/* Foreign C declarations whose names collide with sx's reserved type spellings.
   The `#import c` exemption must accept these generated names unedited, both as
   parameter names (`s1`, `s2`) and as a FUNCTION name (`s2`) — and a foreign
   reserved-name function must be bare-callable (issue 0089). */
int ffi_pick(int s1, int s2, int which);
int ffi_sum(int s1, int s2);
int s2(int u8);