Function: fboundp
fboundp is a function defined in data.c.
Signature
(fboundp SYMBOL)
Documentation
Return t if SYMBOL's function definition is not void.
Probably introduced at or before Emacs version 16.
Source Code
// Defined in /usr/src/emacs/src/data.c
{
CHECK_SYMBOL (symbol);
return NILP (XSYMBOL (symbol)->u.s.function) ? Qnil : Qt;
}