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(compile-only
(load-for (struct sys:param-parser-base "param")))
(defun mac-env-flatten (env)
(when env
(let ((lexvars [mapcar car
[keep-if (op eq 'sys:special)
(env-vbindings env) cdr]]))
(append (mac-env-flatten (env-next env)) lexvars))))
(defun analyze-params (params)
(let* ((env (gensym))
(lam ^(lambda ,params
(macrolet ((,env (:env e)
(set (symbol-value ',env) e)))
(,env))))
(explam (expand lam))
(syms (mac-env-flatten (symbol-value env))))
(list (cadr explam) syms)))
(defun defset-expander-simple (get-fun set-fun)
(ignore set-fun)
(with-gensyms (getter setter params)
^(defplace (,get-fun . ,params) body
(,getter ,setter
(let ((pgens (mapcar (ret (gensym)) ,params)))
^(alet ,(zip pgens (list ,*params))
(macrolet ((,,getter () ^(,',',get-fun ,*',pgens))
(,,setter (val) ^(,',',set-fun ,*',pgens ,val)))
,body)))))))
(defun defset-expander (env macform name params newval setform)
(with-gensyms (getter setter args gpf-pairs gpr-pairs ext-pairs
pgens rgens egens all-pairs agens nvsym)
(let* ((ap (analyze-params params))
(exp-params (car ap))
(total-syms (cadr ap))
(fp (new fun-param-parser form macform syntax exp-params))
(fixpars (append fp.req fp.(opt-syms)))
(restpar (if (symbol-package fp.rest) fp.rest))
(extsyms [keep-if symbol-package
(diff total-syms (cons restpar fixpars))])
(xsetform ^^(alet ((,',nvsym ,,newval))
,,(expand ^(symacrolet ((,newval ',nvsym))
,setform)
env))))
^(defplace (,name . ,args) body
(,getter ,setter
(tree-bind ,params ,args
(let* ((,gpf-pairs (mapcar (op (fun list) (gensym)) (list ,*fixpars)))
(,gpr-pairs (if ',restpar
(if (consp ,restpar)
(mapcar (op (fun list) (gensym)) ,restpar)
(list (list (gensym) ,restpar)))))
(,ext-pairs (mapcar (op (fun list) (gensym)) (list ,*extsyms)))
(,pgens (mapcar (fun car) ,gpf-pairs))
(,rgens (mapcar (fun car) ,gpr-pairs))
(,egens (mapcar (fun car) ,ext-pairs))
(,all-pairs (append ,gpf-pairs ,gpr-pairs ,ext-pairs))
(,agens (collect-each ((a ,args))
(let ((p (pos a ,all-pairs (fun eq) (fun cadr))))
(if p
(car (del [,all-pairs p]))
a)))))
^(alet (,*,gpf-pairs ,*,gpr-pairs ,*,ext-pairs)
,(expand ^(symacrolet (,*(zip ',fixpars
(mapcar (ret ^',@1) ,pgens))
,*(zip ',extsyms
(mapcar (ret ^',@1) ,egens))
,*(if ,gpr-pairs
(if (consp ,restpar)
^((,',restpar ',,rgens))
^((,',restpar ',(car ,rgens))))))
(macrolet ((,,getter () ^(,',',name ,',*,agens))
(,,setter (,',newval)
,',xsetform))
,body))
,env)))))))))
(defmacro usr:defset (:env e :form mf . args)
(tree-case args
((name (. params) newval setform)
(ignore name params newval setform)
(defset-expander e mf . args))
((get-fun set-fun)
(defset-expander-simple get-fun set-fun))
(t (compile-error mf "invalid syntax"))))
(defset sub-list (list : (from 0) (to t)) items
^(progn (set ,list (replace-list ,list ,items ,from ,to)) ,items))
(defset sub-vec (vec : (from 0) (to t)) items
^(progn (replace-vec ,vec ,items ,from ,to) ,items))
(defset sub-str (str : (from 0) (to t)) items
^(progn (replace-str ,str ,items ,from ,to) ,items))
(defset left (node) nleft
^(progn (set-left ,node ,nleft) ,nleft))
(defset right (node) nright
^(progn (set-right ,node ,nright) ,nright))
(defset key (node) nkey
^(progn (set-key ,node ,nkey) ,nkey))
(defmacro set-mask (:env env place . integers)
(with-update-expander (getter setter) place env
^(,setter (logior (,getter) ,*integers))))
(defmacro clear-mask (:env env place . integers)
(with-update-expander (getter setter) place env
^(,setter (logand (,getter) (lognot (logior ,*integers))))))
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