On 22 Dec 2011, at 22:24, Timothy Groves wrote:
On 11-12-22 04:04 PM, Anton Shepelev wrote:
But are "mutually recursive procedures and functions" necessary?
Not at all.
I think they are only unnecessary in the same sense that having
procedures/functions as a whole are unnecessary, just like for/do,
while/do, repeat/until etc:
* functions/procedures can be implemented by manually implementing a
stack
* loops can be implemented with a combination of if/then and goto
* mutually recursive procedures and functions can be implemented by
merging them into a single procedure/function, combining their
parameter lists and adding a boolean to select between the code bodies
of the two functions (or again by implementing the recursion via
manually implemented stacks)
The fact that something can also be implemented in a different way
does not mean it's not appropriate or even necessary to write readable
code.
Jonas
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