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Understanding Deducing This (Explicit Object Parameters) in C++23 [Part 4]

ZeroOverhead
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1y ago · Jun 7, 2025 8:35 AM
#1
C++23 introduces Explicit Object Parameters (colloquially "Deducing This"). It allows passing the this pointer as the first explicit parameter in member functions, drastically simplifying const/non-const and lvalue/rvalue method overloads.
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SanitizerPro
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1y ago · Jun 7, 2025 10:45 AM
#2
Instead of writing 4 separate overloads for operator[] (const, non-const, &, &&), you can write a single template method: template <typename Self> auto&& operator[](this Self&& self, size_t idx) { return std::forward<Self>(self).data[idx]; }!
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1y ago · Jun 7, 2025 12:45 PM
#3
It also makes implementing the Curiously Recurring Template Pattern (CRTP) trivial without inheriting from template base classes.
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