public void HoistedAnonymousTypes_Complex()
{
var source0 = @"
using System;
class C
{
static void F()
{
var x1 = new[] { new { A = new { X = 1 } } };
var x2 = new[] { new { A = new { Y = 1 } } };
var y = new Func<int>(() => x1[0].A.X + x2[0].A.Y);
}
}
";
var source1 = @"
using System;
class C
{
static void F()
{
var x1 = new[] { new { A = new { X = 1 } } };
var x2 = new[] { new { A = new { Z = 1 } } };
var y = new Func<int>(() => x1[0].A.X + x2[0].A.Z);
}
}";
var compilation0 = CreateCompilationWithMscorlib(source0, options: TestOptions.DebugDll);
var peRef0 = compilation0.EmitToImageReference();
var peAssemblySymbol0 = (PEAssemblySymbol)CreateCompilationWithMscorlib("", new[] { peRef0 }).GetReferencedAssemblySymbol(peRef0);
var peModule0 = (PEModuleSymbol)peAssemblySymbol0.Modules[0];
var reader0 = peModule0.Module.MetadataReader;
var decoder0 = new MetadataDecoder(peModule0);
var anonymousTypeMap0 = PEDeltaAssemblyBuilder.GetAnonymousTypeMapFromMetadata(reader0, decoder0);
Assert.Equal("<>f__AnonymousType0", anonymousTypeMap0[new AnonymousTypeKey(ImmutableArray.Create(new AnonymousTypeKeyField("A", isKey: false, ignoreCase: false)))].Name);
Assert.Equal("<>f__AnonymousType1", anonymousTypeMap0[new AnonymousTypeKey(ImmutableArray.Create(new AnonymousTypeKeyField("X", isKey: false, ignoreCase: false)))].Name);
Assert.Equal("<>f__AnonymousType2", anonymousTypeMap0[new AnonymousTypeKey(ImmutableArray.Create(new AnonymousTypeKeyField("Y", isKey: false, ignoreCase: false)))].Name);
Assert.Equal(3, anonymousTypeMap0.Count);
var compilation1 = CreateCompilationWithMscorlib(source1, options: TestOptions.DebugDll);
var testData = new CompilationTestData();
compilation1.EmitToArray(testData: testData);
var peAssemblyBuilder = (PEAssemblyBuilder)testData.Module;
var c = compilation1.GetMember <NamedTypeSymbol>("C");
var displayClass = peAssemblyBuilder.GetSynthesizedTypes(c).Single();
Assert.Equal("<>c__DisplayClass0_0", displayClass.Name);
var emitContext = new EmitContext(peAssemblyBuilder, null, new DiagnosticBag());
var fields = displayClass.GetFields(emitContext).ToArray();
var x1 = fields[0];
var x2 = fields[1];
Assert.Equal("x1", x1.Name);
Assert.Equal("x2", x2.Name);
var matcher = new CSharpSymbolMatcher(anonymousTypeMap0, compilation1.SourceAssembly, emitContext, peAssemblySymbol0);
var mappedX1 = (Cci.IFieldDefinition)matcher.MapDefinition(x1);
var mappedX2 = (Cci.IFieldDefinition)matcher.MapDefinition(x2);
Assert.Equal("x1", mappedX1.Name);
Assert.Null(mappedX2);
}
public void AnonymousTypesWithNullables()
{
var source0 = @"
using System;
class C
{
static T id<T>(T t) => t;
static T F<T>(Func<T> f) => f();
static void M(string? x)
{
var y1 = new { A = id(x) };
var y2 = F(() => new { B = id(x) });
var z = new Func<string>(() => y1.A + y2.B);
}
}";
var source1 = @"
using System;
class C
{
static T id<T>(T t) => t;
static T F<T>(Func<T> f) => f();
static void M(string? x)
{
if (x is null) throw new Exception();
var y1 = new { A = id(x) };
var y2 = F(() => new { B = id(x) });
var z = new Func<string>(() => y1.A + y2.B);
}
}";
var compilation0 = CreateCompilation(source0, options: TestOptions.DebugDll);
var peRef0 = compilation0.EmitToImageReference();
var peAssemblySymbol0 = (PEAssemblySymbol)CreateCompilation("", new[] { peRef0 }).GetReferencedAssemblySymbol(peRef0);
var peModule0 = (PEModuleSymbol)peAssemblySymbol0.Modules[0];
var reader0 = peModule0.Module.MetadataReader;
var decoder0 = new MetadataDecoder(peModule0);
var anonymousTypeMap0 = PEDeltaAssemblyBuilder.GetAnonymousTypeMapFromMetadata(reader0, decoder0);
Assert.Equal("<>f__AnonymousType0", anonymousTypeMap0[new AnonymousTypeKey(ImmutableArray.Create(new AnonymousTypeKeyField("A", isKey: false, ignoreCase: false)))].Name);
Assert.Equal("<>f__AnonymousType1", anonymousTypeMap0[new AnonymousTypeKey(ImmutableArray.Create(new AnonymousTypeKeyField("B", isKey: false, ignoreCase: false)))].Name);
Assert.Equal(2, anonymousTypeMap0.Count);
var compilation1 = CreateCompilation(source1, options: TestOptions.DebugDll);
var testData = new CompilationTestData();
compilation1.EmitToArray(testData: testData);
var peAssemblyBuilder = (PEAssemblyBuilder)testData.Module;
var c = compilation1.GetMember <NamedTypeSymbol>("C");
var displayClass = peAssemblyBuilder.GetSynthesizedTypes(c).Single();
Assert.Equal("<>c__DisplayClass2_0", displayClass.Name);
var emitContext = new EmitContext(peAssemblyBuilder, null, new DiagnosticBag(), metadataOnly: false, includePrivateMembers: true);
var fields = displayClass.GetFields(emitContext).ToArray();
AssertEx.SetEqual(fields.Select(f => f.Name), new[] { "x", "y1", "y2" });
var y1 = fields.Where(f => f.Name == "y1").Single();
var y2 = fields.Where(f => f.Name == "y2").Single();
var matcher = new CSharpSymbolMatcher(anonymousTypeMap0, compilation1.SourceAssembly, emitContext, peAssemblySymbol0);
var mappedY1 = (Cci.IFieldDefinition)matcher.MapDefinition(y1);
var mappedY2 = (Cci.IFieldDefinition)matcher.MapDefinition(y2);
Assert.Equal("y1", mappedY1.Name);
Assert.Equal("y2", mappedY2.Name);
}