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add utility flat_while_loop/flat_until_loop

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This commit is contained in:
bolero-MURAKAMI 2016-03-29 19:36:57 +09:00
parent 99860f4bc7
commit 7233a268fd
2 changed files with 6 additions and 10 deletions
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8
sprout/utility/until_loop.hpp
View file

@ -12,7 +12,6 @@
#include <sprout/utility/pair/pair.hpp>
namespace sprout {
#ifdef SPROUT_CONFIG_DISABLE_CXX14_CONSTEXPR
namespace detail {
template<typename T, typename Predicate>
inline SPROUT_CONSTEXPR sprout::pair<T, bool>
@ -60,21 +59,20 @@ namespace sprout {
typedef sprout::pair<T, bool> type;
return sprout::detail::until_loop_impl(type(init, false), pred, unary_op, 1).second;
}
#else
//
// until_loop
// flat_until_loop
//
// recursion depth:
// 0
//
template<typename T, typename Predicate, typename UnaryOperation>
inline SPROUT_CXX14_CONSTEXPR T
until_loop(T init, Predicate pred, UnaryOperation unary_op) {
flat_until_loop(T init, Predicate pred, UnaryOperation unary_op) {
for (; !pred(init); init = unary_op(init))
;
return init;
}
#endif
} // namespace sprout
#endif // #ifndef SPROUT_UTILITY_UNTIL_LOOP_HPP

8
sprout/utility/while_loop.hpp
View file

@ -12,7 +12,6 @@
#include <sprout/utility/pair/pair.hpp>
namespace sprout {
#ifdef SPROUT_CONFIG_DISABLE_CXX14_CONSTEXPR
namespace detail {
template<typename T, typename Predicate>
inline SPROUT_CONSTEXPR sprout::pair<T, bool>
@ -60,21 +59,20 @@ namespace sprout {
typedef sprout::pair<T, bool> type;
return sprout::detail::while_loop_impl(type(init, false), pred, unary_op, 1).second;
}
#else
//
// while_loop
// flat_while_loop
//
// recursion depth:
// 0
//
template<typename T, typename Predicate, typename UnaryOperation>
inline SPROUT_CXX14_CONSTEXPR T
while_loop(T init, Predicate pred, UnaryOperation unary_op) {
flat_while_loop(T init, Predicate pred, UnaryOperation unary_op) {
for (; pred(init); init = unary_op(init))
;
return init;
}
#endif
} // namespace sprout
#endif // #ifndef SPROUT_UTILITY_WHILE_LOOP_HPP