go/internal/gcimporter: add support for exporting the 1.18 export format

This CL adds support for the Go 1.18 export format to iexport.go. This
support is based on cmd/compile/internal/typecheck/iexport.go, though
with a different types API and adjusted to build at Go versions below

Specifically, this CL adds support for both column details in positions,
and generic types and functions. Along the way, some minor adjustments
are made to aid in debugging and testing.

Notably, after this CL the export data version produced by
go/gcexportdata will depend on the Go version used to build.

As part of this change, TestIExportData_stdlib is unskipped for Go 1.18.

Fixes golang/go#48392

Change-Id: I1b218e0acd4864de5c7b89706192273bc7850ffa
Reviewed-on: https://go-review.googlesource.com/c/tools/+/351029
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
10 files changed
tree: 85183383c82e5747497a1de798383811736caef8
  1. .gitattributes
  2. .gitignore
  3. .prettierrc
  9. README.md
  10. benchmark/
  11. blog/
  12. cmd/
  13. codereview.cfg
  14. container/
  15. copyright/
  16. cover/
  17. go.mod
  18. go.sum
  19. go/
  20. godoc/
  21. gopls/
  22. imports/
  23. internal/
  24. playground/
  25. present/
  26. refactor/
  27. txtar/

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.


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.