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/* Copyright Vladimir Prus 2003. Distributed under the Boost */
/* Software License, Version 1.0. (See accompanying */
/* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) */
#include "../native.h"
#include "../object.h"
/*
local result = ;
local element ;
for element in $(B)
{
if ! ( $(element) in $(A) )
{
result += $(element) ;
}
}
return $(result) ;
*/
LIST *set_difference( FRAME *frame, int flags )
{
LIST* b = lol_get( frame->args, 0 );
LIST* a = lol_get( frame->args, 1 );
LIST* result = L0;
LISTITER iter = list_begin( b ), end = list_end( b );
for( ; iter != end; iter = list_next( iter ) )
{
if (!list_in(a, list_item(iter)))
result = list_push_back(result, object_copy(list_item(iter)));
}
return result;
}
void init_set()
{
{
const char* args[] = { "B", "*", ":", "A", "*", 0 };
declare_native_rule("set", "difference", args, set_difference, 1);
}
}
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