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Mark backing fields as CompilerGenerated (fixes serialization of fiel…
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…ds in FSI multiemit) (#13494)
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@dsyme
dsyme authored Jul 12, 2022
1 parent f89e651 commit 205b9a8
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Showing 21 changed files with 456 additions and 11 deletions.
10 changes: 9 additions & 1 deletion VisualFSharp.sln
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Original file line number Diff line number Diff line change
Expand Up @@ -84,6 +84,14 @@ EndProject
Project("{6EC3EE1D-3C4E-46DD-8F32-0CC8E7565705}") = "FSharp.Test.Utilities", "tests\FSharp.Test.Utilities\FSharp.Test.Utilities.fsproj", "{60D275B0-B14A-41CB-A1B2-E815A7448FCB}"
EndProject
Project("{6EC3EE1D-3C4E-46DD-8F32-0CC8E7565705}") = "FSharpSuite.Tests", "tests\fsharp\FSharpSuite.Tests.fsproj", "{C163E892-5BF7-4B59-AA99-B0E8079C67C4}"
ProjectSection(ProjectDependencies) = postProject
{0973C362-585C-4838-9459-D7E45C6B784B} = {0973C362-585C-4838-9459-D7E45C6B784B}
{37EB3E54-ABC6-4CF5-8273-7CE4B61A42C1} = {37EB3E54-ABC6-4CF5-8273-7CE4B61A42C1}
{511C95D9-3BA6-451F-B6F8-F033F40878A5} = {511C95D9-3BA6-451F-B6F8-F033F40878A5}
{597D9896-4B90-4E9E-9C99-445C2CB9FF60} = {597D9896-4B90-4E9E-9C99-445C2CB9FF60}
{E54456F4-D51A-4334-B225-92EBBED92B40} = {E54456F4-D51A-4334-B225-92EBBED92B40}
{EB015235-1E07-4CDA-9CC6-3FBCC27910D1} = {EB015235-1E07-4CDA-9CC6-3FBCC27910D1}
EndProjectSection
EndProject
Project("{6EC3EE1D-3C4E-46DD-8F32-0CC8E7565705}") = "FSharp.Compiler.UnitTests", "tests\FSharp.Compiler.UnitTests\FSharp.Compiler.UnitTests.fsproj", "{A8D9641A-9170-4CF4-8FE0-6DB8C134E1B5}"
EndProject
Expand Down Expand Up @@ -149,8 +157,8 @@ Project("{6EC3EE1D-3C4E-46DD-8F32-0CC8E7565705}") = "FSharp.Compiler.Service", "
EndProject
Project("{6EC3EE1D-3C4E-46DD-8F32-0CC8E7565705}") = "FSharp.Compiler.Service.Tests", "tests\FSharp.Compiler.Service.Tests\FSharp.Compiler.Service.Tests.fsproj", "{14F3D3D6-5C8E-43C2-98A2-17EA704D4DEA}"
ProjectSection(ProjectDependencies) = postProject
{FF76BD3C-5E0A-4752-B6C3-044F6E15719B} = {FF76BD3C-5E0A-4752-B6C3-044F6E15719B}
{887630A3-4B1D-40EA-B8B3-2D842E9C40DB} = {887630A3-4B1D-40EA-B8B3-2D842E9C40DB}
{FF76BD3C-5E0A-4752-B6C3-044F6E15719B} = {FF76BD3C-5E0A-4752-B6C3-044F6E15719B}
EndProjectSection
EndProject
Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "VisualFSharpDebug", "vsintegration\Vsix\VisualFSharpFull\VisualFSharpDebug.csproj", "{A422D673-8E3B-4924-821B-DD3174173426}"
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8 changes: 5 additions & 3 deletions src/Compiler/CodeGen/IlxGen.fs
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Original file line number Diff line number Diff line change
Expand Up @@ -2073,15 +2073,16 @@ type AssemblyBuilder(cenv: cenv, anonTypeTable: AnonTypeGenerationTable) as mgbu
mkILFields
[
for _, fldName, fldTy in flds ->
// Don't hide fields when splitting to multiple assemblies.

let access =
if cenv.options.isInteractive && cenv.options.fsiMultiAssemblyEmit then
ILMemberAccess.Public
else
ILMemberAccess.Private

let fdef = mkILInstanceField (fldName, fldTy, None, access)
fdef.With(customAttrs = mkILCustomAttrs [ g.DebuggerBrowsableNeverAttribute ])
let attrs = [ g.CompilerGeneratedAttribute; g.DebuggerBrowsableNeverAttribute ]
fdef.With(customAttrs = mkILCustomAttrs attrs)
]

