ExprShape.ShapeVar|ShapeLambda|ShapeCombination Active Pattern (F#)

An active pattern that performs a complete decomposition viewing the expression tree as a binding structure.

Namespace/Module Path: Microsoft.FSharp.Quotations.ExprShape

Assembly: FSharp.Core (in FSharp.Core.dll)

// Signature:
( |ShapeVar|ShapeLambda|ShapeCombination| ) : (input:Expr) -> Choice<Var,(Var * Expr),(obj * Expr list)>


  • input
    Type: Expr

    The input expression.

Return Value

The decomposed Var, Lambda, or ConstApp.


This function is named ShapePattern in compiled assemblies. If you are accessing the function from a language other than F#, or through reflection, use this name.


Windows 7, Windows Vista SP2, Windows XP SP3, Windows XP x64 SP2, Windows Server 2008 R2, Windows Server 2008 SP2, Windows Server 2003 SP2

Version Information

F# Runtime

Supported in: 2.0, 4.0


Supported in: 3

See Also


Quotations.ExprShape Module (F#)

Microsoft.FSharp.Quotations Namespace (F#)