On Fri, Jan 04, 2008 at 09:33:40AM +, Simon Peyton-Jones wrote:
> | > The trouble is that 'error' calls an I/O function to print its message,
> and the I/O functions in turn depend
> | on a *lot* of stuff. So 'error' can be defined only when a lot of other
> functions have been defined.
>
>
| > The trouble is that 'error' calls an I/O function to print its message, and
the I/O functions in turn depend
| on a *lot* of stuff. So 'error' can be defined only when a lot of other
functions have been defined.
| Why is this necessary in post-exceptions Haskell? Can we not just have
| err
On Fri, Jan 04, 2008 at 09:12:20AM +, Simon Peyton-Jones wrote:
> The trouble is that 'error' calls an I/O function to print its message, and
> the I/O functions in turn depend on a *lot* of stuff. So 'error' can be
> defined only when a lot of other functions have been defined.
>
> But 'err
s of GHC.Err.
But remember that many of these modules are still compiled before GHC.Err.
Does that make sense?
Simon
| -Original Message-
| From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Neil Mitchell
| Sent: 31 December 2007 16:57
| To: cvs-ghc@haskell.org
| Su
Judah Jacobson wrote:
On Dec 31, 2007 11:57 AM, Neil Mitchell <[EMAIL PROTECTED]> wrote:
These imports of Err all include {-# SOURCE #-} pragmas, which GHC
warns me are unnecessary, but clear change the output. What do the
SOURCE pragma's do? I couldn't find them in the manual.
They break the
On Dec 31, 2007 11:57 AM, Neil Mitchell <[EMAIL PROTECTED]> wrote:
>
> These imports of Err all include {-# SOURCE #-} pragmas, which GHC
> warns me are unnecessary, but clear change the output. What do the
> SOURCE pragma's do? I couldn't find them in the manual.
>
They break the circular depende
Hi
GHC.Arr and GHC.Base both also have this issue, but they could well be
necessary.
These imports of Err all include {-# SOURCE #-} pragmas, which GHC
warns me are unnecessary, but clear change the output. What do the
SOURCE pragma's do? I couldn't find them in the manual.
Thanks
Neil
On 12/3
Hi,
I noticed that Data.List uses "error" normally, but Data.Maybe
explicitly imports it from GHC.Err. Is there a reason for this?
Removing the import GHC.Err line still appears to work.
This caused me issues with circular modules and recursive boot files,
in various mixtures. It's not a fatal is
