public PEDeltaAssemblyBuilder(
SourceAssemblySymbol sourceAssembly,
EmitOptions emitOptions,
OutputKind outputKind,
ModulePropertiesForSerialization serializationProperties,
IEnumerable <ResourceDescription> manifestResources,
EmitBaseline previousGeneration,
IEnumerable <SemanticEdit> edits,
Func <ISymbol, bool> isAddedSymbol)
: base(sourceAssembly, emitOptions, outputKind, serializationProperties, manifestResources, assemblySymbolMapper: null, additionalTypes: ImmutableArray <NamedTypeSymbol> .Empty)
{
var initialBaseline = previousGeneration.InitialBaseline;
var context = new EmitContext(this, null, new DiagnosticBag());
var module = previousGeneration.OriginalMetadata;
var compilation = sourceAssembly.DeclaringCompilation;
var metadataAssembly = compilation.GetBoundReferenceManager().CreatePEAssemblyForAssemblyMetadata(AssemblyMetadata.Create(module), MetadataImportOptions.All);
var metadataDecoder = new Symbols.Metadata.PE.MetadataDecoder(metadataAssembly.PrimaryModule);
if (initialBaseline.LazyOriginalMetadataAnonymousTypeMap == null)
{
initialBaseline.LazyOriginalMetadataAnonymousTypeMap = GetAnonymousTypeMapFromMetadata(module.MetadataReader, metadataDecoder);
}
var matchToMetadata = new CSharpSymbolMatcher(initialBaseline.LazyOriginalMetadataAnonymousTypeMap, sourceAssembly, context, metadataAssembly);
CSharpSymbolMatcher matchToPrevious = null;
if (previousGeneration.Ordinal > 0)
{
var previousAssembly = ((CSharpCompilation)previousGeneration.Compilation).SourceAssembly;
var previousContext = new EmitContext((PEModuleBuilder)previousGeneration.PEModuleBuilder, null, new DiagnosticBag());
matchToPrevious = new CSharpSymbolMatcher(
previousGeneration.AnonymousTypeMap,
sourceAssembly: sourceAssembly,
sourceContext: context,
otherAssembly: previousAssembly,
otherContext: previousContext,
otherSynthesizedMembersOpt: previousGeneration.SynthesizedMembers);
}
_previousDefinitions = new CSharpDefinitionMap(previousGeneration.OriginalMetadata.Module, edits, metadataDecoder, matchToMetadata, matchToPrevious);
_previousGeneration = previousGeneration;
_changes = new SymbolChanges(_previousDefinitions, edits, isAddedSymbol);
}
private static IReadOnlyDictionary <AnonymousTypeKey, AnonymousTypeValue> GetAnonymousTypeMapFromMetadata(
MetadataReader reader,
Symbols.Metadata.PE.MetadataDecoder metadataDecoder)
{
var result = new Dictionary <AnonymousTypeKey, AnonymousTypeValue>();
foreach (var handle in reader.TypeDefinitions)
{
var def = reader.GetTypeDefinition(handle);
if (!def.Namespace.IsNil)
{
continue;
}
if (!reader.StringComparer.StartsWith(def.Name, GeneratedNames.AnonymousNamePrefix))
{
continue;
}
var metadataName = reader.GetString(def.Name);
short arity;
var name = MetadataHelpers.InferTypeArityAndUnmangleMetadataName(metadataName, out arity);
int index;
if (GeneratedNames.TryParseAnonymousTypeTemplateName(name, out index))
{
var builder = ArrayBuilder <AnonymousTypeKeyField> .GetInstance();
if (TryGetAnonymousTypeKey(reader, def, builder))
{
var type = (NamedTypeSymbol)metadataDecoder.GetTypeOfToken(handle);
var key = new AnonymousTypeKey(builder.ToImmutable());
var value = new AnonymousTypeValue(name, index, type);
result.Add(key, value);
}
builder.Free();
}
}
return(result);
}