生成 F# 代码

发布于 2024-08-20 03:10:12 字数 903 浏览 14 评论 0原文

T4 是 C#/VB.NET 的“官方”代码生成引擎。但是F# 不支持它（这是从四月份开始的，但我不能'找不到任何新的提及）。那么生成 F# 代码的好方法是什么？

编辑：

我想实现 2-3 手指树 F#。我已经用 C# 实现了它们，所以这应该是一个很好的比较。树的“数字”和节点可以表示为数组，因此

type 't FingerTree = Empty | Single of 't | Deep of 't array * (('t FingerTree) array) lazy * 't array

但是，这些数组的最大大小非常小，因此最好避免

type 't Digit = Digit1 of 't | Digit2 of 't*'t | Digit3 of 't*'t*'t | Digit4 of 't*'t*'t*'t
type 't Node = Node2 of 't FingerTree * 't FingerTree | Node3 of 't FingerTree * 't FingerTree * 't FingerTree 
type 't FingerTree = Empty | Single of 't | Deep of 't Digit * ('t Node) lazy * 't Digit

边界检查等。

但是然后将所有函数写在 Digit 上手动创建 Node 变得更加困难，最好生成它们。类似 T4 的方法看起来非常适合它......

原文

T4 is the "official" code generation engine for C#/VB.NET. But F# doesn't support it (this is from April, but I couldn't find any newer mentions). So what is a good way to generate F# code?

EDIT:

I want to implement 2-3 finger trees in F#. I already have implemented them in C#, so this should be a nice comparison. The "digits" and nodes of the tree can be represented as arrays, so

type 't FingerTree = Empty | Single of 't | Deep of 't array * (('t FingerTree) array) lazy * 't array

However, the maximum size of these arrays is very small, so it'd be nice to have

type 't Digit = Digit1 of 't | Digit2 of 't*'t | Digit3 of 't*'t*'t | Digit4 of 't*'t*'t*'t
type 't Node = Node2 of 't FingerTree * 't FingerTree | Node3 of 't FingerTree * 't FingerTree * 't FingerTree 
type 't FingerTree = Empty | Single of 't | Deep of 't Digit * ('t Node) lazy * 't Digit

to avoid bounds checking, etc.

But then writing all functions on Digit and Node by hand becomes more difficult, and it's better to generate them. And a T4-like approach looks perfect for it...

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狼性发作 2024-08-27 03:10:12

由于 F# 不支持解决方案资源管理器中的自定义工具，因此您可以将 T4 文件放入 C# 或 Visual Basic 项目中，并将其输出重定向到 F# 项目。以下是使用 T4 Toolbox 执行此操作的方法：

<#@ template language="C#" hostspecific="True" debug="True" #>
<#@ output extension="txt" #>
<#@ include file="T4Toolbox.tt" #>
<#
    FSharpTemplate template = new FSharpTemplate();
    template.Output.Project = @"..\Library1\Library1.fsproj";
    template.Output.File = "Module2.fs";
    template.Render();
#>
<#+
class FSharpTemplate: Template
{
    public override string TransformText()
    {
#>
// Learn more about F# at http://fsharp.net

module Module2
<#+
        return this.GenerationEnvironment.ToString();
    }
}

#>

Because F# doesn't support custom tools in solution explorer, you can place your T4 files in a C# or Visual Basic project and redirect their output to your F# project. Here is how you can do it with T4 Toolbox:

<#@ template language="C#" hostspecific="True" debug="True" #>
<#@ output extension="txt" #>
<#@ include file="T4Toolbox.tt" #>
<#
    FSharpTemplate template = new FSharpTemplate();
    template.Output.Project = @"..\Library1\Library1.fsproj";
    template.Output.File = "Module2.fs";
    template.Render();
#>
<#+
class FSharpTemplate: Template
{
    public override string TransformText()
    {
#>
// Learn more about F# at http://fsharp.net

module Module2
<#+
        return this.GenerationEnvironment.ToString();
    }
}

#>

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