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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package errors_test
import (
"fmt"
"os"
"time"
"golang.org/x/exp/errors"
)
// MyError is an error implementation that includes a time and message.
type MyError struct {
When time.Time
What string
}
func (e MyError) Error() string {
return fmt.Sprintf("%v: %v", e.When, e.What)
}
func oops() error {
return MyError{
time.Date(1989, 3, 15, 22, 30, 0, 0, time.UTC),
"the file system has gone away",
}
}
func Example() {
if err := oops(); err != nil {
fmt.Println(err)
}
// Output: 1989-03-15 22:30:00 +0000 UTC: the file system has gone away
}
func ExampleAs() {
_, err := os.Open("non-existing")
if err != nil {
var pathError *os.PathError
if errors.As(err, &pathError) {
fmt.Println("Failed at path:", pathError.Path)
}
}
// Output:
// Failed at path: non-existing
}
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