I think the earliest use I can remember is with the experimental FC++ library[1], circa 2001.
[1] https://yanniss.github.io/fc++/
Well, of course boost has it, they use `<` and `>`:
[1] https://www.boost.org/doc/libs/1_78_0/libs/hof/doc/html/incl...
I think the earliest use I can remember is with the experimental FC++ library[1], circa 2001.
[1] https://yanniss.github.io/fc++/