static inline D cast(U &&o) {
D d;
if (!o) return d;
auto t = get_dtable(o);
d.table_ = t;
if (std::is_reference<U>::value) {
auto c = get_table<concept_copy_construct::Table>(
t->type_info, t, o.table());
if (d.stored_in_heap()) {
d.heap_data() = ::operator new(o.table()->size);
}
c->copy_construct(d.data(), o.data());
} else {
if (d.stored_in_heap()) {
if (o.stored_in_heap()) {
d.heap_data() = o.heap_data();
((S *)&o)->table_ = nullptr;
} else {
d.heap_data() = ::operator new(o.table()->size);
}
}
if (o) {
t->move_construct(d.data(), (void *)o.data());
}
}
return d;
}
void test_string()
{
string default_construct;
string charptr_construct("charptr construct");
string copy_construct(charptr_construct);
const string conststring("const string");
string move_construct_const(conststring);
string normalstring("normal string");
string moveable_string("movable string");
string move_construct_nonconst = std::move(moveable_string);
print(move_construct_nonconst);
string subscript_nonconst("normal string to be subscripted");
const string subscript_const("const string to be subscripted");
print(default_construct);
print(charptr_construct);
print(copy_construct);
print(conststring);
print(move_construct_const);
print(normalstring);
print(move_construct_nonconst);
print(subscript_nonconst);
print(subscript_const);
//test subscripts
auto test_subscript = [](string subscript) {
printf("\ntesting subscript...\n");
printf("%s\n", subscript.c_str());
for (size_t i = 0; i < subscript.length(); ++i)
printf("%c", subscript[i]);
printf("\n");
};
auto test_all_subscript = [&test_subscript](initializer_list<string> list) {
for (string s : list)
test_subscript(s);
};
test_all_subscript({subscript_const, subscript_const});
auto test_assignment = [](string left, string right) {
printf("\ntesting assignment...\n");
printf("left: %s \tright: %s\n", left.c_str(), right.c_str());
left = right;
printf("left: %s \tright: %s\n", left.c_str(), right.c_str());
};
test_assignment(charptr_construct, subscript_const);
string init_list({ "hello", " world", " test" });
print(init_list);
}
