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https://github.com/bolero-MURAKAMI/Sprout.git
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48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
#ifndef SPROUT_WEED_PARSER_AUXILIARY_EPS_HPP
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#define SPROUT_WEED_PARSER_AUXILIARY_EPS_HPP
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#include <cstddef>
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#include <sprout/config.hpp>
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#include <sprout/type_traits/identity.hpp>
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#include <sprout/weed/unused.hpp>
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#include <sprout/weed/parser_result.hpp>
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#include <sprout/weed/parser/parser_base.hpp>
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namespace sprout {
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namespace weed {
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//
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// eps_p
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//
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struct eps_p
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: public sprout::weed::parser_base
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{
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public:
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template<typename Context, typename Iterator>
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struct attribute
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: public sprout::identity<sprout::weed::unused>
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{};
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template<typename Context, typename Iterator>
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struct result
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: public sprout::identity<sprout::weed::parser_result<Iterator, typename attribute<Context, Iterator>::type> >
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{};
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public:
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template<typename Context, typename Iterator>
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SPROUT_CONSTEXPR typename result<Context, Iterator>::type operator()(
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Iterator first,
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Iterator last,
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Context const&
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) const
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{
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typedef typename result<Context, Iterator>::type result_type;
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typedef typename attribute<Context, Iterator>::type attribute_type;
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return result_type(true, first, attribute_type());
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}
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};
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//
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// eps
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//
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SPROUT_STATIC_CONSTEXPR sprout::weed::eps_p eps = sprout::weed::eps_p();
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} // namespace weed
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} // namespace sprout
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#endif // #ifndef SPROUT_WEED_PARSER_AUXILIARY_EPS_HPP
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