GitLab

This patch enables argToPat to look through let expressions

e.g.	f (let v = rhs in \y -> ...v...)

Here we can specialise for f (\y -> ...) because the rule-matcher will
look through the let.

This fixes a typo -- a missing prime in tcConPat.  

The test is gadt18.

While modifying TcPat I also trimmed imports, fixed non-exhaustive
patterns, and improved tracing.

In ByteCodeGen, correctly passthru AnnCast in all relevant places, so the previous band-aid fix is no longer needed.

Changes to the RTLD_DEFAULT semantics broke the trick we used to ensure
libc symbols were available to the ghci linker, in OpenBSD 4.0. We can
fix this by linking the ghc binary itself with --export-dynamic on this
system, removing the need for any magic Linker.c games.

GHCi now works on OpenBSD 4.0

Contributed by Eric Mertens <emertens at gmail.com>

- They got lost during manual patching, as they are file additions.

Wed Sep 20 04:01:18 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Adapt FC-code in TcUnify to pre-subsumption

Wed Sep 20 02:52:00 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Some more ASSERTs

Wed Sep 20 02:27:26 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * SPJ's fix to resolve conflict in instFun

Tue Sep 19 14:12:36 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Adjust code from manual merges

Tue Sep 19 14:11:55 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Adapt TcFix imports

Mon Sep 18 19:52:34 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Basic set up for global family instance environment
  Fri Sep 15 15:20:44 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
    * Basic set up for global family instance environment

Mon Sep 18 19:50:42 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Import/export of data constructors in family instances
  Tue Sep 12 13:54:37 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
    * Import/export of data constructors in family instances
    - Data constructors of a data/newtype family F can be exported and imported
      by writing F(..) or F(ConName).
    - This appears the most natural from a user's persepctive - although, it has a
      slightly different flavour than similar import/exports items for closed data 
      types.  The data constructors denoted by F(..) vary in dependence on the 
      visible data instances.
    - This has been non-trivial to achieve as RnNames derives its knowledge of what
      sub-binders an F(..) item exports/imports from the relation specified by 
      Name.nameParent - ie, the constructors of a data/newtype instance need to 
      have the family name (not the internal name of the representation tycon) as 
      their parent.
    
    *** WARNING: This patched changes the iface format! ***
    ***          Please re-compile from scratch!	    ***

Mon Sep 18 19:49:35 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Use smart lookup for tycons
  Tue Sep 12 12:55:10 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
    * Use smart lookup for tycons

Mon Sep 18 19:48:41 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Fix type checking of imported data instances
  Mon Sep 11 20:06:51 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
    * Fix type checking of imported data instances
    - When reading a data/newtype instance from an interface, the data constructors
      have their own universals that do not necessarily match up with their tycon's
      type parameters.  (Whereas when type checking source, they are always the 
      same.)
    - Hence, we need to be careful when building the wrapper signature of imported
      data constructors from data/newtype instances, and rename the type variables
      in the instance types appropriately.

Mon Sep 18 19:48:00 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Fix category of representation tycon
  Mon Sep 11 16:18:51 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
    * Fix category of representation tycon

Mon Sep 18 19:42:48 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Option -findexed-types
  Fri Sep  8 21:35:37 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
    * Option -findexed-types
    - Introduced the switch -findexed-types to activate the indexed type family 
      framework.
    - The switch enables the special 'family' and allows kind signatures (which are
      currently compulsory for associated families).

Mon Sep 18 19:40:42 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Get of fam inst index in ifaces
  Fri Sep  8 16:31:26 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
    * Get of fam inst index in ifaces
    - Removes the explicit index to get unique names for derived tycons for family
      instances again, following a suggestion by SPJ.
    - We now derive the coercion tycon name from the name of the representation 
      tycon, which is in the iface anyways.
    
    *** WARNING: Change of interface file format! ***
    ***          Recompile from scratch!          ***

Mon Sep 18 19:40:05 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Clean up and refactor in SimplUtils.mkCase1 (identity case)
  Wed Sep  6 07:42:45 EDT 2006  simonpj@microsoft.com
    * Clean up and refactor in SimplUtils.mkCase1 (identity case)

Mon Sep 18 19:36:03 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * ATs are now implicitTyThings
  Tue Sep  5 21:09:54 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
    * ATs are now implicitTyThings

Mon Sep 18 19:35:24 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Straightened out implicit coercions for indexed types
  Mon Sep  4 23:46:14 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
    * Straightened out implicit coercions for indexed types
    - HscTypes.implicitTyThings and LoadIface.ifaceDeclSubBndrs now
      include the coercion of indexed data/newtypes.
    - Name generation for the internal names of indexed data/newtypes now uses
      the same counter that generates the dfun unique indexes (ie, class and type
      instances are counted with the one counter).  We could make this two 
      separate counters if that's what's preferred.
    - The unique index of a data/newtype instances needs to go into the iface, so
      that we can generate the same names on slurping in the iface as when the
      original module was generated.  This is a bit yucky, but I don't see a way
      to avoid that (other than putting the full blown internal tycon name and 
      coercion name into the iface, which IMHO would be worse).
    - The predicate for when a datacon has a wrapper didn't take GADT
      equations nor whether it comes froma  family instance into account.
    
    *** WARNING!  This patch changed the interface file format. ***
    ***           Please recompile from scratch.                ***

Mon Sep 18 19:34:38 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Fixed two bugs concerning fanilies
  Mon Sep  4 20:59:49 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
    * Fixed two bugs concerning fanilies

Mon Sep 18 19:24:27 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Indexed newtypes
  Thu Aug 31 22:09:21 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
    * Indexed newtypes
    - This patch makes indexed newtypes work
    - Only lightly tested
    - We need to distinguish between open and closed newtypes in a number of 
      places, because looking through newtypes doesn't work easily for open ones.

Mon Sep 18 19:23:39 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Check category of type instances and some newtype family fixes
  Thu Aug 31 16:54:14 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
    * Check category of type instances and some newtype family fixes

Mon Sep 18 19:19:10 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Better error message for indexes that must be variables
  Wed Aug 30 20:21:33 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
    * Better error message for indexes that must be variables

Mon Sep 18 19:18:18 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Checking conformance of AT indexes with instance heads
  Wed Aug 30 20:13:52 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
    * Checking conformance of AT indexes with instance heads

Mon Sep 18 19:17:18 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Warn of missing ATs and complain about bad ATs
  Mon Aug 28 22:26:22 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
    * Warn of missing ATs and complain about bad ATs