F＃与Haskell的where子句一样吗？

我想知道F＃中是否有像Haskell的where子句中的任何内容。这将允许以变换以下代码F＃与Haskell的where子句一样吗？

let roulleteWheel numberGenerator (scoredPopulation:ScoredPopulation) = 
    let targetScore = 
    let totalScore = totalPopulationFitness scoredPopulation 
    Seq.head (numberGenerator 0.0 totalScore) 

    let isMatch (score, accumulatedScore) = 
    if (accumulatedScore >= targetScore) then 
     Some(score) 
    else 
     None 

    let accumulatedScores = 
    let scores = Seq.map (fun (_, score) -> score) scoredPopulation 
    Seq.skip 1 (Seq.scan (+) 0.0 scores) 

    Seq.pick isMatch (Seq.zip scoredPopulation accumulatedScores)

入（IMO）稍微更可读的版本

let roulleteWheel numberGenerator (scoredPopulation:ScoredPopulation) = 
    Seq.pick isMatch (Seq.zip scoredPopulation accumulatedScores) 
    where 
    let targetScore = 
     let totalScore = totalPopulationFitness scoredPopulation 
     Seq.head (numberGenerator 0.0 totalScore) 

    let isMatch (score, accumulatedScore) = 
     if (accumulatedScore >= targetScore) then 
     Some(score) 
     else 
     None 

    let accumulatedScores = 
     let scores = Seq.map (fun (_, score) -> score) scoredPopulation 
     Seq.skip 1 (Seq.scan (+) 0.0 scores)

，因为它显示了功能的核心部分的第一和实现细节以后（挑剔，我认为！）。

我的猜测是F＃解析代码文件的方式是不可能的。我对吗？看看F＃的关键字引用似乎没有炫耀我想要的任何东西。如果它不存在，有没有其他方法可以更好地分解出所显示的代码？我会说这是好的，但你永远不会知道..

来源

2011-09-04 devoured elysium