Tuples: removing more PROTOTYPE markers (#10919)

src/Compilers/CSharp/Portable/Symbols/NamedTypeSymbol.cs

@@ -653,8 +653,7 @@ internal override bool Equals(TypeSymbol t2, bool ignoreCustomModifiersAndArrayS
                     }
                 }
 
-                // PROTOTYPE(tuples): rename ignoreDynamic or introduce another "ignoreTuple" flag
-                //                    if ignoring dynamic, compare underlying tuple types
+                // If ignoring dynamic, compare underlying tuple types
                 if (t2.IsTupleType)
                 {
                     t2 = ((TupleTypeSymbol)t2).UnderlyingTupleType;

src/Compilers/CSharp/Portable/Symbols/TupleFieldSymbol.cs

@@ -199,7 +199,6 @@ internal override ObsoleteAttributeData ObsoleteAttributeData
         {
             get
             {
-                // PROTOTYPE(tuples): need to figure what is the right behavior when underlying is obsolete
                 return null;
             }
         }

src/Compilers/CSharp/Test/Emit/CodeGen/CodeGenTupleTest.cs

@@ -3084,69 +3084,6 @@ static void Main()
             );
         }
 
-        // PROTOTYPE(tuples): this test is for a precedent reference
-        //                    it does not test tuples and should be removed or moved to appropriate location
-        [Fact]
-        public void InterpolatedConvertedType()
-        {
-            var source = @"
-class C
-{
-    static void Main()
-    {
-        System.IFormattable x = (System.IFormattable)$""qq {1} qq"";
-    }
-}
-" + trivial2uple + trivial3uple;
-
-            var tree = Parse(source);
-            var comp = CreateCompilationWithMscorlib(tree);
-
-            var model = comp.GetSemanticModel(tree, ignoreAccessibility: false);
-            var nodes = tree.GetCompilationUnitRoot().DescendantNodes();
-            var node = nodes.OfType<InterpolatedStringExpressionSyntax>().Single();
-
-            Assert.Equal(@"$""qq {1} qq""", node.ToString());
-            Assert.Equal("System.String", model.GetTypeInfo(node).Type.ToTestDisplayString());
-            Assert.Equal("System.String", model.GetTypeInfo(node).ConvertedType.ToTestDisplayString());
-            Assert.Equal(Conversion.Identity, model.GetConversion(node));
-            Assert.Equal(Conversion.Identity, model.GetConversion(node.Parent));
-
-            var x = nodes.OfType<VariableDeclaratorSyntax>().First();
-            Assert.Equal("System.IFormattable x", model.GetDeclaredSymbol(x).ToTestDisplayString());
-        }
-
-        // PROTOTYPE(tuples): this test is for a precedent reference
-        //                    it does not test tuples and should be removed or moved to appropriate location
-        [Fact]
-        public void InterpolatedConvertedTypeInSource()
-        {
-            var source = @"
-class C
-{
-    static void Main()
-    {
-        System.IFormattable x = $""qq {1} qq"";
-    }
-}
-" + trivial2uple + trivial3uple;
-
-            var tree = Parse(source);
-            var comp = CreateCompilationWithMscorlib(tree);
-
-            var model = comp.GetSemanticModel(tree, ignoreAccessibility: false);
-            var nodes = tree.GetCompilationUnitRoot().DescendantNodes();
-            var node = nodes.OfType<InterpolatedStringExpressionSyntax>().Single();
-
-            Assert.Equal(@"$""qq {1} qq""", node.ToString());
-            Assert.Equal("System.String", model.GetTypeInfo(node).Type.ToTestDisplayString());
-            Assert.Equal("System.IFormattable", model.GetTypeInfo(node).ConvertedType.ToTestDisplayString());
-            Assert.Equal(Conversion.InterpolatedString, model.GetConversion(node));
-
-            var x = nodes.OfType<VariableDeclaratorSyntax>().First();
-            Assert.Equal("System.IFormattable x", model.GetDeclaredSymbol(x).ToTestDisplayString());
-        }
-
         [Fact]
         public void TupleConvertedType01()
         {

src/Compilers/VisualBasic/Portable/Symbols/TypeSymbol.vb

@@ -454,7 +454,6 @@ Done:
 
         Private ReadOnly Property ITypeSymbol_IsTupleSymbol As Boolean Implements ITypeSymbol.IsTupleType
             Get
-                ' PROTOTYPE(tuples): VB does not yet support tuples.
                 Return False
             End Get
         End Property

src/Features/CSharp/Portable/Completion/SuggestionMode/CSharpSuggestionModeCompletionProvider.cs

@@ -47,8 +47,6 @@ protected override async Task<CompletionItem> GetBuilderAsync(Document document,
                 {
                     return CreateBuilder(text, position, CSharpFeaturesResources.LambdaExpression, CSharpFeaturesResources.AutoselectDisabledDueToPotentialLambdaDeclaration);
                 }
-                // PROTOTYPE(tuples): tuples in this context are very much like a kind of anonymous type
-                //                    I wonder if we need a special CSharpFeaturesResources or just generalize the existing one
                 else if (IsAnonymousObjectCreation(token) || IsPossibleTupleExpression(token))
                 {
                     return CreateBuilder(text, position, CSharpFeaturesResources.MemberName, CSharpFeaturesResources.AutoselectDisabledDueToPossibleExplicitlyNamesAnonTypeMemCreation);