Hi Qingwei Li, The gopls server can already answer such queries. However it is up to your editor (the client of the language server) to make the query in the first place.
It may help to review https://en.wikipedia.org/wiki/Language_Server_Protocol or https://microsoft.github.io/language-server-protocol/ to understand the role of the client and the role of the server. You probably need to add a new gopls query to your editor, or ask its authors for such a feature if it is not open source. Kind regards, Jason ~/go/pkg/mod/github.com/glycerine/[email protected] $ gopls definition walk.go:154:31 ~/go/pkg/mod/github.com/glycerine/[email protected]/walk.go:37:6-14: defined here as type WalkFunc func(path string, info os.FileInfo, hasSubDir bool, err error) error WalkFunc is the type of the function called for each file or directory visited by Walk. The path argument contains the argument to Walk as a prefix; that is, if Walk is called with "dir", which is a directory containing the file "a", the walk function will be called with argument "dir/a". The info argument is the os.FileInfo for the named path. If there was a problem walking to the file or directory named by path, the incoming error will describe the problem and the function can decide how to handle that error (and Walk will not descend into that directory). If an error is returned, processing stops. The sole exception is that if path is a directory and the function returns the special value SkipDir, the contents of the directory are skipped and processing continues as usual on the next file. $ On Tuesday, November 4, 2025 at 1:06:54 PM UTC Qingwei Li wrote: > Hello. I'm here to propose an idea for gopls. The idea is that when we > hover over `func` token of a function literal whose type is documented, the > documentation of the type can be shown. > > The motivating example is as follows: > > filepath.WalkDir(dir, func(path string, d os.DirEntry, err error) error { > ... > } > > When I am coding filepath.WalkDir, whose signature is `func > filepath.WalkDir(root string, fn fs.WalkDirFunc) error`, I don't know > what's the meaning of the third parameter `err` of `fs.WalkDirFunc`. I have > to go to the browser to see documentation or ask LLM. > > If we can decide the type of function literal is `fs.WalkDirFunc` and if > `fs.WalkDirFunc` is documented, can we show documentation when hovering > over `func` token? This is a similar behavior like hovering over function > name of a call statement I think. > > > -- 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 [email protected]. To view this discussion visit https://groups.google.com/d/msgid/golang-nuts/4ec2e270-3045-4292-bcba-2b27ef68f873n%40googlegroups.com.
