Function to update key

[Olaf van der Spek <olafvdspek@…>]

Sometimes the key of a node has to be updated. Could you add a function for this?

void update_key(iterator, key_type);

It allows an alloc / dealloc pair to be avoided and it allows for simpler (client) code.

[Daniel James]

The C++17 way to do this is to extract the node, change the key, and insert it. I'll be implementing that in a future version. Something like:

auto n = x.extract(it);
n.key() = 100;
x.insert(n);