F＃與Haskell的where子句一樣嗎？

我想知道F＃中是否有像Haskell的where子句中的任何內容。這將允許以變換以下代碼F＃與Haskell的where子句一樣嗎？

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）稍微更可讀的版本

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)

，因爲它顯示了功能的核心部分的第一和實現細節以後（挑剔，我認爲！）。

我的猜測是F＃解析代碼文件的方式是不可能的。我對嗎？看看F＃的關鍵字引用似乎沒有炫耀我想要的任何東西。如果它不存在，有沒有其他方法可以更好地分解出所顯示的代碼？我會說這是好的，但你永遠不會知道..

來源

2011-09-04 devoured elysium