message: create_device as default impl
diff: @@ -8,14 +8,12 @@ use ::RawPtr;
  use version::{FunctionPointers, V1_0, InstanceFpV1_0, DeviceFpV1_0};
  use version::{InstanceLoader, DeviceLoader};
  -
  #[derive(Debug)]
  pub enum DeviceError {
  LoadError(Vec<&'static str>),
  VkError(vk::Result),
  }
  -
  #[derive(Clone)]
  pub struct Instance<V: FunctionPointers> {
  handle: vk::Instance,
  @@ -23,6 +21,7 @@ pub struct Instance<V: FunctionPointers> {
  }
  impl InstanceV1_0 for Instance<V1_0> {
  + type Fp = V1_0;
  fn handle(&self) -> vk::Instance {
  self.handle
  }
  @@ -44,15 +43,18 @@ impl<V: FunctionPointers> Instance<V> {
  }
  }
  -impl<V: FunctionPointers> Instance<V> {
  - pub unsafe fn create_device(&self,
  +#[warn(non_camel_case_types)]
  +pub trait InstanceV1_0 {
  + type Fp: FunctionPointers;
  + fn handle(&self) -> vk::Instance;
  + fn fp_v1_0(&self) -> &vk::InstanceFnV1_0;
  + unsafe fn create_device(&self,
  physical_device: vk::PhysicalDevice,
  create_info: &vk::DeviceCreateInfo,
  allocation_callbacks: Option<&vk::AllocationCallbacks>)
  - -> Result<Device<V>, DeviceError> {
  + -> Result<Device<Self::Fp>, DeviceError> {
  let mut device: vk::Device = mem::uninitialized();
  - let err_code = self.instance_fp
  - .fp_v1_0()
  + let err_code = self.fp_v1_0()
  .create_device(physical_device,
  create_info,
  allocation_callbacks.as_raw_ptr(),
  @@ -60,15 +62,11 @@ impl<V: FunctionPointers> Instance<V> {
  if err_code != vk::Result::Success {
  return Err(DeviceError::VkError(err_code));
  }
  - let device_fn = V::DeviceFp::load(self.instance_fp.fp_v1_0(), device).map_err(|err| DeviceError::LoadError(err))?;
  + let device_fn =
  + <<Self as InstanceV1_0>::Fp as FunctionPointers>::DeviceFp::load(self.fp_v1_0(), device).map_err(|err| DeviceError::LoadError(err))?;
  Ok(Device::from_raw(device, device_fn))
  }
  -}
  -#[warn(non_camel_case_types)]
  -pub trait InstanceV1_0 {
  - fn handle(&self) -> vk::Instance;
  - fn fp_v1_0(&self) -> &vk::InstanceFnV1_0;
  fn get_device_proc_addr(&self,
  device: vk::Device,
  p_name: *const vk::c_char)
  @@ -91,6 +89,7 @@ pub trait InstanceV1_0 {
  format_prop
  }
  }
  +
  fn get_physical_device_memory_properties(&self,
  physical_device: vk::PhysicalDevice)
  -> vk::PhysicalDeviceMemoryProperties {
  