private async Task <ProjectMap> CreateProjectMapAsync(ConcurrentSet <SymbolGroup> symbolGroups, CancellationToken cancellationToken)
{
using (Logger.LogBlock(FunctionId.FindReference_CreateProjectMapAsync, cancellationToken))
{
var projectMap = new ProjectMap();
var scope = _documents?.Select(d => d.Project).ToImmutableHashSet();
foreach (var symbolGroup in symbolGroups)
{
foreach (var symbol in symbolGroup.Symbols)
{
cancellationToken.ThrowIfCancellationRequested();
var projects = await DependentProjectsFinder.GetDependentProjectsAsync(
_solution, symbol, scope, cancellationToken).ConfigureAwait(false);
foreach (var project in projects.Distinct().WhereNotNull())
{
if (scope == null || scope.Contains(project))
{
projectMap.MultiAdd(project, symbol);
}
}
}
}
Contract.ThrowIfTrue(projectMap.Any(kvp => kvp.Value.Count != kvp.Value.ToSet().Count));
return(projectMap);
}
}