Andrew Gierth <andrew@tao11.riddles.org.uk> writes:
> My opinion is that the gist-implementation section of the docs needs
> to be substantially expanded so that it explains, for each support
> function, exactly what the function is expected to do.
Yes, the GIST (and GIN) parts of the docs are really pretty bad.
> If it would help, I'm prepared to put some time towards actually
> writing something up for this.
That would be outstanding.
regards, tom lane