{-# OPTIONS -#include "Linker.h" #-}
-----------------------------------------------------------------------------
--- $Id: InteractiveUI.hs,v 1.170 2004/08/09 12:15:09 simonmar Exp $
+-- $Id: InteractiveUI.hs,v 1.171 2004/08/12 13:06:51 simonmar Exp $
--
-- GHC Interactive User Interface
--
shortHelpText = "use :? for help.\n"
-- NOTE: spaces at the end of each line to workaround CPP/string gap bug.
-helpText = "\
-\ Commands available from the prompt:\n\
-\\n\
-\ <stmt> evaluate/run <stmt>\n\
-\ :add <filename> ... add module(s) to the current target set\n\
-\ :browse [*]<module> display the names defined by <module>\n\
-\ :cd <dir> change directory to <dir>\n\
-\ :def <cmd> <expr> define a command :<cmd>\n\
-\ :help, :? display this list of commands\n\
-\ :info [<name> ...] display information about the given names\n\
-\ :load <filename> ... load module(s) and their dependents\n\
-\ :module [+/-] [*]<mod> ... set the context for expression evaluation\n\
-\ :reload reload the current module set\n\
-\\n\
-\ :set <option> ... set options\n\
-\ :set args <arg> ... set the arguments returned by System.getArgs\n\
-\ :set prog <progname> set the value returned by System.getProgName\n\
-\\n\
-\ :show modules show the currently loaded modules\n\
-\ :show bindings show the current bindings made at the prompt\n\
-\\n\
-\ :type <expr> show the type of <expr>\n\
-\ :kind <type> show the kind of <type>\n\
-\ :undef <cmd> undefine user-defined command :<cmd>\n\
-\ :unset <option> ... unset options\n\
-\ :quit exit GHCi\n\
-\ :!<command> run the shell command <command>\n\
-\\n\
-\ Options for `:set' and `:unset':\n\
-\\n\
-\ +r revert top-level expressions after each evaluation\n\
-\ +s print timing/memory stats after each evaluation\n\
-\ +t print type after evaluation\n\
-\ -<flags> most GHC command line flags can also be set here\n\
-\ (eg. -v2, -fglasgow-exts, etc.)\n\
-\"
+helpText =
+ " Commands available from the prompt:\n" ++
+ "\n" ++
+ " <stmt> evaluate/run <stmt>\n" ++
+ " :add <filename> ... add module(s) to the current target set\n" ++
+ " :browse [*]<module> display the names defined by <module>\n" ++
+ " :cd <dir> change directory to <dir>\n" ++
+ " :def <cmd> <expr> define a command :<cmd>\n" ++
+ " :help, :? display this list of commands\n" ++
+ " :info [<name> ...] display information about the given names\n" ++
+ " :load <filename> ... load module(s) and their dependents\n" ++
+ " :module [+/-] [*]<mod> ... set the context for expression evaluation\n" ++
+ " :reload reload the current module set\n" ++
+ "\n" ++
+ " :set <option> ... set options\n" ++
+ " :set args <arg> ... set the arguments returned by System.getArgs\n" ++
+ " :set prog <progname> set the value returned by System.getProgName\n" ++
+ "\n" ++
+ " :show modules show the currently loaded modules\n" ++
+ " :show bindings show the current bindings made at the prompt\n" ++
+ "\n" ++
+ " :type <expr> show the type of <expr>\n" ++
+ " :kind <type> show the kind of <type>\n" ++
+ " :undef <cmd> undefine user-defined command :<cmd>\n" ++
+ " :unset <option> ... unset options\n" ++
+ " :quit exit GHCi\n" ++
+ " :!<command> run the shell command <command>\n" ++
+ "\n" ++
+ " Options for ':set' and ':unset':\n" ++
+ "\n" ++
+ " +r revert top-level expressions after each evaluation\n" ++
+ " +s print timing/memory stats after each evaluation\n" ++
+ " +t print type after evaluation\n" ++
+ " -<flags> most GHC command line flags can also be set here\n" ++
+ " (eg. -v2, -fglasgow-exts, etc.)\n"
+
interactiveUI :: [FilePath] -> Maybe String -> IO ()
interactiveUI srcs maybe_expr = do
