Summary
This episode builds on the previous discussion of C++23's 'if consteval' feature (episode 304), correcting and expanding on its primary motivation. Jason demonstrates that while 'if consteval' does simplify code compared to 'std::is_constant_evaluated()', its most important feature is enabling better interoperability between constexpr and consteval (immediate) functions. The episode shows how 'if consteval' helps the compiler trace values known at compile time through function calls, making it possible to safely call consteval functions with parameters that might otherwise appear to be runtime values.
Related C++ Standard Sections
This episode covers topics found in these sections of the C++ standard:
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[meta.const.eval]78% match