How recent an innovation this is depends on your language. It was added in C++11 so it looks recent there. But the syntax was in Perl 4 back in 1991. And som

How recent an innovation this is depends on your language. It was added in C++11 so it looks recent there. But the syntax was in Perl 4 back in 1991. And someone who knows programming history can probably find older examples still in other languages.