private static async Task <GraphNodeId> GetPartialForNamedTypeAsync(INamedTypeSymbol namedType, GraphNodeIdName nodeName, Solution solution, CancellationToken cancellationToken, bool isInGenericArguments = false)
{
// If this is a simple type, then we don't have much to do
if (namedType.ContainingType == null && namedType.ConstructedFrom == namedType && namedType.Arity == 0)
{
return(GraphNodeId.GetPartial(nodeName, namedType.Name));
}
else
{
// For a generic type, we need to populate "type" property with the following form:
//
// Type = (Name =...GenericParameterCount = GenericArguments =...ParentType =...)
//
// where "Name" contains a symbol name
// and "GenericParameterCount" contains the number of type parameters,
// and "GenericArguments" contains its type parameters' node information.
// and "ParentType" contains its containing type's node information.
var partials = new List <GraphNodeId>();
partials.Add(GraphNodeId.GetPartial(CodeQualifiedName.Name, namedType.Name));
if (namedType.Arity > 0)
{
partials.Add(GraphNodeId.GetPartial(CodeGraphNodeIdName.GenericParameterCountIdentifier, namedType.Arity.ToString()));
}
// For the property "GenericArguments", we only populate them
// when type parameters are constructed using instance types (i.e., namedType.ConstructedFrom != namedType).
// However, there is a case where we need to populate "GenericArguments" even though arguments are not marked as "constructed"
// because a symbol is not marked as "constructed" when a type is constructed using its own type parameters.
// To distinguish this case, we use "isInGenericArguments" flag which we pass either to populate arguments recursively or to populate "ParentType".
bool hasGenericArguments = (namedType.ConstructedFrom != namedType || isInGenericArguments) && namedType.TypeArguments != null && namedType.TypeArguments.Any();
if (hasGenericArguments)
{
var genericArguments = new List <GraphNodeId>();
foreach (var arg in namedType.TypeArguments)
{
var nodes = await GetPartialsForNamespaceAndTypeAsync(arg, includeNamespace : true, solution : solution, cancellationToken : cancellationToken, isInGenericArguments : true).ConfigureAwait(false);
genericArguments.Add(GraphNodeId.GetNested(nodes.ToArray()));
}
partials.Add(GraphNodeId.GetArray(
CodeGraphNodeIdName.GenericArgumentsIdentifier,
genericArguments.ToArray()));
}
if (namedType.ContainingType != null)
{
partials.Add(await GetPartialForTypeAsync(namedType.ContainingType, CodeGraphNodeIdName.ParentType, solution, cancellationToken, hasGenericArguments).ConfigureAwait(false));
}
return(GraphNodeId.GetPartial(nodeName, MakeCollectionIfNecessary(false, partials.ToArray())));
}
}
public static async Task <GraphNodeId> GetIdForMemberAsync(ISymbol member, Solution solution, CancellationToken cancellationToken)
{
var partials = new List <GraphNodeId>();
partials.AddRange(await GetPartialsForNamespaceAndTypeAsync(member.ContainingType, true, solution, cancellationToken).ConfigureAwait(false));
var parameters = member.GetParameters();
if (parameters.Any() || member.GetArity() > 0)
{
var memberPartials = new List <GraphNodeId>();
memberPartials.Add(GraphNodeId.GetPartial(CodeQualifiedName.Name, member.MetadataName));
if (member.GetArity() > 0)
{
memberPartials.Add(GraphNodeId.GetPartial(CodeGraphNodeIdName.GenericParameterCountIdentifier, member.GetArity().ToString()));
}
if (parameters.Any())
{
var parameterTypeIds = new List <GraphNodeId>();
foreach (var p in parameters)
{
var parameterIds = await GetPartialsForNamespaceAndTypeAsync(p.Type, true, solution, cancellationToken).ConfigureAwait(false);
var nodes = parameterIds.ToList();
if (p.IsRefOrOut())
{
nodes.Add(GraphNodeId.GetPartial(CodeGraphNodeIdName.ParamKind, ParamKind.Ref));
}
parameterTypeIds.Add(GraphNodeId.GetNested(nodes.ToArray()));
}
if (member is IMethodSymbol methodSymbol && methodSymbol.MethodKind == MethodKind.Conversion)
{
// For explicit/implicit conversion operators, we need to include the return type in the method Id,
// because there can be several conversion operators with same parameters and only differ by return type.
// For example,
//
// public class Class1
// {
// public static explicit (explicit) operator int(Class1 c) { ... }
// public static explicit (explicit) operator double(Class1 c) { ... }
// }
var nodes = await GetPartialsForNamespaceAndTypeAsync(methodSymbol.ReturnType, true, solution, cancellationToken).ConfigureAwait(false);
List <GraphNodeId> returnTypePartial = nodes.ToList();
returnTypePartial.Add(GraphNodeId.GetPartial(CodeGraphNodeIdName.ParamKind, Microsoft.VisualStudio.GraphModel.CodeSchema.ParamKind.Return));
GraphNodeId returnCollection = GraphNodeId.GetNested(returnTypePartial.ToArray());
parameterTypeIds.Add(returnCollection);
}
memberPartials.Add(GraphNodeId.GetArray(
CodeGraphNodeIdName.OverloadingParameters,
parameterTypeIds.ToArray()));
}
partials.Add(GraphNodeId.GetPartial(
CodeGraphNodeIdName.Member,
MakeCollectionIfNecessary(false, memberPartials.ToArray())));
}
else
{
partials.Add(GraphNodeId.GetPartial(CodeGraphNodeIdName.Member, member.MetadataName));
}
return(GraphNodeId.GetNested(partials.ToArray()));
}
