_Based

The names of the product elements

The name of the type

Balanced-ternary digits, using T for the digit -1.

The digit set is {-1, 0, 1} — the same alphabet the symmetric ternary logic uses, which is why this base belongs in the library rather than being a bare utility.

Unsigned digit string of n in base, with a leading - for a negative value.

Builds a based integer, collapsing to a plain _Number when there is nothing to remember.

Base 10, a non-integral value, a non-finite one, or a base outside 2 .. 36 all yield a _Number: only a genuinely based integer becomes a _Based, exactly as _Truth.of collapses the crisp endpoints and _Complex.of collapses a zero imaginary part.

Parses a balanced-ternary digit string (T = -1), or None on an invalid digit.

Parses a digit string in base, or None on an invalid digit.

Radix bounds: 2 is the smallest meaningful base, 36 exhausts 0-9A-Z.