https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124059
Bug ID: 124059
Summary: [[deprecated]] operator fails to warn when
constructing shared pointer
Product: gcc
Version: 15.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: nwgllspe at memphis dot edu
Target Milestone: ---
Created attachment 63643
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=63643&action=edit
Test source
The following code produces deprecation warnings in two different constructors
but not third involving shared pointer. I was able to get all warnings for
clang++ but not g++.
$ cat main.cpp && g++ -Wall -Wextra main.cpp && ./a.out
#include <iostream>
#include <memory>
struct Test {
[[deprecated]]
operator int() { return 1; }
};
struct Test2 {
Test2(int i) { std::cout << "Test2 constructor called" << std::endl; }
};
int main() {
auto t = Test();
auto t1 = Test2(t); // warning
std::shared_ptr<Test2> t2(new Test2(t)); // warning
auto t3 = std::make_shared<Test2>(t); // No warning
return 0;
}
main.cpp: In constructor ‘Test2::Test2(int)’:
main.cpp:10:15: warning: unused parameter ‘i’ [-Wunused-parameter]
10 | Test2(int i) { std::cout << "Test2 constructor called" <<
std::endl; }
| ~~~~^
main.cpp: In function ‘int main()’:
main.cpp:16:21: warning: ‘Test::operator int()’ is deprecated
[-Wdeprecated-declarations]
16 | auto t1 = Test2(t); // warning
| ^
main.cpp:6:5: note: declared here
6 | operator int() { return 1; }
| ^~~~~~~~
main.cpp:17:41: warning: ‘Test::operator int()’ is deprecated
[-Wdeprecated-declarations]
17 | std::shared_ptr<Test2> t2(new Test2(t)); // warning
| ^
main.cpp:6:5: note: declared here
6 | operator int() { return 1; }
| ^~~~~~~~
main.cpp:16:10: warning: variable ‘t1’ set but not used
[-Wunused-but-set-variable]
16 | auto t1 = Test2(t); // warning
| ^~
Test2 constructor called
Test2 constructor called
Test2 constructor called
