-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On 24/07/14 01:29, Andrew Pennebaker wrote:
Like many programming language environments, GHC offers a handy `-e` option for evaluating an expression, then returning to the shell.
$ ghc -e '2 + 2'
4
One would expect the interpreter, GHCi, to offer a similar flag, but it surprisingly rejects it.
ghci -e '2 + 2'
ghc: on the commandline: cannot use `--interactive' with `-e'
Usage: For basic information, try the `--help' option.
I think this behavior is quite unintuitive--when I pass `-e <exp>` to ghci, or pass `--interactive -e <exp>` to ghc, I expect the expression to be evaluated as the leading expression in an interactive interpreter session.
Could we please tweak ghc like this to make it slightly more intuitive when these flags are used together? Good idea! I'll look into it.
But did you mean to post this to the ghc-devs list? I've CC'd them with your entire email intact. Also, in case I forget all about this or fail, you should add a ticket to our Trac system[0]. That way, this won't get lost. Thanks! [0] https://ghc.haskell.org/trac/ghc/ - -- Alexander alexander@plaimi.net https://secure.plaimi.net/~alexander -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iF4EAREIAAYFAlPQxhUACgkQRtClrXBQc7XylgEAqbDrspchvHllACPf9lwrFTbN YenIDCggXbj98NJR5/8BAJUxpkej6T6QV4G+jk9R61nbUOEASEJ+0GBcHLBXpAsw =3/+R -----END PGP SIGNATURE-----