Re: getting Key:Value pairs of an enum at compile time ?

[Stanislav Blinov]

On Thursday, 23 January 2014 at 17:59:05 UTC, Uplink_Coder wrote:
First and foremost, I'd suggest you use the beautiful solution 
proposed by Meta.

But to illustrate problems with your code:

  foreach (i,Item;[__traits(allMembers,Enum)]) {

This is the culprit. More specifically, you don't need to put the 
result of __traits into array. __traits(allMembers) returns a 
tuple which can be iterated at compile time. This is how it would 
look:

auto EnumToSelect(Enum)(string Name = __traits(identifier,Enum)) 
if (is(Enum==enum)) {
        string form_string;
        // Note, there are no [] enclosing __traits
        foreach (i,Item;__traits(allMembers,Enum)) {
                form_string ~=
                        "\toption(value='"~Item~"') "
                        ~__traits(getMember,Enum,Item)~"\n";
        }
        return form_string;
}