ccls/index_tests/preprocessor/include_guard.cc

#ifndef FOO
#define FOO

#endif

/*
OUTPUT:
{
  "includes": [],
  "skipped_by_preprocessor": [],
  "types": [],
  "funcs": [],
  "vars": [{
      "id": 0,
      "usr": 11674328179498211370,
      "detailed_name": "FOO",
      "qual_name_offset": 0,
      "short_name": "FOO",
      "hover": "#define FOO",
      "declarations": [],
      "spell": "2:9-2:12|-1|1|2",
      "extent": "2:9-2:12|-1|1|0",
      "uses": [],
      "kind": 255,
      "storage": 0
    }]
}
*/