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| author | Kaz Kylheku <kaz@kylheku.com> | 2016-09-11 18:42:00 -0700 |
|---|---|---|
| committer | Kaz Kylheku <kaz@kylheku.com> | 2016-09-11 18:42:00 -0700 |
| commit | 7b28c795b04bef5328b64fa50498d13d8a642e3b (patch) | |
| tree | 3bfb45cc0220ef144a858fc24ce7814b251887fc /share | |
| parent | 41491701550523a649c256a10a4748030423f427 (diff) | |
| download | txr-7b28c795b04bef5328b64fa50498d13d8a642e3b.tar.gz txr-7b28c795b04bef5328b64fa50498d13d8a642e3b.tar.bz2 txr-7b28c795b04bef5328b64fa50498d13d8a642e3b.zip | |
New alet macro.
* lisplib.c (place_set_entries): Add alet symbol to autoload
list for place.tl.
* share/txr/stdlib/place.tl (alet): New macro.
* txr.1: Documented alet.
Diffstat (limited to 'share')
| -rw-r--r-- | share/txr/stdlib/place.tl | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/share/txr/stdlib/place.tl b/share/txr/stdlib/place.tl index 74b5b01d..4d5e63dd 100644 --- a/share/txr/stdlib/place.tl +++ b/share/txr/stdlib/place.tl @@ -133,6 +133,12 @@ (defmacro slet (bindings :env e . body) (sys:r-s-let-expander bindings body e [orf constantp bindable])) +(defmacro alet (bindings :env e . body) + (let ((exp-bindings (mapcar (aret ^(,@1 ,(macroexpand @2 e))) bindings))) + ^(,(if [all exp-bindings [orf constantp bindable] second] + 'symacrolet 'let) + ,exp-bindings ,*body))) + (defmacro with-gensyms (syms . body) ^(let ,(zip syms (repeat '((gensym)))) ,*body)) |