C++17 allows scoped enums to be initialized with integers as long as it's not narrowing, e.g. #include <cstdint> enum class e16 : uint16_t { x16, y16 }; enum class e32 : uint32_t { x32, y32 }...

I know that, generally, we can forward-declare enums in C++11. So, why does this: enum kind_t { kind1, kind2 }; template <kind_t Kind> struct foo {}; template <> struct foo<kind1&g...

I have the unfortunate task in 2024 of adding some code to a codebase that needs to be used in a C++03 setting - where unfortunately the original class myclass can't be changed. I've gotten stuck o...

An associate has created a schema that uses an ENUM() column for the primary key on a lookup table. The table turns a product code "FB" into it's name "Foo Bar". This primary key is then used as a...

I would like to pass in the parameters what arm of the enum I need to match, something like this: enum D { A(i64), B(u64), C(u64, u64), } let a = D.A(10); println!(a.is_of(D.A)); // true prin...

This is my first time working with jest. I have a scenario where I want to see if the selected value is in an enum or not. Here is my test case: test('Should be valid', () => { expect(TestCase...

I have an enum FileType public static enum FileType { CSV, XML, XLS, TXT, FIXED_LENGTH } FileType fileType = FileType.CSV; Is there a better (cleaner) way to check fileType for multiple values...

I have basic enum enum Fruit { case APPLE; case ORANGE; case BANANA; } and some function that uses typing with that enum: function eatFruit (Fruit $fruit) { // do stuff } and variable with un...

Making an enum with exactly n many members is trivial if I've defined it myself: class Compass(enum.Enum): NORTH = enum.auto() EAST = enum.auto() SOUTH = enum.auto() WEST = enum.auto() ## or #...

I am programming in C for a microcontroller so I am not sure if this question belongs here or on the electronics stackexchange. Just let me know if it doesn't fit here and I will move the question ...

I would like to be able to arrange the ordering of Enum. Has somebody suggestions how this can be solved? The following Enum meta class is using: class EnumMeta(type): def __new__(typ, name, b...

Python now has an Enum type (new in 3.4 with PEP 435, and alse backported), and while namespaces are a good thing, sometimes Enums are used more like constants, and the enum members should live in ...

Lets's say I have an enumerator, is it possible to get the property that follows? So if I had today=Days.Sunday would I be able to do something like tomorrow=today.next()? example: class Days(Enu...

I have created the following Enum: from enum import Enum class Action(str, Enum): NEW_CUSTOMER = "new_customer" LOGIN = "login" BLOCK = "block" I have inherited f...

I declare a model with an enum type like: class Event < ActiveRecord::Base enum event_type: { "special_event" => 0, "pto" => 1, "hospitality" => 2, "classroom" => 3 } Then in...

I'm working on code bases with extensive type hints, checked by mypy. There's several instances where we have a mapping from an enum.Enum or other small finite set of statically known values (typin...

What arithmetic operations are supported on c# enums? Surprisingly, I was unable to find it via neither google, nor wikipedia and stackoverflow. Can I add two enum values without any cast? Add arb...

While investigating the memory use of an application that exchanges message through PyZMQ using tracemalloc, I noticed a weird behavior of pickling and unpickling enums: memory looks like it is lea...

I have a table that contains an enum field CREATE TABLE `user_status` ( `id` int(10) unsigned NOT NULL AUTO_INCREMENT, `values` enum('on', 'off'), PRIMARY KEY (`id`), ) ENGINE=InnoDB; how can...

Why i can't use reinterpret_cast operator for such a cast? enum Foo { bar, baz }; void foo(Foo) { } int main() { // foo(0); // error: invalid conversion from 'int' to 'Foo' // foo(reinterpret_...

In my code, I was puzzled by Enum instances with the same value not comparing equal. I quickly realized that their id(...) were different. Later, much less quickly, I realized that the only change ...

I have an enum Nationality: class Nationality: Poland='PL' Germany='DE' France='FR' How can I convert this some enum to int in this or similar way: position_of_enum = int(Nationality.Poland...

I would like to populate a java.swing JComboBox with values from an Enum. e.g. public enum Mood { HAPPY, SAD, AWESOME; } and have these three values populate a readonly JComboBox. Thanks!

Playing around with the record type in C#, it looks like it could be quite useful to build discriminated-union-like data structures, and I'm just wondering if I'm missing some gotchas that I'll reg...

Anonymous enums are in common use for defining compile-time-only constants in a compiler-supported fashion (i.e. without resorting to Macros), in C. This is also true for C++ (because even while th...