[go-nuts] const in struct

[Newbie]

Hi all,

is it possible to declare a "const" in struct? Something simmilar to

type my_struct struct {
value string const // <-- doesn't work
}

Thanks


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[befelemepeseveze]

On 18 dub, 14:50, Newbie <postmasch...@gmail.com> wrote:

> is it possible to declare a "const" in struct? Something simmilar to
>
> type my_struct struct {
>     value    string const        // <-- doesn't work
>
> }

No.

http://golang.org/doc/go_spec.html#Struct_types

[peterGo]

Newbie,

There are boolean constants, integer constants, floating-point
constants, complex constants, and string constants.
http://golang.org/doc/go_spec.html#Constants

However you can't add const to the type system, and that is not likely
to change.
http://groups.google.com/group/golang-nuts/msg/7d7ec2854db125f2

Peter

[chris dollin]

On 18 April 2010 13:50, Newbie <postma...@gmail.com> wrote:

Hi all,

is it possible to declare a "const" in struct? Something simmilar to

type my_struct struct {
   value    string const        // <-- doesn't work
}

If you don't export the name, then outside the declaring
package you can't see it, let alone change it.

Disadvantage: you also then can't assign the struct
at all without going through some method/function.

Would that do?

--
Chris "allusive" Dollin

[travelnor...@gmail.com]

In addition to the above, the work around is quite simple if can use a method instead of a field:

type my_struct struct {}

func (m *my_struct) ConstantString() string {

    return "always return this"