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author | Kaz Kylheku <kaz@kylheku.com> | 2019-02-28 19:17:47 -0800 |
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committer | Kaz Kylheku <kaz@kylheku.com> | 2019-02-28 19:17:47 -0800 |
commit | ec967106802e4007fd1d5f66219eafa3fa268053 (patch) | |
tree | 5395b04049d47b971de5bd978c7bbfc7b0744d65 /share/txr/stdlib/param.tl | |
parent | b506c5f239d413745875e564b3a34aa6f18f3a4e (diff) | |
download | txr-ec967106802e4007fd1d5f66219eafa3fa268053.tar.gz txr-ec967106802e4007fd1d5f66219eafa3fa268053.tar.bz2 txr-ec967106802e4007fd1d5f66219eafa3fa268053.zip |
compiler: move parameter parsing to separate file.
Some upcoming work is going to use these structures.
* share/txr/stdlib/compiler.tl (param-parser-base
fun-param-parser, mac-param-parser): These struct
definitions move to param.tl.
* share/txr/stdlib/param.tl: New file.
Diffstat (limited to 'share/txr/stdlib/param.tl')
-rw-r--r-- | share/txr/stdlib/param.tl | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/share/txr/stdlib/param.tl b/share/txr/stdlib/param.tl new file mode 100644 index 00000000..2128a9d4 --- /dev/null +++ b/share/txr/stdlib/param.tl @@ -0,0 +1,64 @@ +;; Copyright 2019 +;; 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. + +(compile-only + (defstruct param-parser-base nil + syntax form + rest req opt key + nreq nopt nfix + + (:postinit (me) + (let* ((rest (nthlast 0 me.syntax)) + (fixed (ldiff me.syntax rest)) + nonkey key) + (cond + (me.mac-param-p + (while fixed + (let ((pp (pop fixed))) + (caseq pp + ((:env :whole :form) + (unless fixed + (compile-error me.form "~s requires argument" pp)) + (push (cons pp (pop fixed)) key)) + (t (push pp nonkey))))) + (set nonkey (nreverse nonkey) + key (nreverse key))) + (t (set nonkey fixed))) + (tree-bind (: rp opt) (split* nonkey (op where (op eq :))) + (set me.rest rest + me.req rp + me.opt (mapcar [iffi atom list] opt) + me.key key + me.nreq (len rp) + me.nopt (len opt) + me.nfix (+ me.nreq me.nopt)))))) + + (defstruct (fun-param-parser syntax form) param-parser-base + (mac-param-p nil)) + + (defstruct (mac-param-parser syntax form) param-parser-base + (mac-param-p t))) + |