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Commitf1e781c

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forkiKevinRansom
authored andcommitted
shortcut singleton list in append (dotnet#4445)
1 parentb7c2099 commitf1e781c

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‎src/fsharp/FSharp.Core/prim-types.fs‎

Lines changed: 8 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -3646,11 +3646,14 @@ namespace Microsoft.FSharp.Core
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|(h::t)->
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matchlist2with
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|[]->list1
3649-
|_->
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letres=[h]
3651-
letlastCons=PrivateListHelpers.appendToFreshConsTailrest
3652-
PrivateListHelpers.setFreshConsTaillastConslist2
3653-
res
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|_->
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matchtwith
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|[]->h::list2
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|_->
3653+
letres=[h]
3654+
letlastCons=PrivateListHelpers.appendToFreshConsTailrest
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PrivateListHelpers.setFreshConsTaillastConslist2
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res
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[<CompiledName("Increment")>]
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letincrcell=cell.contents<- cell.contents+ 1

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