Glen Whitney
686cd93927
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Adds type constants zero and one, and allows you to obtain them directly from a type object. This facility creates a behavior with a parametric type: the type of `math.zero(T)` where `T` is a Type object (i.e., has type `TypeOfTypes`) depends not just on that type TypeOfTypes, but instead on the _value_ of the argument `T`. Since nanomath is not (yet?) equipped to handle typing such a method, we just set its return type to a new constant NotAType that (hopefully) does not work with the rest of the type system. Also allows you to compute `zero` and `one` from an example value, rather than from the type object itself. Adds utility function `isZero` to test if a value is zero. As usual so far, the additions uncovered some remaining bugs, which this PR fixes. For example, there was a problem in that resolution of the `one` method was failing because the `Any` pattern was blocking matching of the `TypeOfTypes` pattern. Although we may eventually need to sort the patterns for a given method to maintain a reasonable matching order, for now the solution was just to move the two patterns into the same source file and explicitly order them. (With the way onType and Implementations are currently implemented, the proper ordering is more general to more specific, i.e. later implementations supersede earlier ones. Adds many new tests, as always. |
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| .. | ||
| __test__ | ||
| all.js | ||
| BooleanT.js | ||
| type.js | ||