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Richard Musiol 2bd767b102 syscall/js: improve Value.String() for non-string values
This change modifies Value.String() to use the following
representations for non-string values:
  <undefined>
  <null>
  <boolean: true>
  <number: 42>
  <symbol>
  <object>
  <function>

It avoids JavaScript conversion semantics in the Go API and lowers the
risk of hidden bugs by unexpected conversions, e.g. the conversion
of the number 42 to the string "42". See discussion in #29642.

This is a breaking change, which are still allowed for syscall/js.
The impact should be small since it only affects uses of
Value.String() with non-string values, which should be uncommon.

Updates #29642.

Change-Id: I2c27be6e24befe8cb713031fbf66f7b6041e7148
Reviewed-on: https://go-review.googlesource.com/c/go/+/169757
Run-TryBot: Richard Musiol <neelance@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2019-03-28 09:36:43 +00:00
.github .github: don't render author-facing text in ISSUE_TEMPLATE 2018-11-02 04:47:34 +00:00
api text/scanner: don't liberally consume (invalid) floats or underbars 2019-02-20 20:23:28 +00:00
doc cmd/go: add GOWASM environment variable 2019-03-23 20:33:57 +00:00
lib/time time: read 64-bit data if available 2019-02-26 23:10:35 +00:00
misc misc/cgo: enable testso and testsovar on aix/ppc64 2019-03-27 17:21:28 +00:00
src syscall/js: improve Value.String() for non-string values 2019-03-28 09:36:43 +00:00
test test: fix fixedbugs/issue30908.go to work with no-opt builder 2019-03-27 17:53:36 +00:00
.gitattributes
.gitignore .gitignore: ignore src/cmd/dist/dist 2017-10-28 21:55:49 +00:00
AUTHORS A+C: change email address for Elias Naur 2019-01-23 15:05:26 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS CONTRIBUTORS: second round of updates for Go 1.12 2019-01-30 18:01:19 +00:00
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README.md README: linkify some paths 2018-06-06 18:07:01 +00:00
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