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* module/Makefile.am: Add language/sassy.scm. Probably EXTRA_DIST the dependant files, too. * module/language/sassy.scm: New file, the sassy loader. Sassy is originally R5RS code that loads a number of files. I've converted that toplevel file to be a Guile module that *includes* the subfiles, so that it all gets compiled together. It's a pretty bad hack though, because what I should be doing is including them relative to the sassy.scm source location, but we don't know that at expansion time. Something to fix. really bad hack in it so that it will compile correctly -- p * module/language/sassy/: All the sassy files and some changelog information. All of these files are LGPLv2.1+, so they can be included in Guile. * test-suite/standalone/sassy/tests/: Add the sassy unit tests. * test-suite/standalone/Makefile.am: * test-suite/standalone/test-sassy: Hook the sassy unit tests up to our test suite.
136 lines
4.7 KiB
Scheme
136 lines
4.7 KiB
Scheme
; macros.scm - Sassy's macro system
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; Copyright (C) 2005 Jonathan Kraut
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; This library is free software; you can redistribute it and/or
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; modify it under the terms of the GNU Lesser General Public
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; License as published by the Free Software Foundation; either
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; version 2.1 of the License, or (at your option) any later version.
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; This library is distributed in the hope that it will be useful,
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; but WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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; Lesser General Public License for more details.
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; You should have received a copy of the GNU Lesser General Public
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; License along with this library; if not, write to the Free Software
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; Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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; Contact:
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; Jonathan Kraut
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; 4130 43 ST #C2
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; Sunnyside, NY 11104
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; jak76@columbia.edu
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; see file COPYING in the top of Sassy's distribution directory
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; module macros
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; import srfi-69 intern
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; import-syntax meta-lambda
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; export sassy-expand
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(define sassy-expand
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(let
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((sassy-internal-macros ; permanent macros
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(alist->hash-table
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`((< . ,(lambda (a b) `(seq (cmp ,a ,b) l!)))
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(<= . ,(lambda (a b) `(seq (cmp ,a ,b) le!)))
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(> . ,(lambda (a b) `(seq (cmp ,a ,b) g!)))
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(>= . ,(lambda (a b) `(seq (cmp ,a ,b) ge!)))
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(= . ,(lambda (a b) `(seq (cmp ,a ,b) e!)))
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(!= . ,(lambda (a b) `(seq (cmp ,a ,b) ne!)))
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(zero? . ,(lambda (x) `(seq (test ,x ,x) z!)))
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(asciiz . ,(lambda (x) `(bytes ,x 0)))
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(alt . ,(lambda x `(inv (seq ,@(map (lambda (y)
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`(inv ,y))
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x)))))
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(times . ,(lambda (num e)
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(cons 'begin (make-list num e))))
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(until . ,(lambda (test body) `(while (inv ,test) ,body)))
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(cs: . ,(lambda rst `(cs (& ,@rst))))
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(ds: . ,(lambda rst `(ds (& ,@rst))))
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(ss: . ,(lambda rst `(ss (& ,@rst))))
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(es: . ,(lambda rst `(es (& ,@rst))))
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(fs: . ,(lambda rst `(fs (& ,@rst))))
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(gs: . ,(lambda rst `(gs (& ,@rst))))
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(_global_offset_table_ . ,(string->symbol "_GLOBAL_OFFSET_TABLE_"))
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(get-got . (seq (call $eip)
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(pop ebx)
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(add ebx (reloc gotpc _global_offset_table_ 3))))
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(got-offset . ,(lambda (sym . vals)
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`(reloc gotoff ,sym ,(if (null? vals)
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0
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(apply + vals)))))
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(got . ,(lambda (symbol) `(reloc got32 ,symbol)))
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(plt . ,(lambda (symbol) `(reloc plt32 ,symbol)))
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(sym . ,(lambda (symbol) `(reloc sym32 ,symbol)))))))
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(letrec
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;sassy-user-macros is updated with a new hash-table every time
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;sassy is called, but since it keeps the last table around,
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;you can call sassy-expand yourself to see how something got
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;expanded
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((sassy-user-macros (make-hash-table))
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(make-sassy-macro
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(meta-lambda
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(or (and 'lambda __ (lambda x
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(eval `(lambda ,@x)
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(interaction-environment))))
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,@?)))
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(macro? (lambda (x)
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(and (symbol? x)
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(or (hash-table-ref
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sassy-user-macros x (lambda () #f))
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(hash-table-ref
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sassy-internal-macros x (lambda () #f))))))
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(call-macro (lambda (macro-call args)
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(expand (if (procedure? macro-call)
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(apply macro-call args)
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(cons macro-call args)))))
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(do-scheme-call (lambda (scheme-call)
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(expand
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(eval scheme-call
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(interaction-environment)))))
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(symbol-or-expand (lambda (x) (if (pair? x) (expand x) x)))
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(atom? (lambda (x) (not (pair? x))))
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(expand
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(meta-lambda
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(or (and ,@macro? (lambda (constant) (expand constant)))
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,@atom?
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(and 'label symbol-or-expand (* expand)
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(lambda (label rest)
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`(label ,label ,@rest)))
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(and 'locals ((* symbol-or-expand)) (* expand)
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(lambda (decs rest)
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`(locals ,decs ,@rest)))
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(and '! ? (lambda (scheme-call) (do-scheme-call scheme-call)))
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(and 'macro symbol? ?
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(lambda (macro-name macro-body)
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(hash-table-set! sassy-user-macros macro-name
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(make-sassy-macro macro-body))
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'void))
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(and macro? (* expand) (lambda (macro-call args)
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(call-macro macro-call args)))
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(and ((and '! ?)) (* expand)
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(lambda (scheme-call tail)
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(let ((new-head (do-scheme-call scheme-call)))
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(cond ((macro? new-head) =>
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(lambda (mac)
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(call-macro mac tail)))
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((procedure? new-head)
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(call-macro new-head tail))
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(else (cons new-head tail))))))
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(and ? (* expand) (lambda (head tail) (cons head tail)))
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))))
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(lambda (list-or-hashtable)
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(if (hash-table? list-or-hashtable)
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(set! sassy-user-macros list-or-hashtable)
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(expand list-or-hashtable))))))
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