Squashed 'third_party/boostorg/utility/' content from commit ebe4429
Change-Id: I8e6ee78273db31df18f99d29034f855ccc064551
git-subtree-dir: third_party/boostorg/utility
git-subtree-split: ebe44296ca698e333a09e8268ea8ccedb3886c4d
diff --git a/include/boost/utility/string_view.hpp b/include/boost/utility/string_view.hpp
new file mode 100644
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+++ b/include/boost/utility/string_view.hpp
@@ -0,0 +1,705 @@
+/*
+ Copyright (c) Marshall Clow 2012-2015.
+ Copyright (c) Beman Dawes 2015
+
+ Distributed under the Boost Software License, Version 1.0. (See accompanying
+ file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+ For more information, see http://www.boost.org
+
+ Based on the StringRef implementation in LLVM (http://llvm.org) and
+ N3422 by Jeffrey Yasskin
+ http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3442.html
+ Updated July 2015 to reflect the Library Fundamentals TS
+ http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4480.html
+*/
+
+#ifndef BOOST_STRING_VIEW_HPP
+#define BOOST_STRING_VIEW_HPP
+
+#include <boost/config.hpp>
+#include <boost/detail/workaround.hpp>
+#include <boost/utility/string_view_fwd.hpp>
+#include <boost/throw_exception.hpp>
+
+#include <cstddef>
+#include <stdexcept>
+#include <algorithm>
+#include <iterator>
+#include <string>
+#include <cstring>
+#include <iosfwd>
+
+#if defined(BOOST_NO_CXX11_DEFAULTED_FUNCTIONS) || (defined(BOOST_GCC) && ((BOOST_GCC+0) / 100) <= 406)
+// GCC 4.6 cannot handle a defaulted function with noexcept specifier
+#define BOOST_STRING_VIEW_NO_CXX11_DEFAULTED_NOEXCEPT_FUNCTIONS
+#endif
+
+namespace boost {
+
+ namespace detail {
+ // A helper functor because sometimes we don't have lambdas
+ template <typename charT, typename traits>
+ class string_view_traits_eq {
+ public:
+ string_view_traits_eq ( charT ch ) : ch_(ch) {}
+ bool operator()( charT val ) const { return traits::eq (ch_, val); }
+ charT ch_;
+ };
+ }
+
+ template<typename charT, typename traits> // traits defaulted in string_view_fwd.hpp
+ class basic_string_view {
+ public:
+ // types
+ typedef traits traits_type;
+ typedef charT value_type;
+ typedef charT* pointer;
+ typedef const charT* const_pointer;
+ typedef charT& reference;
+ typedef const charT& const_reference;
+ typedef const_pointer const_iterator; // impl-defined
+ typedef const_iterator iterator;
+ typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
+ typedef const_reverse_iterator reverse_iterator;
+ typedef std::size_t size_type;
+ typedef std::ptrdiff_t difference_type;
+ static BOOST_CONSTEXPR_OR_CONST size_type npos = size_type(-1);
+
+ // construct/copy
+ BOOST_CONSTEXPR basic_string_view() BOOST_NOEXCEPT
+ : ptr_(NULL), len_(0) {}
+
+ // by defaulting these functions, basic_string_ref becomes
+ // trivially copy/move constructible.
