Get Enum Name from Value?

Question

I just stumbled on this topic while looking for an answer to this question.

Essentially, what I'm asking is the opposite of what's done in that thread. Instead of getting an enum's value by it's name, I'd like to get it's name by it's value. How is this done?

Enums can be set equal to each other: enum {white, gray = 1, grey =1, black};. They can be built from named enums: enum {user = 4, group = 2; over = 1;}` These can be manipulated: enum all = user | group | other; How would you convert 7 to "all" here> — Eric Jablow

he_the_great he_the_great · Accepted Answer · 2013-11-24T19:06:47

You do it the exact same why, but as Eric points out, it isn't perfect:

import std.conv;
import std.stdio;

enum LogLevel { ALL, INFO, WARNING }
enum Color {white, gray = 1, grey =1, black}

void main()
{
     enum l = to!LogLevel(1);
     assert(l == LogLevel.INFO);
     writeln(to!string(l));

     enum c = to!Color(1);
     writeln(to!string(c));
}

INFO
gray

Get Enum Name from Value?

1 Answers