SystemVerilog OOP Mastery · All levels
No Multiple Inheritance (Only Interface-Class Contracts)
C++ can inherit implementation from multiple bases; SystemVerilog cannot. In DV, you combine one extends chain with interface-class contracts and composition helpers.
Overview
C++ can inherit implementation from multiple bases; SystemVerilog cannot. In DV, you combine one extends chain with interface-class contracts and composition helpers.
C++ supports multiple inheritance of implementation, so a derived class can reuse code and data members from more than one concrete base class. That model enables rich mixins but can introduce ambiguity (diamond patterns) and complex method-resolution rules.
In this topic
1. Concept Explained
2. Code Examples
3. SystemVerilog vs C++/Java
4. Pitfalls
5. Exercises
6. Interview QuestionsRead the concept first, study the code examples, compare against C++/Java, then test yourself with the exercises and interview questions.
SystemVerilog versus C++ OOP matrix
SV VS C++ FEATURE MATRIX
+------------------------+-------------------+------------------------+
| capability | SystemVerilog | C++ |
+------------------------+-------------------+------------------------+
| multiple inheritance | no | yes |
| interfaces as classes | interface class | abstract class idiom |
| templates | parameterized cls | templates |
| memory control | GC-like handles | manual/RAII/smart ptr |
| reflection/factory use | common in UVM | framework dependent |
+------------------------+-------------------+------------------------+
SV OOP is tuned for verification productivity over low-level control.