Compiler Warning (level 1) C4545


The new home for Visual Studio documentation is Visual Studio 2017 Documentation on

The latest version of this topic can be found at Compiler Warning (level 1) C4545.

expression before comma evaluates to a function which is missing an argument list

The compiler detected an ill-formed comma expression.

This warning is off by default. For more information, see Compiler Warnings That Are Off by Default.

The following sample generates C4545:

// C4545.cpp  
// compile with: /W1  
#pragma warning (default : 4545)  
void f() { }  
int main()  
   *(&f), 10;   // C4545  
   // try the following line instead  
   // (*(&f))(), 10;