Gem::Resolver.new

# File tmp/rubies/ruby-4.1.0-preview1/lib/rubygems/resolver.rb, line 106
def initialize(needed, set = nil)
  @set = set || Gem::Resolver::IndexSet.new
  @needed = needed

  @cooldown            = nil
  @development         = false
  @development_shallow = false
  @ignore_dependencies = false
  @skip_gems           = {}
  @soft_missing        = false

  @root_package = RootPackage.new
  @root_version = Gem::PubGrub::Package.root_version

  @packages = {}

  @unfiltered_specs = Hash.new {|h, name| h[name] = find_unfiltered_specs_for(name) }
  @all_specs = Hash.new {|h, name| h[name] = filter_specs(@unfiltered_specs[name]) }
  @all_versions = Hash.new {|h, pkg| h[pkg] = @all_specs[pkg.to_s].map(&:version).uniq.sort }
  @sorted_versions = Hash.new do |h, pkg|
    h[pkg] = Gem::PubGrub::Package.root?(pkg) ? [@root_version] : @all_versions[pkg]
  end
  @cached_dependencies = Hash.new do |h, pkg|
    h[pkg] = if Gem::PubGrub::Package.root?(pkg)
      { @root_version => root_dependencies }
    else
      Hash.new {|v, ver| v[ver] = compute_dependencies(pkg, ver) }
    end
  end
  @version_to_index = Hash.new {|h, pkg| h[pkg] = @sorted_versions[pkg].each_with_index.to_h }
  @versions_for_cache = Hash.new {|h, pkg| h[pkg] = {} }
  @spec_for_cache = Hash.new {|h, name| h[name] = build_spec_for_cache(name) }
end