Compiler Error C2180

controlling expression has type 'type'

Remarks

The controlling expression in an if, while, for, or do statement is an expression cast to void. To fix this issue, change the controlling expression to one that produces a bool or a type that can be converted to bool.

Example

The following example generates C2180:

// C2180.c

int main() {
   while ((void)1)   // C2180
      return 1;
   while (1)         // OK
      return 0;
}