Copyright	(c) 2009 2010 Bryan O'Sullivan
License	BSD-style
Maintainer	bos@serpentine.com
Stability	experimental
Portability	GHC
Safe Haskell	None
Language	Haskell2010

Data.Text.Internal.Lazy.Fusion

Description

Warning: this is an internal module, and does not have a stable API or name. Functions in this module may not check or enforce preconditions expected by public modules. Use at your own risk!

Core stream fusion functionality for text.

Synopsis

stream :: Text -> Stream Char
unstream :: Stream Char -> Text
unstreamChunks :: Int -> Stream Char -> Text
length :: Stream Char -> Int64
unfoldrN :: Int64 -> (a -> Maybe (Char, a)) -> a -> Stream Char
index :: HasCallStack => Stream Char -> Int64 -> Char
countChar :: Char -> Stream Char -> Int64

Documentation

stream :: Text -> Stream Char Source #

O(n) Convert a Text into a 'Stream Char'.

unstream :: Stream Char -> Text Source #

O(n) Convert a 'Stream Char' into a Text, using defaultChunkSize.

unstreamChunks :: Int -> Stream Char -> Text Source #

O(n) Convert a 'Stream Char' into a Text, using the given chunk size.

length :: Stream Char -> Int64 Source #

O(n) Returns the number of characters in a text.

unfoldrN :: Int64 -> (a -> Maybe (Char, a)) -> a -> Stream Char Source #

O(n) Like unfoldr, unfoldrN builds a stream from a seed value. However, the length of the result is limited by the first argument to unfoldrN. This function is more efficient than unfoldr when the length of the result is known.

index :: HasCallStack => Stream Char -> Int64 -> Char Source #

O(n) stream index (subscript) operator, starting from 0.

countChar :: Char -> Stream Char -> Int64 Source #

O(n) The count function returns the number of times the query element appears in the given stream.