diff options
Diffstat (limited to 'compiler/GHC/Driver/Session.hs')
| -rw-r--r-- | compiler/GHC/Driver/Session.hs | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/compiler/GHC/Driver/Session.hs b/compiler/GHC/Driver/Session.hs index 836ad88005..19b874dcf7 100644 --- a/compiler/GHC/Driver/Session.hs +++ b/compiler/GHC/Driver/Session.hs @@ -4467,12 +4467,11 @@ setCallerCcFilters arg = setMainIs :: String -> DynP () setMainIs arg - | not (null main_fn) && isLower (head main_fn) - -- The arg looked like "Foo.Bar.baz" + | x:_ <- main_fn, isLower x -- The arg looked like "Foo.Bar.baz" = upd $ \d -> d { mainFunIs = Just main_fn, mainModuleNameIs = mkModuleName main_mod } - | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar" + | x:_ <- arg, isUpper x -- The arg looked like "Foo" or "Foo.Bar" = upd $ \d -> d { mainModuleNameIs = mkModuleName arg } | otherwise -- The arg looked like "baz" |