P2843R3

Preprocessing is never undefined

Sofia, Jun 2025C++26Language

Removes the remaining undefined behaviour from preprocessing by making the cases ill-formed or conditionally-supported.

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Other papers in #embed & preprocessor (C++26/29)

P1967R14#embed - a simple, scannable preprocessor-based resource acquisition methodHagenberg 2025P4136R2#line is not in line with existing implementationCroydon 2026P3540R3#embed offset parameterBrno 2026All 4 papers in #embed & preprocessor (C++26/29) →