// Step 5 is the stemming of "e" and "l" sufficies
// found in R2.
//
func step5(w *snowballword.SnowballWord) bool {
// Last rune index = `lri`
lri := len(w.RS) - 1
// If R1 is emtpy, R2 is also empty, and we
// need not do anything in step 5.
//
if w.R1start > lri {
return false
}
if w.RS[lri] == 101 {
// The word ends with "e", which is unicode code point 101.
// Delete "e" suffix if in R2, or in R1 and not preceded
// by a short syllable.
if w.R2start <= lri || !endsShortSyllable(w, lri) {
w.ReplaceSuffix("e", "", true)
return true
}
return false
} else if w.R2start <= lri && w.RS[lri] == 108 && lri-1 >= 0 && w.RS[lri-1] == 108 {
// The word ends in double "l", and the final "l" is
// in R2. (Note, the unicode code point for "l" is 108.)
// Delete the second "l".
w.ReplaceSuffix("l", "", true)
return true
}
return false
}