+ BOOST_CONSTEXPR basic_string_view(const basic_string_view &rhs) BOOST_NOEXCEPT
+#ifndef BOOST_STRING_VIEW_NO_CXX11_DEFAULTED_NOEXCEPT_FUNCTIONS
+ = default;
+#else
+ : ptr_(rhs.ptr_), len_(rhs.len_) {}
+#endif
+
+ basic_string_view& operator=(const basic_string_view &rhs) BOOST_NOEXCEPT
+#ifndef BOOST_STRING_VIEW_NO_CXX11_DEFAULTED_NOEXCEPT_FUNCTIONS
+ = default;
+#else
+ {
+ ptr_ = rhs.ptr_;
+ len_ = rhs.len_;
+ return *this;
+ }
+#endif
+
+ template<typename Allocator>
+ basic_string_view(const std::basic_string<charT, traits, Allocator>& str) BOOST_NOEXCEPT
+ : ptr_(str.data()), len_(str.length()) {}
+
+// #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && !defined(BOOST_NO_CXX11_DELETED_FUNCTIONS)
+// // Constructing a string_view from a temporary string is a bad idea
+// template<typename Allocator>
+// basic_string_view( std::basic_string<charT, traits, Allocator>&&)
+// = delete;
+// #endif
+
+ BOOST_CONSTEXPR basic_string_view(const charT* str)
+ : ptr_(str), len_(traits::length(str)) {}
+
+ BOOST_CONSTEXPR basic_string_view(const charT* str, size_type len)
+ : ptr_(str), len_(len) {}
+
+ // iterators
+ BOOST_CONSTEXPR const_iterator begin() const BOOST_NOEXCEPT { return ptr_; }
+ BOOST_CONSTEXPR const_iterator cbegin() const BOOST_NOEXCEPT { return ptr_; }
+ BOOST_CONSTEXPR const_iterator end() const BOOST_NOEXCEPT { return ptr_ + len_; }
+ BOOST_CONSTEXPR const_iterator cend() const BOOST_NOEXCEPT { return ptr_ + len_; }
+ const_reverse_iterator rbegin() const BOOST_NOEXCEPT { return const_reverse_iterator(end()); }
+ const_reverse_iterator crbegin() const BOOST_NOEXCEPT { return const_reverse_iterator(end()); }
+ const_reverse_iterator rend() const BOOST_NOEXCEPT { return const_reverse_iterator(begin()); }
+ const_reverse_iterator crend() const BOOST_NOEXCEPT { return const_reverse_iterator(begin()); }
+
+ // capacity
+ BOOST_CONSTEXPR size_type size() const BOOST_NOEXCEPT { return len_; }
+ BOOST_CONSTEXPR size_type length() const BOOST_NOEXCEPT { return len_; }
+ BOOST_CONSTEXPR size_type max_size() const BOOST_NOEXCEPT { return len_; }
+ BOOST_CONSTEXPR bool empty() const BOOST_NOEXCEPT { return len_ == 0; }
+
+ // element access
+ BOOST_CONSTEXPR const_reference operator[](size_type pos) const BOOST_NOEXCEPT { return ptr_[pos]; }
+
+ BOOST_CONSTEXPR const_reference at(size_t pos) const {
+ return pos >= len_ ? BOOST_THROW_EXCEPTION(std::out_of_range("boost::string_view::at")), ptr_[0] : ptr_[pos];
+ }
+
+ BOOST_CONSTEXPR const_reference front() const { return ptr_[0]; }
+ BOOST_CONSTEXPR const_reference back() const { return ptr_[len_-1]; }
+ BOOST_CONSTEXPR const_pointer data() const BOOST_NOEXCEPT { return ptr_; }
+
+ // modifiers
+ void clear() BOOST_NOEXCEPT { len_ = 0; } // Boost extension
+
+ BOOST_CXX14_CONSTEXPR void remove_prefix(size_type n) {
+ if ( n > len_ )
+ n = len_;
+ ptr_ += n;
+ len_ -= n;
+ }
+
+ BOOST_CXX14_CONSTEXPR void remove_suffix(size_type n) {
+ if ( n > len_ )
+ n = len_;
+ len_ -= n;
+ }
+
+ BOOST_CXX14_CONSTEXPR void swap(basic_string_view& s) BOOST_NOEXCEPT {
+ std::swap(ptr_, s.ptr_);
+ std::swap(len_, s.len_);
+ }
+
+ // basic_string_view string operations
+#ifndef BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS
+ template<typename Allocator>
+ explicit operator std::basic_string<charT, traits, Allocator>() const {
