Examples
// tabula rasa reset(); // manual gc mode (default) gc(%f) // x = %(Sym("x")) // prefer this y = Sym("y") // avoid that, see below ... // do some calculations ... x + y 2*y + 5 x*x + x // assign new value to "x" x: 2*y + 5 // so far, everything worked fine, but the ":" operator does not // allow (on purpose) a symbolic value as lhs, so the following // will fail ... y: x*x + x // furthermore, if we switch to automatic gc ... gc(%t) // even the following fails ... because "y" gets automatically // deleted after its first usage within "x+y" x + y 2*y + 5 x*x + x // clean-up gc(%f); reset(); clear x y; |  |  |