Re: Do not use C++ style comments (// comments). Strict ANSI C compilers do not accept them.

Peter Eisentraut <peter.eisentraut@2ndquadrant.com> writes:
> PostgreSQL 12 requires C99, so those guidelines should probably be
> rephrased from "because old compilers don't accept it" to "because we
> like it that way".

Yeah, or more formally "to encourage consistent coding style".

            regards, tom lane