Rewrite the (while ..) macro. #23
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This now allows the use of an arbitrary body, as can be seen
in the following test:
```
(set! p 4)
(while (<= p 10)
(print "Pxx: %s" p)
(set! p (+ p 1) true)
)
```
The new approach defines a local lambda, with a random name, and
calls that recursively when the conditional is true.
This closes #21, though we still need to use the three-argument
form of (set!) as our scoping/environment is confused - that is
tracked in #22.
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This now allows the use of an arbitrary body, as can be seen in the following test:
The new approach defines a local lambda, with a random name, and calls that recursively when the conditional is true.
This closes #21, though we still need to use the three-argument form of (set!) as our scoping/environment is confused - that is tracked in #22.