Understanding $cast in System Verilog

 $cast – What Will Happen Here?

💡 $cast in SystemVerilog : Looks simple, often misunderstood and forms the base for polymorphism, UVM base libraries and abstract Tb design

Below are 4 common ways engineers use base and derived class handles in UVM Tb.

❓ Can you predict what will happen in each case?
❓ Which threads will compile? Which will fail? Which ones could cause bugs if misunderstood?
These are subtle, real-world details that power polymorphism in UVM.

💬 Drop your answers in the comments !



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