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package main
import "errors"
func shouldDeclareErrInSignature() error { // want "return signature should be '\\(err error\\)'"
var err error // Should use variable declared in signature
err = nil
if err != nil {
return err
}
defer func() {
err = errors.New("defer error")
}()
return nil // want "does not return 'err'"
}
func doesDeclareErrInSignature() (err error) {
err = nil
if err != nil {
return err
}
defer func() {
err = errors.New("defer error")
}()
return nil // want "does not return 'err'"
}
func returnedErrorMustMatchDeferErrorName() (err error) {
err = nil
if err != nil {
return err
}
defer func() {
err = errors.New("defer error")
}()
err2 := errors.New("returned error")
return err2 // want "does not return 'err'"
}
func deferUsesUnconventionalErrName() error { // want "return signature should be '\\(anErr error\\)'"
var anErr error
anErr = nil
if anErr != nil {
return anErr
}
defer func() {
anErr = errors.New("defer error")
}()
return anErr
}
// TODO: This is starting to look like needless complexity. Maybe we just
// report that the error variable must be declared in the signature instead.
func multipleReturnValuesString() (string, error) { // want "return signature should be '\\(string1 string, err error\\)'"
var err error = nil
if err != nil {
return "", err
}
defer func() {
err = errors.New("defer error")
}()
return "ret", err
}
type AStruct struct {}
func multipleReturnValuesStruct() (*AStruct, error) { // want "return signature should be '\\(aStruct1 *AStruct, err error\\)'"
var err error = nil
if err != nil {
return nil, err
}
defer func() {
err = errors.New("defer error")
}()
return &AStruct{}, err
}
func good() (err error) {
err = nil
if err != nil {
return err
}
defer func() {
err = errors.New("defer error")
}()
return err
}
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