Header file is both a huge strength and weakness of C/C++ and are really an anachronism now. It's very general purpose text substitution, which is very powerful

Header file is both a huge strength and weakness of C/C++ and are really an anachronism now. It's very general purpose text substitution, which is very powerful, but means you have to include .h files to get types, signatures and so on. This kills binary compatibility (specificially, if you're linking to static or shared libraries, you still need a .h file). Even C++ templates aren't really much better and they're still text replacement. More modern languages have taken the use cases for .h files and incorporated them without the general purpose text substitution. Like Rust's macros a superior to #define macros. Type aliases (in various langauges) are better than #define uint32 unsigned int.