net.go ok function's c != nil check right ?

[apma...@gmail.com]

Read function at net.go is like this:

func (c *conn) Read(b []byte) (int, error) {

    if !c.ok() {

the ok checks that c is non nil:

func (c *conn) ok() bool { return c != nil && c.fd != nil }

how can c ever be nil ? if it would c.ok() call would crash.

[Gregor Best]

Methods are part of the type, not of the value. It is perfectly safe to call methods on a nil value.

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-- 
--
  Gregor Best
  be...@pferdewetten.de

[Dan Kortschak]

It's perfectly valid to call a method on a nil receiver, so long at the
nil receiver is not dereferenced.

https://play.golang.org/p/Z-zXlj0-eVy

[apma...@gmail.com]

ooh.. thanks.