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

“conditional noexcept specification - one having the form noexcept (<expr>) where <expr> is both a conditional expression and a constant expression, used to determine at compile time whether that function is to be declared noexcept(true). noexcept Operator (639)” (EMCppSfe 2021)