LARGE_INTEGER共用体的一个问题里面的两个结构体，一个没有名字，一个带u，为什么这样设计？是不是很多余？里面
LARGE_INTEGER共用体的一个问题
里面的两个结构体，一个没有名字，一个带u，为什么这样设计？是不是很多余？
里面的两个结构体，一个没有名字，一个带u，为什么这样设计？是不是很多余？
[解决办法]
File: "C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\Include\WinNT.h"
470: #if defined(MIDL_PASS)
471: typedef struct _LARGE_INTEGER {
472: #else // MIDL_PASS
473: typedef union _LARGE_INTEGER {
474: struct {
475: DWORD LowPart;
476: LONG HighPart;
477: };
478: struct {
479: DWORD LowPart;
480: LONG HighPart;
481: } u;
482: #endif //MIDL_PASS
483: LONGLONG QuadPart;
484: } LARGE_INTEGER;
MIDL Compiler Errors and Warnings
This section lists MIDL compiler error and warning messages.
An error or warning message sometimes specifies the name of one or more MIDL compiler mode switches. The MIDL compiler accepts an IDL file when you use some mode switches but generates errors for the same file when you do not use mode switches. For example, you can include certain ACF attributes in an IDL file when you use the /app_config switch, but that IDL file will generate an error if you compile without using the /app_config switch.
Command-line errors appear in the following format:
Command line error : MIDLnnnn : <error text>
[<additional error information>]
The additional-error information field provides context-specific information about the error. The information in this field depends on the error message. For example, when an unresolved type-declaration error occurs, the additional-information field displays the name of the type that could not be resolved.
Compile-time warnings appear in the following format:
<FileName>(line#) : warning MIDLnnnn :
<warning text>
[optional context information] :
Compile-time errors appear in the following format:
<FileName>(line#) : error MIDLnnnn :
<error text>
[optional context information] :
Optional context information refers to the context in which the error occurred. The MIDL compiler reports this information to help you quickly find the error in the IDL file. Context information is generated when the MIDL compiler discovers an error during semantic analysis of type and procedure signatures.
System error messages appear in the following format:
<FileName>(line#) : MIDL error 0xnnnn :
"Unexpected internal compiler problem. Try to find a workaround."
The absence of relevant context information is not intended to make your life more difficult. This message is generated by an error that was, quite literally, unexpected. The hexadecimal error number is a Windows NT or Windows 9x system error identifier. You may find additional information regarding your particular error in the WINERROR.H or.NTSTATUS.H files. For more information on working around the conditions that caused this error, see the error text for compiler error MIDL9008.
[解决办法]
MIDL compiler
The Microsoft Interface Definition Library (MIDL) compiler can be used to generate a type library. For information about the MIDL compiler, refer to the Microsoft Interface Definition Language Programmer’s Guide and Reference in the Win32 Software Development Kit (SDK) section of the Microsoft Developer’s Network (MSDN).
