Class: RBS::EnvironmentWalker

Inherits:
Object
  • Object
show all
Includes:
TSort
Defined in:
lib/rbs/environment_walker.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(env:) ⇒ EnvironmentWalker

Returns a new instance of EnvironmentWalker.



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# File 'lib/rbs/environment_walker.rb', line 5

def initialize(env:)
  @env = env
  @only_ancestors = nil
end

Instance Attribute Details

#env ⇒ Object (readonly)

Returns the value of attribute env.



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# File 'lib/rbs/environment_walker.rb', line 3

def env
  @env
end

Instance Method Details

#builder ⇒ Object 



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# File 'lib/rbs/environment_walker.rb', line 10

def builder
  @builder ||= DefinitionBuilder.new(env: env)
end

#each_type_name(type, &block) ⇒ Object 



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# File 'lib/rbs/environment_walker.rb', line 73

def each_type_name(type, &block)
  case type
  when RBS::Types::Bases::Any
  when RBS::Types::Bases::Class
  when RBS::Types::Bases::Instance
  when RBS::Types::Bases::Self
  when RBS::Types::Bases::Top
  when RBS::Types::Bases::Bottom
  when RBS::Types::Bases::Bool
  when RBS::Types::Bases::Void
  when RBS::Types::Bases::Nil
  when RBS::Types::Variable
  when RBS::Types::ClassSingleton
    yield type.name
  when RBS::Types::ClassInstance, RBS::Types::Interface
    yield type.name
    type.args.each do |ty|
      each_type_name(ty, &block)
    end
  when RBS::Types::Alias
    yield type.name
  when RBS::Types::Union, RBS::Types::Intersection, RBS::Types::Tuple
    type.types.each do |ty|
      each_type_name ty, &block
    end
  when RBS::Types::Optional
    each_type_name type.type, &block
  when RBS::Types::Literal
    # nop
  when RBS::Types::Record
    type.fields.each_value do |ty|
      each_type_name ty, &block
    end
  when RBS::Types::Proc
    type.each_type do |ty|
      each_type_name ty, &block
    end
  else
    raise "Unexpected type given: #{type}"
  end
end

#only_ancestors!(only = true) ⇒ Object 



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# File 'lib/rbs/environment_walker.rb', line 14

def only_ancestors!(only = true)
  @only_ancestors = only
  self
end

#only_ancestors? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rbs/environment_walker.rb', line 19

def only_ancestors?
  @only_ancestors
end

#tsort_each_child(name, &block) ⇒ Object 



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# File 'lib/rbs/environment_walker.rb', line 31

def tsort_each_child(name, &block)
  unless name.namespace.empty?
    yield name.namespace.to_type_name
  end

  case
  when name.class?, name.interface?
    definitions = []

    case
    when name.class?
      definitions << builder.build_instance(name)
      definitions << builder.build_singleton(name)
    when name.interface?
      definitions << builder.build_interface(name)
    end

    definitions.each do |definition|
      if ancestors = definition.ancestors
        ancestors.ancestors.each do |ancestor|
          yield ancestor.name

          case ancestor
          when Definition::Ancestor::Instance
            ancestor.args.each do |type|
              each_type_name type, &block
            end
          end
        end
      end

      unless only_ancestors?
        definition.each_type do |type|
          each_type_name type, &block
        end
      end
    end
  when name.alias?
    each_type_name builder.expand_alias(name), &block
  end
end

#tsort_each_node(&block) ⇒ Object 



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# File 'lib/rbs/environment_walker.rb', line 25

def tsort_each_node(&block)
  env.class_decls.each_key(&block)
  env.interface_decls.each_key(&block)
  env.alias_decls.each_key(&block)
end