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126 lines
2.9 KiB
HTML
126 lines
2.9 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> 43. <br>
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<b>Release Date</b>:<tt> </tt> August 9, 1996.
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<p>
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<b>Note:</b><tt> </tt>
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Release 44 is planned for August 28 and will include bug fixes
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and better documentation for the new tools.<tt> </tt>
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We encourage our users to try release 43 and submit bug
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reports.<tt> </tt>
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If at all possible, fixes for bugs in release 43 will be
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incorporated into release 44.
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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 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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Added a "Preferences" item on the "Edit" menu.<tt> </tt>
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The "DrScheme" category allows selection of the subset of Scheme
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from purely functional Scheme (no set!, etc) to (almost)
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fully R4RS Scheme.
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<li>
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The Scheme primitives can now be redefined, and there is no longer
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a restriction on using names that begin with "zodiac:".
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<li>
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These syntactic forms not yet supported:<tt> </tt>
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do without the step form, vector constants inside quasiquote, local,
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and define-structure (use define-struct instead).
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<li>
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Significant internal restructuring of the GUI tools DrScheme uses
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to make windows, panels, buttons, etc.
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</ul>
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<h4> Syntax Checker </h4>
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<ul>
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<li>
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Added a Syntax Checker and Colorizer.
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<li>
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Go to the "Tools" menu and click on "Syntax Checker."<tt> </tt>
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Then, clicking on the "Check Syntax" button will highlight
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syntax errors and (on some platforms) color the program according
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to free and bound identifiers, syntactic forms, constants, etc.
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</ul>
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<h4> Debugger </h4>
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<ul>
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<li>
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Added early support for a Debugger.
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<li>
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After loading a file, click on "Debug."<tt> </tt>
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Then, clicking on the beginning of an expression (a "Hotspot")
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will enable setting breakpoints and recording history
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information.<tt> </tt>
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Better documentation is planned for release 44.
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<li>
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<i>Note:</i><tt> </tt>
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The Debugger currently doesn't handle syntax errors very well.<tt> </tt>
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So, first make sure that the program passes "Check Syntax" before
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running the Debugger.
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</ul>
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<h4> Stepper </h4>
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<ul>
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<li>
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Added support for let, let*, letrec, call/cc and improper arguments
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in lambda.
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<li>
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Added Cut, Copy, Paste and Delete to the Edit menu.<tt> </tt>
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Copy and Paste also work between the Stepper and DrScheme.
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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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releases 43 and 44 and will reappear in a future release.
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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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On some platforms (Macintosh and Microsoft Windows), the Syntax Checker
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and the Debugger do not display the program in color.
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<li>
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On the Macintosh, the Debugger window is too small, and the Hotspot
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window does not pop up correctly.
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</ul>
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</body>
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</html>
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