tree bd1916900be6a76cec3f3cf785a0c9598aee0100
parent db6008cb90f09485deb11255e5dd6da114b4ecef
author Alan Donovan <adonovan@google.com> 1741061181 -0500
committer Gopher Robot <gobot@golang.org> 1741204764 -0800

gopls/internal/golang: Implementations for func types

This CL adds support to the Implementations query for function
types. The query relates two sets of locations:

  1. the "func" token of each function declaration (FuncDecl or
     FuncLit). These are analogous to declarations of concrete
     methods.

  2. uses of abstract functions:

     (a) the "func" token of each FuncType that is not part of
     Func{Decl,Lit}. These are analogous to interface{...} types.

     (b) the "(" paren of each dynamic call on a value of an
     abstract function type. These are analogous to references to
     interface method names, but no names are involved, which has
     historically made them hard to search for.

An Implementations query on a location in set 1 returns set 2,
and vice versa.

Only the local algorithm is implemented for now; the global
one (using an index analogous to methodsets) will follow.

This CL supersedes CL 448035 and CL 619515, both of which attempt
to unify the treatment of functions and interfaces in the methodsets
algorithm and in the index; but the two problems are not precisely
analogous, and I think we'll end up with more but simpler code
if we implement themn separately.

+ tests, docs, relnotes

Updates golang/go#56572

Change-Id: I18e1a7cc2f6c320112b9f3589323d04f9a52ef3c
Reviewed-on: https://go-review.googlesource.com/c/tools/+/654556
Commit-Queue: Alan Donovan <adonovan@google.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Alan Donovan <adonovan@google.com>