NLP.Stemmer.C

Haskell bindings for the Snowball stemming library. This module contains all the low-level functions and are more or less direct translations of the foreign function calls. The stem function expects strings to use UTF-8 encoding.

Types

data Algorithm

Available algorithms. For English, English is recommended over Porter.

Constructors

Danish

Dutch

English

Finnish

French

German

Hungarian

Italian

Norwegian

Portuguese

Romanian

Russian

Spanish

Swedish

Turkish

Porter

Instances

Show Algorithm

type Stemmer = Ptr StemmerStruct

Pointer to a stemmer instance

Low level functions

new :: Algorithm -> IO Stemmer

Create a new stemmer instance. When you're done using the stemmer, you should delete it, freeing the memory.

delete :: Stemmer -> IO ()

Delete a stemmer instance. Don't use it after deleting.

stem :: Stemmer -> String -> IO String

Stem a word using the stemmer instance.

Wrapper

withStemmer :: Algorithm -> (Stemmer -> IO a) -> IO a

Perform stemming using a wrapper handling the low-level creation and deletion of the stemmer instance.