forked from GitHub/gf-core
199 lines
5.2 KiB
HTML
199 lines
5.2 KiB
HTML
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<body bgcolor="#FFFFFF" text="#000000" >
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<center>
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<IMG SRC="gf-logo.gif">
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<h1>Grammatical Framework History of Changes</h1>
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Changes in functionality since May 17, 2005, release of GF Version 2.2
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</center>
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<p>
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1/7 <b>Release of GF 2.3</b>.
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<p>
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1/7 (AR) Added the flag <tt>-o</tt> to the <tt>vt</tt> command
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to just write the <tt>.dot</tt> file without going to <tt>.ps</tt>
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(cf. 20/6).
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<p>
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29/6 (AR) The printer used by Embedded Java GF Interpreter
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(<tt>pm -header</tt>) now produces
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working code from all optimized grammars - hence you need not select a
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weaker optimization just to use the interpreter. However, the
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optimization <tt>-optimize=share</tt> usually produces smaller object
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grammars because the "unoptimizer" just undoes all optimizations.
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(This is to be considered a temporary solution until the interpreter
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knows how to handle stronger optimizations.)
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<p>
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27/6 (AR) The flag <tt>flags optimize=noexpand</tt> placed in a
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resource module prevents the optimization phase of the compiler when
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the <tt>.gfr</tt> file is created. This can prevent serious code
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explosion, but it will also make the processing of modules using the
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resource slowwer. A favourable example is <tt>lib/resource/finnish/ParadigmsFin</tt>.
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<p>
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23/6 (HD,AR) The new editor GUI <tt>gfeditor</tt> by Hans-Joachim
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Daniels can now be used. It is based on Janna Khegai's <tt>jgf</tt>.
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New functionality include HTML display (<tt>gfeditor -h</tt>) and
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programmable refinement tooltips.
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<p>
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23/6 (AR) The flag <tt>unlexer=finnish</tt> can be used to bind
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Finnish suffixes (e.g. possessives) to preceding words. The GF source
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notation is e.g. <tt>"isä" ++ "&*" ++ "nsa" ++ "&*" ++ "ko"</tt>,
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which unlexes to <tt>"isänsäkö"</tt>. There is no corresponding lexer
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support yet.
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<p>
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22/6 (PL,AR) The MCFG parser (<tt>p -mcfg</tt>) now works on all
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optimized grammars - hence you need not select a weaker optimization
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to use this parser. The same concerns the CFGM printer (<tt>pm -printer=cfgm</tt>).
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<p>
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20/6 (AR) Added the command <tt>visualize_tree</tt> = <tt>vt</tt>, to
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display syntax trees graphically. Like <tt>vg</tt>, this command uses
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GraphViz and Ghostview. The foremost use is to pipe the parser to this
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command.
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<p>
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17/6 (BB) There is now support for lists in GF abstract syntax.
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A list category is declared as:
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<pre>
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cat [C]
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</pre>
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or
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<pre>
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cat [C]{n}
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</pre>
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where <tt>C</tt> is a category and <tt>n</tt> is a non-negative integer.
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<tt>cat [C]</tt> is equivalent to <tt>cat [C]{0}</tt>. List category
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syntax can be used whereever categories are used.
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<p>
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<tt>cat [C]{n}</tt> is equivalent to the declarations:
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<pre>
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cat ListC
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fun BaseC : C^n -> ListC
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fun ConsC : C -> ListC -> ListC
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</pre>
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where <tt>C^0 -> X</tt> means <tt>X</tt>, and <tt>C^m</tt> (where
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m > 0) means <tt>C -> C^(m-1)</tt>.
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<p>
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A lincat declaration on the form:
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<pre>
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lincat [C] = T
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</pre>
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is equivalent to
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<pre>
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lincat ListC = T
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</pre>
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The linearizations of the list constructors are written
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just like they would be if the function declarations above
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had been made manually, e.g.:
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<pre>
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lin BaseC x_1 ... x_n = t
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lin ConsC x xs = t'
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</pre>
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<p>
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10/6 (AR) Preprocessor of <tt>.gfe</tt> files can now be performed as part of
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any grammar compilation. The flag <tt>-ex</tt> causes GF to look for
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the <tt>.gfe</tt> files and preprocess those that are younger
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than the corresponding <tt>.gf</tt> files. The files are first sorted
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and grouped by the resource, so that each resource only need be compiled once.
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<p>
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10/6 (AR) Editor GUI can now be alternatively invoked by the shell
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command <tt>gf -edit</tt> (equivalent to <tt>jgf</tt>).
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<p>
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10/6 (AR) Editor GUI command <tt>pc Int</tt> to pop <tt>Int</tt>
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items from the clip board.
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<p>
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4/6 (AR) Sequence of commands in the Java editor GUI now possible.
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The commands are separated by <tt> ;; </tt> (notice the space on
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both sides of the two semicolons). Such a sequence can be sent
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from the "GF Command" pop-up field, but is mostly intended
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for external processes that communicate with GF.
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<p>
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3/6 (AR) The format <tt>.gfe</tt> defined to support
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<b>grammar writing by examples</b>. Files of this format are first
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converted to <tt>.gf</tt> files by the command
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<pre>
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gf -examples File.gfe
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</pre>
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See <a href="../lib/resource/doc/example/QuestionsI.gfe">
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<tt>../lib/resource/doc/examples/QuestionsI.gfe</tt></a>
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for an example.
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<p>
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31/5 (AR) Default of p -rawtrees=k changed to 999999.
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<p>
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31/5 (AR) Support for restricted inheritance. Syntax:
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<pre>
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M -- inherit everything from M, as before
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M [a,b,c] -- only inherit constants a,b,c
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M-[a,b,c] -- inherit everything except a,b,c
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</pre>
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Caution: there is no check yet for completeness and
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consistency, but restricted inheritance can create
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run-time failures.
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<p>
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29/5 (AR) Parser support for reading GFC files line per line.
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The category <tt>Line</tt> in <tt>GFC.cf</tt> can be used
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as entrypoint instead of <tt>Grammar</tt> to achieve this.
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<p>
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28/5 (AR) Environment variables and path wild cards.
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<ul>
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<li> <tt>GF_LIB_PATH</tt> gives the location of <tt>GF/lib</tt>
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<li> <tt>GF_GRAMMAR_PATH</tt> gives a list of directories appended
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to the explicitly given path
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<li> <tt>DIR/*</tt> is expanded to the union of all subdirectories
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of <tt>DIR</tt>
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</ul>
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<p>
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26/5/2005 (BB) Notation for list categories.
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</body>
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</html>
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