Question

I’m following this guide, and I’m hitting these parts of the code that include the term [this] (Just Ctrl-F it; you’ll see what I mean).

I’m not sure if this is a C++ thing or a C++/CX thing, but, either way, I don’t know what it is.

What is it?

Answer 1

It’s called a “Lambda Closure” and it’s saying that the current instance (this) is to be passed into the lambda body (enabling you to use it’s variables, and call it’s methods).

This page gives a good summary of Lambda Closures:
http://www.cprogramming.com/c++11/c++11-lambda-closures.html

[] Capture nothing (or, a scorched earth strategy?)
[&] Capture any referenced variable by reference
[=] Capture any referenced variable by making a copy
[=, &foo] Capture any referenced variable by making a copy, but capture variable foo by reference
[bar] Capture bar by making a copy; don’t copy anything else
[this] Capture the this pointer of the enclosing class