[][src]Crate ispell

This library provides an interface for easily calling the ispell, aspell or hunspell command from Rust programs.


use ispell::SpellLauncher;
let mut checker = SpellLauncher::new()
let errors = checker.check("Testing iff if it works").unwrap();
assert_eq!(&errors[0].misspelled, "iff");
assert_eq!(errors[0].position, 8);

The SpellLauncher

You can set the command that will be called by using the aspell, hunspell and ispell (default value) methods:

let result = SpellLauncher::new()
let result = SpellLauncher::new()

You can also set the dictionary that must be used:

let checker = SpellLauncher::new()

The SpellChecker

If the command has been launched successfully, it will return a SpellChecker.

Checking words

The main usage of this struct is using the check method to get the errors (IspellError) the spell checker detects. The ispell API returns the position (in characters) from the beginning of the line. This means that, if you want to be able do to anything with these numbers, you'll have to call check line by line.

This method returns a list of IspellErrors, containing:

  • the misspelled word;
  • the position (number of characters since the beginning of the line);
  • a (possibly empty) list of suggestions.
let mut checker = SpellLauncher::new()
let errors = checker.check("Does thit message contain any erors?").unwrap();
for e in errors {
    println!("{} was misspelled at pos {}.", e.misspelled, e.position);
    println!("There are {} suggestions for alternatives", e.suggestions.len());

SpellChecker also provides the check_raw method, whose behaviour mimics more closely ispell's output.

Adding words

There are two methods to add words so they are no more detected as errors:

  • add_word adds a word to this current session, but doesn't save it;
  • add_word_to_dictionary adds a word to your personal dictionary, saving it for next sessions.
let mut checker = SpellLauncher::new()
checker.add_word("foobar"); // Add a word only to this session
checker.add_word_to_dictionary("rustacean"); // Add a word and saves it
let errors = checker.check("foobar rustacean").unwrap();


ispell, aspell and hunspell all allow you to specify which dictionary must be used, but they don't necessarily use the same naming scheme. ispell uses full names:

let result = SpellLauncher::new()

hunspell uses unicode language codes:

let result = SpellLauncher::new()

whereas aspell accepts both versions.

Character encoding

This library tries to set encoding to utf-8, but ispell, hunspell and aspell take different arguments for that (-T, -i and --encoding, respectively). This is why you should use the ispell, aspell and hunspell methods intead of setting the command to invoke with the command method.


rust-ispell requires the 1.12.0 (or a more recent) version of the rustc compiler, since it uses the std::sync::mpcs::Receiver::recv_timeout that was only stabilized in this version.



Error type returned by methods of this library


An ispell error, corresponding to a word that isn't in the dictonary.


Spell Checker


Spell Launcher wizard (ah, ah). A builder for SpellChecker.



A result from ispell, corresponding to a line that is sent back for each word.

Type Definitions


Result type (returned by most methods of this library)