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V8024. Redundant type assertion. The type of a variable already embeds the type that is checked using type assertion.
The analyzer has detected a redundant type check.
The example:
func foo(rwc io.ReadWriteCloser) io.Reader {
....
return rwc.(io.Reader)
}Checking the rwc.io.Reader type makes no sense, since the io.ReadWriteCloser type of the rwc parameter, embeds the io.Reader interface.
The fixed code:
func foo(rwc io.ReadWriteCloser) io.Reader {
....
return rwc
}Checking whether an expression has the empty interface type (interface{} or any) also makes no sense, since every type embeds such an interface. The example:
func foo(rwc io.ReadWriteCloser) interface {} {
....
return rwc.(interface{})
}The fixed code:
func f(rwc io.ReadWriteCloser) interface {} {
....
return rwc
}Was this page helpful?
