https://bugs.llvm.org/show_bug.cgi?id=47246
Bug ID: 47246
Summary: errors of implicitly-deleted default constructor
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: C++
Assignee: unassignedclangb...@nondot.org
Reporter: tangyix...@mail.dlut.edu.cn
CC: blitzrak...@gmail.com, dgre...@apple.com,
erik.pilking...@gmail.com, llvm-bugs@lists.llvm.org,
richard-l...@metafoo.co.uk
The following code(valid) is accepted by g++, clang++ rejects it:
$ cat s.C
template<typename T>
struct A
{
A() = default;
A(A&&) = default;
A(const A&) = default;
T t;
};
struct B {
B() = default;
B(const B&){}
B(B&&) = default;
};
typedef A<const B> C;
C get() { return C(); }
int main() {}
$ clang++ -c s.C
s.C:18:18: error: call to implicitly-deleted default constructor of 'C' (aka
'A<const B>')
C get() { return C(); }
^
s.C:4:3: note: explicitly defaulted function was implicitly deleted here
A() = default;
^
s.C:7:5: note: default constructor of 'A<const B>' is implicitly deleted
because field 't' of const-qualified type 'const B' would not be initialized
T t;
^
1 error generated.
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