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<div id="preamble" class="status">
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<ul>
<li><a href="index.html">Clasp</a>
<ul>
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</ul></li>
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<ul>
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<li><a href="manual.html">Manual</a></li>
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<li><a href="acknowlegements.html">Acknowledgements</a></li>
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</div>
</div>
<div id="content" class="content">
<h1 class="title">News</h1>
<div id="outline-container-org10a67be" class="outline-2">
<h2 id="org10a67be"><span class="timestamp-wrapper"><span class="timestamp"><2022-10-26 Wed> </span></span> Version 2.0.0 (LLVM14)</h2>
<div class="outline-text-2" id="text-org10a67be">
</div>
<div id="outline-container-org0fd4b60" class="outline-3">
<h3 id="org0fd4b60">Added</h3>
<div class="outline-text-3" id="text-org0fd4b60">
<ul class="org-ul">
<li>Lisp based koga metabuilder that outputs Ninja build files.</li>
<li>basic Debian packaging files.</li>
<li><code>core:*extension-systems*</code>, <code>core:*initialize-hooks*</code> and
<code>core:*terminate-hooks</code> dynamic variables have been added to support new
extension loading method. <code>core:*extension-systems*</code> is a list of keywords
that name extension systems to load after Clasp starts and before <code>--load</code>
and <code>--eval</code> command line options are processed. The remaining two variables
are lists of functions that are called to do initialization before a REPL is
started and termination after the REPL exits.</li>
<li><code>--script <file></code> command line option which equivalent to passing <code>--norc</code>,
<code>--noinform</code> and <code>--non-interactive</code>. Any shebang in <code><file></code> will also be
skipped.</li>
<li>Asynchronous external process control with <code>ext:run-program</code>.</li>
<li>Function <code>ext:temporary-directory</code> that returns the directory used for
temporary files.</li>
<li>Function <code>ext:printing-char-p</code> that returns non-NIL for graphic characters
that are not blank glyphs. This is an extension of the ANSI specification
that defines "printing" characters as graphic characters aside from the space
character.</li>
</ul>
</div>
</div>
<div id="outline-container-org9359be6" class="outline-3">
<h3 id="org9359be6">Changed</h3>
<div class="outline-text-3" id="text-org9359be6">
<ul class="org-ul">
<li><code>core:lisp-implementation-id</code> and <code>core:clasp-git-full-commit</code> only return
non-<code>NIL</code> values if Clasp was built in a git working tree.</li>
<li><code>graphic-char-p</code>, <code>alpha-char-p</code>, <code>alphanumericp</code>, <code>upper-case-p</code>,
<code>lower-case-p</code>, <code>both-case-p</code>, <code>char-upcase</code> and <code>char-downcase</code> now no longer
depend on C++ locale functions and are now generated directly from the Unicode
character tables.</li>
<li>Loading of extensions such as Cando no longer uses startup scripts via LOAD.
Instead the systems associated with each extension are loaded via QL:QUICKLOAD
or as a fallback ASDF:LOAD-SYSTEM.</li>
<li>Behavior of <code>--rc</code> command line option has changed. Relative paths passed via
this option are no longer assumed to be located in the user's home directory.</li>
<li>The logical hosts used by Clasp to locate source code and other components of
Clasp has been changed. Only the reserved logical host SYS is now used. The
default mappings for a system installed to <code>/usr/</code> are
<ol class="org-ol">
<li><code>SYS:LIB;**;*.*.*</code> ↦ <code>/usr/lib/clasp/**/*.*</code></li>
<li><code>SYS:GENERATED;**;*.*.*</code> ↦ <code>/usr/share/clasp/generated/**/*.*</code></li>
<li><code>SYS:EXECUTABLE;**;*.*.*</code> ↦ <code>/usr/bin/**/*.*</code></li>
<li><code>SYS:QUICKLISP;**;*.*.*</code> ↦ <code>~/quicklisp/**/*.*</code></li>
<li><code>SYS:**;*.*.*</code> ↦ <code>/usr/share/clasp/**/*.*</code></li>
</ol></li>
<li>ASDF systems that are loaded as part the cclasp image are now marked as
immutable thereby preventing ASDF from overwriting them. These systems include
the systems acclimation, alexandria, clasp-cleavir, cleavir-ast-to-bir,
cleavir-ast, cleavir-ast-transformations, cleavir-attributes, cleavir-bir,
cleavir-bir-transformations, cleavir-compilation-policy, cleavir-conditions,
cleavir-cst-to-ast, cleavir-ctype, cleavir-environment,
cleavir-io,cleavir-meter, cleavir-primop, cleavir-set, cleavir-stealth-mixins,
closer-mop, concrete-syntax-tree, concrete-syntax-tree-base,
concrete-syntax-tree-destructuring, concrete-syntax-tree-lambda-list,
eclector, and eclector-concrete-syntax-tree.</li>
<li>Source code file references for Lisp and C/C++ files compiled as part of the
Clasp binary or images are now stored using logical pathnames.</li>
<li>Unicode character database updated to 2022-08-03.</li>
</ul>
</div>
</div>
