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kraken/stdlib/tree.krak

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import mem
import vec
import io:*
import str:*
obj tree<T> (Object) {
var data: T
var parent: *tree<T>
var children: vec::vec<*tree<T>>
fun construct(dataIn: ref T): *tree<T> {
mem::maybe_copy_construct(&data, &dataIn)
parent = mem::null<tree<T>>()
children.construct()
return this
}
fun construct(dataIn: ref T, c: ref vec::vec<*tree<T>>): *tree<T> {
mem::maybe_copy_construct(&data, &dataIn)
parent = mem::null<tree<T>>()
children.copy_construct(&c)
children.for_each(fun(i: *tree<T>) {
i->parent = this
})
return this
}
// Some of these don't really make much sense considering this tree is all about
// heap allocated pointers. Best to have it for saftey, though
fun copy_construct(old: *tree<T>) {
mem::maybe_copy_construct(&data, &old->data)
parent = old->parent
children.copy_construct(&old->children)
}
// ditto
fun operator=(other: tree<T>):void {
destruct()
copy_construct(&other)
}
fun operator==<U>(other: ref tree<U>):bool {
return data == other.data
}
fun destruct() {
mem::maybe_destruct(&data)
children.destruct()
}
fun add_child(c: *tree<T>) {
children.add(c)
c->parent = this
}
fun add_children(c: vec::vec<*tree<T>>) {
for (var i = 0; i < c.size; i++;) {
children.add(c[i])
c[i]->parent = this
}
}
fun set_child(i: int, c: *tree<T>) {
children[i] = c
c->parent = this
}
fun replace_child(old_c: *tree<T>, new_c: *tree<T>) {
children[children.find(old_c)] = new_c
new_c->parent = this
}
fun remove_child(old_c: *tree<T>) {
children.remove(children.find(old_c))
}
fun clone(): *tree<T> {
return mem::new<tree<T>>()->construct(data, children.map(fun(c: *tree<T>): *tree<T> return c->clone();))
}
fun clone(f: fun(ref T): T): *tree<T> {
return mem::new<tree<T>>()->construct(f(data), children.map(fun(c: *tree<T>): *tree<T> return c->clone(f);))
}
}