noun
defined assignment statement
Computing term for a statement that assigns a value using a user-defined operation or function.
この言語では、利用者定義代入文を使って独自の代入演算子を定義できる。
In this language, you can define custom assignment operators using defined assignment statements.
Compound of 利用者 (user), 定義 (definition), 代入 (assignment), and 文 (statement). A technical term likely coined in Japanese computing contexts.