1: include "std"; 2: macro val hello = "Hello"; 3: macro val place = "world"; 4: macro fun greet() = hello " " place "!\n"; 5: { 6: macro val hello = "Hi there"; 7: macro val place = "locality"; 8: print (greet()); 9: macro forget place; 10: print (greet()); 11: macro forget; 12: print (greet()); 13: }; 14: 15: print (greet()); 16: 17: