I noticed that this patch has a // comment about it segfaulting. Did you ever figure that out? Is the resulting code the one you intend as final?
Did you make any inroads regarding Jeff Davis' suggestion about implementing "multiranges"? I wonder if that's going to end up being a Pandora's box. Stylistically, the code does not match pgindent's choices very closely. I can return a diff to a pgindented version of your v0002 for your perusal, if it would be useful for you to learn its style. (A committer would eventually run pgindent himself[1], but it's good to have submissions be at least close to the final form.) BTW, I suggest "git format-patch -vN" to prepare files for submission. [1] No female committers yet ... is this 2019? -- Álvaro Herrera https://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services