func parsePercentW()

in fmt.go [101:132]

• 29 lines of code
• 7 McCabe index (conditional complexity)

func parsePercentW(format string) (idx int, newFormat string, ok bool) {
	// Loosely copied from golang.org/x/tools/go/analysis/passes/printf/printf.go.
	idx = -1
	ok = true
	n := 0
	sz := 0
	var isW bool
	for i := 0; i < len(format); i += sz {
		if format[i] != '%' {
			sz = 1
			continue
		}
		// "%%" is not a format directive.
		if i+1 < len(format) && format[i+1] == '%' {
			sz = 2
			continue
		}
		sz, isW = parsePrintfVerb(format[i:])
		if isW {
			if idx >= 0 {
				ok = false
			} else {
				idx = n
			}
			// "Replace" the last character, the 'w', with a 'v'.
			p := i + sz - 1
			format = format[:p] + "v" + format[p+1:]
		}
		n++
	}
	return idx, format, ok
}