private static List <ITypeSymbol> GetUsedTypesRecursively(CSharpCompilation compilation, SyntaxTree sourceTree, ref List <ITypeSymbol> currentUsedTypes, ref List <SourceSyntaxTree> sourceSyntaxTrees)
{
List <string> copyCurrentUsedTypes = currentUsedTypes.Select(CT => GetFullyQualifiedTypeName(CT)).ToList();
List <ITypeSymbol> usedTypes = GetUsedTypes(compilation, sourceTree)
.Where(T => !copyCurrentUsedTypes.Contains(GetFullyQualifiedTypeName(T)))
.ToList();
currentUsedTypes.AddRange(usedTypes);
List <SyntaxTree> searchTrees = new List <SyntaxTree>();
foreach (ITypeSymbol symbol in usedTypes)
{
SyntaxReference sr = symbol.DeclaringSyntaxReferences.FirstOrDefault();
if (sr != null)
{
SourceSyntaxTree sst = sourceSyntaxTrees.FirstOrDefault(SST => SST.SyntaxTree == sr.SyntaxTree);
if (sst != null)
{
sst.UsedTypes.Add(symbol);
}
string fullyQualifiedTypeName = GetFullyQualifiedTypeName(symbol);
searchTrees.Add(sr.SyntaxTree);
}
}
searchTrees = searchTrees.Distinct().ToList();
foreach (SyntaxTree tree in searchTrees)
{
List <ITypeSymbol> newTypes = GetUsedTypesRecursively(compilation, tree, ref currentUsedTypes, ref sourceSyntaxTrees);
currentUsedTypes.AddRange(newTypes);
}
return(currentUsedTypes);
}
private static HashSet <ITypeSymbol> GetUsedTypesRecursively(CSharpCompilation compilation, SyntaxTree sourceTree, ref HashSet <ITypeSymbol> currentUsedTypes, ref List <SourceSyntaxTree> sourceSyntaxTrees)
{
HashSet <string> copyCurrentUsedTypes = currentUsedTypes.Select(CT => GetFullyQualifiedTypeName(CT)).ToHashSet();
HashSet <ITypeSymbol> usedTypes = GetUsedTypes(compilation, sourceTree);
currentUsedTypes.UnionWith(usedTypes);
HashSet <SyntaxTree> searchTrees = new HashSet <SyntaxTree>();
foreach (ITypeSymbol symbol in usedTypes)
{
SyntaxReference sr = symbol.DeclaringSyntaxReferences.FirstOrDefault();
if (sr != null)
{
SourceSyntaxTree sst = sourceSyntaxTrees.FirstOrDefault(SST => SST.SyntaxTree == sr.SyntaxTree);
if (sst != null)
{
sst.UsedTypes.Add(symbol);
}
string fullyQualifiedTypeName = GetFullyQualifiedTypeName(symbol);
searchTrees.Add(sr.SyntaxTree);
}
}
searchTrees.Remove(sourceTree);
foreach (SyntaxTree tree in searchTrees)
{
HashSet <ITypeSymbol> newTypes = GetUsedTypesRecursively(compilation, tree, ref currentUsedTypes, ref sourceSyntaxTrees);
currentUsedTypes.UnionWith(newTypes);
}
return(currentUsedTypes);
}
