emacs lisp 中定义的 most-positive-fixnum 在哪个文件中

In which file is most-positive-fixnum defined in emacs lisp

问题如题。 most-positive-fixnum 在哪里定义的? lisp.h?

src/data.c

DEFVAR_LISP ("most-positive-fixnum", Vmost_positive_fixnum,
             doc: /* The largest value that is representable in a Lisp integer.  */);
Vmost_positive_fixnum = make_number (MOST_POSITIVE_FIXNUM);
XSYMBOL (intern_c_string ("most-positive-fixnum"))->constant = 1;