83 lines
1.8 KiB
C++
83 lines
1.8 KiB
C++
//
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// Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
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// Copyright (c) 2022 Alan de Freitas (alandefreitas at gmail dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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// Official repository: https://github.com/boostorg/url
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//
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#ifndef BOOST_URL_GRAMMAR_UNSIGNED_RULE_HPP
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#define BOOST_URL_GRAMMAR_UNSIGNED_RULE_HPP
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#include <boost/url/detail/config.hpp>
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#include <boost/url/error_types.hpp>
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#include <boost/url/grammar/charset.hpp>
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#include <boost/core/detail/string_view.hpp>
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#include <boost/static_assert.hpp>
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#include <limits>
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#include <type_traits>
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namespace boost {
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namespace urls {
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namespace grammar {
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/** Match an unsigned decimal
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Extra leading zeroes are disallowed.
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@par Value Type
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@code
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using value_type = Unsigned;
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@endcode
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@par Example
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Rules are used with the function @ref parse.
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@code
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system::result< unsigned short > rv = parse( "32767", unsigned_rule< unsigned short >{} );
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@endcode
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@par BNF
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@code
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unsigned = "0" / ( ["1"..."9"] *DIGIT )
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@endcode
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@tparam Unsigned The unsigned integer type used
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to store the result.
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@see
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@ref grammar::parse.
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*/
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#ifdef BOOST_URL_DOCS
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template<class Unsigned>
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struct unsigned_rule;
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#else
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template<class Unsigned>
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struct unsigned_rule
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{
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BOOST_STATIC_ASSERT(
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std::numeric_limits<
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Unsigned>::is_integer &&
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! std::numeric_limits<
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Unsigned>::is_signed);
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using value_type = Unsigned;
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auto
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parse(
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char const*& it,
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char const* end
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) const noexcept ->
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system::result<value_type>;
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};
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#endif
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} // grammar
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} // urls
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} // boost
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#include <boost/url/grammar/impl/unsigned_rule.hpp>
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#endif
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