Add additional location tests.

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

@@ -4830,6 +4830,8 @@ public void CreateTupleTypeSymbol_WithValueTuple()
             Assert.True(tupleWithoutNames.TupleElementNames.IsDefault);
             Assert.Equal(new[] { "System.Int32", "System.String" }, tupleWithoutNames.TupleElementTypes.Select(t => t.ToTestDisplayString()));
             Assert.Equal(SymbolKind.NamedType, tupleWithoutNames.Kind);
+            Assert.All(tupleWithoutNames.GetMembers().OfType<IFieldSymbol>().Select(f => f.Locations.FirstOrDefault()),
+                loc => Assert.Equal(loc, null));
         }
 
         [Fact]
@@ -4873,6 +4875,8 @@ public void CreateTupleTypeSymbol_NoNames()
             Assert.True(tupleWithoutNames.TupleElementNames.IsDefault);
             Assert.Equal(new[] { "System.Int32", "System.String" }, tupleWithoutNames.TupleElementTypes.Select(t => t.ToTestDisplayString()));
             Assert.Equal(SymbolKind.NamedType, tupleWithoutNames.Kind);
+            Assert.All(tupleWithoutNames.GetMembers().OfType<IFieldSymbol>().Select(f => f.Locations.FirstOrDefault()),
+                loc => Assert.Equal(loc, null));
         }
 
         [Fact]
@@ -4890,6 +4894,8 @@ public void CreateTupleTypeSymbol_WithNames()
             Assert.Equal(new[] { "Alice", "Bob" }, tupleWithNames.TupleElementNames);
             Assert.Equal(new[] { "System.Int32", "System.String" }, tupleWithNames.TupleElementTypes.Select(t => t.ToTestDisplayString()));
             Assert.Equal(SymbolKind.NamedType, tupleWithNames.Kind);
+            Assert.All(tupleWithNames.GetMembers().OfType<IFieldSymbol>().Select(f => f.Locations.FirstOrDefault()),
+                loc => Assert.Equal(loc, null));
         }
 
         [Fact]
@@ -4907,6 +4913,8 @@ public void CreateTupleTypeSymbol_WithSomeNames()
             Assert.Equal(new[] { null, "Item2", "Charlie" }, tupleWithSomeNames.TupleElementNames);
             Assert.Equal(new[] { "System.Int32", "System.String", "System.Int32" }, tupleWithSomeNames.TupleElementTypes.Select(t => t.ToTestDisplayString()));
             Assert.Equal(SymbolKind.NamedType, tupleWithSomeNames.Kind);
+            Assert.All(tupleWithSomeNames.GetMembers().OfType<IFieldSymbol>().Select(f => f.Locations.FirstOrDefault()),
+                loc => Assert.Equal(loc, null));
         }
 
         [Fact]
@@ -4923,6 +4931,8 @@ public void CreateTupleTypeSymbol_WithBadNames()
             Assert.Equal(new[] { "Item2", "Item1" }, tupleWithNames.TupleElementNames);
             Assert.Equal(new[] { "System.Int32", "System.Int32" }, tupleWithNames.TupleElementTypes.Select(t => t.ToTestDisplayString()));
             Assert.Equal(SymbolKind.NamedType, tupleWithNames.Kind);
+            Assert.All(tupleWithNames.GetMembers().OfType<IFieldSymbol>().Select(f => f.Locations.FirstOrDefault()),
+                loc => Assert.Equal(loc, null));
         }
 
         [Fact]
@@ -4945,6 +4955,8 @@ public void CreateTupleTypeSymbol_Tuple8NoNames()
 
             Assert.Equal(new[] { "System.Int32", "System.String", "System.Int32", "System.String", "System.Int32", "System.String", "System.Int32", "System.String" },
                         tuple8WithoutNames.TupleElementTypes.Select(t => t.ToTestDisplayString()));
+            Assert.All(tuple8WithoutNames.GetMembers().OfType<IFieldSymbol>().Select(f => f.Locations.FirstOrDefault()),
+                loc => Assert.Equal(loc, null));
         }
 
         [Fact]
@@ -4968,6 +4980,8 @@ public void CreateTupleTypeSymbol_Tuple8WithNames()
 
             Assert.Equal(new[] { "System.Int32", "System.String", "System.Int32", "System.String", "System.Int32", "System.String", "System.Int32", "System.String" },
                         tuple8WithNames.TupleElementTypes.Select(t => t.ToTestDisplayString()));
+            Assert.All(tuple8WithNames.GetMembers().OfType<IFieldSymbol>().Select(f => f.Locations.FirstOrDefault()),
+                loc => Assert.Equal(loc, null));
         }
 
         [Fact]
@@ -4991,6 +5005,8 @@ public void CreateTupleTypeSymbol_Tuple9NoNames()
 