// Generate property definitions for the fields compiled as properties
Expand Down Expand Up @@ -10676,7 +10677,8 @@ and GenTypeDef cenv mgbuf lazyInitInfo eenv m (tycon: Tycon) =

let extraAttribs =
match tyconRepr with
| TFSharpRecdRepr _ when not useGenuineField -> [ g.DebuggerBrowsableNeverAttribute ] // hide fields in records in debug display
| TFSharpRecdRepr _ when not useGenuineField ->
[ g.CompilerGeneratedAttribute; g.DebuggerBrowsableNeverAttribute ]
| _ -> [] // don't hide fields in classes in debug display

let access = ComputeMemberAccess isFieldHidden
Expand Down
2 changes: 2 additions & 0 deletions tests/FSharp.Compiler.ComponentTests/EmittedIL/GenericComparison/Compare06.fsx.il.bsl
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Expand Up @@ -66,8 +66,10 @@
{
.custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 02 00 00 00 00 00 )
.field assembly int32 key1@
.custom instance void [System.Runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 )
.custom instance void [System.Runtime]System.Diagnostics.DebuggerBrowsableAttribute::.ctor(valuetype [System.Runtime]System.Diagnostics.DebuggerBrowsableState) = ( 01 00 00 00 00 00 00 00 )
.field assembly int32 key2@
.custom instance void [System.Runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 )
.custom instance void [System.Runtime]System.Diagnostics.DebuggerBrowsableAttribute::.ctor(valuetype [System.Runtime]System.Diagnostics.DebuggerBrowsableState) = ( 01 00 00 00 00 00 00 00 )
.method public hidebysig specialname
instance int32 get_key1() cil managed
Expand Down
2 changes: 2 additions & 0 deletions tests/FSharp.Compiler.ComponentTests/EmittedIL/GenericComparison/Equals05.fsx.il.bsl
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Expand Up @@ -66,8 +66,10 @@
{
.custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 02 00 00 00 00 00 )
.field assembly int32 key1@
.custom instance void [System.Runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 )
.custom instance void [System.Runtime]System.Diagnostics.DebuggerBrowsableAttribute::.ctor(valuetype [System.Runtime]System.Diagnostics.DebuggerBrowsableState) = ( 01 00 00 00 00 00 00 00 )
.field assembly int32 key2@
.custom instance void [System.Runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 )
.custom instance void [System.Runtime]System.Diagnostics.DebuggerBrowsableAttribute::.ctor(valuetype [System.Runtime]System.Diagnostics.DebuggerBrowsableState) = ( 01 00 00 00 00 00 00 00 )
.method public hidebysig specialname
instance int32 get_key1() cil managed
Expand Down
2 changes: 2 additions & 0 deletions tests/FSharp.Compiler.ComponentTests/EmittedIL/GenericComparison/Hash08.fsx.il.bsl
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Expand Up @@ -66,8 +66,10 @@
{
.custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 02 00 00 00 00 00 )
.field assembly int32 key1@
.custom instance void [System.Runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 )
.custom instance void [System.Runtime]System.Diagnostics.DebuggerBrowsableAttribute::.ctor(valuetype [System.Runtime]System.Diagnostics.DebuggerBrowsableState) = ( 01 00 00 00 00 00 00 00 )
.field assembly int32 key2@
.custom instance void [System.Runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 )
.custom instance void [System.Runtime]System.Diagnostics.DebuggerBrowsableAttribute::.ctor(valuetype [System.Runtime]System.Diagnostics.DebuggerBrowsableState) = ( 01 00 00 00 00 00 00 00 )
.method public hidebysig specialname
instance int32 get_key1() cil managed
Expand Down
2 changes: 2 additions & 0 deletions tests/FSharp.Compiler.ComponentTests/EmittedIL/Misc/AnonRecd.fs.il.bsl
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Expand Up @@ -99,8 +99,10 @@
.custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 )
.custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 02 00 00 00 00 00 )
.field private !'<A>j__TPar' A@
.custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 )
.custom instance void [mscorlib]System.Diagnostics.DebuggerBrowsableAttribute::.ctor(valuetype [mscorlib]System.Diagnostics.DebuggerBrowsableState) = ( 01 00 00 00 00 00 00 00 )
.field private !'<B>j__TPar' B@
.custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 )
.custom instance void [mscorlib]System.Diagnostics.DebuggerBrowsableAttribute::.ctor(valuetype [mscorlib]System.Diagnostics.DebuggerBrowsableState) = ( 01 00 00 00 00 00 00 00 )
.method public specialname rtspecialname
