Compiler Error C3382

'sizeof' is not supported with /clr:safe

The output file of a /clr:safe compilation is a file that is verifiably type safe, and sizeof is not supported because the return value of the sizeof operator is size_t, whose size varies depending on the operating system.

For more information, see,

• sizeof Operator

• /clr (Common Language Runtime Compilation)

• Common Visual C++ 64-bit Migration Issues

Example

The following sample generates C3382.

// C3382.cpp
// compile with: /clr:safe
int main() {
   sizeof( char );   // C3382
}