precedence-aware expression emission only inserts parentheses when the
child binds more loosely than the parent expects.

<<<

main = fun () {
    var a int = 1 + 2 * 3
    var b int = (1 + 2) * 3
    var c int = 10 - 4 - 1
    var d int = 10 - (4 - 1)
    var e int = -1 + 2
    var f bool = a == b && c != 0 || d > 0
}

>>>

#include "core.c"
void catskill_main(void);
void catskill_main(void) {
    integer a = 1 + 2 * 3;
    integer b = (1 + 2) * 3;
    integer c = 10 - 4 - 1;
    integer d = 10 - (4 - 1);
    integer e = -1 + 2;
    bool f = a == b && c != 0 || d > 0;
}
#include "runtime.c"