose) "be more verbose (use multiple times for more detail)"
, Option ['o'] ["output"] (ReqArg optOutput "FILE") "output file (default \"-\")"
, Option [] ["usage-checking"] (ReqArg optUsageChecking "SETTING") "usage checking (EXPERIMENTAL) (options: on, off)"
@ -98,6 +99,9 @@ optVerbose ps = return $ ps { csVerboseLevel = csVerboseLevel ps + 1 }
optOutput :: String -> OptFunc
optOutput s ps = return $ ps { csOutputFile = s }
optPrintHelp :: OptFunc
optPrintHelp _ = dieIO (Nothing, usageInfo "Usage: tock [OPTION...] SOURCEFILE" options)
optUsageChecking :: String -> OptFunc
optUsageChecking s ps
= do usageCheck <- case s of