On 16 Feb 2018, at 12:10, Bakul Shah <bakul@bitblocks.com> wrote:

Now you may quibble about "came from"

I do so quibble. In particular I quibble that features *that were not present in Algol*, such as full continuations (which I think exist in the AIM-349 language via CATCH) can have 'come from Algol'. Full continuations are the place where Scheme actually takes lexical scope seriously.

But I'm not interested in getting into a fight about this.

(I think, in terms of modern Scheme, CATCH is:

(define-syntax catch

(syntax-rules ()

((_ tag form ...)

(call/cc (λ (tag) form ...)))))

although I might be wrong)