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I've got an enumeration type defined like so:
type tags =
| ART = 0
| N = 1
| V = 2
| P = 3
| NULL = 4
is there a way to do a for ... in tags do ?
This is the error that I'm getting:
The value, constructor, namespace or type
tagsis not defined
955
You can even assign different values to each member. The enum can be of any numeric data type such as byte, sbyte, short, ushort, int, uint, long, or ulong. However, an enum cannot be a string type. Specify the type after enum name as : type .
Enums don't have methods for iteration, like forEach() or iterator(). Instead, we can use the array of the Enum values returned by the values() method.
An enumerated type is a type whose legal values consist of a fixed set of constants. Common examples include compass directions, which take the values North, South, East and West and days of the week, which take the values Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, and Saturday.
The keyword “enum” is used to declare an enumeration. Here is the syntax of enum in C language, enum enum_name{const1, const2, ....... }; The enum keyword is also used to define the variables of enum type.
How about:
let enumToList<'a> = (Enum.GetValues(typeof<'a>) :?> ('a [])) |> Array.toList
This has the advantage of providing a strongly typed list
To use just do:
let tagList = enumToList<tags>
Use Enum.GetValues:
let allTags = Enum.GetValues(typeof<tags>)
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