|
' Licensed to the .NET Foundation under one or more agreements.
' The .NET Foundation licenses this file to you under the MIT license.
' See the LICENSE file in the project root for more information.
Imports System.Collections.Immutable
Imports Microsoft.CodeAnalysis.PooledObjects
Imports Microsoft.CodeAnalysis.VisualBasic.Symbols
Imports Microsoft.CodeAnalysis.Emit
Namespace Microsoft.CodeAnalysis.VisualBasic
Friend NotInheritable Class NamespaceScopeBuilder
Private Sub New()
End Sub
Public Shared Function BuildNamespaceScope(
moduleBuilder As Emit.PEModuleBuilder,
xmlNamespacesOpt As IReadOnlyDictionary(Of String, XmlNamespaceAndImportsClausePosition),
aliasImportsOpt As IEnumerable(Of AliasAndImportsClausePosition),
memberImports As ImmutableArray(Of NamespaceOrTypeAndImportsClausePosition),
diagnostics As DiagnosticBag
) As ImmutableArray(Of Cci.UsedNamespaceOrType)
Dim scopeBuilder = ArrayBuilder(Of Cci.UsedNamespaceOrType).GetInstance
' first come xml imports
If xmlNamespacesOpt IsNot Nothing Then
For Each xmlImport In xmlNamespacesOpt
scopeBuilder.Add(Cci.UsedNamespaceOrType.CreateXmlNamespace(xmlImport.Key, xmlImport.Value.XmlNamespace))
Next
End If
' then come alias imports
If aliasImportsOpt IsNot Nothing Then
For Each aliasImport In aliasImportsOpt
Dim target = aliasImport.Alias.Target
If target.IsNamespace Then
scopeBuilder.Add(Cci.UsedNamespaceOrType.CreateNamespace(DirectCast(target, NamespaceSymbol).GetCciAdapter(), aliasOpt:=aliasImport.Alias.Name))
ElseIf target.Kind <> SymbolKind.ErrorType AndAlso Not target.ContainingAssembly.IsLinked Then
' It is not an error to import a non-existing type (unlike C#), skip the error types.
' We also skip alias imports of embedded types to avoid breaking existing code that
' imports types that can't be embedded but doesn't use them anywhere else in the code.
Dim typeRef = GetTypeReference(DirectCast(target, NamedTypeSymbol), moduleBuilder, diagnostics)
scopeBuilder.Add(Cci.UsedNamespaceOrType.CreateType(typeRef, aliasOpt:=aliasImport.Alias.Name))
End If
Next
End If
' then come the imports
For Each import In memberImports
Dim target = import.NamespaceOrType
' Imports with erroneous targets are skipped during binding.
Debug.Assert(target.Kind <> SymbolKind.ErrorType)
If target.IsNamespace Then
scopeBuilder.Add(Cci.UsedNamespaceOrType.CreateNamespace(DirectCast(target, NamespaceSymbol).GetCciAdapter()))
ElseIf Not target.ContainingAssembly.IsLinked Then
' We skip imports of embedded types to avoid breaking existing code that
' imports types that can't be embedded but doesn't use them anywhere else in the code.
Dim typeRef = GetTypeReference(DirectCast(target, NamedTypeSymbol), moduleBuilder, diagnostics)
scopeBuilder.Add(Cci.UsedNamespaceOrType.CreateType(typeRef))
End If
Next
Return scopeBuilder.ToImmutableAndFree()
End Function
Private Shared Function GetTypeReference(type As TypeSymbol, moduleBuilder As CommonPEModuleBuilder, diagnostics As DiagnosticBag) As Cci.ITypeReference
Return moduleBuilder.Translate(type, Nothing, diagnostics)
End Function
End Class
End Namespace
|