class TypeProf::Core::NilFilter

# File bundled-src/typeprof-0.31.1/lib/typeprof/core/graph/filter.rb, line 9
def initialize(genv, node, prev_vtx, allow_nil)
  @node = node
  @next_vtx = Vertex.new(node)
  @allow_nil = allow_nil
  prev_vtx.add_edge(genv, self)
end

# File bundled-src/typeprof-0.31.1/lib/typeprof/core/graph/filter.rb, line 18
def filter(types, nil_type)
  types.select {|ty| (ty == nil_type) == @allow_nil }
end

# File bundled-src/typeprof-0.31.1/lib/typeprof/core/graph/filter.rb, line 22
def on_type_added(genv, src_var, added_types)
  types = filter(added_types, genv.nil_type)
  @next_vtx.on_type_added(genv, self, types) unless types.empty?
end

# File bundled-src/typeprof-0.31.1/lib/typeprof/core/graph/filter.rb, line 27
def on_type_removed(genv, src_var, removed_types)
  types = filter(removed_types, genv.nil_type)
  @next_vtx.on_type_removed(genv, self, types) unless types.empty?
end

# File bundled-src/typeprof-0.31.1/lib/typeprof/core/graph/filter.rb, line 34
def to_s
  "NF#{ @id ||= $new_id += 1 } -> #{ @next_vtx }"
end