## deparse output as deparsed by -MO=Deparse,-p print(sort(f(0))); # case 1 print((sort f 0)); # case 2 print(sort(&f(0))); # case 3 print((sort f 0)); # case 4 print((sort f 0)); # case 5 print(sort(&f(0))); # case 6 sub f { 1; } - syntax OK