https://RustRocket.rs -- Cloud Monk Losang Jinpa, Ph.D., MCSE / MCT, https://Rustaceans.rs, Full Stack Cloud Native Rust DevOps Engineer - Rocket Framework Rust Microservices on Kubernetes-AWS-Azure-GCP

“deduction guide - an implicit or user-defined rule that tells the compiler how to deduce template arguments for a class template from a provided initializer — available as of C++17.” (EMCppSfe 2021)