-void ConstSubExpr (int (*F) (ExprDesc*), ExprDesc* Expr);
-/* Will evaluate an expression via the given function. If the result is not
- * a constant, a diagnostic will be printed, and the value is replaced by
- * a constant one to make sure there are no internal errors that result
- * from this input error.
- */
-
-void CheckBoolExpr (ExprDesc* lval);
-/* Check if the given expression is a boolean expression, output a diagnostic
- * if not.
- */
-
-void exprhs (unsigned flags, int k, ExprDesc *lval);