SystemVerilog OOP Mastery · All levels
No Multiple Inheritance: Interface Classes + Composition: Concept Explained
Concept Explained for No Multiple Inheritance: Interface Classes + Composition.
Concept
In short: SystemVerilog has single class inheritance; emulate mixin-style behavior using interface-class contracts plus composed helper objects.
SV intentionally avoids C++-style multiple class inheritance, so you never resolve ambiguous base methods or duplicate base sub-objects. The trade-off is that shared capabilities must be modeled explicitly.
The practical pattern is: one `extends` chain for core identity, multiple `implements` clauses for role contracts, and composition/delegation for reusable implementation. This keeps dependency flow visible and debug-friendly.