Re: x3 grammar rules

It's just text. I've changed the last line from '1 end' to be ...
        1 my_label

The rule to cover this is listed as ...

    x3::rule<class _group> const _group = "_group";
    auto const _group_def = int_ >> *(char_);
    BOOST_SPIRIT_DEFINE(_group);

On Thu, Jul 6, 2017 at 12:31 AM, Olaf Peter <[email protected]> wrote:
> [...]
>
>> Basically, I'd like to know if I'm going about the grammar correctly
>> as I'm trying to parse the entire file at once.
>>
>>      namespace client {
>>          // ...
>>
>>          // parse line of characters
>>          x3::rule<class _desc> const _desc = "_desc";
>>          auto const _desc_def = *(char_ - eol);
>>          BOOST_SPIRIT_DEFINE(_desc);
>>
>>          // parse 1 2 3
>>          x3::rule<class _number> const _number = "_number";
>>          auto const _number_def = int_ >> int_ >> int_;
>>          BOOST_SPIRIT_DEFINE(_number);
>>
>>          // parse 1 0.0 0.0 0.0
>>          x3::rule<class _point> const _point = "_point";
>>          auto const _point_def = int_ >> double_ >> double_ >> double_;
>>          BOOST_SPIRIT_DEFINE(_point);
>>
>>          // parse int chars int int int "1 tri 1 2 3"
>>          x3::rule<class _element> const _element = "_element";
>>          auto const _element_def = int_ >> *(char_) >> int_ >> int_ >>
>> int_;
>>          BOOST_SPIRIT_DEFINE(_element);
>>
>>          // parse int int int "4 5 6"
>>          x3::rule<class _elem_points> const _elem_points = "_elem_points";
>>          auto const _elem_points_def = int_ >> int_ >> int_;
>>          BOOST_SPIRIT_DEFINE(_elem_points);
>>
>>          x3::rule<class _group> const _group = "_group";
>>          auto const _group_def = int_ >> *(char_);
>>          BOOST_SPIRIT_DEFINE(_group);
>>
>>          auto description = skip(blank) [
>>              *(_desc >> eol)
>>          ];
>>
>>          auto numbers = skip(blank) [
>>              *(_number >> eol)
>>          ];
>>
>>          auto point = skip(blank) [
>>              *(_point >> eol)
>>          ];
>>
>>          // parse two lines instead of 2nd line which looks the same, but
>>          // has no element before it
>>          // 1 tri  1 2 3
>>          // 4 5 6
>>          auto element = skip(blank) [
>>              *(_element >> eol >> _elem_points >> eol)
>>          ];
>>
>>          auto group = skip(blank) [
>>              *(_group >> eol)
>>          ];
>>
>>          auto pr = [&] (auto& ctx) {
>>              std::cout << "hi " << std::endl;
>>              //cout << "desc = " << _attr(ctx) << endl;
>>          };
>>
>>          auto const input = description[pr]
>>              >> numbers[pr]
>>              >> point[pr]
>>              >> element[pr]
>>              >> group[pr];
>>          }
>>      }
>>
>>      int main() {
>>          // ...
>>
>>          mapped_file_source map(fil);
>>          istringstream iss(map.data());
>>          map.close();
>>
>>          boost::spirit::istream_iterator iter(iss >> noskipws), eof;
>>
>>          x3::parse(iter, eof,  client::input);
>>
>>          return (iter != eof);
>>      }
>>
>> And the file I'm trying to parse is formatted as follows, only much
>> larger.
>>
>>      my file description
>>      1 2 3
>>      1 0.0 0.0 0.0
>>      2 0.0 0.0 0.0
>>      3 0.0 0.0 0.0
>>      1 tri 1 3 1
>>      1 2 3
>>      2 tri 1 3 1
>>      4 5 6
>>      3 tri 1 3 1
>>      7 8 9
>>      1 end
>>
>> Here is the output of running this. I get a 'hi' for each rule, but I
>> don't get an error saying it didn't parse the entire file. Can anyone
>> offer some guidance.
>
>
> at the end of input file, is 'end' at the last line a keyword and your
> marker for EOL since I've not seen a rule for the keyword 'end'. This would
> explain the remainding iter != eof
>
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