tree d02477711d9df6ff7f8139a1edd522cf11cd5994
parent 5ab06b02d60653d5a5220fb2d99064055da3bdbd
author Dmitri Shuralyov <dmitshur@golang.org> 1612327104 -0500
committer Dmitri Shuralyov <dmitshur@golang.org> 1612829452 +0000

godoc: show earliest version when identifier was added

CL 85396 implemented parsePackageAPIInfo with the idea that each
identifier shows up in exactly one of api/go*.txt files, when it
was added. We now know that it may show up more than once, when
the signature changes (generally in a compatible way, such as
when existing types are replaced with aliases to an equivalent
type).

Modify the algorithm to parse the api/go*.txt files in reverse
order, in order to find and display the earliest Go version when
each identifier was first added.

Fixes golang/go#44081.
Updates golang/go#5778.

Change-Id: I83171fd8c161d703f284011375d74b824c279d41
Reviewed-on: https://go-review.googlesource.com/c/tools/+/289089
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>