Class: RBS::Prototype::Runtime

Inherits:
Object
  • Object
show all
Defined in:
lib/rbs/prototype/runtime.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(patterns:, env:, merge:, owners_included: []) ⇒ Runtime

Returns a new instance of Runtime.



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# File 'lib/rbs/prototype/runtime.rb', line 9

def initialize(patterns:, env:, merge:, owners_included: [])
  @patterns = patterns
  @decls = nil
  @env = env
  @merge = merge
  @owners_included = owners_included.map do |name|
    Object.const_get(name)
  end
end

Instance Attribute Details

#env ⇒ Object (readonly)

Returns the value of attribute env.



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# File 'lib/rbs/prototype/runtime.rb', line 5

def env
  @env
end

#merge ⇒ Object (readonly)

Returns the value of attribute merge.



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# File 'lib/rbs/prototype/runtime.rb', line 6

def merge
  @merge
end

#owners_included ⇒ Object (readonly)

Returns the value of attribute owners_included.



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# File 'lib/rbs/prototype/runtime.rb', line 7

def owners_included
  @owners_included
end

#patterns ⇒ Object (readonly)

Returns the value of attribute patterns.



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# File 'lib/rbs/prototype/runtime.rb', line 4

def patterns
  @patterns
end

Instance Method Details

#builder ⇒ Object 



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# File 'lib/rbs/prototype/runtime.rb', line 31

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

#const_name(const) ⇒ Object 



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# File 'lib/rbs/prototype/runtime.rb', line 437

def const_name(const)
  @module_name_method ||= Module.instance_method(:name)
  @module_name_method.bind(const).call
end

#decls ⇒ Object 



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# File 'lib/rbs/prototype/runtime.rb', line 39

def decls
  unless @decls
    @decls = []
    ObjectSpace.each_object(Module).select {|mod| target?(mod) }.sort_by{|mod| const_name(mod) }.each do |mod|
      case mod
      when Class
        generate_class mod
      when Module
        generate_module mod
      end
    end
  end
  @decls
end

#each_included_module(type_name, mod) ⇒ Object 



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# File 'lib/rbs/prototype/runtime.rb', line 64

def each_included_module(type_name, mod)
  supers = Set[]

  mod.included_modules.each do |mix|
    supers.merge(mix.included_modules)
  end

  if mod.is_a?(Class)
    mod.superclass.included_modules.each do |mix|
      supers << mix
      supers.merge(mix.included_modules)
    end
  end

  mod.included_modules.each do |mix|
    unless supers.include?(mix)
      unless const_name(mix)
        RBS.logger.warn("Skipping anonymous module #{mix} included in #{mod}")
      else
        module_name = module_full_name = to_type_name(const_name(mix))
        if module_full_name.namespace == type_name.namespace
          module_name = TypeName.new(name: module_full_name.name, namespace: Namespace.empty)
        end

        yield module_name, module_full_name, mix
      end
    end
  end
end

#generate_class(mod) ⇒ Object 



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# File 'lib/rbs/prototype/runtime.rb', line 336

def generate_class(mod)
  type_name = to_type_name(const_name(mod))
  super_class = if mod.superclass == ::Object
                  nil
                elsif const_name(mod.superclass).nil?
                  RBS.logger.warn("Skipping anonymous superclass #{mod.superclass} of #{mod}")
                  nil
                else
                  super_name = to_type_name(const_name(mod.superclass))
                  super_args = type_args(super_name)
                  AST::Declarations::Class::Super.new(name: super_name, args: super_args, location: nil)
                end

  decl = AST::Declarations::Class.new(
    name: type_name,
    type_params: AST::Declarations::ModuleTypeParams.empty,
    super_class: super_class,
    members: [],
    annotations: [],
    location: nil,
    comment: nil
  )

  each_included_module(type_name, mod) do |module_name, module_full_name, _|
    args = type_args(module_full_name)
    decl.members << AST::Members::Include.new(
      name: module_name,
      args: args,
      location: nil,
      comment: nil,
      annotations: []
    )
  end

  each_included_module(type_name, mod.singleton_class) do |module_name, module_full_name ,_|
    args = type_args(module_full_name)
    decl.members << AST::Members::Extend.new(
      name: module_name,
      args: args,
      location: nil,
      comment: nil,
      annotations: []
    )
  end

  generate_methods(mod, type_name, decl.members)

