| definition: |
pred :: Nat -> Nat pred IHi = failed -- 1 has no predecessor pred (O IHi) = IHi -- 2 - 1 = 1 pred (O x@(O _)) = I (pred x) -- 2*2*n - 1 = 2*(2*n-1) + 1 pred (O (I x)) = I (O x) -- 2*(2*n + 1) - 1 = 2*2*n + 1 pred (I x) = O x -- 2*n + 1 -1 = 2*n |
| demand: |
argument 1 |
| deterministic: |
deterministic operation |
| documentation: |
--- Predecessor, O(n) |
| failfree: |
{I,O}
|
| indeterministic: |
referentially transparent operation |
| infix: |
no fixity defined |
| iotype: |
{({O}) |-> {I,IHi} || ({I}) |-> {O}}
|
| name: |
pred |
| precedence: |
no precedence defined |
| result-values: |
{I,IHi,O}
|
| signature: |
Nat -> Nat |
| solution-complete: |
operation might suspend on free variables |
| terminating: |
yes |
| totally-defined: |
possibly non-reducible on same data term |