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CERN actually does that with CLING for interactive HEP data science. https://root.cern/cling/ https://root.cern/cling/

• sigjuice 5y ago
  Thanks! $ brew install cling $ cling ****************** CLING ****************** * Type C++ code and press enter to run it * * Type .q to exit * ******************************************* [cling]$ #include <stdio.h> [cling]$ #include <sys/utsname.h> [cling]$ struct utsname u; [cling]$ uname(&u); [cling]$ printf("%s %s %s\n", u.sysname, u.release, u.machine); Darwin 20.5.0 arm64
  • rahen 5y ago
    You can even use it interactively like ipython and get rid of the printf, as it automatically evaluates expressions. [cling]$ int i=21 (int) 21 [cling]$ i*2 (int) 42
    • sigjuice 5y ago
      Thanks! Is there a way to see strings nicely without printf? [cling]$ u.sysname (char [256]) "Darwin\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
      • clappski 5y ago
        I imagine if you printed an actual string it would look as you expect, issue is that you're printing a char array and not a C++ std::string/_view
        • sigjuice 5y ago
          Sure, but I’d expect the interpreter to have some smarts to do the right thing within reason.
          • clappski 5y ago
            But a char[] could be binary data for all the tool knows, do you want it to do a buffer overflow and end up bricking your computer? std::string etc. exist exactly because char[] is unsafe for holding strings unless you carry around a size.
            • deleted 5y ago
              [deleted]
            • sigjuice 5y ago
              There is a size in the example I posted above. [cling]$ u.sysname (char [256])
        • rahen 5y ago
          Indeed, this is the expected behavior with C arrays, regardless their type. The solutions are either to use a C++ std::string as you mentioned, or a typedef struct with a length property.
          • sigjuice 5y ago
            struct utsname is what it is. For me the appeal for something like cling would be doing quick experiments without any boilerplate.