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errors: add joinError Unwrap example 

Change-Id: Id7489247e9bdd413f82fdf5a70197856c47abfb5
Reviewed-on: https://go-review.googlesource.com/c/go/+/674336
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Sean Liao <sean@liao.dev>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
Auto-Submit: Sean Liao <sean@liao.dev>
This commit is contained in:
jiahua wang 2025-05-20 13:40:18 +08:00 committed by Gopher Robot
parent 787362327f
commit ed70477909
1 changed files with 2 additions and 0 deletions
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2
src/errors/example_test.go
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@ -66,11 +66,13 @@ func ExampleJoin() {
if errors.Is(err, err2) { if errors.Is(err, err2) {
fmt.Println("err is err2") fmt.Println("err is err2")
} }
fmt.Println(err.(interface{ Unwrap() []error }).Unwrap())
// Output: // Output:
// err1 // err1
// err2 // err2
// err is err1 // err is err1
// err is err2 // err is err2
// [err1 err2]
} }
func ExampleIs() { func ExampleIs() {