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operator overloading
Learn operator overloading in D with a construct-specific explanation, unique example, engineering boundary, and mastery check.
operator overloading is a focused D topic inside OOP. This lesson explains the construct itself, the state or value it operates on, and the observable result it produces.
Read the example as a small executable experiment. Identify the exact syntax that belongs to operator overloading, then change one input and predict the result before running it.
Topic-specific example
struct Vec{int x; Vec opBinary(string op)(Vec r) if(op=="+"){return Vec(x+r.x);} }
operator overloading has rules that are easy to miss when the example is copied mechanically. Check the feature-specific boundary shown by this construct: scope, mutability, evaluation order, type constraints, lifetime, error behavior, compile-time restrictions, or resource cleanup where applicable.