• Brian (9/9) Mar 26 2018 Rust sample code:
• Simen =?UTF-8?B?S2rDpnLDpXM=?= (15/24) Mar 26 2018 If I understand your question correctly:
• Brian (15/45) Mar 27 2018 Thanks.
• Adam D. Ruppe (9/11) Mar 27 2018 You can pass an associative array (or better yet, a struct

Brian <zoujiaqing gmail.com> writes:

Rust sample code:



PHP sample code:

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

Java sample code:

 Table(name = "users")

How to use dlang get key name?

Simen =?UTF-8?B?S2rDpnLDpXM=?= <simen.kjaras gmail.com> writes:

On Monday, 26 March 2018 at 08:29:31 UTC, Brian wrote:
 Rust sample code:



 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

Brian <zoujiaqing gmail.com> writes:

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:



 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:



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?

Adam D. Ruppe <destructionator gmail.com> writes:

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.