Documentation On “All Known Implementation” of Interfaces

Question

Few months into learning Go, I just discover that os.File implements the io.Reader interface by implementing the Read(b []byte) (n int, err error) function. This allows me to us

Answer 1

https://github.com/dominikh/implements can do this:

implements is a command line tool that will tell you which types implement which interfaces, or which interfaces are implemented by which types.

e.g.

~ implements -types=crypto/cipher
crypto/cipher.StreamReader implements...
        io.Reader
*crypto/cipher.StreamReader implements...
        io.Reader
crypto/cipher.StreamWriter implements...
        io.Closer
        io.WriteCloser
        io.Writer
*crypto/cipher.StreamWriter implements...
        io.Closer
        io.WriteCloser
        io.Writer