event: a new mechanism for caller detection

This avoids the need to know the stack depth to the caller by instead scanning the
stack skipping over entries that have been registered as helpers.
It also allows registration of helper packages, where every function from that package
is considered a helper function. This is used to elimitate all functions from the 
event package.

Change-Id: Id747e1a4a5ccbfa84dfd372cc33471490aa426ef
Reviewed-on: https://go-review.googlesource.com/c/exp/+/328790
Trust: Ian Cottrell <iancottrell@google.com>
Run-TryBot: Ian Cottrell <iancottrell@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
4 files changed
tree: b6ce71d9e090b7373b1eb2d83f0f4d9c6a8d5894
  1. .gitattributes
  2. .gitignore
  8. README.md
  9. apidiff/
  10. cmd/
  11. codereview.cfg
  12. ebnf/
  13. ebnflint/
  14. errors/
  15. event/
  16. fsnotify/
  17. go.mod
  18. go.sum
  19. inotify/
  20. internal/
  21. io/
  22. jsonrpc2/
  23. mmap/
  24. rand/
  25. shiny/
  26. shootout/
  27. sumdb/
  28. utf8string/
  29. winfsnotify/



This subrepository holds experimental and deprecated (in the old directory) packages.

The idea for this subrepository originated as the pkg/exp directory of the main repository, but its presence there made it unavailable to users of the binary downloads of the Go installation. The subrepository has therefore been created to make it possible to go get these packages.

Warning: Packages here are experimental and unreliable. Some may one day be promoted to the main repository or other subrepository, or they may be modified arbitrarily or even disappear altogether.

In short, code in this subrepository is not subject to the Go 1 compatibility promise. (No subrepo is, but the promise is even more likely to be violated by go.exp than the others.)

Caveat emptor.