package rfc8259boolean import ( "io" "sourcecode.social/reiver/go-erorr" ) // Parse tries to parse a JSON boolean literal β€” i.e., either 'false' or 'true'. // If it succeeds, then it return nil, and sets β€˜dst’ to the parsed value. // If it failed, it returns an error. // // Example usage: // // var rs io.RuneScaner // // // ... // // var value rfc8259boolean.Boolean // err := rfc8259.ParseTrue(rs, &value) // // if nil != err { // return err // } // // fmt.Printf("value = %#v\n", value) func Parse(runescanner io.RuneScanner, dst *Boolean) error { if nil == runescanner { return errNilRuneScanner } if nil == dst { return errNilDestination } var r rune { var err error r, _, err = runescanner.ReadRune() if nil != err { if io.EOF == err { return errUnexpectedEndOfFile } return errProblemReadingRune(err) } if err := runescanner.UnreadRune(); nil != err { return errProblemUnreadingRune(err, r) } } switch r { case 'f': if err := ParseFalse(runescanner); nil != err { return err } *dst = False() return nil case 't': if err := ParseTrue(runescanner); nil != err { return err } *dst = True() return nil default: return erorr.Errorf("rfc8259: problem when trying to parse JSON boolean literal β€” expected either 'false' or 'true' but first character was %q (%U)", r, r) } }