cmd/vet: incorrect "redundant invocation" report #6148
Description
% cat abc.go
package main
import (
"fmt"
)
type Person struct {
name string
}
func (p *Person) String() string {
return p.name
}
func main() {
p := Person{name: "Gopher"}
fmt.Printf("%s\n", p.String())
}
% go vet abc.go
abc.go:17: redundant invocation of String method of p
It's not redundant, because String method requires a pointer receiver. So, *Person
implements the Stringer interface, but Person does not.
Following vet advice produces the wrong result: http://play.golang.org/p/CnXisy9MC_.