<div id="outline-container-org6908c49" class="outline-3">
<h3 id="org6908c49">Removed</h3>
<div class="outline-text-3" id="text-org6908c49">
<ul class="org-ul">
<li><code>core:*extensions-startup-loads*</code> and <code>core:*extensions-startup-evals*</code>
dynamic variables have been removed since they are no longer used.</li>
<li>The <code>--resources-dir</code> command line option has been removed. Equivalent
behavior is achieved with the <code>CLASP_HOME</code> environment variable.</li>
</ul>
</div>
</div>
<div id="outline-container-orgc560e08" class="outline-3">
<h3 id="orgc560e08">Enhancements</h3>
<div class="outline-text-3" id="text-orgc560e08">
<ul class="org-ul">
<li><code>make-instance</code> and CLOS slot access functions can be used with structure
objects.</li>
<li>The stepper, accessible through <code>step</code>, now has basic functionality.</li>
<li><code>gctools:save-lisp-and-die</code> now accepts a key <code>:executable</code> which can be used
to create an executable binary with the snapshot embedded in the binary.</li>
<li><code>garbage-collect</code>, <code>finalize</code>, and <code>save-lisp-and-die</code> are now exported from
the <code>ext</code> interface package.</li>
</ul>
</div>
</div>
<div id="outline-container-org199d46c" class="outline-3">
<h3 id="org199d46c">Optimizations</h3>
<div class="outline-text-3" id="text-org199d46c">
<ul class="org-ul">
<li>Arguments to and return values from local functions (e.g. from FLET) are
passed unboxed in some common cases.</li>
<li>Nonlocal exits are much faster in most cases, the exception being when
the exit goes through uncooperative C++ code.</li>
<li>Types inferred for many standard functions are tighter.</li>
<li>Calls to some local functions with &rest parameters are more efficient.</li>
<li>LENGTH is now a "vaslistable" function; &rest parameters that are only
used for vaslistable functions can be compiled to avoid consing.</li>
<li>Multiple value calls and APPLY calls to known functions can sometimes
be optimized.</li>
<li>Some MAKE-ARRAY calls are compiled more efficiently.</li>
<li>Unused calls to many more (side-effect-free) standard functions are deleted.</li>
<li>Accesses to 1D simple arrays of known element type are a bit faster.</li>
<li>A virtual machine has been defined and implemented, greatly increasing the
speed of evaluation of code that doesn't usually need to be optimized
(for example, compile-time evaluations).</li>
<li>The building process has been streamlined by replacing several of the
bootstrapping components with the virtual machine.</li>
<li>Discriminating functions now execute faster.</li>
<li>The compiler now performs inlining much faster.</li>
</ul>
</div>
</div>
<div id="outline-container-org8065054" class="outline-3">
<h3 id="org8065054">Fixes</h3>
<div class="outline-text-3" id="text-org8065054">
<ul class="org-ul">
<li>Replace hard coded paths to <code>nm</code> in snapshot code with <code>NM_BINARY</code> macro value
set by configure.</li>
<li>Clasp can now be built directly from source. Resolves <a href="https://github.com/clasp-developers/clasp/issues/175">issue #175</a>.</li>
<li>Snapshots now parse command line options such as <code>--noinform</code>, <code>--noprint</code>,
<code>--quit</code>, and <code>--disable-debugger</code>.</li>
<li>Source locations for warnings from errors during constant folding now
print correctly.</li>
<li>Unused calls that must remain in safe code are no longer deleted.</li>
<li>Prevent negative zero remainder in <code>core__next_ftruncate</code>. Fixes <a href="https://github.com/clasp-developers/clasp/issues/1368">#1368</a>.</li>
</ul>
</div>
</div>
</div>
<div id="outline-container-org05e20bf" class="outline-2">
<h2 id="org05e20bf"><span class="timestamp-wrapper"><span class="timestamp"><2021-05-25 Tue> </span></span> Version 1.0</h2>
<div class="outline-text-2" id="text-org05e20bf">
<ul class="org-ul">
<li>Clasp has the ability to save and restart from memory snapshots.</li>
<li>Clasp supports the addition of extensions written in C++ by adding them to the extensions directory.
The extensions integrate with the clasp build system.</li>
<li>The Clasp Cleavir compiler now uses basic blocks to do many new optimizations.</li>
<li>A multithreaded compiler that compiles abstract-syntax-trees to native code in multiple threads. It speeds up compilation by a factor of 2-3x.</li>
</ul>
</div>
</div>
<div id="outline-container-org997fced" class="outline-2">
<h2 id="org997fced"><span class="timestamp-wrapper"><span class="timestamp"><2015-11-20 Fri> </span></span> Version 0.4</h2>
<div class="outline-text-2" id="text-org997fced">
<ul class="org-ul">
<li>Clasp has a completely new, optimizing/inlining compiler based on Cleavir.</li>
<li>Fixnum, character and single-float types are immediate values.</li>
<li>General object pointers and cons pointers are tagged for speed.</li>
<li>Lots of bug fixes and stability improvements.</li>
</ul>
</div>
</div>
</div>
<div id="postamble" class="status">
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