https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80599
Bug ID: 80599
Summary: -Wuseless-cast triggers for inherited constructor
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jens.maurer at gmx dot net
Target Milestone: ---
All-new gcc 7.1.0 delivers a -Wuseless-cast warning for inherited constructors
involving reference parameters that the user cannot do anything about. This
did not happen with gcc 6.3.0.
struct B {
B(const int&);
};
struct D : B {
using B::B;
};
D d2 = 0;
$ g++ -Wuseless-cast -c y.cc
y.cc: In constructor ‘D::D(const int&) [inherited from B]’:
y.cc:6:12: warning: useless cast to type ‘const int&’ [-Wuseless-cast]
using B::B;
^
y.cc: At global scope:
y.cc:9:8: note: synthesized method ‘D::D(const int&) [inherited from B]’ first
required here
D d2 = 0;
^
