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Muir Manders 7e40e1726e internal/lsp: improve signatureHelp in various cases
- show signature for function calls whose function expression is not
  an object (e.g. the second call in foo()()). since the function name
  is not available, we use the generic "func"
- only provide signature help when the position is on or within the
  call expression parens. this is consistent with the one other lsp
  server i tried (java). this improves the gopls experience in emacs
  where lsp-mode is constantly calling "hover" and
  "signatureHelp" ("hover" should be preferred unless you are inside
  the function params list)
- use the entire signature type string as the label since that includes
  the return values, which are useful to see
- don't qualify the function name with its package. it looks funny to
  see "bytes.Cap()" as the help when you are in a call
  to (*bytes.Buffer).Cap(). it could be useful to include invocant
  type info, but leave it out for now since signature help is meant to
  focus on the function parameters.
- don't turn variadic args "foo ...int" into "foo []int" for the
  parameter information (i.e. maintain it as "foo ...int")
- when determining active parameter, count the space before a
  parameter name as being part of that parameter (e.g. the space
  before "b" in "func(a int, b int)")
- handle variadic params when determining the active param (i.e.
  highlight "foo(a int, *b ...string*)" on signature help for final
  param in `foo(123, "a", "b", "c")`
- don't generate an extra space in formatParams() for unnamed
  arguments

I also tweaked the signatureHelp server log message to include the
error message itself, and populated the server's logger in lsp_test.go
to aid in development.

Fixes golang/go#31448

Change-Id: Iefe0e1e3c531d17197c0fa997b949174475a276c
GitHub-Last-Rev: 5c0b8ebd87a8c05d5d8f519ea096f94e89c77e2c
GitHub-Pull-Request: golang/tools#82
Reviewed-on: https://go-review.googlesource.com/c/tools/+/172439
Run-TryBot: Ian Cottrell <iancottrell@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2019-04-17 18:10:49 +00:00
benchmark/parse benchmark/parse: fix cosmetic defect in error str. 2015-02-02 17:07:43 +00:00
blog godoc,blog: perform minor cleanup 2018-04-14 19:30:04 +00:00
cmd cmd/compilebench: update document 2019-04-11 18:01:16 +00:00
container/intsets x/tools/container/intsets: add LowerBound 2017-08-21 16:11:21 +00:00
cover cover: handle multiple samples from the same location 2017-12-10 23:11:56 +00:00
go go/packages: add support for entire packages defined in overlays 2019-04-17 17:55:51 +00:00
godoc godoc/env: replace with golangorgenv 2019-03-07 16:39:06 +00:00
imports imports: fix circular imports 2019-04-07 03:08:57 +00:00
internal internal/lsp: improve signatureHelp in various cases 2019-04-17 18:10:49 +00:00
playground playground: use stdlib instead of appengine packages 2019-03-07 16:39:23 +00:00
present present: remove mention of non-existing emphasis toggle 2018-10-22 17:16:10 +00:00
refactor cmd/godoc,cmd/gorename,refactor/rename: skip tests on GOOS=android 2019-03-06 15:27:20 +00:00
.gitattributes tools: copying .gitattributes to all subrepositories (fixes windows build) 2014-12-23 06:32:51 +00:00
.gitignore .gitignore: roll back ".gitignore: ignore emacs backup files" 2018-02-13 00:43:28 +00:00
AUTHORS go.empty: prototype for new subrepository 2012-01-25 14:45:13 -05:00
CONTRIBUTING.md CONTRIBUTING.md: remove note about not accepting Pull Requests 2018-03-14 18:02:17 +00:00
CONTRIBUTORS go.empty: prototype for new subrepository 2012-01-25 14:45:13 -05:00
LICENSE LICENSE: add 2012-03-17 15:20:58 +11:00
PATENTS go.empty: add PATENTS file to the subrepo. 2012-04-16 11:24:04 +10:00
README.md README: switch to Markdown and add links 2017-09-27 05:40:07 +00:00
codereview.cfg tools: add codereview.cfg 2015-03-18 17:04:00 +00:00
go.mod all: update golang.org/x/net dependency in go.mod 2019-03-11 21:29:46 +00:00
go.sum all: update golang.org/x/net dependency in go.mod 2019-03-11 21:29:46 +00:00

README.md

Go Tools

This subrepository holds the source for various packages and tools that support the Go programming language.

Some of the tools, godoc and vet for example, are included in binary Go distributions.

Others, including the Go guru and the test coverage tool, can be fetched with go get.

Packages include a type-checker for Go and an implementation of the Static Single Assignment form (SSA) representation for Go programs.

Download/Install

The easiest way to install is to run go get -u golang.org/x/tools/.... You can also manually git clone the repository to $GOPATH/src/golang.org/x/tools.

Report Issues / Send Patches

This repository uses Gerrit for code changes. To learn how to submit changes to this repository, see https://golang.org/doc/contribute.html.

The main issue tracker for the tools repository is located at https://github.com/golang/go/issues. Prefix your issue with "x/tools/(your subdir):" in the subject line, so it is easy to find.