Signed-off-by: YAMAMOTO Takashi <[email protected]>
---
CodingStyle | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/CodingStyle b/CodingStyle
index c9b9989..d1ef65b 100644
--- a/CodingStyle
+++ b/CodingStyle
@@ -541,6 +541,11 @@ C DIALECT
* bool and <stdbool.h>, but don't assume that bool or _Bool can
only take on the values 0 or 1, because this behavior can't be
simulated on C89 compilers.
+ Also, don't assume that a conversion to bool or _Bool follows
+ C99 semantics. I.e. use "(bool)(some_value != 0)" rather than
+ "(bool)some_value". The latter might produce unexpected results
+ on non-C99 environments. For example, if bool is implemented as
+ a typedef of char and some_value = 0x10000000.
* Designated initializers (e.g. "struct foo foo = {.a = 1};" and
"int a[] = {[2] = 5};").
--
1.9.4
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