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74 lines
2 KiB
C++
74 lines
2 KiB
C++
#ifndef SPROUT_WEED_ATTR_CNV_RESULT_OF_TIMES_HPP
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#define SPROUT_WEED_ATTR_CNV_RESULT_OF_TIMES_HPP
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#include <cstddef>
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#include <type_traits>
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#include <sprout/config.hpp>
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#include <sprout/string.hpp>
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#include <sprout/array.hpp>
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#include <sprout/algorithm/string/join.hpp>
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#include <sprout/weed/unused.hpp>
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#include <sprout/weed/traits/type/is_char_type.hpp>
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#include <sprout/weed/traits/type/is_container.hpp>
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#include <sprout/weed/traits/type/is_unused.hpp>
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namespace sprout {
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namespace weed {
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namespace attr_cnv {
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namespace result_of {
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//
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// times
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//
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template<std::size_t Limit, typename T, typename = void>
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struct times;
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// times<N>(container<V, K>) -> container<V, N * K>
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template<std::size_t Limit, typename T>
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struct times<
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Limit,
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T,
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typename std::enable_if<
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Limit != std::size_t(-1)
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&& sprout::weed::traits::is_container<T>::value
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>::type
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> {
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public:
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typedef typename sprout::algorithm::result_of::join<
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sprout::array<T, Limit>
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>::type type;
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};
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// times<N>(V) -> container<V, N>
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template<std::size_t Limit, typename T>
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struct times<
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Limit,
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T,
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typename std::enable_if<
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Limit != std::size_t(-1)
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&& !sprout::weed::traits::is_container<T>::value
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&& !sprout::weed::traits::is_unused<T>::value
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>::type
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> {
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public:
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typedef typename std::conditional<
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sprout::weed::traits::is_char_type<T>::value,
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sprout::basic_string<T, Limit>,
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sprout::array<T, Limit>
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>::type type;
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};
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// times<N>(unused) -> unused
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template<std::size_t Limit, typename T>
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struct times<
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Limit,
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T,
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typename std::enable_if<
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sprout::weed::traits::is_unused<T>::value
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>::type
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> {
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public:
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typedef sprout::weed::unused type;
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};
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} // namespace result_of
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} // namespace attr_cnv
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} // namespace weed
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} // namespace sprout
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#endif // #ifndef SPROUT_WEED_ATTR_CNV_RESULT_OF_TIMES_HPP
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