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context: simplify stringify with a type switch 

Minor style change.

Change-Id: Ib30243a71a83de1a67d3d005bfdd1e04265fca1e
GitHub-Last-Rev: 9d654de10e
GitHub-Pull-Request: golang/go#31479
Reviewed-on: https://go-review.googlesource.com/c/go/+/172199
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Sameer Ajmani <sameer@golang.org>
This commit is contained in:
喜欢兰花山丘 2019-04-16 15:08:32 +00:00 committed by Brad Fitzpatrick
parent 4ee85e67e1
commit c4953a62f9
1 changed files with 3 additions and 3 deletions
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6
src/context/context.go
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@ -497,10 +497,10 @@ type valueCtx struct {
// want context depending on the unicode tables. This is only used by
// *valueCtx.String().
func stringify(v interface{}) string {
if s, ok := v.(stringer); ok {
switch s := v.(type) {
case stringer:
return s.String()
}
if s, ok := v.(string); ok {
case string:
return s
}
return "<not Stringer>"