tree aa542649568b830364067b2d97ed92937cd7fa39
parent 93eecc3576be04bf4c262289a280dfe13690c317
author Peter Weinbergr <pjw@google.com> 1598014211 -0400
committer Peter Weinberger <pjw@google.com> 1599245867 +0000

internal/lsp: add support for RelatedInformation in diagnostics

The type checker sometimes emits secondary diagnostics. For instance,
if a function is defined twice, then when it sees the second definition
it emits a diagnostic at the second definition and a secondary diagnostic
pointing to the first diagnostic. Presently gopls treats these as two
separate diagnostics. The changed code still produces two diagnostics,
but now the secondary diagnostic is also converted into a
RelatedInformation so the user sees a xpointer to the earlier definition.

Updates https://github.com/golang/go/issues/39062.

Change-Id: Ic421ec91d2b46c28681ab3ec010d5b02c0442e68
Reviewed-on: https://go-review.googlesource.com/c/tools/+/251617
Run-TryBot: Peter Weinberger <pjw@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>