[llvm-bugs] [Bug 37862] call to implicitly-deleted default constructor

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=37862

Richard Smith <richard-llvm at metafoo.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |richard-llvm at metafoo.co.uk
         Resolution|---                         |INVALID
             Status|NEW                         |RESOLVED

--- Comment #1 from Richard Smith <richard-llvm at metafoo.co.uk> ---
[class.ctor]p5:

"A defaulted default constructor for class X is defined as deleted if [...] any
non-variant non-static data member of const-qualified type (or array thereof)
with no brace-or-equal-initializer does not have a user-provided default
constructor"

... as clang explains in its diagnostic (which you truncated):

W get() { return W(); } // Line 19
                 ^
<stdin>:4:2: note: explicitly defaulted function was implicitly deleted here
 wrap() = default;
 ^
<stdin>:8:4: note: default constructor of 'wrap<const S>' is implicitly deleted
because field 't' of const-qualified type 'const S' would not be initialized
 T t;
   ^

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