potion_str_add    793 core/potion.h  PN potion_str_add(Potion *P, PN, PN, PN);
potion_str_add    439 core/string.c    potion_method(str_vt, "+", potion_str_add, "str=S");
potion_str_add    546 syn/syntax-p5.y arg2-name = s:arg2-sigil i:id - { $$ = potion_str_add(P, 0, s, i) }