Default module header `module Main where`

[Iavor Diatchki]

That seems fairly reasonable to me.

-Iavor

On Tue, May 16, 2017 at 7:18 AM, Joachim Breitner <mail at joachim-breitner.de>
wrote:

> Hi,
>
> a very small proposal to be considered for Haskell':
>
> Currently, the report states
>
>     An abbreviated form of module, consisting only of the module body,
>     is permitted. If this is used, the header is assumed to be ‘module
>     Main(main) where’.
>
> I propose to change that to
>
>     An abbreviated form of module, consisting only of the module body,
>     is permitted. If this is used, the header is assumed to be ‘module
>     Main where’.
>
> The rationale is that a main-less main module is still useful, e.g.
> when you are working a lot in GHCi, and offload a few extensions to a
> separate file. Currently, tools like hdevtools will complain about a
> missing main function when editing such a file.
>
> It would also work better with GHC’s -main-is flag, and avoid problems
> like the one described in https://ghc.haskell.org/trac/ghc/ticket/13704
>
>
> I don’t see any downsides. When compiling to a binary, implementations
> are still able to detect that a Main module is not imported by any
> other module and only the main function is used, and optimize as if
> only main were exported.
>
> Greetings,
> Joachim
>
>
>
> --
> Joachim “nomeata” Breitner
>   mail at joachim-breitner.de • https://www.joachim-breitner.de/
>   XMPP: nomeata at joachim-breitner.de • OpenPGP-Key: 0xF0FBF51F
>   Debian Developer: nomeata at debian.org
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