Comments (3)
Can you please try setting {-# OPTIONS_GHC -fno-cse #-}
at the top of the file - does that fix it?
from cmdargs.
Yes it does. I guess I'll use it until I convert everything to the Explicit variant.
Thanks for the quick reply and the workaround. I now think I've seen the suggestion elsewhere, maybe by you on reddit or twitter or in the doc. Thanks!
from cmdargs.
It's worth noting that -fno-cse
doesn't help if the "config" type has strict fields, in which case the annotations are ignored again. For example, using the README's first example
{-# LANGUAGE DeriveDataTypeable #-}
{-# OPTIONS_GHC -fno-cse #-}
import System.Console.CmdArgs.Implicit
data Sample = Sample {hello :: !String} deriving (Show, Data, Typeable)
sample = Sample {
hello = def &= help "World argument" &= opt "world"
} &= summary "Sample v1"
main = print =<< cmdArgs sample
$ runghc Main.hs --help
Main.hs: System.Console.CmdArgs.Implicit, unexpected mode: FlagOptional "world"
from cmdargs.
Related Issues (20)
- expandArgsAt doesn't understand ~ HOT 1
- modeHelp eats blank lines HOT 1
- Generate help text if no default mode was specified HOT 2
- Wondering how to make a required argument. HOT 4
- A problem with common flags and multiple typFile resulting in "ITEM" HOT 4
- sudo-like cli: a way to instruct `cmdargs` to not look for flags in the remaining arguments HOT 2
- man and info generation
- Using `&= help` with `&= argPos` throws an error HOT 1
- Comments in args file HOT 5
- Default Lists?
- Running multiple sub-commands HOT 1
- Inconsistency in handling boolean arguments HOT 1
- Way to use multiple modes without partial record field selectors? HOT 2
- Tighter bounds base for old cmdargs HOT 1
- Is it possible to create arguments with only a single dash? HOT 1
- hidden arguments? HOT 6
- splitArgs: document quoting rules
- How can I customize --numeric-version? HOT 13
- Incorrect handling of subcommands with the same argument HOT 1
- ghc-9.6.1 runtime error HOT 1
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