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Sprout/sprout/generator/generated_value.hpp

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destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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#ifndef SPROUT_GENERATOR_GENERATED_VALUE_HPP
#define SPROUT_GENERATOR_GENERATED_VALUE_HPP
#include <utility>
#include <type_traits>
#include <sprout/utility/forward.hpp>
#include <sprout/type_traits/enabler_if.hpp>
#include <sprout/tuple/tuple/get.hpp>
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#include <sprout/adl/not_found.hpp>
namespace sprout_adl {
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sprout::not_found_via_adl generated_value(...);
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} // namespace sprout_adl
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namespace sprout_generator_detail {
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using sprout::tuples::get;
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using sprout_adl::generated_value;
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template<typename T>
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struct has_mem_generated_value_test {
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public:
template<
typename U = T,
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typename = decltype(std::declval<U>().generated_value())
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>
static std::true_type test(int);
static std::false_type test(...);
};
template<typename T>
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struct has_mem_generated_value
: public decltype(sprout_generator_detail::has_mem_generated_value_test<T>::test(0))
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{};
template<typename T>
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struct has_adl_generated_value_test {
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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public:
template<
typename U = T,
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typename sprout::enabler_if<
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sprout::is_found_via_adl<decltype(generated_value(std::declval<U>()))>::value
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>::type = sprout::enabler
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>
static std::true_type test(int);
static std::false_type test(...);
};
template<typename T>
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struct has_adl_generated_value
: public decltype(sprout_generator_detail::has_adl_generated_value_test<T>::test(0))
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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{};
template<typename T>
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struct has_get_generated_value_test {
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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public:
template<
typename U = T,
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typename = decltype(get<0>(std::declval<U>()))
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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>
static std::true_type test(int);
static std::false_type test(...);
};
template<typename T>
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struct has_get_generated_value
: public decltype(sprout_generator_detail::has_get_generated_value_test<T>::test(0))
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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{};
template<typename T, typename Enable = void>
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struct select_mem_generated_value;
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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template<typename T>
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struct select_mem_generated_value<
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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T,
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typename std::enable_if<sprout_generator_detail::has_mem_generated_value<T>::value>::type
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>
: public std::true_type
{};
template<typename T>
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struct select_mem_generated_value<
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T,
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typename std::enable_if<!sprout_generator_detail::has_mem_generated_value<T>::value>::type
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>
: public std::false_type
{};
template<typename T, typename Enable = void>
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struct select_adl_generated_value;
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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template<typename T>
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struct select_adl_generated_value<
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T,
typename std::enable_if<
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sprout_generator_detail::has_adl_generated_value<T>::value
&& !sprout_generator_detail::has_mem_generated_value<T>::value
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>::type
>
: public std::true_type
{};
template<typename T>
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struct select_adl_generated_value<
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T,
typename std::enable_if<!(
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sprout_generator_detail::has_adl_generated_value<T>::value
&& !sprout_generator_detail::has_mem_generated_value<T>::value
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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)>::type
>
: public std::false_type
{};
template<typename T, typename Enable = void>
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struct select_get_generated_value;
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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template<typename T>
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struct select_get_generated_value<
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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T,
typename std::enable_if<
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sprout_generator_detail::has_get_generated_value<T>::value
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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&& !sprout_generator_detail::has_mem_generated_value<T>::value
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&& !sprout_generator_detail::has_adl_generated_value<T>::value
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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>::type
>
: public std::true_type
{};
template<typename T>
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struct select_get_generated_value<
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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T,
typename std::enable_if<!(
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sprout_generator_detail::has_get_generated_value<T>::value
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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&& !sprout_generator_detail::has_mem_generated_value<T>::value
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&& !sprout_generator_detail::has_adl_generated_value<T>::value
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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)>::type
>
: public std::false_type
{};
template<typename T, typename = void>
struct noexcept_generated_value;
template<typename T>
struct noexcept_generated_value<T, typename std::enable_if<sprout_generator_detail::select_mem_generated_value<T>::value>::type>
: public std::integral_constant<bool, SPROUT_NOEXCEPT_EXPR_OR_DEFAULT(std::declval<T>().generated_value(), false)>
{};
template<typename T>
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struct noexcept_generated_value<T, typename std::enable_if<sprout_generator_detail::select_adl_generated_value<T>::value>::type>
: public std::integral_constant<bool, SPROUT_NOEXCEPT_EXPR_OR_DEFAULT(generated_value(std::declval<T>()), false)>
{};
template<typename T>
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struct noexcept_generated_value<T, typename std::enable_if<sprout_generator_detail::select_get_generated_value<T>::value>::type>
: public std::integral_constant<bool, SPROUT_NOEXCEPT_EXPR_OR_DEFAULT(get<0>(std::declval<T>()), false)>
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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{};
template<typename T, typename = void>
struct generated_value_result;
template<typename T>
struct generated_value_result<T, typename std::enable_if<sprout_generator_detail::select_mem_generated_value<T>::value>::type> {
public:
typedef decltype(std::declval<T>().generated_value()) type;
};
template<typename T>
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struct generated_value_result<T, typename std::enable_if<sprout_generator_detail::select_adl_generated_value<T>::value>::type> {
public:
typedef decltype(generated_value(std::declval<T>())) type;
};
template<typename T>
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struct generated_value_result<T, typename std::enable_if<sprout_generator_detail::select_get_generated_value<T>::value>::type> {
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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public:
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typedef decltype(get<0>(std::declval<T>())) type;
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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};
template<
typename T,
typename sprout::enabler_if<sprout_generator_detail::select_mem_generated_value<T>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR typename sprout_generator_detail::generated_value_result<T>::type
generated_value_impl(T&& t)
SPROUT_NOEXCEPT_EXPR((sprout_generator_detail::noexcept_generated_value<T>::value))
{
return sprout::forward<T>(t).generated_value();
}
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template<
typename T,
typename sprout::enabler_if<sprout_generator_detail::select_adl_generated_value<T>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR typename sprout_generator_detail::generated_value_result<T>::type
generated_value_impl(T&& t)
SPROUT_NOEXCEPT_EXPR((sprout_generator_detail::noexcept_generated_value<T>::value))
{
return generated_value(sprout::forward<T>(t));
}
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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template<
typename T,
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typename sprout::enabler_if<sprout_generator_detail::select_get_generated_value<T>::value>::type = sprout::enabler
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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>
inline SPROUT_CONSTEXPR typename sprout_generator_detail::generated_value_result<T>::type
generated_value_impl(T&& t)
SPROUT_NOEXCEPT_EXPR((sprout_generator_detail::noexcept_generated_value<T>::value))
{
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return get<0>(sprout::forward<T>(t));
destructive change sprout::generate -> sprout::unfold add range adapter reversed, replaced, filtered
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}
} // namespace sprout_generator_detail
namespace sprout {
namespace generators {
//
// generated_value
//
template<typename T>
inline SPROUT_CONSTEXPR typename sprout_generator_detail::generated_value_result<T>::type
generated_value(T&& t)
SPROUT_NOEXCEPT_EXPR((sprout_generator_detail::noexcept_generated_value<T>::value))
{
return sprout_generator_detail::generated_value_impl(sprout::forward<T>(t));
}
} // namespace generators
using sprout::generators::generated_value;
} // namespace sprout
#endif // #ifndef SPROUT_GENERATOR_GENERATED_VALUE_HPP
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