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package errors
type withContext interface {
Set(string, interface{})
Get(string) interface{}
Del(string)
Context() map[string]interface{}
}
// ErrorSetContext sets a value in the error's context. If the error has not
// been wrapped, it does nothing.
func SetContext(err error, key string, value interface{}) {
if e, ok := err.(withContext); ok {
e.Set(key, value)
}
}
// ErrorGetContext gets a value from the error's context. If the error has not
// been wrapped, it returns an empty string.
func GetContext(err error, key string) interface{} {
if e, ok := err.(withContext); ok {
return e.Get(key)
}
return ""
}
// ErrorDelContext removes a value from the error's context. If the error has
// not been wrapped, it does nothing.
func DelContext(err error, key string) {
if e, ok := err.(withContext); ok {
e.Del(key)
}
}
// ErrorContext returns the context map for an error if it is a wrappedError.
// If it is not a wrappedError it will return an empty map.
func Context(err error) map[string]interface{} {
if e, ok := err.(withContext); ok {
return e.Context()
}
return nil
}
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