Is it possible to make an interface constant if its concrete value type is bool/number/string?
On Saturday, August 6, 2016 at 3:48:17 AM UTC+8, Ian Lance Taylor wrote: > > On Fri, Aug 5, 2016 at 11:21 AM, T L <tapi...@gmail.com <javascript:>> > wrote: > > > > For an interface value, its internal values will never change. > > Are there any problems if golang supports constant interface values? > > Pedantically, in Go, constants are untyped by default. It doesn't > make sense to speak of an untyped interface value. I would describe > what you are asking for as an immutable variable. I've often thought > that immutable variables would be useful in Go, but since they have to > be initialized it's not that simple. For example, io.EOF is > initialized using a function call. That means that it can't actually > be in read-only memory, and of course it's possible to take it's > address. How do we prevent it from being changed, without introducing > an immutable qualifier into the type system? It's a complex problem > for which I have no solution. And the benefits of an immutable > variable aren't all that high. > > Ian > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
