IIFE for Complex Initialization
https://www.cppstories.com/2016/11/iife-for-complex-initialization/
The article examines the use of immediately‑invoked function expressions (IIFE) in C++ to perform complex variable initialization while preserving const correctness. It explains how a lambda that captures needed entities can be defined and called inline, eliminating the need for separate helper functions or mutable variables. Variations such as naming the lambda, employing std::invoke, and specifying precise capture lists are compared for readability and safety. An update notes that C++26 permits omission of empty parentheses on parameter‑less lambdas, simplifying the syntax. Practical examples include constructing an HTML string where the const result is produced by an IIFE. Benchmarks are presented, showing modest performance gains and confirming that modern compilers often generate code comparable to traditional approaches.