https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94379
Bug ID: 94379
Summary: Feature request: like clang, support
__attribute((__warn_unused_result__)) on structs,
unions, and enums
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: pskocik at gmail dot com
Target Milestone: ---
Clang supports applying the warn_unused_result attribute to enums, structs, and
unions, which has the effect that functions returning such an attributed
enum/struct/union behaves as if it itself had the warn_unused_result attribute.
Example:
typedef struct __attribute__((__warn_unused_result__)) aStructType{ int x; }
aStructType;
aStructType getStruct(void);
typedef union __attribute__((__warn_unused_result__)) aUnionType{ int x; }
aUnionType;
aUnionType getUnion(void);
typedef enum __attribute__((__warn_unused_result__)) anEnumType{
anEnumarationConstant } anEnumType;
anEnumType getEnum(void);
int main()
{
getEnum();
getStruct();
getUnion();
}
// https://gcc.godbolt.org/z/jyHhLx
I find this to be a very useful feature, and it would be nice if gcc had it
(along with its current un-void-able warn_unused_result
(https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66425)).
