Core · Module 6 · Lesson 5 of 6
The Diamond and Virtual Inheritance
Resolve the diamond ambiguity with virtual inheritance so two paths share one base part, and trace how the most derived type builds that shared base.
By the end you can
- Explain the ambiguity created by a diamond hierarchy
- Use virtual inheritance to share one base part
- Predict construction order for a virtual base
Builds on Abstract Classes and Pure Interfaces.
01 · A question first
A catalog scanner inherits network retry logic through both its barcode path and its RFID path, and both paths inherit from Device. How many Device parts should the scanner hold, and which declaration keeps method calls and construction unambiguous?
Make a guess before you read on.
02 · The idea
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What's inside
- Start with the ambiguity
- How the diamond forms
- Why construction shifts
- Cost, limits, and alternatives
- Mistakes to avoid
- Analogy and a shared identity check
- Where this is used
03 · Practice
Asked in interviews
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