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103 lines
2.5 KiB
HTML
103 lines
2.5 KiB
HTML
27 years ago
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<html>
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<head>
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<title> DrScheme Release Notes </title>
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</head>
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<body>
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<h2><img align=center
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src="http://www.cs.rice.edu/CS/PLT/packages/drscheme/logo.gif"
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alt="[DrScheme logo]">
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DrScheme Release Notes</h2>
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<p>
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<b>Current Release</b>:<tt> </tt> 45 <br>
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<b>Release Date</b>:<tt> </tt> November 12, 1996.
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<p>
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Send bug reports to:<tt>
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<a href="mailto:plt-bugs@cs.rice.edu">
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plt-bugs@cs.rice.edu</a></tt>
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<p>
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The following is a summary of the major changes in this release
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from the previous one.
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<h4> DrScheme </h4>
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<ul>
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<li>
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Scheme I/O through <tt>read</tt>, <tt>read-char</tt>, and
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<tt>read-line</tt> is now supported. All I/O is specially boxed in the
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interactive console to distinguish it from evaluator I/O.
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<li>
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Two syntactic forms are not yet supported:<tt> </tt>
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<tt>do</tt> without the step form and
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<tt>define-structure</tt> (use <tt>define-struct</tt> instead).
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</ul>
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<h4> Analysis </h4>
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<ul>
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<li>
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The Analysis tool (MrSpidey) is temporarily unavailable in
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release 45 and will reappear in a future release.
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</ul>
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<h4> MrEd </h4>
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<ul>
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<li> A new construct has been added: eventspaces. An eventspace
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encapsulates an independent event loop. A single running MrEd can
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contain multiple eventspaces, each owning a collection of top-level
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windows that are connected through the event loop, but indepedent of
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event-handling for other eventspaces. This supports a better
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integration of asynchonous threads and synchnous eventspaces.
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<li> A prototype Web browser is available through the standard "Open
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URL..." menu item in the "File" menu.
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<li>See <tt>plt/mred/HISTORY</tt> and <tt>plt/mred/system/history</tt>
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in the distribution for more information and other changes.
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</ul>
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<h4> MzScheme </h4>
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<ul>
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<li>Multiple return values are now agressively supported,
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and new forms <tt>define-values</tt>, <tt>letrec-values</tt>,
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<tt>set!-values</tt>, etc. have been added.
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<br>
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IMPORTANT: The <tt>let-values</tt> of previous versions is
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now <tt>let*-values</tt>. The new <tt>let-values</tt> binds
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a sequence of identifier sets all with the same enviornment.
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<li>See <tt>plt/mzscheme/HISTORY</tt> in the distribution for more
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information and other changes.
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</ul>
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<h4> Known Problems </h4>
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<ul>
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<li>
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DrScheme internally normalizes pathnames, resolving all links
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to absolute paths. This causes problems with systems that use
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automounting.
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<li>
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Even in the R4RS language level, DrScheme does not support
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case-insensitive identifiers.
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<li>
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The <tt>eval</tt> procedure is not supported.
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<li>
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See also <tt>plt/openbugs</tt> in the distribution.
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</ul>
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</body>
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</html>
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