RosettaCodeData/Task/Add-a-variable-to-a-class-instance-at-runtime/Pop11/add-a-variable-to-a-class-instance-at-runtime.pop11
Ingy döt Net d066446780 langs a-z
2013-04-10 22:43:41 -07:00

28 lines
852 B
Text

lib objectclass;
define :class foo;
enddefine;
define define_named_method(method, class);
lvars method_str = method >< '';
lvars class_str = class >< '';
lvars method_hash_str = 'hash_' >< length(class_str) >< '_'
>< class_str >< '_' >< length(method_str)
>< '_' >< method_str;
lvars method_hash = consword(method_hash_str);
pop11_compile([
lvars ^method_hash = newassoc([]);
define :method ^method(self : ^class);
^method_hash(self);
enddefine;
define :method updaterof ^method(val, self : ^class);
val -> ^method_hash(self);
enddefine;
]);
enddefine;
define_named_method("met1", "foo");
lvars bar = consfoo();
met1(bar) => ;;; default value -- false
"baz" -> met1(bar);
met1(bar) => ;;; new value