[dcl.stc]
Change: Removal of register storage-class-specifier.
Rationale: Enable repurposing of deprecated keyword in future revisions of this International Standard.
Effect on original feature:
A valid C++ 2014 declaration utilizing the register
storage-class-specifier is ill-formed in this International Standard.
The specifier can simply be removed to retain the original meaning.
[dcl.spec.auto]
Change: auto deduction from braced-init-list.
Rationale: More intuitive deduction behavior.
Effect on original feature:
Valid C++ 2014 code may fail to compile or may change meaning
in this International Standard. For example:
auto x1{1}; // was std::initializer_list<int>, now int
auto x2{1, 2}; // was std::initializer_list<int>, now ill-formed