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name_or_number: @union type = {
name: std::string;
num : i32;
}
name_or_other: @union <T:type> type
= {
name : std::string;
other : T;
to_string: (this) -> std::string = {
if is_name() { return name(); }
else if is_other() { return other() as std::string; }
else { return "invalid value"; }
}
}
print_name: (non: name_or_number) = {
if non.is_name() {
std::cout << non.name() << "\n";
}
else {
std::cout << "(not a name)\n";
}
}
main: () = {
x: name_or_number = ();
std::cout << "sizeof(x) is (sizeof(x))$\n";
x.print_name();
x.set_name( "xyzzy", 3 as u8 );
x.print_name();
{
val: name_or_other<int> = ();
val.set_other(42);
std::cout << val.to_string();
}
}
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