This changes the TLP code to use CCSP's stand-alone mode, and gets rid of the
old KRoC wrapper stuff. It also changes occam_stop everywhere in order to pass
the number of arguments (since ExternalCallN needs that now), and cleans up the
interaction with the C++ backend a bit.
The temporary files used during compilation are now just the output name with
an appropriate extension added (so when compiling to cgtest02, it'll produce
cgtest02.cpp, etc.). This is what GCC and KRoC do; it keeps the temp files with
the binaries that were produced from them, and avoids having to pick a sensible
directory to put randomly-named temp files in.
This particular file was badly in need of some love, being some of the first
code I wrote on Tock, and thus being a mix of my early style, my late style,
and Neil's style. I've cleaned it up quite a bit, fixing whitespace damage and
dodgy indentation, and making sure lists are alphabetised.
This patch is actually an amalgam of multiple (already large) patches. Those patches conflicted (parameterised Structured vs. changes to usage checking and FlowGraph) and encountered a nasty bug in darcs 1 involving exponential time (see http://wiki.darcs.net/DarcsWiki/ConflictsFAQ for more details). Reasoning that half an hour (of 100% CPU use) was too long to apply patches, I opted to re-record the parameterised Structured changes as this new large patch. Here are the commit messages originally used for the patches (which, as mentioned, were already large patches):
A gigantic patch switching all the non-test modules over to using parameterised A.Structured
Changed the FlowGraph module again to handle any sort of Structured you want to pass to it (mainly for testing)
A further gigantic patch changing all the tests to work with the new parameterised Structured
Fixed a nasty bug involving functions being named incorrectly inside transformInputCase
Added a hand-written instance of Data for Structured that allows us to use ext1M properly
Fixed a few warnings in the code
ErrorReport is of type (Maybe Meta, String), thereby adding an optional code position to error messages.
Die has been changed so that die and dieP are now implemented in terms of dieReport (:: ErrorReport -> m a). This involved changing less code than changing die to be of type ErrorReport -> m a. All that had to be changed directly was that Die instances now implement dieReport instead of die.
Any bits of code that "caught" errors has been changed so that it handles ErrorReport instead of String. This ErrorReport is eventually, in Main, passed to dieIO, which will soon be changed to read the file in and provide the context. Accordingly, MonadIO m has been added as a constraint to dieIO, and dieInternal has been changed to no longer use dieIO (because really we can't add the MonadIO constraint to dieInternal).
Various error messages have been changed. Notably, all instances of fail in ParseOccam have been changed to use die or, wherever possible, dieP. A similar thing has been done in EvalConstants and EvalLiterals.
Neil spotted that I'd broken the C++CSP backend with these changes, and I
wasn't very happy with what I'd done anyway, so this is take 2. Now there's a
separate pass that runs before GenerateC which builds a set of functions used
in PARs.
Since the set of passes that runs now depends on several variables, there's now
an expression which builds a list of passes to run; this should be easier to
extend in the future.
The occam parser is now a GenParser Token OccState, rather than a GenParser
Char OccState, and a lot of now-redundant code has been removed. The parser is
also somewhat faster, which wasn't intended but is nice anyway.
I've also modified the Rain parser to not rely on the old preprocessing code;
it wasn't appropriate for Rain's syntax anyway, so I assume Neil will be
replacing it eventually.
It turns out there's a Prelude function that does what readSource does already
-- so just use that. (I was in the process of moving readSource into Utils when
I found it, since I want to use it in other places.)
