Language extensibility (was: Why is tcl broken?)

[Jeff Dalton]

Tim Bradshaw <tfb at tfeb.org> writes:

> * Lars Marius Garshol wrote:
> 
> > Huh? Forth dates back to the 60s, whereas Scheme is from 1975, and I'm
> > quite unsure of whether Chuck Moore knew Lisp at all.

Well *Lisp* dates back to the late 50s.  Scheme may be from 75,
but Lisp is a different matter.  And lambda calculus is, what,
1949?