Thank you. That's right and where usually issues arise and tools challenged. If the hello worlds case starts that complicated already I'm going to being careful

Thank you. That's right and where usually issues arise and tools challenged. If the hello worlds case starts that complicated already I'm going to being careful. I'm eager to gather info but the weak spots of headers (and macros) are obvious. Probably holding a waiting position for undefined time. At least as long Meson doesn't support them. Wikipedia contains false info about toolings: https://en.wikipedia.org/wiki/Modules_(C%2B%2B)#Tooling_support https://en.wikipedia.org/wiki/Modules_(C%2B%2B)#Tooling_supp... Meson doesn't support modules as of 2025-09-11. PS: I'm into new stuff when it looks stable and the benefits are obvious. But this looks complicated and backing out of complicated stuff is painful, when necessary.