On Mon, Sep 02, 2013 at 06:21:18AM +0200, Era Scarecrow wrote:
> k here's the condensed test file. Seems related to an 'alias
> this', in theory the HandleFlags bit/flag handling you should be
> able to say 'state.def' and it would be the same as
> 'FlagStates.def' without actually having to name it.
>
> [code]
>
> import std.traits;
>
> ///
> struct HandleFlags(E, I)
> if (is(E == enum) && isIntegral!(I) && isFloatingPoint!(I) ==
> false) {
> I state; ///Holds state.
> alias E Enum;
> alias Enum this; //seems to be root cause of the problem...
You can't alias a type to this. You need to instantiate it first, then
alias the instance to this (because 'this' is an object, not a type).
For example:
struct S {}
struct T {
//alias S this; // NG: S is a type
S s;
alias s this; // OK: s is an instance of S
}
T
--
Three out of two people have difficulties with fractions. -- Dirk Eddelbuettel
