public ImportScopeEntry(PEFile module, MetadataReader metadata, bool isEmbedded, ImportScopeHandle handle)
{
this.offset = isEmbedded ? null : (int?)metadata.GetTableMetadataOffset(TableIndex.ImportScope)
+ metadata.GetTableRowSize(TableIndex.ImportScope) * (MetadataTokens.GetRowNumber(handle) - 1);
this.module = module;
this.metadata = metadata;
this.handle = handle;
this.localScope = metadata.GetImportScope(handle);
}
private static void PopulateImports(
MetadataReader reader,
ImportScopeHandle handle,
EESymbolProvider <TTypeSymbol, TLocalSymbol> symbolProvider,
bool isVisualBasicMethod,
ArrayBuilder <ImmutableArray <ImportRecord> > importGroupsBuilder,
ArrayBuilder <ExternAliasRecord> externAliasesBuilder
)
{
var importGroupBuilder = ArrayBuilder <ImportRecord> .GetInstance();
while (!handle.IsNil)
{
var importScope = reader.GetImportScope(handle);
try
{
PopulateImports(
reader,
importScope,
symbolProvider,
importGroupBuilder,
externAliasesBuilder
);
}
catch (BadImageFormatException)
{
// ignore invalid imports
}
// Portable PDBs represent project-level scope as the root of the chain of scopes.
// This scope might contain aliases for assembly references, but is not considered
// to be part of imports groups.
if (isVisualBasicMethod || !importScope.Parent.IsNil)
{
importGroupsBuilder.Add(importGroupBuilder.ToImmutable());
importGroupBuilder.Clear();
}
else
{
// C# currently doesn't support global imports in PDBs
// https://github.com/dotnet/roslyn/issues/21862
Debug.Assert(importGroupBuilder.Count == 0);
}
handle = importScope.Parent;
}
importGroupBuilder.Free();
}
private static void PopulateImports(
MetadataReader reader,
ImportScopeHandle handle,
EESymbolProvider <TTypeSymbol, TLocalSymbol> symbolProvider,
bool isVisualBasicMethod,
ArrayBuilder <ImmutableArray <ImportRecord> > importGroupsBuilder,
ArrayBuilder <ExternAliasRecord> externAliasesBuilder)
{
var importGroupBuilder = ArrayBuilder <ImportRecord> .GetInstance();
while (!handle.IsNil)
{
var importScope = reader.GetImportScope(handle);
try
{
PopulateImports(reader, importScope, symbolProvider, importGroupBuilder, externAliasesBuilder);
}
catch (BadImageFormatException)
{
// ignore invalid imports
}
// VB always expects two import groups (even if they are empty).
// TODO: consider doing this for C# as well and handle empty groups in the binder.
if (isVisualBasicMethod || importGroupBuilder.Count > 0)
{
importGroupsBuilder.Add(importGroupBuilder.ToImmutable());
importGroupBuilder.Clear();
}
handle = importScope.Parent;
}
importGroupBuilder.Free();
}
/// <exception cref="BadImageFormatException">Invalid data format.</exception>
private static void PopulateImports(
MetadataReader reader,
ImportScopeHandle handle,
EESymbolProvider <TTypeSymbol, TLocalSymbol> symbolProvider,
bool isVisualBasicMethod,
ArrayBuilder <ImmutableArray <ImportRecord> > importGroupsBuilder,
ArrayBuilder <ExternAliasRecord> externAliasesBuilder)
{
var importGroupBuilder = ArrayBuilder <ImportRecord> .GetInstance();
while (!handle.IsNil)
{
var importScope = reader.GetImportScope(handle);
foreach (ImportDefinition import in importScope.GetImports())
{
switch (import.Kind)
{
case ImportDefinitionKind.ImportNamespace:
importGroupBuilder.Add(new ImportRecord(
ImportTargetKind.Namespace,
targetString: ReadUtf8String(reader, import.TargetNamespace)));
break;
case ImportDefinitionKind.ImportAssemblyNamespace:
importGroupBuilder.Add(new ImportRecord(
ImportTargetKind.Namespace,
targetString: ReadUtf8String(reader, import.TargetNamespace),
targetAssembly: symbolProvider.GetReferencedAssembly(import.TargetAssembly)));
break;
case ImportDefinitionKind.ImportType:
importGroupBuilder.Add(new ImportRecord(
ImportTargetKind.Type,
targetType: symbolProvider.GetType(import.TargetType)));
break;
case ImportDefinitionKind.ImportXmlNamespace:
importGroupBuilder.Add(new ImportRecord(
ImportTargetKind.XmlNamespace,
alias: ReadUtf8String(reader, import.Alias),
targetString: ReadUtf8String(reader, import.TargetNamespace)));
break;
case ImportDefinitionKind.ImportAssemblyReferenceAlias:
importGroupBuilder.Add(new ImportRecord(
ImportTargetKind.Assembly,
alias: ReadUtf8String(reader, import.Alias)));
break;
case ImportDefinitionKind.AliasAssemblyReference:
externAliasesBuilder.Add(new ExternAliasRecord(
alias: ReadUtf8String(reader, import.Alias),
targetAssembly: symbolProvider.GetReferencedAssembly(import.TargetAssembly)));
break;
case ImportDefinitionKind.AliasNamespace:
importGroupBuilder.Add(new ImportRecord(
ImportTargetKind.Namespace,
alias: ReadUtf8String(reader, import.Alias),
targetString: ReadUtf8String(reader, import.TargetNamespace)));
break;
case ImportDefinitionKind.AliasAssemblyNamespace:
importGroupBuilder.Add(new ImportRecord(
ImportTargetKind.Namespace,
alias: ReadUtf8String(reader, import.Alias),
targetString: ReadUtf8String(reader, import.TargetNamespace),
targetAssembly: symbolProvider.GetReferencedAssembly(import.TargetAssembly)));
break;
case ImportDefinitionKind.AliasType:
importGroupBuilder.Add(new ImportRecord(
ImportTargetKind.Type,
alias: ReadUtf8String(reader, import.Alias),
targetType: symbolProvider.GetType(import.TargetType)));
break;
}
}
// VB always expects two import groups (even if they are empty).
// TODO: consider doing this for C# as well and handle empty groups in the binder.
if (isVisualBasicMethod || importGroupBuilder.Count > 0)
{
importGroupsBuilder.Add(importGroupBuilder.ToImmutable());
importGroupBuilder.Clear();
}
handle = importScope.Parent;
}
importGroupBuilder.Free();
}
public static ImportScope GetImportScope(this ImportScopeHandle handle, MetadataReader reader) => reader.GetImportScope(handle);