#define LLVM_ADT_STLEXTRAS_H
#include "llvm/Support/Compiler.h"
+#include <algorithm> // for std::all_of
#include <cassert>
#include <cstddef> // for std::size_t
#include <cstdlib> // for qsort
typedef void reference; // Can't modify value returned by fn
typedef RootIt iterator_type;
- typedef mapped_iterator<RootIt, UnaryFunc> _Self;
inline const RootIt &getCurrent() const { return current; }
inline const UnaryFunc &getFunc() const { return Fn; }
return Fn(*current); // little change
}
- _Self& operator++() { ++current; return *this; }
- _Self& operator--() { --current; return *this; }
- _Self operator++(int) { _Self __tmp = *this; ++current; return __tmp; }
- _Self operator--(int) { _Self __tmp = *this; --current; return __tmp; }
- _Self operator+ (difference_type n) const {
- return _Self(current + n, Fn);
+ mapped_iterator &operator++() {
+ ++current;
+ return *this;
}
- _Self& operator+= (difference_type n) { current += n; return *this; }
- _Self operator- (difference_type n) const {
- return _Self(current - n, Fn);
+ mapped_iterator &operator--() {
+ --current;
+ return *this;
+ }
+ mapped_iterator operator++(int) {
+ mapped_iterator __tmp = *this;
+ ++current;
+ return __tmp;
+ }
+ mapped_iterator operator--(int) {
+ mapped_iterator __tmp = *this;
+ --current;
+ return __tmp;
+ }
+ mapped_iterator operator+(difference_type n) const {
+ return mapped_iterator(current + n, Fn);
+ }
+ mapped_iterator &operator+=(difference_type n) {
+ current += n;
+ return *this;
+ }
+ mapped_iterator operator-(difference_type n) const {
+ return mapped_iterator(current - n, Fn);
+ }
+ mapped_iterator &operator-=(difference_type n) {
+ current -= n;
+ return *this;
}
- _Self& operator-= (difference_type n) { current -= n; return *this; }
reference operator[](difference_type n) const { return *(*this + n); }
- inline bool operator!=(const _Self &X) const { return !operator==(X); }
- inline bool operator==(const _Self &X) const { return current == X.current; }
- inline bool operator< (const _Self &X) const { return current < X.current; }
+ bool operator!=(const mapped_iterator &X) const { return !operator==(X); }
+ bool operator==(const mapped_iterator &X) const {
+ return current == X.current;
+ }
+ bool operator<(const mapped_iterator &X) const { return current < X.current; }
- inline difference_type operator-(const _Self &X) const {
+ difference_type operator-(const mapped_iterator &X) const {
return current - X.current;
}
};
-template <class _Iterator, class Func>
-inline mapped_iterator<_Iterator, Func>
-operator+(typename mapped_iterator<_Iterator, Func>::difference_type N,
- const mapped_iterator<_Iterator, Func>& X) {
- return mapped_iterator<_Iterator, Func>(X.getCurrent() - N, X.getFunc());
+template <class Iterator, class Func>
+inline mapped_iterator<Iterator, Func>
+operator+(typename mapped_iterator<Iterator, Func>::difference_type N,
+ const mapped_iterator<Iterator, Func> &X) {
+ return mapped_iterator<Iterator, Func>(X.getCurrent() - N, X.getFunc());
}
return mapped_iterator<ItTy, FuncTy>(I, F);
}
+/// \brief Metafunction to determine if type T has a member called rbegin().
+template <typename T> struct has_rbegin {
+ template <typename U> static char(&f(const U &, decltype(&U::rbegin)))[1];
+ static char(&f(...))[2];
+ const static bool value = sizeof(f(std::declval<T>(), nullptr)) == 1;
+};
+
+// Returns an iterator_range over the given container which iterates in reverse.
+// Note that the container must have rbegin()/rend() methods for this to work.
+template <typename ContainerTy>
+auto reverse(ContainerTy &&C,
+ typename std::enable_if<has_rbegin<ContainerTy>::value>::type * =
+ nullptr) -> decltype(make_range(C.rbegin(), C.rend())) {
+ return make_range(C.rbegin(), C.rend());
+}
+
+// Returns a std::reverse_iterator wrapped around the given iterator.
+template <typename IteratorTy>
+std::reverse_iterator<IteratorTy> make_reverse_iterator(IteratorTy It) {
+ return std::reverse_iterator<IteratorTy>(It);
+}
+
+// Returns an iterator_range over the given container which iterates in reverse.
+// Note that the container must have begin()/end() methods which return
+// bidirectional iterators for this to work.
+template <typename ContainerTy>
+auto reverse(
+ ContainerTy &&C,
+ typename std::enable_if<!has_rbegin<ContainerTy>::value>::type * = nullptr)
+ -> decltype(make_range(llvm::make_reverse_iterator(std::end(C)),
+ llvm::make_reverse_iterator(std::begin(C)))) {
+ return make_range(llvm::make_reverse_iterator(std::end(C)),
+ llvm::make_reverse_iterator(std::begin(C)));
+}
+
//===----------------------------------------------------------------------===//
// Extra additions to <utility>
//===----------------------------------------------------------------------===//
/// default to std::less.
template<class IteratorTy>
inline void array_pod_sort(IteratorTy Start, IteratorTy End) {
- // Don't dereference start iterator of empty sequence.
- if (Start == End) return;
- qsort(&*Start, End-Start, sizeof(*Start),
- get_array_pod_sort_comparator(*Start));
+ // Don't inefficiently call qsort with one element or trigger undefined
+ // behavior with an empty sequence.
+ auto NElts = End - Start;
+ if (NElts <= 1) return;
+ qsort(&*Start, NElts, sizeof(*Start), get_array_pod_sort_comparator(*Start));
}
template <class IteratorTy>
int (*Compare)(
const typename std::iterator_traits<IteratorTy>::value_type *,
const typename std::iterator_traits<IteratorTy>::value_type *)) {
- // Don't dereference start iterator of empty sequence.
- if (Start == End) return;
- qsort(&*Start, End - Start, sizeof(*Start),
+ // Don't inefficiently call qsort with one element or trigger undefined
+ // behavior with an empty sequence.
+ auto NElts = End - Start;
+ if (NElts <= 1) return;
+ qsort(&*Start, NElts, sizeof(*Start),
reinterpret_cast<int (*)(const void *, const void *)>(Compare));
}
C.clear();
}
+/// Provide wrappers to std::all_of which take ranges instead of having to pass
+/// being/end explicitly.
+template<typename R, class UnaryPredicate>
+bool all_of(R &&Range, UnaryPredicate &&P) {
+ return std::all_of(Range.begin(), Range.end(),
+ std::forward<UnaryPredicate>(P));
+}
+
//===----------------------------------------------------------------------===//
// Extra additions to <memory>
//===----------------------------------------------------------------------===//
projects / oota-llvm.git / blobdiff