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#ifndef __LIST_CHH__
#define __LIST_CHH__
%define(listSearch,lst,crit,
%locals(length,pos,
%<length=%llength(%lst)>\
%<pos=0>\
%while(%and(%[pos<length],
%not(%crit(%&lst[%pos]))),
%<pos=%[pos+1]>
)\
%if(%[pos<length],
%pos
,
-1
)
))\
\
%define(listIndexOf,lst,val,
%listSearch(%&lst,%lambda(e,%equal(%&e,%&val)))
)\
\
%define(listMap,mapping,lsts:1:,
%locals(newlst,lst,numlsts,
%<newlst=%list()>\
%<numlsts=%llength(%lsts)>\
%for(i,0,%[%llength(%lsts[0]) - 1],1,
%<lst=%list()>\
%for(j,0,%[numlsts - 1],
%lappend(%&lst,%&lsts[%j][%i])
)\
%lappend(%&newlst,%apply(%&mapping,%&lst))
)\
%&newlst
))\
\
%define(listLeftAccumulate,accumulator,lst,zero,
%if(%[%llength(%lst)==0],
%&zero
,
%locals(sum,
%<sum=%&lst[0]>\
%for(i,1,%[%llength(%lst)-1],1,
%<sum=%accumulator(%&sum,%&lst[%i])>
)\
%&sum
)
)
)\
\
%define(listRightAccumulate,accumulator,lst,zero,
%if(%[%llength(%lst)==0],
%&zero
,
%locals(sum,
%<sum=%&lst[%[%llength(%lst)-1]]>\
%for(i,%[%llength(%lst)-2],0,-1,
%<sum=%accumulator(%&lst[%i],%&sum)>
)\
%&sum
)
)
)\
\
%define(listJoin,sep,lst,
%listLeftAccumulate(%lambda(a,b,%a%sep%b),%&lst,%'')
)\
#endif
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