             Assert.Equal(new[] { "System.Int32", "System.String", "System.Int32", "System.String", "System.Int32", "System.String", "System.Int32", "System.String", "System.Int32" },
                         tuple9WithoutNames.TupleElementTypes.Select(t => t.ToTestDisplayString()));
+            Assert.All(tuple9WithoutNames.GetMembers().OfType<IFieldSymbol>().Select(f => f.Locations.FirstOrDefault()),
+                loc => Assert.Equal(loc, null));
         }
 
         [Fact]
@@ -5014,6 +5030,9 @@ public void CreateTupleTypeSymbol_Tuple9WithNames()
 
             Assert.Equal(new[] { "System.Int32", "System.String", "System.Int32", "System.String", "System.Int32", "System.String", "System.Int32", "System.String", "System.Int32" },
                         tuple9WithNames.TupleElementTypes.Select(t => t.ToTestDisplayString()));
+
+            Assert.All(tuple9WithNames.GetMembers().OfType<IFieldSymbol>().Select(f => f.Locations.FirstOrDefault()),
+                loc => Assert.Equal(loc, null));
         }
 
         [Fact]
@@ -5040,6 +5059,9 @@ public void CreateTupleTypeSymbol_Tuple9WithDefaultNames()
 
             Assert.Equal(new[] { "System.Int32", "System.String", "System.Int32", "System.String", "System.Int32", "System.String", "System.Int32", "System.Int32", "System.Int32" },
                         tuple9WithNames.TupleElementTypes.Select(t => t.ToTestDisplayString()));
+
+            Assert.All(tuple9WithNames.GetMembers().OfType<IFieldSymbol>().Select(f => f.Locations.FirstOrDefault()),
+                loc => Assert.Equal(loc, null));
         }
 
         [Fact]
@@ -5060,6 +5082,8 @@ public void CreateTupleTypeSymbol_ElementTypeIsError()
             Assert.Equal(2, types.Length);
             Assert.Equal(SymbolKind.NamedType, types[0].Kind);
             Assert.Equal(SymbolKind.ErrorType, types[1].Kind);
+            Assert.All(tupleWithoutNames.GetMembers().OfType<IFieldSymbol>().Select(f => f.Locations.FirstOrDefault()),
+                loc => Assert.Equal(loc, null));
         }
 
         [Fact, WorkItem(13277, "https://github.com/dotnet/roslyn/issues/13277")]

src/Compilers/Core/Portable/Compilation/Compilation.cs

@@ -885,7 +885,8 @@ protected static ImmutableArray<string> CheckTupleElementNames(int cardinality,
             return elementNames;
         }
 
-        protected static void CheckTupleElementLocations(int cardinality, 
+        protected static void CheckTupleElementLocations(
+            int cardinality, 
             ImmutableArray<Location> elementLocations)
         {
             if (!elementLocations.IsDefault)

src/Compilers/VisualBasic/Test/Emit/CodeGen/CodeGenTuples.vb

@@ -5059,7 +5059,8 @@ End Class
             Assert.True(tupleWithoutNames.TupleElementNames.IsDefault)
             Assert.Equal(New String() {"System.Int32", "System.String"}, tupleWithoutNames.TupleElementTypes.Select(Function(t) t.ToTestDisplayString()))
             Assert.Equal(SymbolKind.NamedType, tupleWithoutNames.Kind)
-
+            Assert.All(tupleWithoutNames.GetMembers().OfType(Of IFieldSymbol)().Select(Function(f) f.Locations.FirstOrDefault()),
+                Sub(Loc) Assert.Equal(Loc, Nothing))
         End Sub
 
         <Fact>
@@ -5107,7 +5108,8 @@ End Class
             Assert.True(tupleWithoutNames.TupleElementNames.IsDefault)
             Assert.Equal(New String() {"System.Int32", "System.String"}, tupleWithoutNames.TupleElementTypes.Select(Function(t) t.ToTestDisplayString()))
             Assert.Equal(SymbolKind.NamedType, tupleWithoutNames.Kind)
-
+            Assert.All(tupleWithoutNames.GetMembers().OfType(Of IFieldSymbol)().Select(Function(f) f.Locations.FirstOrDefault()),
+                Sub(Loc) Assert.Equal(Loc, Nothing))
         End Sub
 
         <Fact>
@@ -5126,7 +5128,8 @@ End Class
             Assert.Equal(New String() {"Alice", "Bob"}, tupleWithoutNames.TupleElementNames)
             Assert.Equal(New String() {"System.Int32", "System.String"}, tupleWithoutNames.TupleElementTypes.Select(Function(t) t.ToTestDisplayString()))
             Assert.Equal(SymbolKind.NamedType, tupleWithoutNames.Kind)
-
+            Assert.All(tupleWithoutNames.GetMembers().OfType(Of IFieldSymbol)().Select(Function(f) f.Locations.FirstOrDefault()),
+                Sub(Loc) Assert.Equal(Loc, Nothing))
         End Sub
 
