template-argument-deduction – Page 2

What is a nondeduced context?

February 2, 2023 by Tarik

Deduction refers to the process of determining the type of a template parameter from a given argument. It applies to function templates, auto, and a few other cases (e.g. partial specialization). For example, consider: template <typename T> void f(std::vector<T>); Now if you say f(x), where you declared std::vector<int> x;, then T is deduced as int, … Read more

What are template deduction guides and when should we use them?

December 29, 2022 by Tarik

Template deduction guides are patterns associated with a template class that tell the compiler how to translate a set of constructor arguments (and their types) into template parameters for the class. The simplest example is that of std::vector and its constructor that takes an iterator pair. template<typename Iterator> void func(Iterator first, Iterator last) { vector … Read more