98 lines
3.9 KiB
Plaintext
98 lines
3.9 KiB
Plaintext
Subject: Mes 0.12 released
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I am pleased to announce the release of Mes 0.12, representing 120
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commits over 20 weeks. MesCC is prototyped running on Guile and can
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now run on Mes. Performance of Mes running MesCC has been improved by
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a factor of 100; mes.c (~3000 LOC) now compiles in ~4min. Many fixes
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and enhancements make that now also TinyCC parses (~1.5h) and compiles
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(~20min) with Mes+MesCC (Guile+MesCC takes ~2min).
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Special thanks go to Ricardo Wurmus for sharing the recursive macro
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expand perspective and starting work on that, to Han-Wen Nienhuys for
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his sharp `Ah, so you skipped SICP chapter 3' remark and to rain1 for
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their continuous help on #bootstrapping and their `let's only expand
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global variables' insight.
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* About
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Mes[0] aims to create full source bootstrapping for GuixSD[1] as
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part of the bootstrappable builds[2] project.
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It currently consists of a mutual self-hosting [close to Guile-]
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Scheme interpreter prototype in C and a Nyacc-based C compiler in
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[Guile] Scheme. This C prototype will be simplified to be
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transpiled by M2-Planet[3].
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The Scheme interpreter prototype (mes.c) has a Garbage Collector,
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a library of loadable Scheme modules-- notably Dominique Boucher's
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LALR[4], pre-R6RS portable syntax-case[5] with R7RS ellipsis, Matt
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Wette's Nyacc[6], Guile's PEG[7] --and test suite just barely
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enough to support a simple REPL (repl.mes) and simple C-compiler
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MesCC (mescc.mes).
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MesCC can compile a modified TinyCC[8] that is close to being
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self-hosting. A GNU Gcc-compiled tcc is known[9] to compile GCC.
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Mes is inspired by The Maxwell Equations of Software: LISP-1.5[10]
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-- John McCarthy page 13, GNU Guix's source/binary packaging
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transparency and Jeremiah Orians's stage0[11] ~300 byte self-hosting
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hex assembler.
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* Download
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git clone https://gitlab.com/janneke/mes
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wget https://gitlab.com/janneke/mes/repository/archive.tar.gz?ref=v0.12 -O mes-0.12.tar.gz
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Mes runs from the source tree and can also be built, packaged and
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installed in Guix[SD] by the usual
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guix package -f guix.scm
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* Changes in 0.12 since 0.11
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** Core
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*** Mes can now run Nyacc (0.80.42) to compile itself in ~4min (~3000 LOC).
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*** Mes now recursively expands global variables per top level statement.
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*** Mes now recursively expands macros per top level statement.
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*** Mes now boots from MES_BOOT (default: module/mes/boot-0.scm).
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*** Mes now has a full Scheme reader in C again.
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This gives a 10x-20x performance improvement and increases the
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bootstrap footprint by 160 LOC.
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*** Mes reader now supports older abbreviated character forms
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#\bel, #\bs, #\ht and #\vt.
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*** 3 new functions
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equal2?, memq, core:write.
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** Language
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*** Mes now has an incremental Scheme semantics test suite with 71 small tests.
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*** Variable names can now have ticks.
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*** Mes now evaluates expresions of COND only once.
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*** srfi-9 records have been reimplemented.
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*** #\page is now whitespace.
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*** #<eof> is no longer a character.
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*** 2 new macros
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define-macro*, with-fluids.
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*** 9 new functions
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dirname, last, reverse-list->string, setenv, string-drop-right,
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string-fold, string-fold-right, string-null?, write.
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** MesCC
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**** 9 new functions
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chmod, getopt_long, ferror, itoab, longjmp, qsort, setenv, setjmp, strtol.
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**** 2 new header files
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endian.h, sys/signal.h.
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Greetings,
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janneke
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[0] https://gitlab.com/janneke/mes
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[1] https://www.gnu.org/software/guix
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[2] http://bootstrappable.org
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[3] https://github.com/oriansj/m2-planet
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[4] https://github.com/schemeway/lalr-scm
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[5] https://www.cs.indiana.edu/chezscheme/syntax-case/old-psyntax.html
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[6] https://www.nongnu.org/nyacc/
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[7] https://www.gnu.org/software/guile/docs/master/guile.html/PEG-Parsing.html
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[8] https://gitlab.com/janneke/tinycc
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[9] https://lists.gnu.org/archive/html/tinycc-devel/2017-05/msg00103.html
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[10] http://www.softwarepreservation.org/projects/LISP/book/LISP%201.5%20Programmers%20Manual.pdf
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[11] https://github.com/oriansj/stage0
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