def list_pop(context, builder, sig, args):
inst = ListInstance(context, builder, sig.args[0], args[0])
n = inst.size
cgutils.guard_zero(context, builder, n, (IndexError, "pop from empty list"))
n = builder.sub(n, ir.Constant(n.type, 1))
res = inst.getitem(n)
inst.incref_value(res) # incref the pop'ed element
inst.clear_value(n) # clear the storage space
inst.resize(n)
return impl_ret_new_ref(context, builder, sig.return_type, res)
def list_pop(context, builder, sig, args):
inst = ListInstance(context, builder, sig.args[0], args[0])
idx = inst.fix_index(args[1])
n = inst.size
cgutils.guard_zero(context, builder, n, (IndexError, "pop from empty list"))
inst.guard_index(idx, "pop index out of range")
res = inst.getitem(idx)
one = ir.Constant(n.type, 1)
n = builder.sub(n, ir.Constant(n.type, 1))
inst.move(idx, builder.add(idx, one), builder.sub(n, idx))
inst.resize(n)
return impl_ret_new_ref(context, builder, sig.return_type, res)
