• Anton Pastukhov (20/20) Dec 23 I'm stuck on a simple problem.
• bauss (9/29) Dec 23 Simply cast el to a string instead of using std.conv.to, that way
• Anton Pastukhov (3/4) Dec 23 Thanks much, it worked! Though I'm confused why. Could you please
• Jim Balter (17/21) Dec 23 I had the exact same issue yesterday. Allow me to quote ChatGPT:

Anton Pastukhov <mail anton9.com> writes:

I'm stuck on a simple problem.
There is this string enum of MIME types:

```d
enum BodyType: string {
     PlainText = "text/plain",
     JSON = "apllication/json",
     FormUrlencoded = "application/x-www-form-urlencoded",
     Multipart = "multipart/form-data",
     Other = "Other",
     None = "None"
}
```

Q: how can I iterate its values? With keys it's relatively easy:

```d
auto keys = [EnumMembers!BodyType]
     .map!(el => to!string(el))
     .array;

```
With values, though, I'm kinda stuck. Reading Ali's book and 
https://dlang.org/spec/enum.html did not bring enlightening

bauss <jacobbauss gmail.com> writes:

On Monday, 23 December 2024 at 20:20:02 UTC, Anton Pastukhov 
wrote:
 I'm stuck on a simple problem.
 There is this string enum of MIME types:

 ```d
 enum BodyType: string {
     PlainText = "text/plain",
     JSON = "apllication/json",
     FormUrlencoded = "application/x-www-form-urlencoded",
     Multipart = "multipart/form-data",
     Other = "Other",
     None = "None"
 }
 ```

 Q: how can I iterate its values? With keys it's relatively easy:

 ```d
 auto keys = [EnumMembers!BodyType]
     .map!(el => to!string(el))
     .array;

 ```
 With values, though, I'm kinda stuck. Reading Ali's book and 
 https://dlang.org/spec/enum.html did not bring enlightening

Simply cast el to a string instead of using std.conv.to, that way 
you retrieve the values.

```
auto values = [EnumMembers!BodyType]
     .map!(el => cast(string)el)
     .array;
```

Anton Pastukhov <mail anton9.com> writes:

On Monday, 23 December 2024 at 20:26:47 UTC, bauss wrote:

 Simply cast el to a string instead of using std.conv.to

Thanks much, it worked! Though I'm confused why. Could you please 
elaborate?

Jim Balter <jqbalter gmail.com> writes:

On Monday, 23 December 2024 at 20:32:58 UTC, Anton Pastukhov 
wrote:
 On Monday, 23 December 2024 at 20:26:47 UTC, bauss wrote:

 Simply cast el to a string instead of using std.conv.to

 Thanks much, it worked! Though I'm confused why. Could you 
 please elaborate?

I had the exact same issue yesterday. Allow me to quote ChatGPT:


You're correct that .to!string also produces the member name 
rather than the value of the enum, which can be confusing. This 
behavior occurs because .to!string calls the toString function 
defined for the enum type, which defaults to returning the name 
of the enum member rather than its associated value.

Why .to!string behaves this way:
Enums in D are designed to emphasize their symbolic names over 
their values. The toString implementation for enums is tailored 
to reflect this by default, focusing on member names instead of 
their underlying values. The std.conv.to function, when applied 
to an enum, invokes this toString behavior.

Correct way to get the value:
If you want to convert the underlying value of the enum member to 
a string, you must explicitly cast the enum to its base type.