jiridanek commented on code in PR #408:
URL: https://github.com/apache/qpid-proton/pull/408#discussion_r1365547136
##########
c/include/proton/annotations.h:
##########
@@ -90,4 +90,24 @@
#endif
#endif
+// fallthrough
+#if defined __cplusplus && defined __has_cpp_attribute
+ #if __has_cpp_attribute(fallthrough) && __cplusplus >=
__has_cpp_attribute(fallthrough)
+ #define PN_FALLTHROUGH [[fallthrough]]
+ #endif
+#endif
+#if !defined PN_FALLTHROUGH && defined __STDC_VERSION__ && defined
__has_c_attribute
+ #if __has_c_attribute(fallthrough) && __STDC_VERSION__ >=
__has_c_attribute(fallthrough)
+ #define PN_FALLTHROUGH [[fallthrough]]
+ #endif
+#endif
+#if !defined PN_FALLTHROUGH && defined __has_attribute
Review Comment:
no, because we might be on older c that has a __has_c_attribute but not the
[[fallthrough]];, so we would go into
```
#if !defined PN_FALLTHROUGH && defined __STDC_VERSION__ && defined
__has_c_attribute
````
but not define PN_FALLTHROUGH there
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