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pre-prepare NEWS
* NEWS: Integrate 1.9.10 entries into the main text.
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Andy Wingo
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154
NEWS
154
NEWS
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@ -8,83 +8,8 @@ Please send Guile bug reports to bug-guile@gnu.org.
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(During the 1.9 series, we will keep an incremental NEWS for the latest
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prerelease, and a full NEWS corresponding to 1.8 -> 2.0.)
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Changes in 1.9.10 (since the 1.9.9 prerelease):
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Changes in 1.9.11 (since the 1.9.10 prerelease):
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** Hygienic macros documented as the primary syntactic extension mechanism.
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The macro documentation was finally fleshed out with some documentation
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on `syntax-case' macros, and other parts of the macro expansion process.
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See "Macros" in the manual, for details.
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** Interactive Guile follows GNU conventions
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As recommended by the GPL, Guile now shows a brief copyright and
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warranty disclaimer on startup, along with pointers to more information.
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On the other hand, changing languages is more concise.
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** Support for arbitrary procedure metadata
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Building on its support for docstrings, Guile now supports multiple
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docstrings, adding them to the tail of a compiled procedure's
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properties. For example:
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(define (foo)
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"one"
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"two"
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3)
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(use-modules (system vm program))
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(program-properties foo)
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=> ((name . foo) (documentation . "one") (documentation . "two"))
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Also, vectors of pairs are now treated as additional metadata entries:
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(define (bar)
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#((quz . #f) (docstring . "xyzzy"))
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3)
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(use-modules (system vm program))
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(program-properties bar)
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=> ((name . bar) (quz . #f) (docstring . "xyzzy"))
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This allows arbitrary literals to be embedded as metadata in a compiled
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procedure.
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** Better documentation infrastructure for macros
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It is now possible to introspect on the type of a macro, e.g.
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syntax-rules, identifier-syntax, etc, and extract information about that
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macro, such as the syntax-rules patterns or the defmacro arguments.
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`(texinfo reflection)' takes advantage of this to give better macro
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documentation.
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** Autocompilation for applications that use Guile as an extension language
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It used to be that only applications that ran Guile through the
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`scm_shell' function got the advantages of autocompilation. This has
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been changed so that all applications have autocompilation on by
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default.
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** Better integration of Lisp nil
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`scm_is_boolean', `scm_is_false', and `scm_is_null' all return true now
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for Lisp's `nil'. This shouldn't affect any Scheme code at this point,
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but when we start to integrate more with Emacs, it is possible that we
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break code that assumes that, for example, `(not x)' implies that `x' is
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`eq?' to `#f'. This is not a common assumption. Refactoring affected
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code to rely on properties instead of identities will improve code
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correctness. See "Nil" in the manual, for more details.
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** Integration of lalr-scm, a parser generator
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Guile has included Dominique Boucher's fine `lalr-scm' parser generator
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as `(system base lalr)'. See "LALR(1) Parsing" in the manual, for more
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information.
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** Documentation for the dynamic foreign function interface (FFI).
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See "Foreign Function Interface" in the manual, for more information.
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** Unicode character set update to Unicode 5.2.
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** And of course, the usual collection of bugfixes
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Interested users should see the ChangeLog for more information.
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@ -109,6 +34,12 @@ The statprof statistical profiler, the SSAX XML toolkit, and the texinfo
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toolkit from Guile-Lib have been imported into Guile proper. See
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"Standard Library" in the manual for more details.
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** Integration of lalr-scm, a parser generator
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Guile has included Dominique Boucher's fine `lalr-scm' parser generator
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as `(system base lalr)'. See "LALR(1) Parsing" in the manual, for more
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information.
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* Changes to the stand-alone interpreter
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** Guile now can compile Scheme to bytecode for a custom virtual machine.
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@ -185,6 +116,10 @@ allows Guile's copy of SSAX to override any Guile-Lib copy the user has
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installed. Also it should cut the number of `stat' system calls by half,
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in the common case.
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** Interactive Guile follows GNU conventions
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As recommended by the GPL, Guile now shows a brief copyright and
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warranty disclaimer on startup, along with pointers to more information.
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* Changes to Scheme functions and syntax
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@ -230,8 +165,7 @@ If you think you need `local-eval', you should probably implement your
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own metacircular evaluator. It will probably be as fast as Guile's
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anyway.
