Data.BTree.Primitives.Exception

A collection of exceptions that can be raised in the pure algorithms in Data.BTree.Primitives, Data.BTree.Impure and Data.BTree.Pure.

Re-exports

throw :: Exception e => e -> a

Throw an exception. Exceptions may be thrown from purely functional code, but may only be caught within the IO monad.

Custom exceptions

data TreeAlgorithmError

An exception raised when the pure modification algorithms are called using invalid state.

This exception is only raised when a the library contains a bug.

The first argument is a function name indicating the location of the error. The second argument is the description of the error.

Constructors

TreeAlgorithmError String String

Instances

Show TreeAlgorithmError

Methods

showsPrec :: Int -> TreeAlgorithmError -> ShowS

show :: TreeAlgorithmError -> String

showList :: [TreeAlgorithmError] -> ShowS

Exception TreeAlgorithmError

Methods

toException :: TreeAlgorithmError -> SomeException

fromException :: SomeException -> Maybe TreeAlgorithmError

displayException :: TreeAlgorithmError -> String

data KeyTooLargeError

An exception thrown when the keys inserted in the database are larger than maxKeySize.

Note that this exception can be thrown long after the key violating the maximum key size was inserted. It is only detected when the tree modification algorithms try to split the node containing that key.

Increase the page size to fix this problem.

Constructors

KeyTooLargeError

Instances

Show KeyTooLargeError

Methods

showsPrec :: Int -> KeyTooLargeError -> ShowS

show :: KeyTooLargeError -> String

showList :: [KeyTooLargeError] -> ShowS

Exception KeyTooLargeError

Methods

toException :: KeyTooLargeError -> SomeException

fromException :: SomeException -> Maybe KeyTooLargeError

displayException :: KeyTooLargeError -> String