Type

str

变量赋值

输入：

$str1 := "Hello"
let str2 = 'World'
let str3: str? // 空字符串
let str4 = "123" as str

输出：

let str1 = "Hello"
let str2 = "World"
let str3 = "" // 空字符串
let str4 = "123"

长字符串

字符插值

输入：

$greeting := "Hello"
$name := "Alice"

$message := "$greeting, $name!"

输出：

let greeting = "Hello"
let name = "Alice"

let message = "{greeting}, {name}!"

字符串前缀

num

变量赋值

输入：

// 整数赋值
let num1 = 42
let num2: num = -17

type float = num

// 浮点数赋值
$float1 := 3.14
let float2 = -0.001
let float3: num = 0.0
$float4 := 0.5 as float
let float5: float = 5.0

// 科学计数法形式（作为字符串处理）
sci1=1e3
sci2=-2.5e-4

输出：

// 整数赋值
let num1 = 42
let num2 = -17

// 浮点数赋值
let float1 = 3.14
let float2 = -0.001
let float3 = 0.0
let float4 = 0.5
let float5 = 5.0

// 科学计数法形式（作为字符串处理）
let sci1 = "1e3"
let sci2 = "-2.5e-4"

浮点数参与表达式

作为数组元素

条件判断中使用浮点数

函数参数中的float值

bool

输入：

if true {
  echo "This always runs"
}

if false {
  echo "This never runs"
}

输出：

if true {
  echo "This always runs"
}

if false {
  echo "This never runs"
}

null

变量赋值

输入：

let nil1 = null
let nil2
let nil3: str?
let nil4: any

输出：

let nil1 = null
let nil2 = null
let nil3 = null
let nil4 = null

array

变量赋值

输入：

let nums = [1, 2, 3]
let fruits = ["apple", "banana", "orange"]

输出：

let nums = [1, 2, 3]
let fruits = ["apple", "banana", "orange"]

方法

triple

输入：

let nums = (1, 2)

输出：

let nums = [1, 2]

set

输入：

let nums = {1, 2}

输出：

let nums = [1, 2]

map

enum

枚举常量

输入：

enum Protocal {
    tcp, // 0
    udp = 2,
    icmp, // 3
}

enum Arch {
    x86 = "x86",
    arm = "arm",
    amd64 = "amd64"
}

enum Color {
    red = "#FF0000",
    white = 0xffffff,
}

输出：

const enum_protocal_tcp = 0
const enum_protocal_udp = 2
const enum_protocal_icmp = 3

const enum_arch_x86 = "x86"
const enum_arch_arm = "arm"
const enum_arch_amd64 = "amd64"

const enum_color_red = "#FF0000"
const enum_color_white = "0xffffff"

Tips

变量的命名以实际为准，上面的规则仅用于演示。

枚举变量

输入：

enum Protocal {
    final text: str
    final index: num

    const Protocal(this.text, this.index);

    tcp("tcp", 0),
    udp("udp", 2),
    icmp("icmp", 3);

    fn get_protocal_no() throws -> num {
        return match $this.text {
            "tcp" => 6,
            "udp" => 17,
            "icmp" => 1,
            _ => throw "unreachable"
        }
    }
}

echo Protocal::tcp.index
echo Protocal::udp.get_protocal_no()

输出：

const enum_protocal_tcp_text = "tcp"
const enum_protocal_tcp_index = 0
// ... 省略其他定义

fun enum_get_protocal_no(arg1: Text, arg2: Num) {
    if {
        arg1 == "tcp" {
            return 6
        }
        arg1 == "udp" {
            return 17
        }
        arg1 == "icmp" {
            return 1
        }
        else {
            hulo_throw("unreachable")
        }
    }
}

echo enum_protocal_tcp_index
echo enum_get_protocal_no(enum_protocal_tcp_text, enum_protocal_tcp_index)

class

cmd