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enumerate.pmc
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enumerate.pmc
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/*
Copyright (C) 2001-2008, The Perl Foundation.
$Id$
=head1 NAME
src/pmc/enumerate.pmc - enumerate PMC
=head1 DESCRIPTION
This is an Iterator which returns [idx, item] tuples.
=head2 Methods
=over 4
=cut
*/
#include "parrot/parrot.h"
pmclass Enumerate extends Iterator no_ro {
VTABLE void init_pmc(PMC *iterable) {
SUPER(iterable);
PMC_struct_val(SELF) = key_new_integer(INTERP, 0);
PMC_pmc_val(SELF) = VTABLE_get_iter(INTERP, iterable);
}
/*
=item C<PMC *shift_pmc()>
Returns [idx, element] for the current idx/key and sets the idx/key to
the next one.
=cut
*/
VTABLE INTVAL get_bool() {
PMC *key = (PMC *)PMC_struct_val(SELF);
PMC *iter = PMC_pmc_val(SELF);
INTVAL ok = PMC_int_val(key) >= 0 && VTABLE_get_bool(INTERP, iter);
if (!ok)
PMC_int_val(key) = -1;
return ok;
}
VTABLE PMC *shift_pmc() {
PMC *item, *tupl, *val;
PMC *key = (PMC *)PMC_struct_val(SELF);
PMC *iter = PMC_pmc_val(SELF);
INTVAL i = PMC_int_val(key);
if (i == -1)
Parrot_ex_throw_from_c_args(INTERP, NULL, EXCEPTION_OUT_OF_BOUNDS,
"StopIteration");
item = VTABLE_shift_pmc(INTERP, iter);
tupl = pmc_new(INTERP, enum_class_FixedPMCArray);
++PMC_int_val(key);
VTABLE_set_integer_native(INTERP, tupl, 2);
val = pmc_new(INTERP, enum_class_Integer);
PMC_int_val(val) = i;
VTABLE_set_pmc_keyed_int(INTERP, tupl, 0, val);
VTABLE_set_pmc_keyed_int(INTERP, tupl, 1, item);
return tupl;
}
VTABLE PMC *get_iter() {
return SELF;
}
}
/*
=back
=cut
*/
/*
* Local variables:
* c-file-style: "parrot"
* End:
* vim: expandtab shiftwidth=4:
*/