internal/lsp/cache: allow fixing multiple syntax errors

Allow fixSrc to run multiple times on a file. For example:

    func main() {
    	var s S
    	if s.<>
    }

    type S struct {
    	i int
    }

To properly complete at <>, we need to perform two fixes. We must
insert a phantom underscore after "s." to deal with the dangling
selector, and then we must insert phantom "{}" for the "if" statement
to deal with the incomplete "if" block. Previously we stopped at one
fix, but now we allow for up to 10. I added a limit because I am
afraid there are cases where we could get stuck trying to apply the
same fix again and again.

Also, drive-by set isIncomplete=true when we return early in
lsp/completion.go. I have found my editor incorrectly caches this zero
result in certain cases because it thinks results are "complete".

Fixes golang/go#43471.

Change-Id: Idd34cc164d579fa12a27920dc3afb372799abf26
Reviewed-on: https://go-review.googlesource.com/c/tools/+/289271
Run-TryBot: Muir Manders <muir@mnd.rs>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Hyang-Ah Hana Kim <hyangah@gmail.com>
Trust: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
3 files changed
tree: 95d35400cd6d19348f8409e1503c3c76e4e1c688
  1. benchmark/
  2. blog/
  3. cmd/
  4. container/
  5. copyright/
  6. cover/
  7. go/
  8. godoc/
  9. gopls/
  10. imports/
  11. internal/
  12. playground/
  13. present/
  14. refactor/
  15. txtar/
  16. .gitattributes
  17. .gitignore
  18. .prettierrc
  19. AUTHORS
  20. codereview.cfg
  21. CONTRIBUTING.md
  22. CONTRIBUTORS
  23. go.mod
  24. go.sum
  25. LICENSE
  26. PATENTS
  27. README.md
README.md

Go Tools

PkgGoDev

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.

JS/CSS Formatting

This repository uses prettier to format JS and CSS files.

The version of prettier used is 1.18.2.

It is encouraged that all JS and CSS code be run through this before submitting a change. However, it is not a strict requirement enforced by CI.

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.