noun
forward declaration
In programming, a declaration of an identifier before its full definition, used to allow mutual recursion or to organize code.
C++では、前方宣言を使ってクラスの相互参照を実現できる。
In C++, you can achieve mutual references between classes using forward declarations.
Compound of 前方 (forward) and 宣言 (declaration), a direct translation of the English computing term.