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f# - 具有继承的类中的缩进规则？

问题描述

关于缩进规则，我对 F# 编译器（通过 Ionide）有点困惑。

这是我触发警告的代码片段：

type MyGame () as this =
  inherit Game ()
    let graphics = new GraphicsDeviceManager (this)
    let mutable spriteBatch = null
    let mutable state =
      {
        Board = Map.empty
        Selection = List.empty
      }

    do
      this.IsMouseVisible <- true

    // ...

但是，只有当我从前一行中缩进一个或多个字符时，F# 才显得很开心，这看起来……对我来说很奇怪：

type MyGame () as this =
  inherit Game ()
    let graphics = new GraphicsDeviceManager (this)
      let mutable spriteBatch = null
        let mutable state =
          {
            Board = Map.empty
            Selection = List.empty
          }

          do
            this.IsMouseVisible <- true

    // ...

这样的代码应该如何格式化？

标签： f#

解决方案

这是因为你的inherit Game ()行不像接下来的那样缩进。更改缩进，警告消失：

type MyGame () as this =
    inherit Game ()
    let graphics = new GraphicsDeviceManager (this)
    let mutable spriteBatch = null
    let mutable state =
      {
        Board = Map.empty
        Selection = List.empty
      }

    do
      this.IsMouseVisible <- true

    // ...

另请注意，有时您的缩进会优于编译器的建议。

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