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| author | Kaz Kylheku <kaz@kylheku.com> | 2017-01-04 22:31:03 -0800 |
|---|---|---|
| committer | Kaz Kylheku <kaz@kylheku.com> | 2017-01-04 22:31:03 -0800 |
| commit | eaebe42f734d31e1f1c44802ad315f004c126ddc (patch) | |
| tree | d154f2f9ff30048944d88b53fbc3eea0b7622155 /share | |
| parent | 65f31ed7d51a9b0dd79ec9c30355fb2f3929fe49 (diff) | |
| download | txr-eaebe42f734d31e1f1c44802ad315f004c126ddc.tar.gz txr-eaebe42f734d31e1f1c44802ad315f004c126ddc.tar.bz2 txr-eaebe42f734d31e1f1c44802ad315f004c126ddc.zip | |
New Lisp feature: param list expander.
* eval.c (pm_table): New static variable.
(expand_param_macro): New static function.
(expand_params): Expand parameter list macros via
expand_param_macro.
(eval_init): gc-protect pm_table and initialize it.
Register *param-macro* variable.
* lisplib.v (pmac_set_entries, pmac_instantiate): New static
functions.
(lisplib_init): Register autoloading of pmac.tl via new
functions.
* share/txr/stdlib/pmac.tl: New file.
* txr.1: Notes under defun, lambds, flet/labels and defmacro
about the existence of parameter macros which add to
the syntax. New Parameter List Macros section.
Documented *param-macro* and define-param-expander.
Diffstat (limited to 'share')
| -rw-r--r-- | share/txr/stdlib/pmac.tl | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/share/txr/stdlib/pmac.tl b/share/txr/stdlib/pmac.tl new file mode 100644 index 00000000..1a93d21e --- /dev/null +++ b/share/txr/stdlib/pmac.tl @@ -0,0 +1,34 @@ +;; Copyright 2017 +;; Kaz Kylheku <kaz@kylheku.com> +;; Vancouver, Canada +;; All rights reserved. +;; +;; Redistribution and use in source and binary forms, with or without +;; modification, are permitted provided that the following conditions are met: +;; +;; 1. Redistributions of source code must retain the above copyright notice, this +;; list of conditions and the following disclaimer. +;; +;; 2. Redistributions in binary form must reproduce the above copyright notice, +;; this list of conditions and the following disclaimer in the documentation +;; and/or other materials provided with the distribution. +;; +;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND +;; ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +;; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +;; DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE +;; FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR +;; SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +;; CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, +;; OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +;; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +(defmacro define-param-expander (keyword + (parms body : (env (gensym)) (form (gensym))) + . forms) + ^(progn + (set [*param-macro* ,keyword] + (lambda (,parms ,body ,env ,form) + ,*forms)) + ,keyword)) |