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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#nullable disable
using Microsoft.CodeAnalysis.CSharp.Symbols;
using Microsoft.CodeAnalysis.CSharp.UnitTests;
using Microsoft.CodeAnalysis.Emit;
using Roslyn.Test.Utilities;
using Xunit;
namespace Microsoft.CodeAnalysis.CSharp.Semantic.UnitTests.Semantics
{
public class ValueTupleTests : CompilingTestBase
{
[Fact]
public void TestWellKnownMembersForValueTuple()
{
var source = @"
namespace System
{
struct ValueTuple<T1>
{
public T1 Item1;
}
struct ValueTuple<T1, T2>
{
public T1 Item1;
public T2 Item2;
}
struct ValueTuple<T1, T2, T3>
{
public T1 Item1;
public T2 Item2;
public T3 Item3;
}
struct ValueTuple<T1, T2, T3, T4>
{
public T1 Item1;
public T2 Item2;
public T3 Item3;
public T4 Item4;
}
struct ValueTuple<T1, T2, T3, T4, T5>
{
public T1 Item1;
public T2 Item2;
public T3 Item3;
public T4 Item4;
public T5 Item5;
}
struct ValueTuple<T1, T2, T3, T4, T5, T6>
{
public T1 Item1;
public T2 Item2;
public T3 Item3;
public T4 Item4;
public T5 Item5;
public T6 Item6;
}
struct ValueTuple<T1, T2, T3, T4, T5, T6, T7>
{
public T1 Item1;
public T2 Item2;
public T3 Item3;
public T4 Item4;
public T5 Item5;
public T6 Item6;
public T7 Item7;
}
struct ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>
{
public T1 Item1;
public T2 Item2;
public T3 Item3;
public T4 Item4;
public T5 Item5;
public T6 Item6;
public T7 Item7;
public TRest Rest;
}
}";
var comp = CreateCompilation(source);
Assert.Equal("T1 System.ValueTuple<T1>.Item1",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T1__Item1).ToTestDisplayString());
Assert.Equal("T1 (T1, T2).Item1",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T2__Item1).ToTestDisplayString());
Assert.Equal("T2 (T1, T2).Item2",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T2__Item2).ToTestDisplayString());
Assert.Equal("T1 (T1, T2, T3).Item1",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T3__Item1).ToTestDisplayString());
Assert.Equal("T2 (T1, T2, T3).Item2",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T3__Item2).ToTestDisplayString());
Assert.Equal("T3 (T1, T2, T3).Item3",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T3__Item3).ToTestDisplayString());
Assert.Equal("T1 (T1, T2, T3, T4).Item1",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T4__Item1).ToTestDisplayString());
Assert.Equal("T2 (T1, T2, T3, T4).Item2",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T4__Item2).ToTestDisplayString());
Assert.Equal("T3 (T1, T2, T3, T4).Item3",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T4__Item3).ToTestDisplayString());
Assert.Equal("T4 (T1, T2, T3, T4).Item4",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T4__Item4).ToTestDisplayString());
Assert.Equal("T1 (T1, T2, T3, T4, T5).Item1",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T5__Item1).ToTestDisplayString());
Assert.Equal("T2 (T1, T2, T3, T4, T5).Item2",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T5__Item2).ToTestDisplayString());
Assert.Equal("T3 (T1, T2, T3, T4, T5).Item3",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T5__Item3).ToTestDisplayString());
Assert.Equal("T4 (T1, T2, T3, T4, T5).Item4",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T5__Item4).ToTestDisplayString());
Assert.Equal("T5 (T1, T2, T3, T4, T5).Item5",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T5__Item5).ToTestDisplayString());
Assert.Equal("T1 (T1, T2, T3, T4, T5, T6).Item1",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T6__Item1).ToTestDisplayString());
Assert.Equal("T2 (T1, T2, T3, T4, T5, T6).Item2",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T6__Item2).ToTestDisplayString());
Assert.Equal("T3 (T1, T2, T3, T4, T5, T6).Item3",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T6__Item3).ToTestDisplayString());
Assert.Equal("T4 (T1, T2, T3, T4, T5, T6).Item4",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T6__Item4).ToTestDisplayString());
Assert.Equal("T5 (T1, T2, T3, T4, T5, T6).Item5",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T6__Item5).ToTestDisplayString());
Assert.Equal("T6 (T1, T2, T3, T4, T5, T6).Item6",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T6__Item6).ToTestDisplayString());
Assert.Equal("T1 (T1, T2, T3, T4, T5, T6, T7).Item1",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T7__Item1).ToTestDisplayString());
Assert.Equal("T2 (T1, T2, T3, T4, T5, T6, T7).Item2",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T7__Item2).ToTestDisplayString());
Assert.Equal("T3 (T1, T2, T3, T4, T5, T6, T7).Item3",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T7__Item3).ToTestDisplayString());
Assert.Equal("T4 (T1, T2, T3, T4, T5, T6, T7).Item4",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T7__Item4).ToTestDisplayString());
Assert.Equal("T5 (T1, T2, T3, T4, T5, T6, T7).Item5",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T7__Item5).ToTestDisplayString());
Assert.Equal("T6 (T1, T2, T3, T4, T5, T6, T7).Item6",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T7__Item6).ToTestDisplayString());
Assert.Equal("T7 (T1, T2, T3, T4, T5, T6, T7).Item7",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T7__Item7).ToTestDisplayString());
Assert.Equal("T1 System.ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>.Item1",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_TRest__Item1).ToTestDisplayString());
