bump version to 12.2.2-pve1

[ceph.git] / ceph / src / boost / libs / metaparse / doc / int_to_digit_c.qbk

[#int_to_digit_c]
[section int_to_digit_c]

[h1 Synopsis]

  namespace util
  {
    template <int C>
    struct int_to_digit_c;
  }

This is a template class similar to a [link metafunction template metafunction]
but taking an `int` value as argument.

[table Arguments
  [[Name] [Type]]
  [[`C`]  [`int` value in the range `[0-9]`]]
]

[h1 Description]

Converts an integer value in the range `[0-9]` to a character representing that
decimal value.

[h1 Header]

  #include <boost/metaparse/util/int_to_digit_c.hpp>

[h1 Expression semantics]

The following pairs of expressions are equivalent

  int_to_digit_c<0>::type
  boost::mpl::char_<'0'>

  int_to_digit<9>::type
  boost::mpl::char_<'9'>

[h1 Example]

  #include <boost/metaparse/util/int_to_digit_c.hpp>
  
  using namespace boost::metaparse;
  
  static_assert(
    util::int_to_digit_c<0>::type::value == '0',
    "it should convert an integer value to the corresponding character"
  );
  
  static_assert(
    util::int_to_digit_c<3>::type::value == '3',
    "it should convert an integer to the corresponding character"
  );
  
  static_assert(
    util::int_to_digit_c<9>::type::value == '9',
    "it should convert an integer value to the corresponding character"
  );

[endsect]