cmd/godoc: Nested functions on embedded types are only shown 1 level deep.

[klauspost]

Test case: http://play.golang.org/p/9oz7e7AKzd

In the example above A embeds b which embeds c. There are public functions on b, which is shown correctly in godoc as belonging to A. However, it seems like godoc only searches 1 level deep, and functions on c are not shown even though they are valid for calls by the compiler.

Reproducible on 1.4.1 and 1.3.3.

Real life example: source / godoc. A specific query type includes "geoJSONQuery" which includes "query", and I would like to have the functions on "query" to show up. I would however prefer not to expose any of the internal types since they aren't useful themselves.

[griesemer]

Closed as duplicate of #6127.

The problem is that godoc is using a heuristic and doesn't do much searching in the first place.

Doing this correctly in all cases with go/types integration is a significant chunk of work and thus an open issue.