13eholder/m14-mental-model
m14-mental-model/SKILL.md
C++ Mental Models: Pointer vs Reference, Initialization, Undefined Behavior.
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SKILL.md
- name:
- m14-mental-model
- description:
- C++ Mental Models: Pointer vs Reference, Initialization, Undefined Behavior.
C++ Mental Models
Core Question
What happens in memory?
- Value: Does it own the bytes?
- Reference: Is it an alias?
- Pointer: Is it nullable?
Thinking Prompt
-
Is it a Copy or Reference?
auto x = y(Copy).auto& x = y(Reference).
-
Does it dangle?
- Returning
&localis always wrong.
- Returning
Quick Reference
| Concept | Mental Model |
| --------------- | ---------------------------------- |
| T& | Guaranteed Alias. |
| T* | Nullable Address (Requires check). |
| std::move | Cast to rvalue (Prepare to steal). |
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