https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102439
Bug ID: 102439
Summary: deprecated attributes do not work on struct/class if
type is auto deduced
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: spaun2002 at protonmail dot com
Target Milestone: ---
The following code compiles with no warnings/errors by all gcc versions that
support std=c++14.
The same code does not compile by clang or msvc compilers (the latter was run
with /W4 /WX arguments and without __attribute__ part).
If I uncomment type_v1 const a = type_v1{10}; then gcc properly fails to
compile.
Expected behavior: gcc emits warning on `auto a = type_v1{10}` line.
// gcc -Wall --pedantic -std=c++14 -Wattributes -Wdeprecated-declarations
-Werror
#include <iostream>
struct [[deprecated]] type_v1 {
int a;
} __attribute__ ((__deprecated__));
int main() {
auto a = type_v1{10}; // this one should not compile
//type_v1 a = type_v1{10}; // rightfully fails to compile
std::cout << a.a << std::endl;
return 0;
}
