73ef4ff3
 Hu Chunming
提交三方库
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[#string]
[section string]
[h1 Synopsis]
template <char C1, ..., char Cn>
struct string;
This is a [link metaprogramming_value template metaprogramming value].
[table Arguments
[[Name] [Type]]
[[`C1`..`Cn`] [character values]]
]
[h1 Description]
Compile-time data-structure describing a string object. These string objects are
compatible with `boost::mpl::string`, but they accept only individual characters
as arguments. When `constexpr` is available, they can be constructed using the
[link BOOST_METAPARSE_STRING `BOOST_METAPARSE_STRING`] macro.
The tag of the strings is [link string_tag `string_tag`].
[*C++98]: The maximum length of these strings is controlled by the
`BOOST_METAPARSE_LIMIT_STRING_SIZE` macro.
[*C++11]: The strings use variadic templates.
[h1 Header]
#include <boost/metaparse/string.hpp>
[h1 Example]
#include <boost/metaparse/string.hpp>
#include <type_traits>
using namespace boost::metaparse;
using hello1 = string<'H','e','l','l','o'>;
using hello2 = BOOST_METAPARSE_STRING("Hello");
static_assert(
std::is_same<
string<'H', 'e', 'l', 'l', 'o'>,
BOOST_METAPARSE_STRING("Hello")
>::type::value,
"The type generated by the macro should be identical to the hand-crafted one."
);
[endsect]
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