implicit declarations of move operations, GCC 4.7 would find that SelectPiece
has neither a move constructor nor a copy constructor. The copy constructor was
(correctly) deleted because the class has a member of move-only type, and the
move constructor was (incorrectly, per current C++ rules) not provided because
the class has a copy-only base class (in turn because it explicitly declares a
destructor).
llvm-svn: 281363
/// Diagnostic text, parsed into pieces.
struct DiagText {
struct Piece {
+ // This type and its derived classes are move-only.
+ Piece() = default;
+ Piece(Piece &&O) = default;
+ Piece &operator=(Piece &&O) = default;
+
virtual void print(std::vector<std::string> &RST) = 0;
virtual ~Piece() {}
};