On Sunday, January 26, 2020 at 1:49:15 PM UTC+11, Shane H wrote: > > Hi all, I'm trying to learn how to write a linter (because long weekend, > etc) > > I looked at Fatih's very fine blog post ( > https://arslan.io/2019/06/13/using-go-analysis-to-write-a-custom-linter/) > as well as the one that precedes it, although I was a LOT lost reading that > one. > > Copying and pasting > https://github.com/fatih/addlint/blob/master/addcheck/addcheck.go got me > started, but the linter I have in mind needs to see strings, a trip to > https://golang.org/src/go/token/token.go and > https://golang.org/src/go/ast/ast.go showed me the possibilities. This > (fortunately?) made me switch priorities slightly, as I now want to write > something that is going to print each and every node (and this is where my > problems began). > > I used Fatih's run and render functions but discovered that an error is > being generated for the Doc comment, and I cannot see *why* > (ast.CommentGroup is fine in parts of the code.. except for `func (p > *printer) printNode(node interface{}) error` > (https://golang.org/src/go/printer/printer.go > <https://golang.org/src/go/printer/printer.go> line 1073), the format > node section (lines 1125 - 1155) take me to the unsupported label, which > generates an error > > My code (main.go, lencheck.go, and complete output can be found at > https://play.golang.org/p/olvJ64EDdKZ, please excuse the length of the > paste, I put *everything* in there) > > As you can see in my code there are 4 nodes that throw errors, and I don't > understand if 1) that is intended or 2) I am doing (or not doing as the > case may be) something to cause the issue. > > Any help/pointers appreciated >
I've ended up writing my own print method, that prints the text for the given node. I'm not 100% sure why the format node function is needed for certain nodes, but I also realised I could just print the comments out in my code fairly easily. The reason I need to do it is because the first phase of writing my tool is 'seeing' what the code is seeing, and reacting to. -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/86889841-9f6a-46b3-9ff6-9aae231cfdf4%40googlegroups.com.