instance void .ctor(!'<A>j__TPar' A,
Expand Down
2 changes: 2 additions & 0 deletions tests/FSharp.Compiler.ComponentTests/EmittedIL/TestFunctions/TestFunction17.fs.il.debug.bsl
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Expand Up @@ -62,8 +62,10 @@
{
.custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 02 00 00 00 00 00 )
.field assembly int32 x@
.custom instance void [System.Runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 )
.custom instance void [System.Runtime]System.Diagnostics.DebuggerBrowsableAttribute::.ctor(valuetype [System.Runtime]System.Diagnostics.DebuggerBrowsableState) = ( 01 00 00 00 00 00 00 00 )
.field assembly int32 y@
.custom instance void [System.Runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 )
.custom instance void [System.Runtime]System.Diagnostics.DebuggerBrowsableAttribute::.ctor(valuetype [System.Runtime]System.Diagnostics.DebuggerBrowsableState) = ( 01 00 00 00 00 00 00 00 )
.method public hidebysig specialname
instance int32 get_x() cil managed
Expand Down
2 changes: 2 additions & 0 deletions ...s/FSharp.Compiler.ComponentTests/EmittedIL/TestFunctions/TestFunction17.fs.il.release.bsl
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Original file line number Diff line number Diff line change
Expand Up @@ -62,8 +62,10 @@
{
.custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 02 00 00 00 00 00 )
.field assembly int32 x@
.custom instance void [System.Runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 )
.custom instance void [System.Runtime]System.Diagnostics.DebuggerBrowsableAttribute::.ctor(valuetype [System.Runtime]System.Diagnostics.DebuggerBrowsableState) = ( 01 00 00 00 00 00 00 00 )
.field assembly int32 y@
.custom instance void [System.Runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 )
.custom instance void [System.Runtime]System.Diagnostics.DebuggerBrowsableAttribute::.ctor(valuetype [System.Runtime]System.Diagnostics.DebuggerBrowsableState) = ( 01 00 00 00 00 00 00 00 )
.method public hidebysig specialname
instance int32 get_x() cil managed
Expand Down
2 changes: 2 additions & 0 deletions tests/FSharp.Compiler.ComponentTests/EmittedIL/TestFunctions/TestFunction24.fs.il.debug.bsl
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Original file line number Diff line number Diff line change
Expand Up @@ -62,8 +62,10 @@
{
.custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 02 00 00 00 00 00 )
.field public int32 x@
.custom instance void [System.Runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 )
.custom instance void [System.Runtime]System.Diagnostics.DebuggerBrowsableAttribute::.ctor(valuetype [System.Runtime]System.Diagnostics.DebuggerBrowsableState) = ( 01 00 00 00 00 00 00 00 )
.field public int32 y@
.custom instance void [System.Runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 )
.custom instance void [System.Runtime]System.Diagnostics.DebuggerBrowsableAttribute::.ctor(valuetype [System.Runtime]System.Diagnostics.DebuggerBrowsableState) = ( 01 00 00 00 00 00 00 00 )
.method public hidebysig specialname
instance int32 get_x() cil managed
Expand Down
2 changes: 2 additions & 0 deletions ...s/FSharp.Compiler.ComponentTests/EmittedIL/TestFunctions/TestFunction24.fs.il.release.bsl
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Original file line number Diff line number Diff line change
Expand Up @@ -62,8 +62,10 @@
{
.custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 02 00 00 00 00 00 )
.field public int32 x@
.custom instance void [System.Runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 )
.custom instance void [System.Runtime]System.Diagnostics.DebuggerBrowsableAttribute::.ctor(valuetype [System.Runtime]System.Diagnostics.DebuggerBrowsableState) = ( 01 00 00 00 00 00 00 00 )
.field public int32 y@
.custom instance void [System.Runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 )
.custom instance void [System.Runtime]System.Diagnostics.DebuggerBrowsableAttribute::.ctor(valuetype [System.Runtime]System.Diagnostics.DebuggerBrowsableState) = ( 01 00 00 00 00 00 00 00 )
.method public hidebysig specialname
instance int32 get_x() cil managed
Expand Down
4 changes: 2 additions & 2 deletions tests/FSharp.Test.Utilities/TestFramework.fs
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Original file line number Diff line number Diff line change
Expand Up @@ -652,8 +652,8 @@ let diff normalize path1 path2 =
if x >= 0 then line.Substring(x+cwd.Length) else line
else line

