Class: TypedRb::Model::TmSend

Inherits:
Expr show all
Defined in:
lib/typed/model/tm_send.rb

Overview

message send

Instance Attribute Summary collapse

Attributes inherited from Expr

#col, #line, #node, #type

Instance Method Summary collapse

Constructor Details

#initialize(receiver, message, args, node) ⇒ TmSend

Returns a new instance of TmSend.



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# File 'lib/typed/model/tm_send.rb', line 9

def initialize(receiver, message, args, node)
  super(node)
  @receiver = receiver
  @message = message
  @args = args
  @block = nil
end

Instance Attribute Details

#args ⇒ Object

Returns the value of attribute args.



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# File 'lib/typed/model/tm_send.rb', line 8

def args
  @args
end

#block ⇒ Object

Returns the value of attribute block.



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# File 'lib/typed/model/tm_send.rb', line 8

def block
  @block
end

#message ⇒ Object

Returns the value of attribute message.



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# File 'lib/typed/model/tm_send.rb', line 8

def message
  @message
end

#receiver ⇒ Object

Returns the value of attribute receiver.



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# File 'lib/typed/model/tm_send.rb', line 8

def receiver
  @receiver
end

Instance Method Details

#cast?(function_klass_type) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/typed/model/tm_send.rb', line 265

def cast?(function_klass_type)
  function_klass_type == BasicObject && message == :cast
end

#check_application(receiver_type, function_type, context) ⇒ Object 



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# File 'lib/typed/model/tm_send.rb', line 163

def check_application(receiver_type, function_type, context)
  if function_type.is_a?(Types::TyDynamicFunction)
    function_type.to
  else
    if function_type.generic?
      function_type.local_typing_context.parent = Types::TypingContext.type_variables_register
      return_type = function_type.materialize do |materialized_function|
        check_application(receiver_type, materialized_function, context)
      end.to
      return_type.respond_to?(:as_object_type) ? return_type.as_object_type : return_type
    else
      formal_parameters = function_type.from
      parameters_info = function_type.parameters_info
      TypedRb.log(binding, :debug, "Checking function application #{receiver_type}::#{message}( #{parameters_info} )")
      check_args_application(parameters_info, formal_parameters, args, context)
      if @block
        block_type = @block.check_type(context)
        # TODO:
        # Unification is run here
        # Algorithm is failing:
        # G > String,
        # G < E
        # ========
        # G = [String, ?]
        # -----
        # G = [String, E]
        # E = [String, ?]
        block_return_type = if function_type.block_type
                              # materialization and unification will happen in this invocation
                              block_type.compatible?(function_type.block_type, :lt)
                            else
                              block_type.to
                            end
        if block_return_type.to.stack_jump?
          break_type = block_return_type.to.wrapped_type.check_type(context)
          unless break_type.compatible?(function_type.to, :lt)
            error_message = "Incompatible 'break' type, expected #{function_type.to}, found #{break_type}"
            fail error_message, block_return_type.to.node
          end
        elsif block_return_type.to.either?
          max_type = block_return_type.check_type(context, [:return, :break, :normal])
          unless max_type.compatible?(function_type.to, :lt)
            error_message = "Incompatible either max type, expected #{function_type.to}, found #{max_type}"
            fail error_message, block_return_type.to.node
          end
        end
      end
      return_type = function_type.to
      return_type.respond_to?(:as_object_type) ? return_type.as_object_type : return_type
    end
  end
end

#check_args_application(parameters_info, formal_parameters, actual_arguments, context) ⇒ Object 



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# File 'lib/typed/model/tm_send.rb', line 220

