错误C2678：二进制'='：找不到运算符？ [英] error C2678: binary '=': no operator found?

问题描述

我收到以下错误：

错误C2678：binary'='：找不到运算符，它接受类型为'const xe :: kernel的左操作数： ：shim :: ParamBase< uint32_t>'

error C2678: binary '=': no operator found which takes a left-hand operand of type 'const xe::kernel::shim::ParamBase<uint32_t>'

现在我正在更改代码：

SHIM_CALL XamUserAreUsersFriends_shim(PPCContext* ppc_context,

                                      KernelState* kernel_state) {

  uint32_t user_index = SHIM_GET_ARG_32(0);

  uint32_t unk1 = SHIM_GET_ARG_32(1);

  uint32_t unk2 = SHIM_GET_ARG_32(2);

  uint32_t out_value_ptr = SHIM_GET_ARG_32(3);

  uint32_t overlapped_ptr = SHIM_GET_ARG_32(4);



  XELOGD("XamUserAreUsersFriends(%d, %.8X, %.8X, %.8X, %.8X)", user_index, unk1,

         unk2, out_value_ptr, overlapped_ptr);



  if (user_index == 255) {

    user_index = 0;

  }



  SHIM_SET_MEM_32(out_value_ptr, 0);



  if (user_index) {

    // Only support user 0.

    SHIM_SET_RETURN_32(X_ERROR_NOT_LOGGED_ON);

    return;

  }



  X_RESULT result = X_ERROR_SUCCESS;



  const auto& user_profile = kernel_state->user_profile();

  if (user_profile->signin_state() == 0) {

    result = X_ERROR_NOT_LOGGED_ON;

  }



  // No friends!

  SHIM_SET_MEM_32(out_value_ptr, 0);



  if (overlapped_ptr) {

    kernel_state->CompleteOverlappedImmediate(overlapped_ptr, result);

    SHIM_SET_RETURN_32(X_ERROR_IO_PENDING);

  } else {

    SHIM_SET_RETURN_32(result);

  }

}

对此：

dword_result_t XamUserAreUsersFriends(dword_t user_index, unknown_t unk1, unknown_t unk2, lpvoid_t out_value_ptr, pointer_t<XAM_OVERLAPPED> overlapped_ptr) {
	if (user_index == 255) {
		user_index = 0;
	}

	*out_value_ptr = 0;

	if (user_index) {
		// Only support user 0.
		return X_ERROR_NOT_LOGGED_ON;
	}

	X_RESULT result = X_ERROR_SUCCESS;

	const auto& user_profile = kernel_state()->user_profile();
	if (user_profile->signin_state() == 0) {
		result = X_ERROR_NOT_LOGGED_ON;
	}

	// No friends!
	*out_value_ptr = 0;

	if (overlapped_ptr) {
		kernel_state()->CompleteOverlappedImmediate(overlapped_ptr, result);
		return X_ERROR_IO_PENDING;
	}
	else {
		return result;
	}
}
DECLARE_XAM_EXPORT(XamUserAreUsersFriends, ExportTag::kImplemented);

根据此参考：

• 使用 int_t =
  const shim :: ParamBase < int32_t > & ;
< li style ="font-weight：normal; vertical-align：top">

• using int_t = const shim::ParamBase<int32_t>&;

使用 word_t =
const shim :: ParamBase < uint16_t > & ;

using word_t = const shim::ParamBase<uint16_t>&;

推荐答案

6月15日/ 2017 2:39 PM，drillsar写道：

On 6/15/2017 2:39 PM, drillsar wrote:

我收到以下错误：
$
错误C2678：binary'='：没有运算符发现哪个采用类型'const xe :: kernel :: shim :: paramBase< uint32_t>'的左手操作数'

I get the following error:
error C2678: binary '=': no operator found which takes a left-hand operand of type 'const xe::kernel::shim::ParamBase<uint32_t>'

using dword_t =const shim::ParamBase<uint32_t>&;
dword_result_t XamUserAreUsersFriends(dword_t user_index, unknown_t unk1, unknown_t unk2, lpvoid_t out_value_ptr, pointer_t<XAM_OVERLAPPED> overlapped_ptr) {
    if (user_index == 255) {
        user_index = 0;
    }

user_index的类型为const shim :: ParamBase< uint32_t>& 。它是常量，但您正在尝试修改它。因此错误。

user_index is of type const shim::ParamBase<uint32_t>& . It's const, but you are trying to modify it. Hence the error.

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