Class Design, Operator Overloading, and Custom Iterators
Engineer expressive, idiomatic C++ classes: arithmetic and comparison operators, subscript and dereference semantics, explicit conversions, and standard iterator contracts.
Class fundamentals and references
Expertise in symmetric operator overloading, const correctness for operator[], and modern C++20 spaceship comparisons.
Read in order, or jump to what you need.
Every lesson builds on the one before it. Open any lesson to read the explanation, run the examples, and try the practice challenges.
- 05.01Operator Overloading: Member vs Non-Member and Arithmetic Idioms4 min
Master operator overloading: symmetric binary arithmetic operators (+, -, *, /), compound assignments (+=, -=), and modern C++20 three-way comparison (spaceship operator <=>).
- 05.02Indexing and Indirection: operator[], operator->, and operator*4 min
Implement container indexing and pointer wrapper abstractions: const and non-const operator[], smart pointer indirection (-> and *), and proxy objects.
- 05.03Type Conversion Operators, the 'explicit' Keyword, and Safe Bool4 min
Prevent insidious implicit conversion bugs using the explicit keyword on single-argument constructors and user-defined conversion operators (explicit operator bool).
- 05.04Custom Iterator Contracts, Range-Based For Loops, and STL Compatibility4 min
Implement custom STL-compliant forward and random-access iterators: iterator traits, begin()/end() contracts, pointer arithmetic operators, and range-based for loops.
Ready to move on?
Overload arithmetic and stream operators and expose STL-compliant iterator interfaces.
Open the module self-check