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This triggers evaluation of terms with free variables, which the partial
evaluator isn't equipped to handle.
Reported by Aarne.
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This makes the output from PGF.showExpr (and other Haskell code that uses
the Prelude.show function to show strings) parsable as GF source code in
more cases.
This is a workaround for the problem that GHC's implementation of the show
function uses numeric escapes for printable non-ASCII characters, e.g.
show "dålig" = "d\229lig"...
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You can now do things like
cc -trace mkV "debug"
to see a trace of all opers with their arguments and results during the
computation of mkV "debug".
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Oops.
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* "gf -make -j=n" uses n parallel threads.
* "gf -make -j" adapts to the number of processors in the system.
This mimics how "cabal build -j" and "ghc --make -j" works.
Support for this is implemented in the new module GF.System.Concurrency and
it depends on the function Control.Concurrent.setNumCapabilities, which is
only available in GHC>=7.6 (base>=4.6). GF can still be compiled with
GHC<7.6, but then you have to use +RTS -N -RTS to take advantage of
multicore processors.
To detect the number of processors in the system, the code depends on a
foreign import of a C function in the GHC run-time system.
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Apparently Foreign.unsafePerformIO is not just a re-export of
System.IO.Unsafe.unsafePerformIO (or vise versa), it is a different function,
so you get an ambiguity if you import both.
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the standard binary packages
This reduces the amount of duplicated code from 2400 to 490. No code from
data-binary-ieee754 is duplicated.
The module is called PGF.Data.Binary instead of Data.Binary. It is not
in use yet.
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This compensates for other changes that removed line breaks.
Maybe it should have a -lines options like ps and rf?
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It needs to be listed in gf.cabal
unsafePerformIO is only exported from System.IO.Unsafe, starting with ghc-7.8
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semantic graph
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there but the menu item for activating it is not there yet since the functionality is not complete
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Also included some unrelated minor changes.
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which I had forgotten to include in darcs
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Also fixed some warnings and tightened some imports
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in more cases
These changes are inspired by the gf -cshell implementation of these commands.
The output of the linearize command has been changed to remove superfluous
blank lines and commas, and deliver the result as a list of strings instead of
a single multi-line string. This makes it possible to use -all and pipe the
results to the parse command. This also means that with -treebank -all,
the language tag will be repeated for each result from the same language.
The parse command, when trying to parse with more than one language, would
"forget" other results after a failed parse, and thus not send all
successful parses through the pipe. For example, if English is not the first
language in the grammar,
p "hello" | l
would output nothing, instead of translations of "hello" to all languages,
forcing the user to write
p -lang=Eng "hello" | l
instead, to get the expected result. The cause of this behaviour was in the
function fromParse, which was rather messy, so I assume it is not intentional,
but the result of a programming mistake at some point.
The fromParse function has now been refactored from a big recursive function
into
fromParse opts = foldr (joinPiped . fromParse1 opts) void
where the helper functions fromParse1 deals with a single parse result and
joinPiped combines multiple parse results.
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Even though the -lang flag was handled in the implementation, it was not
documented, and GF.Command.Interpreter rejects undocumented flags:
option not interpreted: lang
This must be a fairly old bug, so it suggests that the vp command isn't used
much...
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Supported options and flags: -lang -format -view
None of the rendering options available in the Haskell run-time are supported.
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But the following options are not supported: -mk -nocats -nofuns
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pg supports only the -funs, -cats and -langs output modes.
ai IDENTIFIER shows info about a category or a function. ai can not type check
and refine metavariables in expressions.
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showType :: Type -> String
categories :: PGF -> [Cat]
But both are implemented as quick hacks: categories is implemented by listing
all functions and taking the target categories from their types. showType uses
ppType copied & modified from PGF.Type, and needs a ppExpr, which is currently
implemented by wrapping showExpr...
TODO: need something correpsonding to PGF.categoryContext.
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Options -all and -list use PGF2.linearizeAll, which lists all variants, but
not all forms...
Also, there is no attempt to be compatible with the output from the Haskell
run-rime shell, which produces superfluous blank lines (-all) or
commas (-list), and mixes tagged and untagged lines (-treebank -all).
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Also, when the command line parser fails, append the problematic command line
to the error message "command not parsed".
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The print_history command was among the commands implemented in an ad-hoc
way instead of being handled by the command line interpreter, which means
it could not be used in a pipe, as in the example in the help info.
The refactoring in the previous patch made this old bug easy to fix.
Also fixed a bug in the "empty" command, introduced when moving the PGF from
CommandEnv to GFEnv.
TODO: fix the undocumented eh command. A comment in the help info for
print_history, and some commented out old code, suggest that eh means
"execute_history", but at present it does nothing...
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+ Generalize the CommandInfo type by parameterizing it on the monad
instead of just the environment.
+ Generalize the commands defined in
GF.Command.{Commands,Commands2,CommonCommands,SourceCommands,HelpCommand}
to work in any monad that supports the needed operations.
+ Liberate GF.Command.Interpreter from the IO monad.
Also, move the current PGF from CommandEnv to GFEnv in
GF.Interactive, making the command interpreter even more generic.
+ Use a state monad to maintain the state of the interpreter in
GF.{Interactive,Interactive2}.
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