You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: braces.go
    path of file: ./repos/devspace/vendor/mvdan.cc/sh/v3/syntax
    
    the code of the file until where you have to start completion: // Copyright (c) 2018, Daniel Mart√≠
    
func SplitBraces(word *Word) bool {
	any := false
	top := &Word{}
	acc := top
	var cur *BraceExp
	open := []*BraceExp{}

	pop := func() *BraceExp {
		old := cur
		open = open[:len(open)-1]
		if len(open) == 0 {
			cur = nil
			acc = top
		} else {
			cur = open[len(open)-1]
			acc = cur.Elems[len(cur.Elems)-1]
		}
		return old
	}
	addLit := func(lit *Lit) {
		acc.Parts = append(acc.Parts, lit)
	}

	for _, wp := range word.Parts {
		lit, ok := wp.(*Lit)
		if !ok {
			acc.Parts = append(acc.Parts, wp)
			continue
		}
		last := 0
		for j := 0; j < len(lit.Value); j++ {
			addlitidx := func() {
				if last == j {
					return // empty lit
				}
				l2 := *lit
				l2.Value = l2.Value[last:j]
				addLit(&l2)
			}
			switch lit.Value[j] {
			case '{':
				addlitidx()
				acc = &Word{}
				cur = &BraceExp{Elems: []*Word{acc}}
				open = append(open, cur)
			case ',':
				if cur == nil {
					continue
				}
				addlitidx()
				acc = &Word{}
				cur.Elems = append(cur.Elems, acc)
			case '.':
				if cur == nil {
					continue
				}
				if j+1 >= len(lit.Value) || lit.Value[j+1] != '.' {
					continue
				}
				addlitidx()
				cur.Sequence = true
				acc = &Word{}
				cur.Elems = append(cur.Elems, acc)
				j++
			case '}':
				if cur == nil {
					continue
				}
				any = true
				addlitidx()
				br := pop()
				if len(br.Elems) == 1 {
					// return {x} to a non-brace
					addLit(litLeftBrace)
					acc.Parts = append(acc.Parts, br.Elems[0].Parts...)
					addLit(litRightBrace)
					break
				}
				if !br.Sequence {
					acc.Parts = append(acc.Parts, br)
					break
				}
				var chars [2]bool
				broken := false
				for i, elem := range br.Elems[:2] {
					val := elem.Lit()
					if _, err := strconv.Atoi(val); err == nil {
					} else if len(val) == 1 &&
						'a' <= val[0] && val[0] <= 'z' {
						chars[i] = true
					} else {
						broken = true
					}
				}
				if len(br.Elems) == 3 {
					// increment must be a number
					val := br.Elems[2].Lit()
					if _, err := strconv.Atoi(val); err != nil {
						broken = true
					}
				}
				// are start and end both chars or
				// non-chars?
				if chars[0] != chars[1] {
					broken = true
				}
				if !broken {
					acc.Parts = append(acc.Parts, br)
					break
				}
				// return broken {x..y[..incr]} to a non-brace
				addLit(litLeftBrace)
				for i, elem := range br.Elems {
					if i > 0 {
						addLit(litDots)
					}
					acc.Parts = append(acc.Parts, elem.Parts...)
				}
				addLit(litRightBrace)
			default:
				continue
			}
			last = j + 1
		}
		if last == 0 {
			addLit(lit)
		} else {
			left := *lit
			left.Value = left.Value[last:]
			addLit(&left)
		}
	}
	if !any {
		return false
	}
	// open braces that were never closed fall back to non-braces
	for acc != top {
		br := pop()
		addLit(litLeftBrace)
		for i, elem := range br.Elems {
			if i > 0 {
				if br.Sequence {
					addLit(litDots)
				} else {
					addLit(litComma)
				}
			}
			acc.Parts = append(acc.Parts, elem.Parts...)
		}
	}
	*word = *top
	return true
}