Assert.Equal("T2 System.ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>.Item2",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_TRest__Item2).ToTestDisplayString());
Assert.Equal("T3 System.ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>.Item3",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_TRest__Item3).ToTestDisplayString());
Assert.Equal("T4 System.ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>.Item4",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_TRest__Item4).ToTestDisplayString());
Assert.Equal("T5 System.ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>.Item5",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_TRest__Item5).ToTestDisplayString());
Assert.Equal("T6 System.ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>.Item6",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_TRest__Item6).ToTestDisplayString());
Assert.Equal("T7 System.ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>.Item7",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_TRest__Item7).ToTestDisplayString());
Assert.Equal("TRest System.ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>.Rest",
comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_TRest__Rest).ToTestDisplayString());
}
[Fact]
public void TestMissingWellKnownMembersForValueTuple()
{
var comp = CreateCompilationWithMscorlib40("");
Assert.True(comp.GetWellKnownType(WellKnownType.System_ValueTuple_T1).IsErrorType());
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T1__Item1));
Assert.True(comp.GetWellKnownType(WellKnownType.System_ValueTuple_T2).IsErrorType());
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T2__Item1));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T2__Item2));
Assert.True(comp.GetWellKnownType(WellKnownType.System_ValueTuple_T3).IsErrorType());
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T3__Item1));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T3__Item2));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T3__Item3));
Assert.True(comp.GetWellKnownType(WellKnownType.System_ValueTuple_T4).IsErrorType());
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T4__Item1));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T4__Item2));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T4__Item3));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T4__Item4));
Assert.True(comp.GetWellKnownType(WellKnownType.System_ValueTuple_T5).IsErrorType());
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T5__Item1));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T5__Item2));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T5__Item3));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T5__Item4));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T5__Item5));
Assert.True(comp.GetWellKnownType(WellKnownType.System_ValueTuple_T6).IsErrorType());
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T6__Item1));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T6__Item2));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T6__Item3));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T6__Item4));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T6__Item6));
Assert.True(comp.GetWellKnownType(WellKnownType.System_ValueTuple_T7).IsErrorType());
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T7__Item1));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T7__Item2));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T7__Item3));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T7__Item4));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T7__Item6));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_T7__Item7));
Assert.True(comp.GetWellKnownType(WellKnownType.System_ValueTuple_TRest).IsErrorType());
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_TRest__Item1));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_TRest__Item2));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_TRest__Item3));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_TRest__Item4));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_TRest__Item6));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_TRest__Item7));
Assert.Null(comp.GetWellKnownTypeMember(WellKnownMember.System_ValueTuple_TRest__Rest));
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/60961")]
public void MissingRest()
{
var source = """
(int i1, int i2, int i3, int i4, int i5, int i6, int i7, int i8) tuple = (1, 2, 3, 4, 5, 6, 7, 8);
(_, _, _, _, _, _, _, int x) = tuple;
System.Console.WriteLine(x);
namespace System
{
public struct ValueTuple<T1>
{
public T1 Item1;
public ValueTuple(T1 item1)
{
Item1 = item1;
}
}
public struct ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>
{
public T1 Item1;
public T2 Item2;
public T3 Item3;
public T4 Item4;
public T5 Item5;
public T6 Item6;
public T7 Item7;
// public TRest Rest;
public ValueTuple(T1 item1, T2 item2, T3 item3, T4 item4, T5 item5, T6 item6, T7 item7, TRest rest)
{
Item1 = item1;
Item2 = item2;
Item3 = item3;
Item4 = item4;
Item5 = item5;
Item6 = item6;
Item7 = item7;
// Rest = rest;
}
}
}
""";
var comp = CreateCompilation(source, assemblyName: "comp");
comp.VerifyDiagnostics();
comp.VerifyEmitDiagnostics(
// (2,32): error CS8128: Member 'Rest' was not found on type 'ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>' from assembly 'comp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'.
