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pipeable foldl/foldr func variant

master
Daniel Kolesa 2016-04-29 17:47:04 +01:00
parent fcd0616f4d
commit e33797e571
1 changed files with 12 additions and 2 deletions
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14
ostd/algorithm.hh
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@ -553,7 +553,7 @@ inline T foldl(R range, T init) {
}
template<typename R, typename T, typename F>
inline T foldl(R range, T init, F func) {
inline T foldl_f(R range, T init, F func) {
for (; !range.empty(); range.pop_front())
init = func(init, range.front());
return init;
@ -562,6 +562,11 @@ inline T foldl(R range, T init, F func) {
template<typename T> inline auto foldl(T init) {
return [&init](auto &obj) { return foldl(obj, move(init)); };
}
template<typename T, typename F> inline auto foldl_f(T init, F func) {
return [&init, &func](auto &obj) {
return foldl_f(obj, move(init), move(func));
};
}
template<typename R, typename T>
inline T foldr(R range, T init) {
@ -571,7 +576,7 @@ inline T foldr(R range, T init) {
}
template<typename R, typename T, typename F>
inline T foldr(R range, T init, F func) {
inline T foldr_f(R range, T init, F func) {
for (; !range.empty(); range.pop_back())
init = func(init, range.back());
return init;
@ -580,6 +585,11 @@ inline T foldr(R range, T init, F func) {
template<typename T> inline auto foldr(T init) {
return [&init](auto &obj) { return foldr(obj, move(init)); };
}
template<typename T, typename F> inline auto foldr_f(T init, F func) {
return [&init, &func](auto &obj) {
return foldr_f(obj, move(init), move(func));
};
}
template<typename T, typename F, typename R>
struct MapRange: InputRange<