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The analyzer has detected a type assertion that can never succeed because both interfaces contain a method with the same name but different signatures.
The example:
type Validator interface {
Validate() error
}
type ContextValidator interface {
Validate(map[string]string) error
}
func check(v Validator) {
....
if cv, ok = v.(ContextValidator); ok {
....
}
....
}In the example, the v.(ContextValidator) assertion cannot be true because the Validate method has different signatures in the Validator and ContextValidator interfaces.
Such a type assertion would only make sense if the signatures of the Validate method are identical:
type Validator interface {
Validate() error
}
type ContextValidator interface {
Validate() error
}Was this page helpful?