# C++26 for C++14 Developers: STL-Preview Author Tony Lee Reply-To cosgenio@gmail.com ### 1. Introduction Since the introduction of modern C++ in 2011, the language has seen numerous enhancements on C++14 or C++17, with minimal adoption of C++20 or later $ ^{1} $ . This paper introduces $ stl-preview^{2} $ , a library that backports most of the latest STL features (including those from C++26) to implementations and bridging the gap for industries yet to upgrade their compilers. ### 2. Relevance stl-preview currently implements 281 out of 690 STL functions and classes introduced between C++17 and C++26