consteval

New-expression with consteval constructor in constexpr context

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The relevant wording is [expr.const]/13: An expression or conversion is an immediate invocation if it is a potentially-evaluated explicit or implicit invocation of an immediate function and is not in an immediate function context. An immediate invocation shall be a constant expression. Note the words ‘or conversion’ and ‘implicit invocation’ – this seems to imply … Read more

What is consteval?

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It declares immediate functions, that is, functions that must be evaluated at compile time to produce a constant. (It used to be spelled constexpr! in a previous revision of the paper.) In contrast, constexpr functions may be evaluated at compile time or run time, and need not produce a constant in all cases. The adopted … Read more

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