         <Fact>
@@ -5148,7 +5151,8 @@ End Class
                          tupleWithSomeNames.TupleElementTypes.Select(Function(t) t.ToTestDisplayString()))
 
             Assert.Equal(SymbolKind.NamedType, tupleWithSomeNames.Kind)
-
+            Assert.All(tupleWithSomeNames.GetMembers().OfType(Of IFieldSymbol)().Select(Function(f) f.Locations.FirstOrDefault()),
+                Sub(Loc) Assert.Equal(Loc, Nothing))
         End Sub
 
         <Fact>
@@ -5165,7 +5169,8 @@ End Class
             Assert.Equal(New String() {"Item2", "Item1"}, tupleWithoutNames.TupleElementNames)
             Assert.Equal(New String() {"System.Int32", "System.Int32"}, tupleWithoutNames.TupleElementTypes.Select(Function(t) t.ToTestDisplayString()))
             Assert.Equal(SymbolKind.NamedType, tupleWithoutNames.Kind)
-
+            Assert.All(tupleWithoutNames.GetMembers().OfType(Of IFieldSymbol)().Select(Function(f) f.Locations.FirstOrDefault()),
+                Sub(Loc) Assert.Equal(Loc, Nothing))
         End Sub
 
         <Fact>
@@ -5189,7 +5194,8 @@ End Class
 
             Assert.Equal(New String() {"System.Int32", "System.String", "System.Int32", "System.String", "System.Int32", "System.String", "System.Int32", "System.String"},
                          tuple8WithoutNames.TupleElementTypes.Select(Function(t) t.ToTestDisplayString()))
-
+            Assert.All(tuple8WithoutNames.GetMembers().OfType(Of IFieldSymbol)().Select(Function(f) f.Locations.FirstOrDefault()),
+                Sub(Loc) Assert.Equal(Loc, Nothing))
         End Sub
 
         <Fact>
@@ -5213,7 +5219,8 @@ End Class
 
             Assert.Equal(New String() {"System.Int32", "System.String", "System.Int32", "System.String", "System.Int32", "System.String", "System.Int32", "System.String"},
                          tuple8WithNames.TupleElementTypes.Select(Function(t) t.ToTestDisplayString()))
-
+            Assert.All(tuple8WithNames.GetMembers().OfType(Of IFieldSymbol)().Select(Function(f) f.Locations.FirstOrDefault()),
+                Sub(Loc) Assert.Equal(Loc, Nothing))
         End Sub
 
         <Fact>
@@ -5237,7 +5244,8 @@ End Class
 
             Assert.Equal(New String() {"System.Int32", "System.String", "System.Int32", "System.String", "System.Int32", "System.String", "System.Int32", "System.String", "System.Int32"},
                          tuple9WithoutNames.TupleElementTypes.Select(Function(t) t.ToTestDisplayString()))
-
+            Assert.All(tuple9WithoutNames.GetMembers().OfType(Of IFieldSymbol)().Select(Function(f) f.Locations.FirstOrDefault()),
+                Sub(Loc) Assert.Equal(Loc, Nothing))
         End Sub
 
         <Fact>
@@ -5261,7 +5269,8 @@ End Class
 
             Assert.Equal(New String() {"System.Int32", "System.String", "System.Int32", "System.String", "System.Int32", "System.String", "System.Int32", "System.String", "System.Int32"},
                          tuple9WithNames.TupleElementTypes.Select(Function(t) t.ToTestDisplayString()))
-
+            Assert.All(tuple9WithNames.GetMembers().OfType(Of IFieldSymbol)().Select(Function(f) f.Locations.FirstOrDefault()),
+                Sub(Loc) Assert.Equal(Loc, Nothing))
         End Sub
 
         <Fact>
@@ -5285,7 +5294,8 @@ End Class
 
             Assert.Equal(New String() {"System.Int32", "System.String", "System.Int32", "System.String", "System.Int32", "System.String", "System.Int32", "System.String", "System.Int32"},
                          tuple9WithNames.TupleElementTypes.Select(Function(t) t.ToTestDisplayString()))
-
+            Assert.All(tuple9WithNames.GetMembers().OfType(Of IFieldSymbol)().Select(Function(f) f.Locations.FirstOrDefault()),
+                Sub(Loc) Assert.Equal(Loc, Nothing))
         End Sub
 
         <Fact>
@@ -5308,7 +5318,8 @@ End Class
             Assert.Equal(2, types.Length)
             Assert.Equal(SymbolKind.NamedType, types(0).Kind)
             Assert.Equal(SymbolKind.ErrorType, types(1).Kind)
-
+            Assert.All(tupleWithoutNames.GetMembers().OfType(Of IFieldSymbol)().Select(Function(f) f.Locations.FirstOrDefault()),
+                Sub(Loc) Assert.Equal(Loc, Nothing))
         End Sub
 
         <Fact>