word.go

package main

type Word struct {
	surface  string
	lemma    string
	posTag   string
	cposTag  string
	idx      int
	head     int
	predHead int
	children []Word
}

func makeWord(surface string, posTag string, idx int, head int) *Word {
	return &Word{surface, surface, posTag, posTag, idx, head, head, make([]Word, 0)}
}

func makeRootWord() *Word {
	return makeWord("*ROOT*", "*ROOT*", 0, -1)
}

func (word *Word) appendChild(c *Word) []Word {
	word.children = append(word.children, *c)
	return word.children
}

func (word *Word) prependChild(c *Word) []Word {
	word.children = append([]Word{*c}, word.children...)
	return word.children
}

func (word *Word) LeftMostChild() *Word {
	if len(word.children) == 0 {
		return nil
	} else {
		return &word.children[0]
	}
}

func (word *Word) RightMostChild() *Word {
	if len(word.children) == 0 {
		return nil
	} else {
		return &word.children[len(word.children)-1]
	}
}