  @decls << decl

  generate_constants mod
end

#generate_constants(mod) ⇒ Object 



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# File 'lib/rbs/prototype/runtime.rb', line 303

def generate_constants(mod)
  mod.constants(false).sort.each do |name|
    value = mod.const_get(name)

    next if value.is_a?(Class) || value.is_a?(Module)
    unless value.class.name
      RBS.logger.warn("Skipping constant #{name} #{value} of #{mod} as an instance of anonymous class")
      next
    end

    type = case value
           when true, false
             Types::Bases::Bool.new(location: nil)
           when nil
             Types::Optional.new(
               type: Types::Bases::Any.new(location: nil),
               location: nil
             )
           else
             value_type_name = to_type_name(const_name(value.class))
             args = type_args(value_type_name)
             Types::ClassInstance.new(name: value_type_name, args: args, location: nil)
           end

    @decls << AST::Declarations::Constant.new(
      name: "#{const_name(mod)}::#{name}",
      type: type,
      location: nil,
      comment: nil
    )
  end
end

#generate_methods(mod, module_name, members) ⇒ Object 



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# File 'lib/rbs/prototype/runtime.rb', line 204

def generate_methods(mod, module_name, members)
  mod.singleton_methods.select {|name| target_method?(mod, singleton: name) }.sort.each do |name|
    method = mod.singleton_class.instance_method(name)

    if method.name == method.original_name
      merge_rbs(module_name, members, singleton: name) do
        RBS.logger.info "missing #{module_name}.#{name} #{method.source_location}"

        members << AST::Members::MethodDefinition.new(
          name: method.name,
          types: [method_type(method)],
          kind: :singleton,
          location: nil,
          comment: nil,
          annotations: [],
          overload: false
        )
      end
    else
      members << AST::Members::Alias.new(
        new_name: method.name,
        old_name: method.original_name,
        kind: :singleton,
        location: nil,
        comment: nil,
        annotations: [],
        )
    end
  end

  public_instance_methods = mod.public_instance_methods.select {|name| target_method?(mod, instance: name) }
  unless public_instance_methods.empty?
    members << AST::Members::Public.new(location: nil)

    public_instance_methods.sort.each do |name|
      method = mod.instance_method(name)

      if method.name == method.original_name
        merge_rbs(module_name, members, instance: name) do
          RBS.logger.info "missing #{module_name}##{name} #{method.source_location}"

          members << AST::Members::MethodDefinition.new(
            name: method.name,
            types: [method_type(method)],
            kind: :instance,
            location: nil,
            comment: nil,
            annotations: [],
            overload: false
          )
        end
      else
        members << AST::Members::Alias.new(
          new_name: method.name,
          old_name: method.original_name,
          kind: :instance,
          location: nil,
          comment: nil,
          annotations: [],
          )
      end
    end
  end

  private_instance_methods = mod.private_instance_methods.select {|name| target_method?(mod, instance: name) }
  unless private_instance_methods.empty?
    members << AST::Members::Private.new(location: nil)

    private_instance_methods.sort.each do |name|
      method = mod.instance_method(name)

      if method.name == method.original_name
        merge_rbs(module_name, members, instance: name) do
          RBS.logger.info "missing #{module_name}##{name} #{method.source_location}"

          members << AST::Members::MethodDefinition.new(
            name: method.name,
            types: [method_type(method)],
            kind: :instance,
            location: nil,
            comment: nil,
            annotations: [],
            overload: false
          )
        end
      else
        members << AST::Members::Alias.new(
          new_name: method.name,
          old_name: method.original_name,
          kind: :instance,
          location: nil,
          comment: nil,
          annotations: [],
          )
      end
    end
  end
end

#generate_module(mod) ⇒ Object 



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# File 'lib/rbs/prototype/runtime.rb', line 388

def generate_module(mod)
  name = const_name(mod)

  unless name
    RBS.logger.warn("Skipping anonymous module #{mod}")
    return
  end

  type_name = to_type_name(name)

  decl = AST::Declarations::Module.new(
    name: type_name,
    type_params: AST::Declarations::ModuleTypeParams.empty,
    self_types: [],
    members: [],
    annotations: [],
    location: nil,
    comment: nil
  )

  each_included_module(type_name, mod) do |module_name, module_full_name, _|
    args = type_args(module_full_name)
    decl.members << AST::Members::Include.new(
      name: module_name,
      args: args,
      location: nil,
      comment: nil,
      annotations: []
    )
  end

  each_included_module(type_name, mod.singleton_class) do |module_name, module_full_name, _|
    args = type_args(module_full_name)
    decl.members << AST::Members::Extend.new(
      name: module_name,
      args: args,
      location: nil,
      comment: nil,
      annotations: []
    )
  end

  generate_methods(mod, type_name, decl.members)

