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// Copyright 2019 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 xerrors_test
import (
"fmt"
"golang.org/x/xerrors"
)
type MyError2 struct {
Message string
frame xerrors.Frame
}
func (m *MyError2) Error() string {
return m.Message
}
func (m *MyError2) Format(f fmt.State, c rune) { // implements fmt.Formatter
xerrors.FormatError(m, f, c)
}
func (m *MyError2) FormatError(p xerrors.Printer) error { // implements xerrors.Formatter
p.Print(m.Message)
if p.Detail() {
m.frame.Format(p)
}
return nil
}
func ExampleFormatError() {
err := &MyError2{Message: "oops", frame: xerrors.Caller(1)}
fmt.Printf("%v\n", err)
fmt.Println()
fmt.Printf("%+v\n", err)
}
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