[#unpaired]
[section unpaired]

[h1 Synopsis]

  namespace error
  {
    template <int Line, int Col, class Msg = boost::mpl::na>
    struct unpaired;
  }

This is a [link parsing_error_message parsing error message].

[table Arguments
  [[Name]   [Type]]
  [[`Line`] [`int` value]]
  [[`Col`]  [`int` value]]
  [[`Msg`]  [[link metaprogramming_value template metaprogramming value]]]
]

[h1 Description]

Template class representing the error that the closing element of an
"['opening element] ... ['closing element]" structure is missing. (eg. a closing
paren is missing). `Line` and `Col` point to the beginning of the
['opening element] (eg. the opening paren). `Msg` is the error message the
parser trying to parse the ['closing element] failed with.

It supports currying: `unpaired<Line, Col>` is a
[link metafunction_class template metafunction class] taking one argument: the
`Msg` element and returning the corresponding `unpaired` value.

[h1 Header]

  #include <boost/metaparse/error/unpaired.hpp>

[endsect]