Function xwords::parse::parse_word_boundaries

pub fn parse_word_boundaries(crossword: &Crossword) -> Vec<WordBoundary>

Parses a Crossword into a Vec<WordBoundary>. Returns all words present in the puzzle.

Note that every square in a Crossword is present in two word boundaries; one Down and one Across.

Also note that as a Crossword is being filled, the word boundaries do not change.