go/ast: hide unexported fields in composite literals
In ast/ast.go, added an Incomplete field inside CompositeLit
to denote that fields are missing.
In ast/filter.go, added a new function to go through the expression list
checking for KeyValue expressions inside composite literals.
Filter out entries with an unexported key.
In printer/nodes.go, checking if the Incomplete field is set,
and accordingly print the filtered message with proper indentation.
Copying over similar functionality in doc/exports.go so as to
maintain parity with ast/filter.go and such that godoc
can show the output correctly.
Fixes #22803
Change-Id: I57a3b999521933e32411a18e02d0b94d2ea2e6f6
Reviewed-on: https://go-review.googlesource.com/106395
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Robert Griesemer <gri@golang.org>