  @decls << decl

  generate_constants mod
end

#merge_rbs(module_name, members, instance: nil, singleton: nil) ⇒ Object 



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# File 'lib/rbs/prototype/runtime.rb', line 153

def merge_rbs(module_name, members, instance: nil, singleton: nil)
  if merge
    if env.class_decls[module_name.absolute!]
      case
      when instance
        method = builder.build_instance(module_name.absolute!).methods[instance]
        method_name = instance
        kind = :instance
      when singleton
        method = builder.build_singleton(module_name.absolute!).methods[singleton]
        method_name = singleton
        kind = :singleton
      end

      if method
        members << AST::Members::MethodDefinition.new(
          name: method_name,
          types: method.method_types.map {|type|
            type.update.tap do |ty|
              def ty.to_s
                location.source
              end
            end
          },
          kind: kind,
          location: nil,
          comment: method.comments[0],
          annotations: method.annotations,
          overload: false
        )
        return
      end
    end

    yield
  else
    yield
  end
end

#method_type(method) ⇒ Object 



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# File 'lib/rbs/prototype/runtime.rb', line 94

def method_type(method)
  untyped = Types::Bases::Any.new(location: nil)

  required_positionals = []
  optional_positionals = []
  rest = nil
  trailing_positionals = []
  required_keywords = {}
  optional_keywords = {}
  rest_keywords = nil

  requireds = required_positionals

  block = nil

  method.parameters.each do |kind, name|
    case kind
    when :req
      requireds << Types::Function::Param.new(name: name, type: untyped)
    when :opt
      requireds = trailing_positionals
      optional_positionals << Types::Function::Param.new(name: name, type: untyped)
    when :rest
      requireds = trailing_positionals
      name = nil if name == :* # For `def f(...) end` syntax
      rest = Types::Function::Param.new(name: name, type: untyped)
    when :keyreq
      required_keywords[name] = Types::Function::Param.new(name: nil, type: untyped)
    when :key
      optional_keywords[name] = Types::Function::Param.new(name: nil, type: untyped)
    when :keyrest
      rest_keywords = Types::Function::Param.new(name: nil, type: untyped)
    when :block
      block = Types::Block.new(
        type: Types::Function.empty(untyped).update(rest_positionals: Types::Function::Param.new(name: nil, type: untyped)),
        required: true
      )
    end
  end

  method_type = Types::Function.new(
    required_positionals: required_positionals,
    optional_positionals: optional_positionals,
    rest_positionals: rest,
    trailing_positionals: trailing_positionals,
    required_keywords: required_keywords,
    optional_keywords: optional_keywords,
    rest_keywords: rest_keywords,
    return_type: untyped
  )

  MethodType.new(
    location: nil,
    type_params: [],
    type: method_type,
    block: block
  )
end

#parse(file) ⇒ Object 



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# File 'lib/rbs/prototype/runtime.rb', line 35

def parse(file)
  require file
end

#target?(const) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rbs/prototype/runtime.rb', line 19

def target?(const)
  name = const_name(const)

  patterns.any? do |pattern|
    if pattern.end_with?("*")
      (name || "").start_with?(pattern.chop)
    else
      name == pattern
    end
  end
end

#target_method?(mod, instance: nil, singleton: nil) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rbs/prototype/runtime.rb', line 193

def target_method?(mod, instance: nil, singleton: nil)
  case
  when instance
    method = mod.instance_method(instance)
    method.owner == mod || owners_included.any? {|m| method.owner == m }
  when singleton
    method = mod.singleton_class.instance_method(singleton)
    method.owner == mod.singleton_class || owners_included.any? {|m| method.owner == m.singleton_class }
  end
end

#to_type_name(name) ⇒ Object 



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# File 'lib/rbs/prototype/runtime.rb', line 54

def to_type_name(name)
  *prefix, last = name.split(/::/)

  if prefix.empty?
    TypeName.new(name: last.to_sym, namespace: Namespace.empty)
  else
    TypeName.new(name: last.to_sym, namespace: Namespace.parse(prefix.join("::")))
  end
end

#type_args(type_name) ⇒ Object 



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# File 'lib/rbs/prototype/runtime.rb', line 442

def type_args(type_name)
  if class_decl = env.class_decls[type_name.absolute!]
    class_decl.type_params.size.times.map { :untyped }
  else
    []
  end
end