DoScript

一个Rust编写的脚本语言

语法

包

 import std
 import api from http

常量

const PI = 3.14
const PI :f32 = 3.14

变量

let title  = 'hello'
let title :string = 'hello'

条件语句

if (a = 10) {
	 //to do something
    return true
}else {
	 //to do something
    return false
}

循环语句

for (let i = 0; i < 10; i++) {
    //to do
}

数组

let arr  = [1,2,3,4,5]
let arr :[]int = [1,2,3,4,5]
arr[0] = 10
arr.push()
arr.pop()
arr.contan() 

元组

let t = (1,"hello",1010)
let t :(int,string,int) = (1,"hello",1010)

字典

let mut map :HashMap<string, int> = HashMap::new();
map.insert("Alice", 100);
map.insert("Bob", 90);
map.insert("Charlie", 95);
let alice_map = map.get("Alice");

函数

func main(){
	//to do
    setTextProperties({title:"hello"})
    <p></p>
}

func setTextProperties(p:Properties) -> Properties{
    //to do
    return p
}

//匿名函数
const variable = func() -> Properties {
    return 
}
//箭头函数
const variable = () -> Properties => {
    return 
}

func createParagraphs() {
	<段落 属性=p>
		<文字 属性=p></文本>
	</段落>
	<p properties=p>
		<text properties=p></text>
	</p>
}

结构体

struct  Properties{
    title: string,  
    setTitle: func()-> string {
        //to do something
        return self.title = "hello"
    },
    getTitle: ()-> string => {
    //to do something
        return self.title
    }
}

继承

struct Preson :Properties {
}

//语法糖
struct Preson  {    
    super :Properties
}

let person = new Person({
    title : "hello"
})

person.super.title = "hello"

枚举

enum Result<S, E>{
    Ok(S),
    Err(E)
}

enum Option<T> {
    Some(T),
    None,
}

函数重载

func getName(p: Peolpe) -> string {

}

func getName(p: Student) -> string {

}

模式匹配

func value_in_cents(coin: Coin) -> int {
    match coin {
        Coin::Penny => 1,
        Coin::Nickel => 5,
        Coin::Dime => 10,
        Coin::Quarter => 25,
    }
}

装饰器

@name(value=2)
func name() -> string {

}

异常处理

try {
    // to do
    throw new Exception()
} catch (e: SomeException) {
    // 处理程序
} finally {
    // 可选的 finally 块
}