/*
- * Copyright 2013 Facebook, Inc.
+ * Copyright 2014 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include <memory>
#include <limits>
#include <type_traits>
-
+#include <functional>
+
+#include <folly/Portability.h>
+
+// libc++ doesn't provide this header, nor does msvc
+#ifdef FOLLY_HAVE_BITS_CXXCONFIG_H
+// This file appears in two locations: inside fbcode and in the
+// libstdc++ source code (when embedding fbstring as std::string).
+// To aid in this schizophrenic use, two macros are defined in
+// c++config.h:
+// _LIBSTDCXX_FBSTRING - Set inside libstdc++. This is useful to
+// gate use inside fbcode v. libstdc++
#include <bits/c++config.h>
+#endif
#include <boost/type_traits.hpp>
#include <boost/mpl/and.hpp>
* although that is not guaranteed by the standard.
*/
-namespace std {
+FOLLY_NAMESPACE_STD_BEGIN
template <class T, class U>
struct pair;
template <class T>
class shared_ptr;
-}
+FOLLY_NAMESPACE_STD_END
namespace boost {
bool less_than_impl(
typename std::enable_if<
(rhs <= std::numeric_limits<LHS>::max()
- && rhs >= std::numeric_limits<LHS>::min()),
+ && rhs > std::numeric_limits<LHS>::min()),
LHS
>::type const lhs
) {
template <typename RHS, RHS rhs, typename LHS>
bool less_than_impl(
typename std::enable_if<
- (rhs < std::numeric_limits<LHS>::min()),
+ (rhs <= std::numeric_limits<LHS>::min()),
LHS
>::type const
) {
template <typename T>
constexpr bool is_non_positive(T x) { return !x || folly::is_negative(x); }
+// same as `x > 0`
+template <typename T>
+constexpr bool is_positive(T x) { return !is_non_positive(x); }
+
+// same as `x >= 0`
+template <typename T>
+constexpr bool is_non_negative(T x) {
+ return !x || is_positive(x);
+}
+
template <typename RHS, RHS rhs, typename LHS>
bool less_than(LHS const lhs) {
return detail::less_than_impl<
FOLLY_ASSUME_FBVECTOR_COMPATIBLE_2(std::vector);
FOLLY_ASSUME_FBVECTOR_COMPATIBLE_2(std::list);
FOLLY_ASSUME_FBVECTOR_COMPATIBLE_2(std::deque);
-FOLLY_ASSUME_FBVECTOR_COMPATIBLE_4(std::map);
-FOLLY_ASSUME_FBVECTOR_COMPATIBLE_3(std::set);
FOLLY_ASSUME_FBVECTOR_COMPATIBLE_2(std::unique_ptr);
FOLLY_ASSUME_FBVECTOR_COMPATIBLE_1(std::shared_ptr);
FOLLY_ASSUME_FBVECTOR_COMPATIBLE_1(std::function);