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** Files loaded with `primitive-load-path' will now be compiled
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automatically.
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** Scheme source files will now be compiled automatically.
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If a compiled .go file corresponding to a .scm file is not found or is
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not fresh, the .scm file will be compiled on the fly, and the resulting
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@ -249,20 +183,6 @@ will be created if needed.
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To inhibit autocompilation, set the GUILE_AUTO_COMPILE environment
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variable to 0, or pass --no-autocompile on the Guile command line.
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** Files loaded with `load' will now be compiled automatically.
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As with files loaded via `primitive-load-path', `load' will also compile
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its target if autocompilation is enabled, and a fresh compiled file is
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not found.
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There are two points of difference to note, however. First, `load' does
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not search `GUILE_LOAD_COMPILED_PATH' for the file; it only looks in the
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autocompilation directory, normally a subdirectory of ~/.cache/guile.
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Secondly, autocompilation also applies to files loaded via the -l
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command-line argument -- so the user may experience a slight slowdown
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the first time they run a Guile script, as the script is autocompiled.
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** New POSIX procedures: `getrlimit' and `setrlimit'
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Note however that the interface of these functions is likely to change
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@ -324,6 +244,14 @@ Guile now has an experimental Emacs Lisp compiler and runtime. You can
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now switch to Elisp at the repl: `,language elisp'. All kudos to Daniel
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Kraft, and all bugs to bug-guile@gnu.org.
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** Better documentation infrastructure for macros
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It is now possible to introspect on the type of a macro, e.g.
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syntax-rules, identifier-syntax, etc, and extract information about that
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macro, such as the syntax-rules patterns or the defmacro arguments.
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`(texinfo reflection)' takes advantage of this to give better macro
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documentation.
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** Defmacros may now have docstrings.
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Indeed, any macro may have a docstring. `object-documentation' from
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@ -331,6 +259,32 @@ Indeed, any macro may have a docstring. `object-documentation' from
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have a macro value -- but see the above note about first-class macros.
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Docstrings are associated with the syntax transformer procedures.
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** Support for arbitrary procedure metadata
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Building on its support for docstrings, Guile now supports multiple
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docstrings, adding them to the tail of a compiled procedure's
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properties. For example:
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(define (foo)
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"one"
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"two"
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3)
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(use-modules (system vm program))
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(program-properties foo)
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=> ((name . foo) (documentation . "one") (documentation . "two"))
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Also, vectors of pairs are now treated as additional metadata entries:
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(define (bar)
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#((quz . #f) (docstring . "xyzzy"))
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3)
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(use-modules (system vm program))
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(program-properties bar)
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=> ((name . bar) (quz . #f) (docstring . "xyzzy"))
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This allows arbitrary literals to be embedded as metadata in a compiled
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procedure.
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** The psyntax expander now knows how to interpret the @ and @@ special
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forms.
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@ -594,6 +548,12 @@ been removed, along with `defmacro-transformer', `macro-table',
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any of these procedures provided useful facilities to you, we encourage
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you to contact the Guile developers.
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** Hygienic macros documented as the primary syntactic extension mechanism.
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The macro documentation was finally fleshed out with some documentation
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on `syntax-case' macros, and other parts of the macro expansion process.
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See "Macros" in the manual, for details.
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** psyntax is now the default expander
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Scheme code is now expanded by default by the psyntax hygienic macro
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@ -1195,6 +1155,16 @@ efficient to check e.g. if a value is equal to Scheme's end-of-list or
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Lisp's nil. Additionally there are a heap of new, specific predicates
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like scm_is_null_or_nil.
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** Better integration of Lisp `nil'.
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`scm_is_boolean', `scm_is_false', and `scm_is_null' all return true now
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for Lisp's `nil'. This shouldn't affect any Scheme code at this point,
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but when we start to integrate more with Emacs, it is possible that we
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break code that assumes that, for example, `(not x)' implies that `x' is
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`eq?' to `#f'. This is not a common assumption. Refactoring affected
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code to rely on properties instead of identities will improve code
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correctness. See "Nil" in the manual, for more details.
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** Support for static allocation of strings, symbols, and subrs.
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Calls to snarfing CPP macros like SCM_DEFINE macro will now allocate
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