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83 lines
2.0 KiB
HTML
83 lines
2.0 KiB
HTML
27 years ago
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<title>Release Notes for DrScheme</title>
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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>: 0.40.<br>
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<b>Release Date</b>: March 22, 1996.
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<p>
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The following is a list of differences between this release and the
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previous one.
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<p>
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<h4>Editor</h4>
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<p>
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The long-known instability in the Windows 95/NT version has finally
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been corrected. Also, a major instability in the 68k Macintosh version
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has been fixed. The Win32s version remains unstable.
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<p>
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<h4>Type-Analysis</h4>
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<p>
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The number in parentheses indicates the section in the reference
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manual that describes the feature.
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<ul>
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<li>Improved, faster type compression.
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<li>Accurate description of numeric values (4.3).
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<li>Constants (number, character or symbol) in the input type
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language.
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<li>Type assertions, <code>(: exp type)</code>, have been added (5.4).
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<li><code>define-type</code> changed to
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<code>define-constructor</code> (5.2).
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<li><code>st:deftype</code> changed to <code>st:defconstructor</code> (6.2).
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<li>Added <code>define-type</code>, <code>st:deftype</code> (5.3 and 6.2).
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<li>Changed <code>(list T)</code> to <code>(listof T)</code> (4.2).
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<li>Added list type with the same same semantics as in Scheme (4.2).
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<li><code>(+ T1 ... Tn)</code> changed to <code>(union T1
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... Tn)</code> (4.1).
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</ul>
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<h4>Debugger</h4>
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<p>
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A completely new debugger has been incorporated. This debugger has
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been measured to be twenty times or more faster than the previous
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version. In particular, the debugger does not do worse than double
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the execution time. In return, the debugger currently reports both
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incorrect-arity errors and non-procedural application errors as
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``application errors''.
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<p>
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<img align=center
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src="http://www.cs.rice.edu/CS/PLT/lambdahead.gif"
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alt="[PLT logo]">
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<p>
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<address>
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<a href="http://www.cs.rice.edu/~shriram/">Shriram
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Krishnamurthi</a> /
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<a href="mailto:shriram@cs.rice.edu">shriram@cs.rice.edu</a>
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</address>
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</body>
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