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* [Bug c++/116012] New: gcc allows calling to implicitly-deleted default constructor in virtual inheritance with inherited constructor by using-declaration
@ 2024-07-20 9:53 rush102333 at gmail dot com
2024-07-20 20:15 ` [Bug c++/116012] " pinskia at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: rush102333 at gmail dot com @ 2024-07-20 9:53 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116012
Bug ID: 116012
Summary: gcc allows calling to implicitly-deleted default
constructor in virtual inheritance with inherited
constructor by using-declaration
Product: gcc
Version: 13.2.0
Status: UNCONFIRMED
Keywords: accepts-invalid
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: rush102333 at gmail dot com
Target Milestone: ---
The following code is accepted by gcc but rejected by clang, MSVC and EDG：
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
struct base {
base(int) {}
virtual void foo() = 0;
virtual ~base() {}
};
struct left : virtual base {
public:
using base:: base;
};
struct derived : left{
virtual void foo() override {}
derived() : base(10) {}
};
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Because struct "left" inherits the constructors of its base class "base", it
has had a valid user-defined ctor. The defaulted ctor should then be deleted,
so the constructor's declaration of struct "derived" should be invalid.
Clang gives the following error message:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<source>:15:5: error: call to implicitly-deleted default constructor of 'left'
15 | derived() : base(10) {}
| ^
1 error generated.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Please check https://godbolt.org/z/znbY1E4ro
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug c++/116012] gcc allows calling to implicitly-deleted default constructor in virtual inheritance with inherited constructor by using-declaration
2024-07-20 9:53 [Bug c++/116012] New: gcc allows calling to implicitly-deleted default constructor in virtual inheritance with inherited constructor by using-declaration rush102333 at gmail dot com
@ 2024-07-20 20:15 ` pinskia at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-07-20 20:15 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116012
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2024-07-20
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2024-07-20 9:53 [Bug c++/116012] New: gcc allows calling to implicitly-deleted default constructor in virtual inheritance with inherited constructor by using-declaration rush102333 at gmail dot com
2024-07-20 20:15 ` [Bug c++/116012] " pinskia at gcc dot gnu.org
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