RUST Programming, For Beginners, Quick Start Guide. by Ray Yao

Author:Ray Yao [Yao, Ray]
Language: eng
Format: azw3
Publisher: Step by Step Tutorial eBook & Book
Published: 2020-08-06T00:00:00+00:00

Enum

Enumeration is a custom data type that contains certain values. Use the enum keyword to define.

(1) Define an enum

enum Enum_Name{

member 1,

member 2,

……

}

(2) Access to member

Enum_Name:: member

Example 5.3

enum Language { // define an enum

JS, // member

GO,

VB,

}

fn program(var: Language){

match var{ // using match statement

Language:: JS=> println! ("JS in 8 Hours"),

Language:: GO=> println! ("GO in 8 Hours"),

Language:: VB=> println! ("VB in 8 Hours"),

}

}

fn main(){

program(Language::JS ); // access the member

program(Language:: GO);

program(Language:: VB);

}

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