2 #+TITLE: Mes NEWS – history of user-visible changes
3 #+STARTUP: content hidestars
5 Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
7 Copying and distribution of this file, with or without modification,
8 are permitted in any medium without royalty provided the copyright
9 notice and this notice are preserved.
11 Please send Mes bug reports to janneke@gnu.org.
13 * Changes in 0.4 since 0.3
16 The C-reader needs only support reading of words and lists
17 (s-expressions), line-comments. Quoting, characters, strings,
18 block-comments are all handled by the Scheme reader later.
20 *** Keywords are supported.
21 *** Cond now supports =>.
22 *** Lambda* and define* are now supported.
23 * Changes in 0.3 since 0.2
25 *** Number-based rather than pointer-based cells.
26 *** Garbage collector aka Jam scraper.
27 A variant on SICP's stop and copy Garbage Colletor (Jam Scraper?)
28 algorithm has been implemented.
29 *** The reader has been moved to Scheme.
31 *** Simple loadable modules.
32 *** Srfi-9 and match use handwritten syntax-rules (mes-use-module (mes syntax)).
33 *** Optional syntax-case using psyntax (mes-use-module (mes psyntax)).
34 ** Noteworthy bug fixes
35 *** Srfi-0 has been fixed.
36 * Changes in 0.2 since 0.1
38 *** Names of symbols and strings are list of characters [WAS: c-string].
39 *** Sc-expand from pre-R6RS's psyntax has been integrated.
40 *** Undefined variable error now shows the name of the undefined variable.
41 *** There is now only one SCM type for builtin functions.
42 *** Macro expansion has been cleaned-up.
44 *** Mes now provides a subset of R6RS.
45 *** Mes now provides syntax-case.
46 *** Mes now provides `load'.
47 ** Noteworthy bug fixes
48 *** Using values as second parameter of builtin function yields first value.
49 *** Quoted internals (e.g. 'if 'lambda) are now symbols.
50 *** Syntax error now exits.
51 *** Make+Bash voodoo has been replaced by build-aux/mes-snarf.scm.
52 *** Apply now accepts multiple list arguments.
53 *** Apply of character, inernal, number, string is an error.
54 *** Quasisyntax reading
56 * Changes in 0.1 (since progress report #2)
58 *** expand_macro is now a separate function.
59 *** A smaller core can now compiled using BOOT=1.
60 The smaller core does not provide define, define-macro, or quasiquote;
61 these are provided from a Scheme version of implemented eval/apply.
63 *** Mes now provides a subset of R5RS.
64 *** Mes now provides let-syntax.
65 *** Mes now provides match.
66 *** Mes now provides quasisyntax, unsyntax and unsyntax-splicing.
68 *** Mes now provides a REPL, run:
70 *** Mes compiler can be run as a script:
71 scripts/mescc.mes doc/examples/main.c
72 *** Macro expansion can be inspected in the REPL, e.g.:
74 ** Noteworthy bug fixes
75 *** Performance: scripts/mescc.mes now takes 2s to compile main.c (was 1'20").
76 *** Symbols are now truly unique.
77 * '(), #t, #f are no longer symbols.