func limit()

in diff/diff.go [107:147]

• 32 lines of code
• 15 McCabe index (conditional complexity)

func limit(aObj, bObj interface{}, max int) (string, string) {
	elidedPrefix := ""
	elidedASuffix := ""
	elidedBSuffix := ""
	a, b := fmt.Sprintf("%#v", aObj), fmt.Sprintf("%#v", bObj)

	if aObj != nil && bObj != nil {
		if aType, bType := fmt.Sprintf("%T", aObj), fmt.Sprintf("%T", bObj); aType != bType {
			a = fmt.Sprintf("%s (%s)", a, aType)
			b = fmt.Sprintf("%s (%s)", b, bType)
		}
	}

	for {
		switch {
		case len(a) > max && len(a) > 4 && len(b) > 4 && a[:4] == b[:4]:
			// a is too long, b has data, and the first several characters are the same
			elidedPrefix = "..."
			a = a[2:]
			b = b[2:]

		case len(b) > max && len(b) > 4 && len(a) > 4 && a[:4] == b[:4]:
			// b is too long, a has data, and the first several characters are the same
			elidedPrefix = "..."
			a = a[2:]
			b = b[2:]

		case len(a) > max:
			a = a[:max]
			elidedASuffix = "..."

		case len(b) > max:
			b = b[:max]
			elidedBSuffix = "..."

		default:
			// both are short enough
			return elidedPrefix + a + elidedASuffix, elidedPrefix + b + elidedBSuffix
		}
	}
}