// (_, _, _, _, _, _, _, int x) = tuple;
Diagnostic(ErrorCode.ERR_PredefinedTypeMemberNotFoundInAssembly, "tuple").WithArguments("Rest", "System.ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>", "comp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null").WithLocation(2, 32));
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/60961")]
public void ExplicitInterfaceImplementation_Indexer_Partial()
{
var source = """
namespace System
{
public struct ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest> : System.IEquatable<(T1, T2, T3, T4, T5, T6, T7, TRest)> where TRest : struct
{
public T1 Item1;
public T2 Item2;
public T3 Item3;
public T4 Item4;
public T5 Item5;
public T6 Item6;
public T7 Item7;
public TRest Rest;
object System.Runtime.CompilerServices.ITuple.this[int index] => throw null;
}
}
""";
var comp = CreateCompilation(source, targetFramework: TargetFramework.NetCoreApp);
comp.VerifyDiagnostics(
// (3,67): error CS0535: 'ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>' does not implement interface member 'IEquatable<(T1, T2, T3, T4, T5, T6, T7, TRest)>.Equals((T1, T2, T3, T4, T5, T6, T7, TRest))'
// public struct ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest> : System.IEquatable<(T1, T2, T3, T4, T5, T6, T7, TRest)> where TRest : struct
Diagnostic(ErrorCode.ERR_UnimplementedInterfaceMember, "System.IEquatable<(T1, T2, T3, T4, T5, T6, T7, TRest)>").WithArguments("System.ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>", "System.IEquatable<(T1, T2, T3, T4, T5, T6, T7, TRest)>.Equals((T1, T2, T3, T4, T5, T6, T7, TRest))").WithLocation(3, 67),
// (13,16): error CS0540: 'ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>.ITuple.this[int]': containing type does not implement interface 'ITuple'
// object System.Runtime.CompilerServices.ITuple.this[int index] => throw null;
Diagnostic(ErrorCode.ERR_ClassDoesntImplementInterface, "System.Runtime.CompilerServices.ITuple").WithArguments("System.ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>.System.Runtime.CompilerServices.ITuple.this[int]", "System.Runtime.CompilerServices.ITuple").WithLocation(13, 16));
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/60961")]
public void ExplicitInterfaceImplementation_Indexer()
{
var source = """
namespace System
{
public struct ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest> :
System.IEquatable<(T1, T2, T3, T4, T5, T6, T7, TRest)>,
System.Runtime.CompilerServices.ITuple
where TRest : struct
{
public T1 Item1;
public T2 Item2;
public T3 Item3;
public T4 Item4;
public T5 Item5;
public T6 Item6;
public T7 Item7;
public TRest Rest;
public int Length => throw null;
object System.Runtime.CompilerServices.ITuple.this[int index] => throw null;
bool System.IEquatable<(T1, T2, T3, T4, T5, T6, T7, TRest)>.Equals((T1, T2, T3, T4, T5, T6, T7, TRest) other) => false;
}
}
""";
var comp = CreateCompilation(source, targetFramework: TargetFramework.NetCoreApp);
comp.VerifyEmitDiagnostics();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/60961")]
public void ExplicitInterfaceImplementation_Property()
{
var source = """
namespace System
{
public struct ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest> :
System.IEquatable<(T1, T2, T3, T4, T5, T6, T7, TRest)>,
System.Runtime.CompilerServices.ITuple
where TRest : struct
{
public T1 Item1;
public T2 Item2;
public T3 Item3;
public T4 Item4;
public T5 Item5;
public T6 Item6;
public T7 Item7;
public TRest Rest;
int System.Runtime.CompilerServices.ITuple.Length => throw null;
public object this[int index] => throw null;
bool System.IEquatable<(T1, T2, T3, T4, T5, T6, T7, TRest)>.Equals((T1, T2, T3, T4, T5, T6, T7, TRest) other) => false;
}
}
""";
var comp = CreateCompilation(source, targetFramework: TargetFramework.NetCoreApp);
comp.VerifyEmitDiagnostics();
}
private const string Stubs = """
namespace System
{
public class Object { }
public class ValueType { }
public class String { }
public struct Void { }