let line1 = normalizePath lines1[i]
let line2 = normalizePath lines2[i]
let line1 = lines1[i] |> normalizePath
let line2 = lines2[i] |> normalizePath

if line1 <> line2 then
append <| sprintf "diff between [%s] and [%s]" path1 path2
Expand Down
53 changes: 53 additions & 0 deletions tests/fsharp/core/printing/output.1000.stdout.bsl
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Expand Up @@ -2764,4 +2764,57 @@ val ShortName: string = "hi"

> val list2: int list = [1]

module FSI_0317.
D27805741a339047ef3ed7a2ca8faae3c17e6ef2371984011e49a6c9c3286641

{"ImmutableField0":6}
type R1 =
{ ImmutableField0: int }
val it: unit = ()

> val it: R1 = { ImmutableField0 = 7 }

> {"MutableField1":8}
type R2 =
{ mutable MutableField1: int }
val it: unit = ()

> val it: R2 = { MutableField1 = 9 }

> {"AnonRecordField2":10}
val it: unit = ()

> val it: {| AnonRecordField2: int |} = { AnonRecordField2 = 11 }

module FSI_0324.Project.fsproj

type R3 =
{ ImmutableField3: int }
val test3a: string = "{"ImmutableField3":12}"

> val test3b: R3 = { ImmutableField3 = 12 }

> val test3c: string = "{"ImmutableField3":13}"

> val test3d: R3 = { ImmutableField3 = 13 }

> type R4 =
{ mutable MutableField4: int }
val test4a: string = "{"MutableField4":15}"

> val test4b: R4 = { MutableField4 = 15 }

> val test4c: string = "{"MutableField4":16}"

> val test4d: R4 = { MutableField4 = 16 }

> type R5 = {| AnonRecordField5: int |}
val test5a: string = "{"AnonRecordField5":17}"

> val test5b: R5 = { AnonRecordField5 = 17 }

> val test5c: string = "{"AnonRecordField5":18}"

> val test5d: R5 = { AnonRecordField5 = 18 }

> > >
53 changes: 53 additions & 0 deletions tests/fsharp/core/printing/output.200.stdout.bsl
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Original file line number Diff line number Diff line change
Expand Up @@ -2009,4 +2009,57 @@ val ShortName: string = "hi"

> val list2: int list = [1]

module FSI_0317.
D27805741a339047ef3ed7a2ca8faae3c17e6ef2371984011e49a6c9c3286641

{"ImmutableField0":6}
type R1 =
{ ImmutableField0: int }
val it: unit = ()

> val it: R1 = { ImmutableField0 = 7 }

> {"MutableField1":8}
type R2 =
{ mutable MutableField1: int }
val it: unit = ()

> val it: R2 = { MutableField1 = 9 }

> {"AnonRecordField2":10}
val it: unit = ()

> val it: {| AnonRecordField2: int |} = { AnonRecordField2 = 11 }

module FSI_0324.Project.fsproj

type R3 =
{ ImmutableField3: int }
val test3a: string = "{"ImmutableField3":12}"

> val test3b: R3 = { ImmutableField3 = 12 }

> val test3c: string = "{"ImmutableField3":13}"

> val test3d: R3 = { ImmutableField3 = 13 }

> type R4 =
{ mutable MutableField4: int }
val test4a: string = "{"MutableField4":15}"

> val test4b: R4 = { MutableField4 = 15 }

> val test4c: string = "{"MutableField4":16}"

> val test4d: R4 = { MutableField4 = 16 }

> type R5 = {| AnonRecordField5: int |}
val test5a: string = "{"AnonRecordField5":17}"

> val test5b: R5 = { AnonRecordField5 = 17 }

> val test5c: string = "{"AnonRecordField5":18}"

> val test5d: R5 = { AnonRecordField5 = 18 }

> > >
108 changes: 108 additions & 0 deletions tests/fsharp/core/printing/output.47.stderr.bsl
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Expand Up @@ -334,3 +334,111 @@ stdin(838,6): error FS1210: Active pattern '|A|B|' has a result type containing

stdin(844,6): error FS1209: Active pattern '|A|B|' is not a function


#r "nuget:Newtonsoft.Json, 13.0.1"
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

stdin(1117,1): error FS3302: The 'package management' feature requires language version 5.0 or above


JsonConvert.SerializeObject { ImmutableField0 = 7 }
^^^^^^^^^^^

stdin(1122,1): error FS0039: The value, namespace, type or module 'JsonConvert' is not defined.


