https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86250
Bug ID: 86250
Summary: addition of default argument on redeclaration makes
this constructor a default constructor
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: zhonghao at pku dot org.cn
Target Milestone: ---
The code is as follow:
//#include <iostream>
//using namespace std;
class Z {
public:
// gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release) allows to
// write Z(int) while gcc version 2.97 20010205 wants Z(int j=43)
Z(int);
//void print ();
private:
int i;
};
Z::Z(int j=43): i(j){}
//void Z::print(void){ cout << "Z : i= " << i << ".\n";}
int main()
{
Z zobject=Z();
//zobject.print();
}
clang++ rejects, and produces the following error messages:
error: addition of default argument on redeclaration makes this constructor a
default constructor
Z::Z(int j=43): i(j){}
^ ~~
note: previous declaration is here
A previous version of gcc also rejects the code. The bug report is
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=2189
I reported this problem to clang: https://bugs.llvm.org/show_bug.cgi?id=37869
Richard Smith determined that the test case is ill-formed. So, is this a bug in
gcc, since it accepts ill-formed code?
