Module: Autotype::NativeBridge

Defined in:
lib/autotype/native_bridge.rb

Class Method Summary collapse

Class Method Details

.apply_result!(inferencer, result) ⇒ Object 



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# File 'lib/autotype/native_bridge.rb', line 91

def apply_result!(inferencer, result)
  result = result.transform_keys(&:to_s) if result.is_a?(Hash)
  var_map = {}
  inferencer.instance_variable_get(:@methods).each do |method|
    method.capabilities.each do |capability|
      [capability.receiver, capability.result, *capability.arguments].each do |node|
        var_map[node.object_id] = node if node.is_a?(Autotype::TypeVariable)
      end
    end
    method.parameters.each { |parameter| var_map[parameter.type.object_id] = parameter.type if parameter.type.is_a?(Autotype::TypeVariable) }
    method.ivars.each_value { |type| var_map[type.object_id] = type if type.is_a?(Autotype::TypeVariable) }
  end

  subs = inferencer.instance_variable_get(:@substitutions)
  result.fetch("bindings").each do |object_id, type_hash|
    variable = var_map[object_id.to_i]
    next unless variable

    subs[variable] = import_type(type_hash)
  end
end

.enabled? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/autotype/native_bridge.rb', line 7

def enabled?
  ENV["AUTOTYPE_NATIVE"] == "1" && native_available?
end

.export_graph(inferencer) ⇒ Object 



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# File 'lib/autotype/native_bridge.rb', line 46

def export_graph(inferencer)
  resolve = inferencer.method(:resolve)
  var_objects = {}
  capabilities = []

  inferencer.instance_variable_get(:@methods).each do |method|
    method.capabilities.each do |capability|
      next if capability.arguments.any? { |argument| argument.is_a?(Autotype::Function) }

      args = capability.arguments.reject { |argument| argument.is_a?(Autotype::Function) }
      result = capability.result
      next unless result.is_a?(Autotype::TypeVariable)

      var_objects[result.object_id] = result
      receiver = capability.receiver
      var_objects[receiver.object_id] = receiver if receiver.is_a?(Autotype::TypeVariable)

      args.each do |argument|
        var_objects[argument.object_id] = argument if argument.is_a?(Autotype::TypeVariable)
      end

      capabilities << {
        "message" => capability.message.to_s,
        "receiver" => export_type(receiver),
        "result" => result.object_id,
        "args" => args.map { export_type(_1) },
        "line" => capability.line
      }
    end
  end

  bindings = inferencer.instance_variable_get(:@substitutions).each_with_object({}) do |(variable, type), hash|
    resolved = resolve.call(type)
    next if resolved.is_a?(Autotype::TypeVariable)

    hash[variable.object_id] = export_type(resolved)
  end

  {
    "capabilities" => capabilities,
    "bindings" => bindings,
    "var_count" => var_objects.size
  }
end

.export_type(type) ⇒ Object 



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# File 'lib/autotype/native_bridge.rb', line 18

def export_type(type)
  case type
  when Autotype::Named
    { "k" => "named", "name" => type.name }
  when Autotype::Generic
    { "k" => "generic", "name" => type.name, "args" => type.arguments.map { export_type(_1) } }
  when Autotype::Union
    { "k" => "union", "members" => type.members.map { export_type(_1) } }
  when Autotype::TypeVariable
    { "k" => "var", "id" => type.object_id, "hint" => type.hint.to_s }
  else
    { "k" => "named", "name" => "Object" }
  end
end

.import_type(hash) ⇒ Object 



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# File 'lib/autotype/native_bridge.rb', line 33

def import_type(hash)
  entry = hash.transform_keys(&:to_s)
  case entry["k"]
  when "named" then Autotype::Named.new(entry["name"])
  when "generic"
    Autotype::Generic.new(entry["name"], entry["args"].map { import_type(_1) })
  when "union"
    Autotype::Union.new(entry["members"].map { import_type(_1) })
  else
    Autotype::Named.new("Object")
  end
end

.native_available? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/autotype/native_bridge.rb', line 11

def native_available?
  require_relative "native"
  AutotypeNative.available?
rescue LoadError, StandardError
  false
end

.prime!(inferencer) ⇒ Object 



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# File 'lib/autotype/native_bridge.rb', line 113

def prime!(inferencer)
  native_available?
  graph = export_graph(inferencer)
  result = AutotypeNative.solve_graph(graph)
  apply_result!(inferencer, result)
  result
end