https://quhongbin.github.io/tags/cs/Recent content in Cs on 我的博客Hugozh-CNhttps://quhongbin.github.io/posts/1/01/c-templates/Mon, 01 Jan 0001 00:00:00 +0000https://quhongbin.github.io/posts/1/01/c-templates/<h1 id="c-templates">C++ Templates</h1> <p>Templates are C++'s mechanism for <strong>generic programming</strong> &mdash; writing code that works with any type without repeating yourself. Unlike runtime polymorphism (virtual functions), templates are resolved entirely at compile time: the compiler generates a separate copy of the function or class for each set of type arguments actually used. This is called <strong>template instantiation</strong>.</p> <p>Templates are the foundation of the C++ Standard Library: <code>std::vector&lt;int&gt;</code>, <code>std::map&lt;std::string, double&gt;</code>, <code>std::sort(begin, end)</code> &mdash; all templates. They power everything from containers to algorithms to smart pointers. Understanding templates deeply means understanding how modern C++ achieves its combination of abstraction and zero-overhead performance.</p>