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// +build go1.13
package errorx
import "errors"
func isOfType(err error, t *Type) bool {
e := burrowForTyped(err)
return e != nil && e.IsOfType(t)
}
func (e *Error) isOfType(t *Type) bool {
cause := e
for cause != nil {
if !cause.transparent {
return cause.errorType.IsOfType(t)
}
cause = burrowForTyped(cause.Cause())
}
return false
}
// burrowForTyped returns either the first *Error in unwrap chain or nil
func burrowForTyped(err error) *Error {
raw := err
for raw != nil {
typed := Cast(raw)
if typed != nil {
return typed
}
raw = errors.Unwrap(raw)
}
return nil
}
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