Re: [Vala] Array as generic type not allowed? Can't ArrayList

Fri, 31 Aug 2012 04:14:48 -0700 

于 08/31/2012 06:52 PM, Luca Bruno 写道:

On Fri, Aug 31, 2012 at 12:48 PM, Just Fill Bugs <[email protected]>wrote:


I tried to create a list of string[] but it's not allowed on vala version
0.16.1.

using Gee;
void main() {
     var strings_list = new ArrayList<string[]>();
}

gives:
error: `string[]' is not a supported generic type argument, use `?' to box
value types

And adding "?" still give the same error.

Should generic support array as a type? Is it a bug?



It's not a bug, it's intentionally not supported as said by the compiler.
You can either create a class to encapsulate your array, or use other data
structures such as GLib.GenericArray or Gee.ArrayList and so on.
But array was represented as pointer, hence fit into a pointer. Isn't the requirement for generic type is fitting into a pointer size? 



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