def check_args_application(parameters_info, formal_parameters, actual_arguments, context)
  #binding.pry if actual_arguments.size == 1 && actual_arguments.first.class == TypedRb::Model::TmVar && actual_arguments.first.val == "klass" && actual_arguments.first.col == 36
  parameters_info.each_with_index do |(require_info, arg_name), index|
    actual_argument = actual_arguments[index]
    formal_parameter_type = formal_parameters[index]
    if formal_parameter_type.nil? && !require_info == :block
      fail TypeCheckError.new("Error type checking message sent '#{message}': Missing information about argument #{arg_name} in #{receiver}##{message}", node)
    end
    if actual_argument.nil? && require_info != :opt && require_info != :rest && require_info != :block
      fail TypeCheckError.new("Error type checking message sent '#{message}': Missing mandatory argument #{arg_name} in #{receiver}##{message}", node)
    else
      if require_info == :rest
        break if actual_argument.nil? # invocation without any of the optional arguments
        rest_type = formal_parameter_type.type_vars.first
        formal_parameter_type = if rest_type.respond_to?(:bound)
                                  rest_type.bound
                                else
                                  rest_type
                                end
        actual_arguments[index..-1].each do |actual_argument|
          actual_argument_type = actual_argument.check_type(context)
          unless actual_argument_type.compatible?(formal_parameter_type, :lt)
            error_message = "Error type checking message sent '#{message}': #{formal_parameter_type} expected, #{actual_argument_type} found"
            fail TypeCheckError.new(error_message, node)
          end
        end
        break
      else
        unless actual_argument.nil? # opt or block if this is nil
          actual_argument_type = actual_argument.check_type(context)
          fail TypeCheckError.new("Error type checking message sent '#{message}': Missing type information for argument '#{arg_name}'", node) if formal_parameter_type.nil?
          begin
            unless actual_argument_type.compatible?(formal_parameter_type, :lt)
              error_message = "Error type checking message sent '#{message}': #{formal_parameter_type} expected, #{actual_argument_type} found"
              fail TypeCheckError.new(error_message, node)
            end
          rescue Types::UncomparableTypes, ArgumentError
            raise Types::UncomparableTypes.new(actual_argument_type, formal_parameter_type, node)
          end
        end
      end
    end
  end
end

#check_casting(context) ⇒ Object 



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# File 'lib/typed/model/tm_send.rb', line 269

def check_casting(context)
  from_type = args[0].check_type(context)
  to = parse_type_application_arguments([args[1]], context).first
  to_type = to.is_a?(Types::TyObject) ? to.as_object_type : to
  TypedRb.log(binding, :info, "Casting #{from_type} into #{to_type}")
  to_type
end

#check_instantiation(context) ⇒ Object

we received new, but we look for initialize in the class, not the singleton class. we then run the regular application, but we return the class type instead of the return type for the constructor application (should be unit/nil).



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# File 'lib/typed/model/tm_send.rb', line 52

def check_instantiation(context)
  self_type = singleton_object_type(receiver, context).as_object_type
  function_klass_type, function_type = self_type.find_function_type(:initialize, args.size, @block)
  TypedRb.log_dynamic_warning(node, self_type, :initialize) if function_type.dynamic?

  # function application
  @message = :initialize
  begin
    check_application(self_type, function_type, context)
  rescue TypeCheckError => error
    raise error if function_klass_type == self_type.ruby_type
  end
  self_type
end

#check_lambda_application(lambda_type, context) ⇒ Object 



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# File 'lib/typed/model/tm_send.rb', line 216

def check_lambda_application(lambda_type, context)
  lambda_type.check_args_application(args, context).to
end

#check_module_inclusions(self_type, context) ⇒ Object 



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# File 'lib/typed/model/tm_send.rb', line 281

def check_module_inclusions(self_type, context)
  args.map do |arg|
    arg.check_type(context)
  end.each do |module_type|
    if module_type.is_a?(Types::TyExistentialType)
      if module_type.local_typing_context
        module_type.check_inclusion(self_type)
      else
        # TODO: report warning about missing module information
        TypedRb.log(binding, :debug,  "Not type checking module #{module_type.ruby_type} inclusion due to lack of module information")
      end
    else
      error_message = "Error type checking message sent '#{message}': Module type expected for inclusion in #{self_type}, #{module_type} found"
      fail TypeCheckError.new(error_message, node)
    end
  end
  self_type
end

#check_type(context) ⇒ Object 



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# File 'lib/typed/model/tm_send.rb', line 21

def check_type(context)
  @context = context
  TypedRb.log(binding, :debug,  "Type checking message sent: #{message} at line #{node.loc.line}")
  if receiver.nil? && message == :ts
    # ignore, => type annotation
    Types::TyUnit.new(node)
  elsif message == :new && !singleton_object_type(receiver, context).nil? # clean this!
    check_instantiation(context)
  elsif receiver == :self || receiver.nil?
    # self.m(args), m(args), m
    check_type_no_explicit_receiver(context)
  else
    # x.m(args)
    check_type_explicit_receiver(context)
  end
end

#check_type_application_to_generic(generic_type, args) ⇒ Object 



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# File 'lib/typed/model/tm_send.rb', line 159

def check_type_application_to_generic(generic_type, args)
  generic_type.materialize(args)
end