JsonConvert.SerializeObject { MutableField1 = 8 } |> printfn "%s";;
^^^^^^^^^^^

stdin(1126,1): error FS0039: The value, namespace, type or module 'JsonConvert' is not defined.


JsonConvert.SerializeObject { MutableField1 = 9 }
^^^^^^^^^^^

stdin(1128,1): error FS0039: The value, namespace, type or module 'JsonConvert' is not defined.


JsonConvert.SerializeObject {| AnonRecordField2 = 10 |} |> printfn "%s";;
^^^^^^^^^^^

stdin(1131,1): error FS0039: The value, namespace, type or module 'JsonConvert' is not defined.


JsonConvert.SerializeObject {| AnonRecordField2 = 11 |}
^^^^^^^^^^^

stdin(1133,1): error FS0039: The value, namespace, type or module 'JsonConvert' is not defined.


#r "nuget: System.Text.Json"
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

stdin(1136,1): error FS3302: The 'package management' feature requires language version 5.0 or above


let test3b = JsonSerializer.Deserialize<R3> test3a;;
-------------^^^^^^^^^^^^^^

stdin(1140,14): error FS0039: The value, namespace, type or module 'JsonSerializer' is not defined.


let test3c = JsonSerializer.Serialize { ImmutableField3 = 13 };;
-------------^^^^^^^^^^^^^^

stdin(1141,14): error FS0039: The value, namespace, type or module 'JsonSerializer' is not defined.


let test3d = JsonSerializer.Deserialize<R3> test3c;;
-------------^^^^^^^^^^^^^^

stdin(1142,14): error FS0039: The value, namespace, type or module 'JsonSerializer' is not defined.


let test4a = JsonSerializer.Serialize { MutableField4 = 15 };;
-------------^^^^^^^^^^^^^^

stdin(1145,14): error FS0039: The value, namespace, type or module 'JsonSerializer' is not defined.


let test4b = JsonSerializer.Deserialize<R4> test4a;;
-------------^^^^^^^^^^^^^^

stdin(1146,14): error FS0039: The value, namespace, type or module 'JsonSerializer' is not defined.


let test4c = JsonSerializer.Serialize { MutableField4 = 16 };;
-------------^^^^^^^^^^^^^^

stdin(1147,14): error FS0039: The value, namespace, type or module 'JsonSerializer' is not defined.


let test4d = JsonSerializer.Deserialize<R4> test4c;;
-------------^^^^^^^^^^^^^^

stdin(1148,14): error FS0039: The value, namespace, type or module 'JsonSerializer' is not defined.


let test5a = JsonSerializer.Serialize {| AnonRecordField5 = 17 |};;
-------------^^^^^^^^^^^^^^

stdin(1151,14): error FS0039: The value, namespace, type or module 'JsonSerializer' is not defined.


let test5b = JsonSerializer.Deserialize<R5> test5a;;
-------------^^^^^^^^^^^^^^

stdin(1152,14): error FS0039: The value, namespace, type or module 'JsonSerializer' is not defined.


let test5c = JsonSerializer.Serialize {| AnonRecordField5 = 18 |};;
-------------^^^^^^^^^^^^^^

stdin(1153,14): error FS0039: The value, namespace, type or module 'JsonSerializer' is not defined.


let test5d = JsonSerializer.Deserialize<R5> test5c;;
-------------^^^^^^^^^^^^^^

stdin(1154,14): error FS0039: The value, namespace, type or module 'JsonSerializer' is not defined.

2 changes: 1 addition & 1 deletion tests/fsharp/core/printing/output.47.stdout.bsl
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Original file line number Diff line number Diff line change
Expand Up @@ -6309,4 +6309,4 @@ val ShortName: string = "hi"

> val list2: int list = [1]

> > >
> > > > > > > > > > > > > > > > > > > > >
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