var deburrLetter = require('./_deburrLetter'),

toString = require('./toString');

/** Used to match Latin Unicode letters (excluding mathematical operators). */ var reLatin = /[xc0-xd6xd8-xf6xf8-xffu0100-u017f]/g;

/** Used to compose unicode character classes. */ var rsComboMarksRange = '\u0300-\u036f',

reComboHalfMarksRange = '\\ufe20-\\ufe2f',
rsComboSymbolsRange = '\\u20d0-\\u20ff',
rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange;

/** Used to compose unicode capture groups. */ var rsCombo = '[' + rsComboRange + ']';

/**

* Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and
* [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).
*/

var reComboMark = RegExp(rsCombo, 'g');

/**

* Deburrs `string` by converting
* [Latin-1 Supplement](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
* and [Latin Extended-A](https://en.wikipedia.org/wiki/Latin_Extended-A)
* letters to basic Latin letters and removing
* [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).
*
* @static
* @memberOf _
* @since 3.0.0
* @category String
* @param {string} [string=''] The string to deburr.
* @returns {string} Returns the deburred string.
* @example
*
* _.deburr('déjà vu');
* // => 'deja vu'
*/

function deburr(string) {

string = toString(string);
return string && string.replace(reLatin, deburrLetter).replace(reComboMark, '');

}

module.exports = deburr;