public struct Boolean { }
public struct Int32 { }
public struct IntPtr { }
public class Exception { }
public class MulticastDelegate { }
public struct ValueTuple<T> { }
public class Enum { }
public class Attribute { }
public enum AttributeTargets { }
public class AttributeUsageAttribute
{
public AttributeUsageAttribute(AttributeTargets validOn) { }
public bool AllowMultiple { get; set; }
public bool Inherited { get; set; }
}
namespace Reflection
{
public class DefaultMemberAttribute
{
public DefaultMemberAttribute(string memberName) { }
}
}
}
""";
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/60961")]
public void ExplicitInterfaceImplementation_Event()
{
var source = """
namespace System
{
public struct ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest> :
System.IEquatable<(T1, T2, T3, T4, T5, T6, T7, TRest)>,
System.Runtime.CompilerServices.ITuple
where TRest : struct
{
public T1 Item1;
public T2 Item2;
public T3 Item3;
public T4 Item4;
public T5 Item5;
public T6 Item6;
public T7 Item7;
public TRest Rest;
public int Length => throw null;
public object this[int index] => throw null;
public bool Equals((T1, T2, T3, T4, T5, T6, T7, TRest) other) => throw null;
event D System.Runtime.CompilerServices.ITuple.Tupled
{
add => throw null;
remove => throw null;
}
}
public interface IEquatable<T>
{
bool Equals(T other);
}
namespace Runtime.CompilerServices
{
public interface ITuple
{
event D Tupled;
int Length { get; }
object this[int index] { get; }
}
}
public delegate void D();
}
""";
var comp = CreateEmptyCompilation(new[] { source, Stubs });
comp.VerifyEmitDiagnostics(EmitOptions.Default.WithRuntimeMetadataVersion("0.0.0.0"));
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/60961")]
public void ExplicitInterfaceImplementation_Operator()
{
var source = """
namespace System
{
public struct ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest> :
System.IEquatable<(T1, T2, T3, T4, T5, T6, T7, TRest)>,
System.Runtime.CompilerServices.ITuple
where TRest : struct
{
public T1 Item1;
public T2 Item2;
public T3 Item3;
public T4 Item4;
public T5 Item5;
public T6 Item6;
public T7 Item7;
public TRest Rest;
public int Length => throw null;
public object this[int index] => throw null;
public bool Equals((T1, T2, T3, T4, T5, T6, T7, TRest) other) => throw null;
static System.Runtime.CompilerServices.ITuple System.Runtime.CompilerServices.ITuple.operator +(System.Runtime.CompilerServices.ITuple a, System.Runtime.CompilerServices.ITuple b) => throw null;
}
public interface IEquatable<T>
{
bool Equals(T other);
}
namespace Runtime.CompilerServices
{
public interface ITuple
{
abstract static ITuple operator +(ITuple a, ITuple b);
int Length { get; }
object this[int index] { get; }
}
public static class RuntimeFeature
{
public const string VirtualStaticsInInterfaces = nameof(VirtualStaticsInInterfaces);
}
}
}
""";
var comp = CreateEmptyCompilation(new[] { source, Stubs });
comp.VerifyEmitDiagnostics(EmitOptions.Default.WithRuntimeMetadataVersion("0.0.0.0"));
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/60961")]
public void ExplicitInterfaceImplementation_ConversionOperator()
{
var source = """
namespace System
{
public struct ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest> :
System.IEquatable<(T1, T2, T3, T4, T5, T6, T7, TRest)>,
System.Runtime.CompilerServices.ITuple<ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>>
where TRest : struct
{
public T1 Item1;
public T2 Item2;
public T3 Item3;
public T4 Item4;
public T5 Item5;
public T6 Item6;
public T7 Item7;
public TRest Rest;
public int Length => throw null;
public object this[int index] => throw null;
public bool Equals((T1, T2, T3, T4, T5, T6, T7, TRest) other) => throw null;
static explicit System.Runtime.CompilerServices.ITuple<ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>>.operator string(ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest> x) => throw null;
}
public interface IEquatable<T>
