Method parse_document

include/boost/json/basic_parser_impl.hpp:527–612

template<class Handler>
template<bool StackEmpty_>
const char*
basic_parser<Handler>::
parse_document(const char* p,
    std::integral_constant<bool, StackEmpty_> stack_empty)
{
    detail::const_stream_wrapper cs(p, end_);
    if(! stack_empty && ! st_.empty())
    {
        state st;
        st_.peek(st);
        switch(st)
        {
        default: goto do_doc2;
        case state::doc1:
                 st_.pop(st);
                 goto do_doc1;
        case state::doc3:
                 st_.pop(st);
                 goto do_doc3;
        case state::com1: case state::com2:
        case state::com3: case state::com4:
                 goto do_doc4;
        }
    }
do_doc1:
    cs = detail::count_whitespace(cs.begin(), cs.end());
    if(BOOST_JSON_UNLIKELY(! cs))
        return maybe_suspend(cs.begin(), state::doc1);
do_doc2:
    switch(+opt_.allow_comments |
        (opt_.allow_trailing_commas << 1) |
        (opt_.allow_invalid_utf8 << 2))
    {
    // no extensions
    default:
        cs = parse_value(cs.begin(), stack_empty, std::false_type(), std::false_type(), std::false_type(), opt_.allow_invalid_utf16);
        break;
    // comments
    case 1:
        cs = parse_value(cs.begin(), stack_empty, std::true_type(), std::false_type(), std::false_type(), opt_.allow_invalid_utf16);
        break;
    // trailing
    case 2:
        cs = parse_value(cs.begin(), stack_empty, std::false_type(), std::true_type(), std::false_type(), opt_.allow_invalid_utf16);
        break;
    // comments & trailing
    case 3:
        cs = parse_value(cs.begin(), stack_empty, std::true_type(), std::true_type(), std::false_type(), opt_.allow_invalid_utf16);
        break;
    // skip validation
    case 4:
        cs = parse_value(cs.begin(), stack_empty, std::false_type(), std::false_type(), std::true_type(), opt_.allow_invalid_utf16);
        break;
    // comments & skip validation
    case 5:
        cs = parse_value(cs.begin(), stack_empty, std::true_type(), std::false_type(), std::true_type(), opt_.allow_invalid_utf16);
        break;
    // trailing & skip validation