flag: method Get in interface Value

[gopherbot]

by raul.san@sent.com:

Add method Get to interface Value (http://golang.org/pkg/flag/#Value) to return its
value.

i.e. for boolValue:

func (b *boolValue) Get() interface{} { return bool(*b) }

This method is essential at working with sub-commands.

[rsc]

Comment 1:

We cannot change the Value interface for Go 1.2, but we could add a separate flag.Getter
interface and make the standard implementations implement it.
For Go 2 we could think about merging Getter into Value.

Labels changed: added go1.2, removed priority-triage.

Status changed to Accepted.

[robpike]

Comment 2:

This issue was closed by revision 49b3301.

Status changed to Fixed.