let (cmd,rest) = break isSpace str
cmds <- io (readIORef commands)
case [ (s,f) | (s,f) <- cmds, prefixMatch cmd s ] of
- [] -> io (hPutStr stdout ("unknown command `:" ++ cmd ++ "'\n"
+ [] -> io (hPutStr stdout ("unknown command ':" ++ cmd ++ "'\n"
++ shortHelpText) >> return False)
[(_,f)] -> f (dropWhile isSpace rest)
cs -> io (hPutStrLn stdout ("prefix " ++ cmd ++
foldr1 (\a b -> a ++ ',':b) (map fst cs)
++ ")") >> return False)
-noArgs c = throwDyn (CmdLineError ("command `" ++ c ++ "' takes no arguments"))
+noArgs c = throwDyn (CmdLineError ("command '" ++ c ++ "' takes no arguments"))
-----------------------------------------------------------------------------
help _ = io (putStr helpText)
info :: String -> GHCi ()
-info "" = throwDyn (CmdLineError "syntax: `:i <thing-you-want-info-about>'")
+info "" = throwDyn (CmdLineError "syntax: ':i <thing-you-want-info-about>'")
info s = do { let names = words s
; init_cms <- getCmState
; mapM_ (infoThing init_cms) names }
changeDirectory dir = do
state <- getGHCiState
when (targets state /= []) $
- io $ putStr "Warning: changing directory causes all loaded modules to be unloaded, \n\
- \because the search path has changed.\n"
+ io $ putStr "Warning: changing directory causes all loaded modules to be unloaded,\nbecause the search path has changed.\n"
cmstate1 <- io (cmUnload (cmstate state))
setGHCiState state{ cmstate = cmstate1, targets = [] }
setContextAfterLoad []
else do
if (macro_name `elem` map fst cmds)
then throwDyn (CmdLineError
- ("command `" ++ macro_name ++ "' is already defined"))
+ ("command '" ++ macro_name ++ "' is already defined"))
else do
-- give the expression a type signature, so we can be sure we're getting
cmds <- io (readIORef commands)
if (macro_name `elem` map fst builtin_commands)
then throwDyn (CmdLineError
- ("command `" ++ macro_name ++ "' cannot be undefined"))
+ ("command '" ++ macro_name ++ "' cannot be undefined"))
else do
if (macro_name `notElem` map fst cmds)
then throwDyn (CmdLineError
- ("command `" ++ macro_name ++ "' not defined"))
+ ("command '" ++ macro_name ++ "' not defined"))
else do
io (writeIORef commands (filter ((/= macro_name) . fst) cmds))
is_interpreted <- io (cmModuleIsInterpreted cms m)
when (not is_interpreted && not exports_only) $
- throwDyn (CmdLineError ("module `" ++ m ++ "' is not interpreted"))
+ throwDyn (CmdLineError ("module '" ++ m ++ "' is not interpreted"))
-- Temporarily set the context to the module we're interested in,
-- just so we can get an appropriate PrintUnqualified
separate cmstate (('*':m):ms) as bs = do
b <- io (cmModuleIsInterpreted cmstate m)
if b then separate cmstate ms (m:as) bs
- else throwDyn (CmdLineError ("module `" ++ m ++ "' is not interpreted"))
+ else throwDyn (CmdLineError ("module '" ++ m ++ "' is not interpreted"))
separate cmstate (m:ms) as bs = separate cmstate ms as (m:bs)
prel = "Prelude"
(plus_opts, rest2) = partition isPlus rest1
if (not (null rest2))
- then io (putStrLn ("unknown option: `" ++ head rest2 ++ "'"))
+ then io (putStrLn ("unknown option: '" ++ head rest2 ++ "'"))
else do
mapM_ unsetOpt plus_opts
setOpt ('+':str)
= case strToGHCiOpt str of
- Nothing -> io (putStrLn ("unknown option: `" ++ str ++ "'"))
+ Nothing -> io (putStrLn ("unknown option: '" ++ str ++ "'"))
Just o -> setOption o
unsetOpt ('+':str)
= case strToGHCiOpt str of
- Nothing -> io (putStrLn ("unknown option: `" ++ str ++ "'"))
+ Nothing -> io (putStrLn ("unknown option: '" ++ str ++ "'"))
Just o -> unsetOption o
strToGHCiOpt :: String -> (Maybe GHCiOption)
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