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+ Operators for map2 and map3 #624

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+ Operators for map2 and map3 #624

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28 changes: 28 additions & 0 deletions src/FSharpPlus/Operators.fs
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Expand Up @@ -256,6 +256,34 @@ module Operators =
/// <category index="2">Applicative</category>
let inline map3 (f: 'T->'U->'V->'W) (x: '``ZipApplicative<'T>``) (y: '``ZipApplicative<'U>``) (z: '``ZipApplicative<'V>``) : '``ZipApplicative<'W>`` = Map3.Invoke f x y z

/// <summary>
/// Applies 2 lifted arguments to a non-lifted function with pointwise and/or parallel semantics.
/// Operator version of 'map2'.
/// </summary>
/// <category index="2">Applicative</category>
let inline (<<||) (f: 'T->'U->'V) (x: '``ZipApplicative<'T>``, y: '``ZipApplicative<'U>``) : '``ZipApplicative<'V>`` = Map2.Invoke f x y

/// <summary>
/// Applies 2 lifted arguments to a non-lifted function with pointwise and/or parallel semantics.
/// Operator version of 'map2' but with arguments flipped.
/// </summary>
/// <category index="2">Applicative</category>
let inline (||>>) (x: '``ZipApplicative<'T>``, y: '``ZipApplicative<'U>``) (f: 'T->'U->'V) : '``ZipApplicative<'V>`` = Map2.Invoke f x y

/// <summary>
/// Applies 3 lifted arguments to a non-lifted function with pointwise and/or parallel semantics.
/// Operator version of 'map3'.
/// </summary>
/// <category index="2">Applicative</category>
let inline (<<|||) (f: 'T->'U->'V->'W) (x: '``ZipApplicative<'T>``, y: '``ZipApplicative<'U>``, z: '``ZipApplicative<'V>``) : '``ZipApplicative<'W>`` = Map3.Invoke f x y z

/// <summary>
/// Applies 3 lifted arguments to a non-lifted function with pointwise and/or parallel semantics.
/// Operator version of 'map3' but with arguments flipped.
/// </summary>
/// <category index="2">Applicative</category>
let inline (|||>>) (x: '``ZipApplicative<'T>``, y: '``ZipApplicative<'U>``, z: '``ZipApplicative<'V>``) (f: 'T->'U->'V->'W) : '``ZipApplicative<'W>`` = Map3.Invoke f x y z



// Monad -----------------------------------------------------------
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