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sys: util: Accept empty FOR_EACH

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The ## part of ##__VA_ARGS__ in the Z_FOR_EACH_ENGINE macro technically
breaks the invocation of empty FOR_EACH sequences, as the empty
__VA_ARGS__ gets squashed with in the invocation of Z_FOR_LOOP_1() in
Z_FOR_LOOP_2(), which makes the macro only pass 4 arguments to
Z_FOR_LOOP_1.

This breaks IntelliSense in Microsoft's C/C++ extension for VS Code,
which is strict about the amount of arguments you can pass to a variadic
macro.

Signed-off-by: Krzysztof Chruściński <krzysztof.chruscinski@nordicsemi.no>
Signed-off-by: Trond Einar Snekvik <Trond.Einar.Snekvik@nordicsemi.no>
This commit is contained in:
Trond Einar Snekvik 2022-06-14 10:41:39 +02:00 committed by Carles Cufí
parent 2a93e06fba
commit aae51921df
1 changed files with 1 additions and 1 deletions
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2
include/zephyr/sys/util_loops.h
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@ -408,7 +408,7 @@
Z_FOR_LOOP_3, \
Z_FOR_LOOP_2, \
Z_FOR_LOOP_1, \
Z_FOR_LOOP_0)(x, sep, fixed_arg0, fixed_arg1, ##__VA_ARGS__)
Z_FOR_LOOP_0)(x, sep, fixed_arg0, fixed_arg1, __VA_ARGS__)
#define Z_GET_ARG_1(_0, ...) _0