The trees are drawn by using the Haskell run-time request
AppEng.pgf?command=abstrtree&tree=...
Thus AppEng.pgf has to be installed on the server and in sync with App14.pgf.
This is to avoid loading the huge App14.pgf in the Haskell run-time system, and
is enough since we only need the abstract syntax.
For improved performance, request only one translation from the server
initially. When the user clicks on a translated sentense, request 9 more
translations.
If the enumaration of table parameter values fails during the static
traversal phase, try again in the dynamic computation phase, when the values
of bound variables are known.
This is necessary to properly deal with generic table construction in opers,
like the ones found in prelude/Coordination.gf, e.g.
consTable : (P : PType) -> ... = \P ... -> {s1 = table P {...} ; ... }
GF.Compile.Optimize.mkLinReference can fail and cause this error because
the helper function inside it applies msum to a list that might be empty
(if there is a record type that does not contain a field of type Str).
This means that it can return mzero::Err, i.e.
Bad "error (no reason given)"
which can slip through the top level test that only catches Bad "no string".
Because the prompt included the name of the abstract syntax, the loading
of the PGF was forced even if -retain was used. Even worse,
if an error occured while loading the PGF, it was repeated and caught
every time the prompt was printed, creating an infite loop. The solution
is to not print the name of the abstract syntax when the grammar is
imported with -retain, which is the way things were before anyway.
The commands available in the shell after import -retain are now a superset
of the commands available after import without -retain.
The PGF is created lazily, so there should be no performance penalty if
the PGF isn't needed. If there are errors, they won't be reported until a
command that uses the PGF is entered.
2 modules: Name clashes caused by Applicative-Monad change in Prelude
2 modules: Ambiguities caused by Foldable/Traversable in Prelude
2 modules: Backwards incompatible changes in time-1.5 for defaultTimeLocale
9 modules: {-# LANGUAGE FlexibleContexts #-} (because GHC checks inferred types
now, in addition to explicitly given type signatures)
Also silenced warnings about tab characters in source files.
