go/doc, godoc: move export filtering into go/doc
- exports.go contains a stripped-down (but semantically unchanged)
version of the code in go/ast/filter.go for export filtering
- filter.go contains the documentation filtering code found before
at the end of doc.go; this is simply a code move w/o any semantic
changes
- godoc now relies on go/doc for export filtering when creating
documentation. It still has a separate form of export filtering
for showing the source code version. This needs to be consolidated
(perhaps the source form view should just be removed?).
- Stripping of function bodies (stripFunctionBodies function of
godoc.go) is now happening in doc.go (line 176).
- doc.NewPackageDoc has an extra parameter "exportsOnly. If set
to false, the behavior is as before. This function is only called
once in our source code; a gofix module is probably not warranted.
- Deleted doc.NewFileDoc - was never called.
This change is mostly a code move w/ some minimal tweaks. It should
not cause any changes to the behavior of godoc. It's a prerequisite
for extracting anonymous embedded fields.
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/
5502072