在 英语 中使用 Enum 的示例及其翻译为 中文
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This is because when defining an enum….
Enum. find/3 has three parameters.
Here's how our Elvis example looks as an enum.
No two enum members can have the same name.
Item 77: For instance control, prefer enum types to readResolve.
An enum is a type that the developer can define.
How do I create a generic method to return an array of the enum values instead of its constants?
Enum The size of an machine word.
In the general case, enum and struct layouts are undefined.
Enum types User-defined types of the form enum E{…}.
In Rust they can be an enum(Rust's keyword for a"tagged union" or"sum type").
Enum Declares an enumeration and defines the values of its members.
Listing 15-2: The first attempt at defining an enum to represent a cons list data structure of i32 values.
The enum hack is worth knowing about for several reasons.
Home> Language Extensions> Standard C and standard C++ language extensions> Structure,union, enum, and bitfield extensions.
Similarly, enum values can have an underlying value like Tuesday= 72.
Enum declarations may appear in the same places that class declarations can occur.
For example, here is the denition of an enum type named Season whose values are the names of the four seasons of the year.
Enum declarations may appear in the same places that class declarations can occur.
Finally, in a struct or enum definition, all lifetimes must be explicitly declared.
Every enum type has an underlying type, which must be one of the eight integral types.
The constant value for each enum member must be in the range of the underlying type of the enum.
The enum is a flags enum and you have more than 32 flags, or expect to have more in the future.
That property of IP addresses makes the enum data structure appropriate for this case, because enum values can only be one of the variants.
Enum may implement many interfaces but cannot extend any class because it internally extends Enum class.
Other than this circularity restriction, enum member initializers may freely refer to other enum member initializers, regardless of their textual position.
The Enum specification has this to say about ordinal:“Most programmers will have no use for this method.
Technically, an enum is considered to be a special kind of class, but that is not important for now.
Enum members have the type of their containing enum type(except within other enum member initializers: see§14.2).
Converting a C-style enum to an integer can be done with an as expression, like e as i64(where e is some enum).