u can use infix function with 1arg without any parentheses.
UPD with 2args arg1 `infix func` arg2
latter I told about UFCS with 1arg `UFCS func` arg1
u can use infix function with 1arg without any parentheses.
UPD with 2args arg1 `infix func` arg2
latter I told about UFCS with 1arg `UFCS func` arg1