# Barton-Nackman trick

> English word · Proper noun

## Definitions
1. A form of restricted template expansion in C++, characterized by an in-class friend function definition appearing in the base class template component of the curiously recurring template pattern.

## Etymology
The technique was introduced by John Barton and Lee Nackman.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/barton-nackman-trick