idl_quote

Articolo
01/03/2018

The latest version of this topic can be found at idl_quote.

Allows you to use IDL constructs that are not supported in the current version of Visual C++ and have them pass through to the generated .idl file.

Syntax

  
      [ idl_quote(  
   text  
) ]

Parameters

text
The attribute name that you intend the Visual C++ compiler to pass through to the generated .idl file without returning a compiler error.

Remarks

If the idl_quote C++ attribute is used as a stand-alone attribute (with a semicolon after the closing bracket), then text is placed in the merged .idl file as is. If idl_quote is used on a symbol, text is placed within the attribute block for that symbol.

Example

The following code shows how you could specify an unsupported attribute (using in, which is supported) and how to define and use an undefined .idl construct:

// cpp_attr_ref_idl_quote.cpp  
// compile with: /LD  
#include <unknwn.h>  
[module(name="MyLibrary")];  
  
[export]  
struct MYFLOT {  
   int i;  
};  
  
[export]  
struct MYDUB {  
   int i;  
};  
  
[idl_quote("typedef union _S1_TYPE switch (long l1) U1_TYPE { case 1024: \  
struct MYFLOT f1; case 2048: struct MYDUB d2; } S1_TYPE;") ];  
  
typedef struct _S1_TYPE {   
   long l1;   
  
union {   
   MYFLOT f1; MYDUB d2; } U1_TYPE;   
} S1_TYPE;  
  
[uuid("2F5F63F1-16DA-11d2-9E7B-00C04FB926DA"), object]  
__interface IStatic{  
   HRESULT Func1([idl_quote("in")] int i);  
   HRESULT func( S1_TYPE* myStruct );  
};

This code causes MYFLOT and MYDUB and the text entry to be placed in the generated .idl file. The name parameter forces text to be placed before anything that references name in the generated .idl file. The dependencies parameter forces the dependency list definitions to be placed before text in the generated .idl file.

Requirements

Attribute Context

Applies to	Anywhere
Repeatable	No
Required attributes	None
Invalid attributes	None

For more information, see Attribute Contexts.

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