if consteval

LanguageC++232 papers3 connections

Branch on constant evaluation and make consteval propagate up through immediate-escalating functions.

Connected features

constexpr expansion (C++20)C++20consteval leads to if constevalif constexpr & selection statements with initializerC++17if consteval complements if constexprconstexpr relaxations (C++23)C++23consteval propagation builds on the constexpr relaxations

Papers

2 · Virtual Jun 2021 → Kona 2022

Adds if consteval to branch on constant evaluation, replacing awkward is_constant_evaluated() patterns and allowing calls to consteval functions.

Read P1938R3 on wg21.link →Paper page