{
bool Equals(T other);
}
namespace Runtime.CompilerServices
{
public interface ITuple<T> where T : ITuple<T>
{
abstract static explicit operator string(T x);
int Length { get; }
object this[int index] { get; }
}
public static class RuntimeFeature
{
public const string VirtualStaticsInInterfaces = nameof(VirtualStaticsInInterfaces);
}
}
}
""";
var comp = CreateEmptyCompilation(new[] { source, Stubs });
comp.VerifyEmitDiagnostics(EmitOptions.Default.WithRuntimeMetadataVersion("0.0.0.0"));
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/60961")]
public void ExplicitInterfaceImplementation_GenericProperty()
{
var source = """
namespace System
{
public struct ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest> :
System.IEquatable<(T1, T2, T3, T4, T5, T6, T7, TRest)>,
System.Runtime.CompilerServices.ITuple<ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>>
where TRest : struct
{
public T1 Item1;
public T2 Item2;
public T3 Item3;
public T4 Item4;
public T5 Item5;
public T6 Item6;
public T7 Item7;
public TRest Rest;
int System.Runtime.CompilerServices.ITuple<ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>>.Length => throw null;
ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest> System.Runtime.CompilerServices.ITuple<ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>>.Self => throw null;
object System.Runtime.CompilerServices.ITuple<ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>>.this[int index] => throw null;
ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest> System.Runtime.CompilerServices.ITuple<ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>>.this[ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest> self, int index] => throw null;
bool System.IEquatable<(T1, T2, T3, T4, T5, T6, T7, TRest)>.Equals((T1, T2, T3, T4, T5, T6, T7, TRest) other) => false;
}
public interface IEquatable<T>
{
bool Equals(T other);
}
namespace Runtime.CompilerServices
{
public interface ITuple<T> where T : ITuple<T>
{
int Length { get; }
T Self { get; }
object this[int index] { get; }
T this[T self, int index] { get; }
}
}
}
""";
var comp = CreateEmptyCompilation(new[] { source, Stubs });
comp.VerifyEmitDiagnostics(EmitOptions.Default.WithRuntimeMetadataVersion("0.0.0.0"));
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/60961")]
public void ExplicitInterfaceImplementation_TupleInSignatureOnly()
{
var source = """
namespace System
{
public struct ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest> :
System.Runtime.CompilerServices.ITuple<T1, T2, T3, T4, T5, T6, T7, TRest>
where TRest : struct
{
public T1 Item1;
public T2 Item2;
public T3 Item3;
public T4 Item4;
public T5 Item5;
public T6 Item6;
public T7 Item7;
public TRest Rest;
int System.Runtime.CompilerServices.ITuple<T1, T2, T3, T4, T5, T6, T7, TRest>.Length => throw null;
(T1, T2, T3, T4, T5, T6, T7, TRest) System.Runtime.CompilerServices.ITuple<T1, T2, T3, T4, T5, T6, T7, TRest>.Self => throw null;
object System.Runtime.CompilerServices.ITuple<T1, T2, T3, T4, T5, T6, T7, TRest>.this[int index] => throw null;
(T1, T2, T3, T4, T5, T6, T7, TRest) System.Runtime.CompilerServices.ITuple<T1, T2, T3, T4, T5, T6, T7, TRest>.this[(T1, T2, T3, T4, T5, T6, T7, TRest) self, int index] => throw null;
bool System.Runtime.CompilerServices.ITuple<T1, T2, T3, T4, T5, T6, T7, TRest>.Equals((T1, T2, T3, T4, T5, T6, T7, TRest) other) => false;
}
namespace Runtime.CompilerServices
{
public interface ITuple<T1, T2, T3, T4, T5, T6, T7, TRest>
{
int Length { get; }
(T1, T2, T3, T4, T5, T6, T7, TRest) Self { get; }
object this[int index] { get; }
(T1, T2, T3, T4, T5, T6, T7, TRest) this[(T1, T2, T3, T4, T5, T6, T7, TRest) self, int index] { get; }
bool Equals((T1, T2, T3, T4, T5, T6, T7, TRest) other);
}
}
}
""";
var comp = CreateEmptyCompilation(new[] { source, Stubs });
comp.VerifyEmitDiagnostics(EmitOptions.Default.WithRuntimeMetadataVersion("0.0.0.0"));
}
}
}
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