// Internal for unit tests only.
internal MergedNamespaceDeclaration CalculateMergedRoot(CSharpCompilation compilation)
{
var oldRoot = _cache.MergedRoot.Value;
if (_latestLazyRootDeclaration == null)
{
return(oldRoot);
}
else if (oldRoot == null)
{
return(MergedNamespaceDeclaration.Create(_latestLazyRootDeclaration.Value));
}
else
{
var oldRootDeclarations = oldRoot.Declarations;
var builder = ArrayBuilder <SingleNamespaceDeclaration> .GetInstance(oldRootDeclarations.Length + 1);
builder.AddRange(oldRootDeclarations);
builder.Add(_latestLazyRootDeclaration.Value);
// Sort the root namespace declarations to match the order of SyntaxTrees.
if (compilation != null)
{
builder.Sort(new RootNamespaceLocationComparer(compilation));
}
return(MergedNamespaceDeclaration.Create(builder.ToImmutableAndFree()));
}
}
public static bool ContainsName(
MergedNamespaceDeclaration mergedRoot,
Func <string, bool> predicate,
SymbolFilter filter,
CancellationToken cancellationToken
)
{
return(ContainsNameHelper(
mergedRoot,
predicate,
filter,
t =>
{
foreach (var name in t.MemberNames)
{
if (predicate(name))
{
return true;
}
}
return false;
},
cancellationToken
));
}
public static bool ContainsName(
MergedNamespaceDeclaration mergedRoot,
string name,
SymbolFilter filter,
CancellationToken cancellationToken)
{
return(ContainsNameHelper(
mergedRoot,
n => n == name,
filter,
t => t.MemberNames.Contains(name),
cancellationToken));
}
public Cache(DeclarationTable table)
{
this.MergedRoot = new Lazy <MergedNamespaceDeclaration>(
() => MergedNamespaceDeclaration.Create(table._allOlderRootDeclarations.InInsertionOrder.AsImmutable <SingleNamespaceDeclaration>()));
this.TypeNames = new Lazy <ISet <string> >(
() => GetTypeNames(this.MergedRoot.Value));
this.NamespaceNames = new Lazy <ISet <string> >(
() => GetNamespaceNames(this.MergedRoot.Value));
this.ReferenceDirectives = new Lazy <ImmutableArray <ReferenceDirective> >(
() => MergedRoot.Value.Declarations.OfType <RootSingleNamespaceDeclaration>().SelectMany(r => r.ReferenceDirectives).AsImmutable());
}
// The merged-tree-reuse story goes like this. We have a "forest" of old declarations, and
// possibly a lone tree of new declarations. We construct a merged declaration by merging
// together everything in the forest. This we can re-use from edit to edit, provided that
// nothing is added to or removed from the forest. We construct a merged declaration from
// the lone tree if there is one. (The lone tree might have nodes inside it that need
// merging, if there are two halves of one partial class.) Once we have two merged trees, we
// construct the full merged tree by merging them both together. So, diagrammatically, we
// have:
//
// MergedRoot
// / \
// old merged root new merged root
// / | | | \ \
// old singles forest new single tree
private MergedNamespaceDeclaration GetMergedRoot()
{
var oldRoot = this.cache.MergedRoot.Value;
if (latestLazyRootDeclaration == null)
{
return(oldRoot);
}
else if (oldRoot == null)
{
return(MergedNamespaceDeclaration.Create(latestLazyRootDeclaration.Value));
}
else
{
return(MergedNamespaceDeclaration.Create(oldRoot, latestLazyRootDeclaration.Value));
}
}
private ImmutableArray <MergedNamespaceOrTypeDeclaration> MakeChildren()
{
ArrayBuilder <SingleNamespaceDeclaration> namespaces = null;
ArrayBuilder <SingleTypeDeclaration> types = null;
bool allNamespacesHaveSameName = true;
bool allTypesHaveSameIdentity = true;
foreach (var decl in declarations)
{
foreach (var child in decl.Children)
{
// it is either a type (more likely)
var asType = child as SingleTypeDeclaration;
if (asType != null)
{
// handle types
if (types == null)
{
types = ArrayBuilder <SingleTypeDeclaration> .GetInstance();
}
else if (allTypesHaveSameIdentity && !asType.Identity.Equals(types[0].Identity))
{
allTypesHaveSameIdentity = false;
}
types.Add(asType);
continue;
}
// or it is a namespace
var asNamespace = child as SingleNamespaceDeclaration;
if (asNamespace != null)
{
// handle namespace
if (namespaces == null)
{
namespaces = ArrayBuilder <SingleNamespaceDeclaration> .GetInstance();
}
else if (allNamespacesHaveSameName && !asNamespace.Name.Equals(namespaces[0].Name))
{
allNamespacesHaveSameName = false;
}
namespaces.Add(asNamespace);
continue;
}
// Not sure if we can get here, perhaps, if we have errors,
// but we care only about types and namespaces anyways.
