This also allows the parameter rec to be removed from function computeTermOpt.
(The change is made in GF.Compile.Compute.ConcreteLazy, but not in
GF.Compile.Compute.ConcreteStrict.)
This patch adds GF.Compile.Compute.ConcreteLazy, which replaces the Err monad
with the Identity monad. While the Err monad makes the interpreter
(hyper)strict, the Identity monad let's the interpreter inherit Haskell's
laziness. This can give big speedups: from 50s to 1s in one example,
from ~4 minutes to ~2 minutes for the RGL.
This is still experimental and might be buggy, so it is off by default.
You can turn it on by configuring with the -fcclazy flag, e.g.
cabal configure -fcclazy
Let me know if anything breaks.
This speeds up the compilation of PhrasebookFin.pgf by 12%, mosly by speeding
up calls to lookupModule in calls from lookupParamValues, in calls
from allParamValues.
The invariant "modules are stored in dependency order" is no longer respected!
But the type MGrammar is now abstract, making it easier to maintain this or
other invariants in the future.
* The gf command line options -preproc=mkPresent and -preproc=mkMinimal now
refer to internal preprocessors equivalent to lib/src/mkPresent
and lib/src/mkMinimal.
* The temporary file _gf_preproc.tmp is not created when running an
internal preprocessor, unless there is an error, since errors messages
refer to locations in the preprocessed file. (Possibly allowing the rgl
build to be parallelized.)
* After running an external preprocessor, the temporary file is deleted,
unless there was an error.
* (Bug fix) Before, when running more than one preprocessor, the same file name
would be used for both input and output, e.g.,
mkPresent _gf_preproc.tmp > _gf_preproc.tmp
which would result in an empty file being processed. Now, the input and
output files will always be different.
