GGUI::NodeSparse class

NodeSparse<T>: a value for the few nodes that have one.

A node without a value costs four bytes. Values live in a chunked pool and never move while their node owns them.

Public functions

auto At(NodeIndex index) -> T&: The node's value, made a default T if it has none.
auto Find(NodeIndex index) const -> const T*: The node's value; null if it has none.
auto Find(NodeIndex index) -> T*: The same, to change it.
auto Get(NodeIndex index) const -> const T&: A default T if the node has none. Does not create one.
void Remove(NodeIndex index): Take the node's value away, resetting it to a default T.
auto Count() const -> uint32_t: How many nodes have a value.
auto Bytes() const -> size_t: Memory held, excluding anything the values own.