https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86580
Bug ID: 86580
Summary: No warning for default arguments
Product: gcc
Version: 9.0
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:
struct S { S(const S&, int); S(int); }; S::S(const S& = S(0), int = 0) {}
g++ accepts without any warning messages. Instead, clang++ reports:
code0.cpp:1:55: error: addition of default argument on redeclaration makes
this constructor a default constructor
struct S { S(const S&, int); S(int); }; S::S(const S& = S(0), int = 0) {}
^ ~~~~
code0.cpp:1:12: note: previous declaration is here
struct S { S(const S&, int); S(int); }; S::S(const S& = S(0), int = 0) {}
^
1 error generated.
