:GoImpl is unable to implement interfaces with embedded interfaces

[AhmedNSidd]

What did you do? (required: The issue will be closed when not provided)

In my Golang project, I had a package named service. In this package, I had a file where I was defining two interfaces: InterfaceParent and InterfaceChild. Each were defining their own functions, but the catch was that :InterfaceParent was embedded inside the interface definition of InterfaceChild, so it looked as follows:

type InterfaceParent interface {
     bar()
}

type InterfaceChild interface {
   InterfaceParent
    foo()
}

After this was done, in a different package, I ran :GoImpl m *MockInterfaceChild github.com/organization123/project123/microservice123/service.InterfaceChild, but I ran into the following error:

vim-go: unrecognized interface: service.InterfaceParent

What did you expect to happen?

I expected the :GoImpl m *MockInterfaceChild github.com/organization123/project123/microservice123/service.InterfaceChild to implement placeholders / stubs for the foo() function in InterfaceChild.

What happened instead?

I got an error instead: vim-go: unrecognized interface: service.InterfaceParent

Configuration (MUST fill this out):

vim-go version: ac1fb9611de435d80a6badcf8482cb1428449b10

vimrc you used to reproduce:

vimrc

call plug#begin()

" PLUGINS

"" Plugin for working with Golang projects
Plug 'fatih/vim-go', { 'do': ':GoUpdateBinaries' }

call plug#end()

set autowrite

Vim version (first three lines from :version):

VIM - Vi IMproved 9.0 (2022 Jun 28, compiled Jun 29 2024 05:34:37)
macOS version - arm64
Included patches: 1-2136, 2142

Go version (go version):

go version go1.22.6 darwin/arm64

Go environment

go env Output:

GO111MODULE=''
GOARCH='arm64'
GOBIN=''
GOCACHE='/Users/ahsiddiqui/Library/Caches/go-build'
GOENV='/Users/ahsiddiqui/Library/Application Support/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='arm64'
GOHOSTOS='darwin'
GOINSECURE=''
GOMODCACHE='/Users/ahsiddiqui/go/pkg/mod'
GONOPROXY='github.com/equinix-gnae/*'
GONOSUMDB='github.com/equinix-gnae/*'
GOOS='darwin'
GOPATH='/Users/ahsiddiqui/go'
GOPRIVATE='github.com/equinix-gnae/*'
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/opt/homebrew/Cellar/[email protected]/1.22.6/libexec'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/opt/homebrew/Cellar/[email protected]/1.22.6/libexec/pkg/tool/darwin_arm64'
GOVCS=''
GOVERSION='go1.22.6'
GCCGO='gccgo'
AR='ar'
CC='cc'
CXX='c++'
CGO_ENABLED='1'
GOMOD='/dev/null'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -arch arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -ffile-prefix-map=/var/folders/0r/pbc91fld4_3_dsg2cpx90_140000gp/T/go-build2359003490=/tmp/go-build -gno-record-gcc-switches -fno-common'

gopls version

gopls version Output:

golang.org/x/tools/gopls v0.16.2

[AhmedNSidd]

I found out that this issue isn't directly related to vim-go so much as it is related to the impl tool that vim-go uses.

Apparently there's been an open-standing ticket for this issue since 2018 in the impl repo: josharian/impl#30

[AhmedNSidd]

I'll go ahead and close this issue since as mentioned before, this isn't directly related to vim-go, but I will mention that from doing some research online, it looks like there are alternatives to the :GoImpl command which is to use the :GoGenerate command in conjunction with the mockery tool to generate your mocks based off interfaces.