Rust sample code:

#[cfg(name = "users")]

PHP sample code:

/*
@Table(name = "users")
*/

Java sample code:

@Table(name = "users")

How to use dlang get key name?

On Monday, 26 March 2018 at 08:29:31 UTC, Brian wrote:
> Rust sample code:
>
> #[cfg(name = "users")]
>
> PHP sample code:
>
> /*
> @Table(name = "users")
> */
>
> Java sample code:
>
> @Table(name = "users")
>
> How to use dlang get key name?

If I understand your question correctly:

struct Table {
    string name;
}

struct Foo {
    @Table("foo")
    int n;
}

unittest {
    import std.traits;

    string name = getUDAs!(Foo.n, Table)[0].name;
}

--
  Simen

On Monday, 26 March 2018 at 08:50:31 UTC, Simen Kjærås wrote:
> On Monday, 26 March 2018 at 08:29:31 UTC, Brian wrote:
>> Rust sample code:
>>
>> #[cfg(name = "users")]
>>
>> PHP sample code:
>>
>> /*
>> @Table(name = "users")
>> */
>>
>> Java sample code:
>>
>> @Table(name = "users")
>>
>> How to use dlang get key name?
>
> If I understand your question correctly:
>
> struct Table {
>     string name;
> }
>
> struct Foo {
>     @Table("foo")
>     int n;
> }
>
> unittest {
>     import std.traits;
>
>     string name = getUDAs!(Foo.n, Table)[0].name;
> }
>
> --
>   Simen

Thanks.
but you don't understand my means, I want have keys with multiple indeterminate names.

Rust sample code:

#[cfg(name1 = "users", name2 = "users111")]

PHP sample code:

/*
@Table(name2 = "users", name2 = "users111")
*/

Java sample code:

@Table(name2 = "users111", name1 = "users")

How to use dlang get key name?

Don't have support get key function?

How to do?

On Tuesday, 27 March 2018 at 15:38:48 UTC, Brian wrote:
> but you don't understand my means, I want have keys with multiple indeterminate names.

You can pass an associative array (or better yet, a struct containing one) as a UDA and then use the regular loop over its keys and values.

struct Table { string[string] keys_and_values; }

@Table(["name1": "users", "name2" : "users111"])
void foo() {}


D's UDAs are just a value attached to the name, so all normal rules of types apply.