Formerly, when a self-reference like `self(Tuple<number>)` was encountered,
but the `Tuple<number>` instance of a `Tuple<T>` implementation for this
operation had not yet been instantiated, the reference would be fulfilled
with a call to the catchall implementation for `Tuple`. Now the
necessary instance is instantiated on the spot and referred to instead.
This change is used to complete return-type specification for all of the
Tuple functions.
Typed-function's sort order/matching algorithm was interfering with
template resolution. This commit solves the difficulty by moving the
"catchall" implementations that implement generation of new template
instances into a separate "fallback" typed-function universe, so that
Pocomath can control exactly when that is searched.
Removes a couple of the matching anomalies already noted in the tests.
Also extends return types to somewhat more functions.
Includes a full implementation of a type-homogeneous Tuple type, using the template types
feature, as a demonstration/check of its operation.
Co-authored-by: Glen Whitney <glen@studioinfinity.org>
Reviewed-on: #45
