Module Name:	pkgsrc
Committed By:	itojun
Date:		Sat Dec 30 16:54:07 UTC 2000

Modified Files:
	pkgsrc/lang/scheme48: Makefile
	pkgsrc/lang/scheme48/files: md5 patch-sum
	pkgsrc/lang/scheme48/patches: patch-aa
	pkgsrc/lang/scheme48/pkg: PLIST

Log Message:
upgrade to 0.53.

2/24/99  (version 0.53)
	 Additions:
	  DEFINE-FINITE-TYPE and DEFINE-ENUMERATED-TYPE (in structure
	   FINITE-TYPES; documented in doc/utilities.ps and
	   doc/html/utilities.html.
          Added CHAR-SOURCE->INPUT-PORT, CHAR-SINK->OUTPUT-PORT,
 	   MAKE-STRING-OUTPUT-PORT, STRING-OUTPUT-SOURCE-OUTPUT to
	   the extended-ports structure.
	  The structure BYTE-VECTORS is the same as CODE-VECTORS with `byte'
	   replacing `code' in all the names.  The underlying datatype is the
	   same for both, and uses `byte' when printing.
	  There is a new and much improved interface to C code, thanks to
           Mike Sperber.  It is documented in in doc/external.ps and
	   doc/html/external.html.
         Bug fixes:
	  Session-data and user-context records are no longer in the fluid env.
	  Lexical environments can now be nested up to 65k deep.
	  ,expand no longer prints `definition in expression context' warnings.
	  Added ARRAY? and SEARCH-TREE? to the array and search tree structures.
	  Flat environments work again.
	  Templates of the form `var ... ...' now work in syntax rules.
	  Reinstated caching of SCHEMIFY results to greatly reduce the space
           used by debugging info.
	  Added argument checking to STRING->NUMBER and NUMBER->STRING.
	  Fixed space blow-up in LOAD.
	  Unused ports are closed more reliably.
	 Changes:
	  The heap, gc, and image code is now in three separate modules.
          The symbol table is now held in a VM register.
	  Inlined SHOWING-FOCUS-VALUES into the main command loop and moved
	   the sentinal call to reduce the noise at the base of ,preview output.
	  The tables returned by MAKE-TABLE now use EQV? for comparison (instead
	   of EQ?).  This makes these tables about 50% slower when numbers are
           used as keys, but significantly more accurate.
	  Floating-point numbers are no longer double boxed.
	  The channels structure has been split into channels and low-channels.


To generate a diff of this commit:
cvs rdiff -r1.15 -r1.16 pkgsrc/lang/scheme48/Makefile
cvs rdiff -r1.4 -r1.5 pkgsrc/lang/scheme48/files/md5
cvs rdiff -r1.1 -r1.2 pkgsrc/lang/scheme48/files/patch-sum
cvs rdiff -r1.2 -r1.3 pkgsrc/lang/scheme48/patches/patch-aa
cvs rdiff -r1.4 -r1.5 pkgsrc/lang/scheme48/pkg/PLIST

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.