Compiler Warning (level 4) C4204

 

The new home for Visual Studio documentation is Visual Studio 2017 Documentation on docs.microsoft.com.

The latest version of this topic can be found at Compiler Warning (level 4) C4204.

nonstandard extension used : non-constant aggregate initializer

With Microsoft extensions (/Ze), you can initialize aggregate types (arrays, structures, unions, and classes) with values that are not constants.

// C4204.c  
// compile with: /W4  
int func1()  
{  
   return 0;  
}  
struct S1  
{  
   int i;  
};  
  
int main()  
{  
   struct S1 s1 = { func1() };   // C4204  
   return s1.i;  
}  

Such initializations are invalid under ANSI compatibility (/Za).

Show: