46. Enumeration traits
The enum_trait module implements typeinfo traits for the enumerations.
All functions and symbols are in “enum_trait” module, use require to get access to it.
require daslib/enum_trait
46.1. Typeinfo macros
- enum_names
Implements typeinfo(enum_names EnumOrEnumType) which returns array of strings with enumValue names.
- enum_length
Implements typeinfo(enum_length EnumOrEnumType) which returns total number of elements in enumeration.
46.2. Handled enumerations
- string_to_enum
Enumeration annotation which implements string constructor for enumeration.
46.3. Uncategorized
- string(arg: auto const)
string returns auto
argument |
argument type |
|---|---|
arg |
auto const |
- converts enum value to string
usage: let s = string(EnumValue)
- to_enum(ent: auto(EnumT) const; name: string const)
to_enum returns EnumT
argument |
argument type |
|---|---|
ent |
auto(EnumT) const |
name |
string const |
- converts string to enum value, returns defaultValue if not found
usage: let e = to_enum(type<EnumType>,”EnumValueName”, EnumType.DefaultValue)
- to_enum(ent: auto(EnumT) const; name: string const; defaultValue: EnumT const)
to_enum returns EnumT
argument |
argument type |
|---|---|
ent |
auto(EnumT) const |
name |
string const |
defaultValue |
EnumT const |
- converts string to enum value, returns defaultValue if not found
usage: let e = to_enum(type<EnumType>,”EnumValueName”, EnumType.DefaultValue)
- enum_to_table(ent: auto(EnumT) const)
enum_to_table returns table<string;EnumT>
argument |
argument type |
|---|---|
ent |
auto(EnumT) const |
- converts enum type to array of tuples (name, value)
usage: let t = enum_to_table(type<EnumType>)