Copyright | (c) Ross Paterson 2008 |
---|---|

License | BSD-style |

Maintainer | ross@soi.city.ac.uk |

Stability | experimental |

Portability | portable |

Safe Haskell | Safe-Inferred |

Language | Haskell2010 |

Searching unbounded intervals within bounded integral types for the boundary of an upward-closed set, using a combination of exponential and binary search.

# Documentation

search :: (Bounded a, Integral a) => (a -> Bool) -> Maybe a Source #

*O(log(abs n))*.
Search a bounded integral type.

If `p`

is an upward-closed predicate, `search p`

returns
`Just n`

if and only if `n`

is the least such satisfying `p`

.