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systemd/coccinelle/empty-to-null.cocci

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/* SPDX-License-Identifier: LGPL-2.1-or-later */
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@@
/* Avoid running this transformation on the empty_to_null function itself */
position p : script:python() { p[0].current_element != "empty_to_null" };
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expression s;
@@
- isempty@p(s) ? NULL : s
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+ empty_to_null(s)