Method: Puppet::Pops::Types::TypeMismatchDescriber#describe_PCallableType

Defined in:
lib/puppet/pops/types/type_mismatch_describer.rb

#describe_PCallableType(expected, original, actual, path) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/puppet/pops/types/type_mismatch_describer.rb', line 945

def describe_PCallableType(expected, original, actual, path)
  if actual.is_a?(PCallableType)
    # nil param_types means, any other Callable is assignable
    if expected.param_types.nil? && expected.return_type.nil?
      EMPTY_ARRAY
    else
      # NOTE: these tests are made in reverse as it is calling the callable that is constrained
      # (it's lower bound), not its upper bound
      param_errors = describe_argument_tuple(expected.param_types, actual.param_types, path)
      if param_errors.empty?
        this_return_t = expected.return_type || PAnyType::DEFAULT
        that_return_t = actual.return_type || PAnyType::DEFAULT
        if this_return_t.assignable?(that_return_t)
          # names are ignored, they are just information
          # Blocks must be compatible
          this_block_t = expected.block_type || PUndefType::DEFAULT
          that_block_t = actual.block_type || PUndefType::DEFAULT
          if that_block_t.assignable?(this_block_t)
            EMPTY_ARRAY
          else
            [TypeMismatch.new(path + [BlockPathElement.new], this_block_t, that_block_t)]
          end
        else
          [TypeMismatch.new(path + [ReturnTypeElement.new], this_return_t, that_return_t)]
        end
      else
        param_errors
      end
    end
  else
    [TypeMismatch.new(path, original, actual)]
  end
end