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doc: there is no right shift for integer bitmasks #10282

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doc: there is no right shift for integer bitmasks #10282

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4 changes: 4 additions & 0 deletions doc/userguide/rules/integer-keywords.rst
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Expand Up @@ -71,6 +71,10 @@ Some of these bits have a string/meaning associated to it.
Rules can be written using a list (comma-separated) of these strings,
where each item can be negated.

There is no right shift for trailing zeros applied here (even if there is one
for ``byte_test`` and ``byte_math``). That means a rule with
``websocket.flags:&0xc0=2`` will be rejected as invalid as it can never match.

Examples::

websocket.flags:fin,!comp;
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