https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67054
Bug ID: 67054
Summary: Constructor inheritance with non-default constructible
members
Product: gcc
Version: 5.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: alltaken380 at gmail dot com
Target Milestone: ---
Created attachment 36086
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36086&action=edit
Preprocessed source code
Following code won't compile:
struct NonDefault
{
NonDefault(int) {}
};
struct Base
{
Base(int) {}
};
struct Derived : public Base
{
NonDefault foo = 4;
using Base::Base;
};
auto test()
{
auto d = Derived{ 5 };
}
$ g++ -std=c++14 -c test.cpp
test.cpp: In function ‘auto test()’:
test.cpp:20:25: error: use of deleted function ‘Derived::Derived(int)’
auto d = Derived{ 5 };
^
test.cpp:15:17: note: ‘Derived::Derived(int)’ is implicitly deleted because the
default definition would be ill-formed:
using Base::Base;
^
test.cpp:15:17: error: no matching function for call to
‘NonDefault::NonDefault()’
test.cpp:3:5: note: candidate: NonDefault::NonDefault(int)
NonDefault(int) {}
^
test.cpp:3:5: note: candidate expects 1 argument, 0 provided
test.cpp:1:8: note: candidate: constexpr NonDefault::NonDefault(const
NonDefault&)
struct NonDefault
^
test.cpp:1:8: note: candidate expects 1 argument, 0 provided
test.cpp:1:8: note: candidate: constexpr NonDefault::NonDefault(NonDefault&&)
test.cpp:1:8: note: candidate expects 1 argument, 0 provided
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /build/gcc-multilib/src/gcc-5.2.0/configure --prefix=/usr
--libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --enable-multilib --disable-werror
--enable-checking=release --with-default-libstdcxx-abi=gcc4-compatible
Thread model: posix
gcc version 5.2.0 (GCC)