#check_type_explicit_receiver(context) ⇒ Object 



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# File 'lib/typed/model/tm_send.rb', line 85

def check_type_explicit_receiver(context)
  if receiver_type.is_a?(Types::Polymorphism::TypeVariable)
    # Existential type (Module) if receiver_type is self
    # TODO: what can we do if this is the inclusion of a module?
    arg_types = args.map { |arg| arg.check_type(context) }
    receiver_type.add_message_constraint(message, arg_types)
  elsif receiver_type.is_a?(Types::TyGenericSingletonObject) && (message == :call)
    # Application of types accept a type class or a string with a type description
    arg_types = parse_type_application_arguments(args, context)
    check_type_application_to_generic(receiver_type, arg_types)
  elsif receiver_type.is_a?(Types::TyFunction) && (message == :[] || message == :call)
    check_lambda_application(receiver_type, context)
  else
    function_klass_type, function_type = receiver_type.find_function_type(message, args.size, @block)
    TypedRb.log_dynamic_warning(node, receiver_type, message) if function_type.dynamic?
    # begin
    if function_type.nil?
      error_message = "Error type checking message sent '#{message}': Type information for #{receiver_type}:#{message} not found."
      fail TypeCheckError.new(error_message, node)
    elsif cast?(function_klass_type)
      check_casting(context)
    elsif module_include_implementation?(function_klass_type)
      check_module_inclusions(receiver_type, context)
    else
      # function application
      check_application(receiver_type, function_type, context)
    end
    # rescue TypeCheckError => error
    #  if function_klass_type != receiver_type.ruby_type
    #    Types::TyDynamic.new(Object, node)
    #  else
    #    raise error
    #  end
    # end
  end
end

#check_type_no_explicit_receiver(context) ⇒ Object 



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# File 'lib/typed/model/tm_send.rb', line 67

def check_type_no_explicit_receiver(context)
  if message == :yield
    check_yield_application(context)
  else
    @receiver_type = context.get_type_for(:self) # check message in self type -> application
    check_type_explicit_receiver(context)
  end
end

#check_yield_application(context) ⇒ Object 



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# File 'lib/typed/model/tm_send.rb', line 76

def check_yield_application(context)
  yield_abs_type = context.get_type_for(:yield)
  if yield_abs_type
    check_lambda_application(yield_abs_type, context)
  else
    fail TypeCheckError.new("Error type checking message sent '#{message}': Cannot find yield function defined in typing context", node)
  end
end

#module_include_implementation?(function_klass_type) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/typed/model/tm_send.rb', line 277

def module_include_implementation?(function_klass_type)
  function_klass_type == Module && message == :include
end

#parse_type_application_argument(type) ⇒ Object 



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# File 'lib/typed/model/tm_send.rb', line 145

def parse_type_application_argument(type)
  # TODO: do this recursively in the case of nested generic type
  # TODO: do we need it at all?
  klass = if type.is_a?(Hash) && type[:kind] == :generic_type
            Class.for_name(type[:type])
          end
  Runtime::TypeParser.parse(type, klass)
end

#parse_type_application_arguments(arguments, context) ⇒ Object 



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# File 'lib/typed/model/tm_send.rb', line 122

def parse_type_application_arguments(arguments, context)
  arguments.map do |argument|
    if argument.is_a?(Model::TmString)
      type_var_signature = argument.node.children.first
      maybe_generic_method_var = Types::TypingContext.vars_info(:method)[type_var_signature]
      maybe_generic_class_var = Types::TypingContext.vars_info(:class)[type_var_signature]
      maybe_generic_module_var = Types::TypingContext.vars_info(:module)[type_var_signature]
      if maybe_generic_method_var || maybe_generic_class_var || maybe_generic_module_var
        maybe_generic_method_var || maybe_generic_class_var || maybe_generic_module_var
      else
        parsed_types = TypeSignature::Parser.parse(type_var_signature)
        if parsed_types.is_a?(Array)
          parsed_types.map { |parsed_type| parse_type_application_argument(parsed_type) }
        else
          parse_type_application_argument(parsed_types)
        end
      end
    else
      argument.check_type(context)
    end
  end.flatten
end

#receiver_type ⇒ Object 



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# File 'lib/typed/model/tm_send.rb', line 300

def receiver_type
  @receiver_type ||= receiver.check_type(@context)
end

#singleton_object_type(receiver, context) ⇒ Object 



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# File 'lib/typed/model/tm_send.rb', line 38

def singleton_object_type(receiver, context)
  parsed_receiver_type = if receiver.nil? || receiver == :self
                           context.get_type_for(:self)
                         else
                           receiver_type
                         end
  return parsed_receiver_type if parsed_receiver_type.is_a?(Types::TySingletonObject)
end

#type_application_counter ⇒ Object 



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# File 'lib/typed/model/tm_send.rb', line 154

def type_application_counter
  @type_application_counter ||= 0
  @type_application_counter += 1
end

#with_block(block) ⇒ Object 



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# File 'lib/typed/model/tm_send.rb', line 17

def with_block(block)
  @block = block
end