[Maxima-discuss] :lisp (describe '$tex)

[Eduardo O. <edu...@gm...>]

Hi list,

I just realized that I don't know how to go to the source of the "tex"
function... I did this,

  f  : x^3 * sqrt(1 - 4*x^2);
  F1 : 'integrate(f, x);
  F2 : changevar(F1, u=2*x, u, x);
  F3 : ev(F2, 'integrate);
  F4 : expand(F3);
  F5 : subst([u=2*x], F4);
  s  : sqrt(1-4*x^2);
  F6 : expand(F5/s)*s;
  tex(F6, false);

  :lisp (describe '$changevar)
  :lisp (describe '$tex)

and the ":lisp (describe '$changevar)" gave me lots of information:

  MAXIMA::$CHANGEVAR
    [symbol]

  $CHANGEVAR names a compiled function:
    Lambda-list: (&REST #:REST-ARG-1)
    Derived type: FUNCTION
    Source file: /home/edrx/bigsrc/maxima/src/outmis.lisp

  $CHANGEVAR has a compiler-macro:
    Documentation:
      Compiler-macro to convert calls to $CHANGEVAR to CHANGEVAR-IMPL
    Source file: /home/edrx/bigsrc/maxima/src/outmis.lisp

  Symbol-plist:
    SUBC -> NIL
    KIND -> (C)
    IMPL-NAME -> CHANGEVAR-IMPL
    TRANSLATED -> T
    ARG-LIST -> (EXPR TRANS NVAR OVAR)

when I'm connected to Sly I can type `M-.' on the "MAXIMA::$CHANGEVAR"
to go to the definition of changevar, and when I'm not using Sly I can
use the "/home/edrx/bigsrc/maxima/src/outmis.lisp" to go to the file
in which changevar is defined - so all good there. But the output of
":lisp (describe '$tex)" was just this:

  MAXIMA::$TEX
    [symbol]

  Symbol-plist:
    MFEXPR* -> #<FUNCTION (LAMBDA (L) :IN "/ho..

Is "tex" a different kind of function? Where can I read more about
that? What is the right way to inspect it?

  Thanks in advance!
    Eduardo Ochs
    http://angg.twu.net/eev-maxima.html