类定义

@<class-name> {
    property: Type
    method(param: Type) {
        # method body
        this.property = ... # 类方法中可使用 this 获取当前示例
    }
}

匿名类：

variable = ${
    property: Type
    new(param: Type) {
        # constructor
    }
    method(param: Type) {
        # method body
    }
}

类实例化：

instance = <class-name>(param) # calls constructor
instance = <class-name> { property: <value> }
instance = <class-name> {
    property1: <value1>
    property2: <value2>
    property3: <value3>
}

使用示例：

@Point {
    x: Number
    y: Number
    distanceFromOrigin() {
        return math.sqrt(x ^ 2 + y ^ 2)
    }
}

point1 = Point(1, 1)
point2 = Point{ x: 1, y: 1 }

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