Comment by rwmj

Recently started hiding "... do" and "while (0);..." in macros to write nicely bracketed start and end C macros eg this set for generating HTML:

https://github.com/libguestfs/libguestfs-common/blob/master/...

You can write:

  start_element ("memory") {
    attribute ("unit", "MiB");
    string_format ("%d", g->memsize);
  } end_element ();

to generate <memory unit="MiB">1024</memory>