If anybody has strong objections, we need to hear them!
As we have been writing code, I find increasingly that I want to be able
to use a two-legged if. In functional programs this form has fairly
limited value, but in stateful programs it is a very common idiom.
Because of this, I find myself writing:
(if e-test (begin e-then ())
())
a whole lot, purely to work around the fact that an IF form is required
to have two legs.
I finally got tired of this, and I have now added
(if e-test e-then)
to the spec as a derived form returning unit:
(if e-test e-then) =>
(if e-test (begin e-then ()) ())
shap
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