}
}
var children = ArrayBuilder <MergedNamespaceOrTypeDeclaration> .GetInstance();
if (namespaces != null)
{
if (allNamespacesHaveSameName)
{
children.Add(MergedNamespaceDeclaration.Create(namespaces.ToImmutableAndFree()));
}
else
{
var namespaceGroups = namespaces.ToDictionary(n => n.Name);
namespaces.Free();
foreach (var namespaceGroup in namespaceGroups.Values)
{
children.Add(MergedNamespaceDeclaration.Create(namespaceGroup));
}
}
}
if (types != null)
{
if (allTypesHaveSameIdentity)
{
children.Add(new MergedTypeDeclaration(types.ToImmutableAndFree()));
}
else
{
var typeGroups = types.ToDictionary(t => t.Identity);
types.Free();
foreach (var typeGroup in typeGroups.Values)
{
children.Add(new MergedTypeDeclaration(typeGroup));
}
}
}
return(children.ToImmutableAndFree());
}
public static MergedNamespaceDeclaration Create(
MergedNamespaceDeclaration mergedDeclaration,
SingleNamespaceDeclaration declaration)
{
return(new MergedNamespaceDeclaration(mergedDeclaration.declarations.Add(declaration)));
}
public static MergedNamespaceDeclaration Create(
MergedNamespaceDeclaration mergedDeclaration,
SingleNamespaceDeclaration declaration)
{
return new MergedNamespaceDeclaration(mergedDeclaration._declarations.Add(declaration));
}
private static bool ContainsNameHelper(
MergedNamespaceDeclaration mergedRoot,
Func <string, bool> predicate,
SymbolFilter filter,
Func <SingleTypeDeclaration, bool> typePredicate,
CancellationToken cancellationToken)
{
var includeNamespace = (filter & SymbolFilter.Namespace) == SymbolFilter.Namespace;
var includeType = (filter & SymbolFilter.Type) == SymbolFilter.Type;
var includeMember = (filter & SymbolFilter.Member) == SymbolFilter.Member;
var stack = new Stack <MergedNamespaceOrTypeDeclaration>();
stack.Push(mergedRoot);
while (stack.Count > 0)
{
cancellationToken.ThrowIfCancellationRequested();
var current = stack.Pop();
if (current == null)
{
continue;
}
if (current.Kind == DeclarationKind.Namespace)
{
if (includeNamespace && predicate(current.Name))
{
return(true);
}
}
else
{
if (includeType && predicate(current.Name))
{
return(true);
}
if (includeMember)
{
var mergedType = (MergedTypeDeclaration)current;
foreach (var typeDecl in mergedType.Declarations)
{
if (typePredicate(typeDecl))
{
return(true);
}
}
}
}
foreach (var child in current.Children)
{
if (child is MergedNamespaceOrTypeDeclaration childNamespaceOrType)
{
if (includeMember || includeType || childNamespaceOrType.Kind == DeclarationKind.Namespace)
{
stack.Push(childNamespaceOrType);
}
}
}
}
return(false);
}