Method visitConstVal

parser/unparser.go:277–327

(val ref.Val)

}

func (un *unparser) visitConstVal(val ref.Val) error {
	optional := false
	if optVal, ok := val.(*types.Optional); ok {
		if !optVal.HasValue() {
			un.str.WriteString("optional.none()")
			return nil
		}
		optional = true
		un.str.WriteString("optional.of(")
		val = optVal.GetValue()
	}
	switch val := val.(type) {
	case types.Bool:
		un.str.WriteString(strconv.FormatBool(bool(val)))
	case types.Bytes:
		// bytes constants are surrounded with b"<bytes>"
		un.str.WriteString(`b"`)
		un.str.WriteString(bytesToOctets([]byte(val)))
		un.str.WriteString(`"`)
	case types.Double:
		// represent the float using the minimum required digits
		d := strconv.FormatFloat(float64(val), 'g', -1, 64)
		un.str.WriteString(d)
		if !strings.ContainsAny(d, ".eE") {
			un.str.WriteString(".0")
		}
	case types.Int:
		i := strconv.FormatInt(int64(val), 10)
		un.str.WriteString(i)
	case types.Null:
		un.str.WriteString("null")
	case types.String:
		// strings will be double quoted with quotes escaped.
		un.str.WriteString(strconv.Quote(string(val)))
	case types.Uint:
		// uint literals have a 'u' suffix.
		ui := strconv.FormatUint(uint64(val), 10)
		un.str.WriteString(ui)
		un.str.WriteString("u")
	case *types.Optional:
		if err := un.visitConstVal(val); err != nil {
			return err
		}
	default:
		return errors.New("unsupported constant")
	}
	if optional {
		un.str.WriteString(")")
	}
	return nil
}
func (un *unparser) visitConst(expr ast.Expr) error {
	val := expr.AsLiteral()
	if err := un.visitConstVal(val); err != nil {