要求 golang 结构体初始化的时候必须赋值所有字段 - V2EX
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maotao456

要求 golang 结构体初始化的时候必须赋值所有字段

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  •   maotao456 Sep 2, 2023 2883 views
    This topic created in 1001 days ago, the information mentioned may be changed or developed.

    因为在实际开发过程中看到过太多次因为少给结构体某个字段赋值产生数据 bug 的问题了,有没有什么 vscode 的插件可以提示结构体的所有导出字段并未被全部初始化啊?

    12 replies    2023-09-06 09:49:28 +08:00
    makdon
        1
    makdon  
       Sep 2, 2023
    对外不暴露结构体,只暴露接口,强制通过 New 方法初始化,可以达到这种效果
    type foo struct {
    a typeX
    b typeX
    }
    type Foo Interface {
    Methods()
    }
    func NewFoo( ...opts) Foo {
    return foo{...}
    }
    iyear
        2
    iyear  
       Sep 2, 2023
    iyear
        3
    iyear  
       Sep 2, 2023
    @iyear #2 不好意思,瞄点有问题,是 https://golangci-lint.run/usage/linters/#exhaustruct
    Nazz
        4
    Nazz  
       Sep 2, 2023 via Android
    没必要
    zhanglintc
        5
    zhanglintc  
       Sep 2, 2023   1
    @iyear #3 我猜你说的是锚 mao2 点
    iyear
        6
    iyear  
       Sep 2, 2023
    @zhanglintc #5 语文没学好
    cmdOptionKana
        7
    cmdOptionKana  
       Sep 2, 2023
    单元测试?
    WUWENZE
        8
    WUWENZE  
       Sep 2, 2023
    yplam
        9
    yplam  
       Sep 2, 2023 via Android
    如果默认值不是空值,并且字段又较多,那可能定义多一个 DefaultXXX 这样合理点,或者用 NewXXX 传必填项,可选参数 WithXXX 定义非必填。ide 提示效果有限,除非这个结构体永远不会增加字段,lint 效果好点
    aprikyblue
        10
    aprikyblue  
       Sep 2, 2023
    我觉得提供 New 方法就够了,谁不用 New 方法创建对象的就是谁的问题。
    kkkbbb
        11
    kkkbbb  
       Sep 3, 2023
    比如出现什么 bug ?不是自动会有默认值么?
    maotao456
        12
    maotao456  
    OP
       Sep 6, 2023
    @iyear 多谢
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