class RBS::InheritModuleError

def self.check!(super_decl, env:)
  return if env.class_decl?(super_decl.name) || env.class_alias?(super_decl.name)
  raise new(super_decl)
end

def initialize(super_decl)
  @super_decl = super_decl
  super "#{Location.to_string(super_decl.location)}: Cannot inherit a module: #{super_decl.name}"
end