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This is to avoid one trivial reason for failures in the test suite.
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+ Eliminated vairous ad-hoc coersion functions between specific monads
(IO, Err, IOE, Check) in favor of more general lifting functions
(liftIO, liftErr).
+ Generalized many basic monadic operations from specific monads to
arbitrary monads in the appropriate class (MonadIO and/or ErrorMonad),
thereby completely eliminating the need for lifting functions in lots
of places.
This can be considered a small step forward towards a cleaner
compiler API and more malleable compiler code in general.
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+ References to modules under src/compiler have been eliminated from the PGF
library (under src/runtime/haskell). Only two functions had to be moved (from
GF.Data.Utilities to PGF.Utilities) to make this possible, other apparent
dependencies turned out to be vacuous.
+ In gf.cabal, the GF executable no longer directly depends on the PGF library
source directory, but only on the exposed library modules. This means that
there is less duplication in gf.cabal and that the 30 modules in the
PGF library will no longer be compiled twice while building GF.
To make this possible, additional PGF library modules have been exposed, even
though they should probably be considered for internal use only. They could
be collected in a PGF.Internal module, or marked as "unstable", to make
this explicit.
+ Also, by using the -fwarn-unused-imports flag, ~220 redundant imports were
found and removed, reducing the total number of imports by ~15%.
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Introduced the function
parallelCheck :: [Check a] -> Check [a]
that runs independent checks in parallel, potentially allowing faster grammar
compilation on multi-core computers, if you run gf with +RTS -N.
However, on my dual core laptop, this seems to slow down compilation somewhat
even though CPU utilization goes up as high as 170% at times.
(This is with GF compiled with GHC 7.0.4.)
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In GF.Compile.CheckGrammar, use a new topological sorting function that
groups independent judgements, allowing them all to be checked before
continuing or reporting errors.
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Reimplemented it with the new function accumulateError.
Also keeping the formatting of errors and warnings unchanged for now, to avoid
potentially causing problems in the GF Eclipse Plugin.
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In addition to warnings, the Check monad in GF.Infra.CheckM can now accumulate
errors. There are two new functions
checkAccumError: Message -> Check ()
accumulateError :: (a -> Check a) -> a -> Check a
The former (with the same type as checkWarn) is used to report an accumulated
(nonfatal) error. The latter converts fatal errors into accumulated errors.
Accumulated errors are reported as regular errors by runCheck.
Also, the Check monad type has been made abstract.
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from deprecated
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