Undoc'd Feature?

[Albert Chan]

(07-10-2022 05:22 AM)Wes Loewer Wrote:  But what jte was saying is that this used to be undefined, but starting with C++17 it is now defined.

Defined to what? (a=a++) ⇒ NOP?

(07-10-2022 05:36 PM)toml_12953 Wrote:  Is the combination of definition and assignment in one step new to C?

It was always allowed, ever since K&R days.

The C Programming Language, 2nd Edition, page 86 Wrote:In effect, initializations of automatic variables are just shorthand for assignment statements. Which form to prefer is largely a matter of taste. We have generally used explicit assignments, because initializers in declarations are harder to see and further away from the point of use.