+ return std::basic_string<charT, traits, Allocator>(begin(), end());
+ }
+#endif
+
+#ifndef BOOST_NO_CXX11_FUNCTION_TEMPLATE_DEFAULT_ARGS
+ template<typename Allocator = std::allocator<charT> >
+ std::basic_string<charT, traits, Allocator> to_string(const Allocator& a = Allocator()) const {
+ return std::basic_string<charT, traits, Allocator>(begin(), end(), a);
+ }
+#else
+ std::basic_string<charT, traits> to_string() const {
+ return std::basic_string<charT, traits>(begin(), end());
+ }
+
+ template<typename Allocator>
+ std::basic_string<charT, traits, Allocator> to_string(const Allocator& a) const {
+ return std::basic_string<charT, traits, Allocator>(begin(), end(), a);
+ }
+#endif
+
+ size_type copy(charT* s, size_type n, size_type pos=0) const {
+ if (pos > size())
+ BOOST_THROW_EXCEPTION(std::out_of_range("string_view::copy" ));
+ size_type rlen = (std::min)(n, len_ - pos);
+ traits_type::copy(s, data() + pos, rlen);
+ return rlen;
+ }
+
+ BOOST_CXX14_CONSTEXPR basic_string_view substr(size_type pos, size_type n=npos) const {
+ if ( pos > size())
+ BOOST_THROW_EXCEPTION( std::out_of_range ( "string_view::substr" ) );
+ return basic_string_view(data() + pos, (std::min)(size() - pos, n));
+ }
+
+ BOOST_CXX14_CONSTEXPR int compare(basic_string_view x) const BOOST_NOEXCEPT {
+ const int cmp = traits::compare(ptr_, x.ptr_, (std::min)(len_, x.len_));
+ return cmp != 0 ? cmp : (len_ == x.len_ ? 0 : len_ < x.len_ ? -1 : 1);
+ }
+
+ BOOST_CXX14_CONSTEXPR int compare(size_type pos1, size_type n1, basic_string_view x)
+ const BOOST_NOEXCEPT {
+ return substr(pos1, n1).compare(x);
+ }
+
+ BOOST_CXX14_CONSTEXPR int compare(size_type pos1, size_type n1,
+ basic_string_view x, size_type pos2, size_type n2) const {
+ return substr(pos1, n1).compare(x.substr(pos2, n2));
+ }
+
+ BOOST_CXX14_CONSTEXPR int compare(const charT* x) const {
+ return compare(basic_string_view(x));
+ }
+
+ BOOST_CXX14_CONSTEXPR int compare(size_type pos1, size_type n1, const charT* x) const {
+ return substr(pos1, n1).compare(basic_string_view(x));
+ }
+
+ BOOST_CXX14_CONSTEXPR int compare(size_type pos1, size_type n1,
+ const charT* x, size_type n2) const {
+ return substr(pos1, n1).compare(basic_string_view(x, n2));
+ }
+
+ // Searches
+ BOOST_CONSTEXPR bool starts_with(charT c) const BOOST_NOEXCEPT { // Boost extension
+ return !empty() && traits::eq(c, front());
+ }
+
+ BOOST_CONSTEXPR bool starts_with(basic_string_view x) const BOOST_NOEXCEPT { // Boost extension
+ return len_ >= x.len_ && traits::compare(ptr_, x.ptr_, x.len_) == 0;
+ }
+
+ BOOST_CONSTEXPR bool ends_with(charT c) const BOOST_NOEXCEPT { // Boost extension
+ return !empty() && traits::eq(c, back());
+ }
+
+ BOOST_CONSTEXPR bool ends_with(basic_string_view x) const BOOST_NOEXCEPT { // Boost extension
+ return len_ >= x.len_ &&
+ traits::compare(ptr_ + len_ - x.len_, x.ptr_, x.len_) == 0;
+ }
+
+ // find
+ BOOST_CXX14_CONSTEXPR size_type find(basic_string_view s, size_type pos = 0) const BOOST_NOEXCEPT {
+ if (pos > size())
+ return npos;
+ if (s.empty())
+ return pos;
+ if (s.size() > size() - pos)
+ return npos;
+ const charT* cur = ptr_ + pos;
+ const charT* last = cend() - s.size() + 1;
+ for (; cur != last ; ++cur) {
+ cur = traits::find(cur, last - cur, s[0]);
+ if (!cur)
+ return npos;
+ if (traits::compare(cur, s.cbegin(), s.size()) == 0)
+ return cur - ptr_;
+ }
+ return npos;
+ }
+ BOOST_CXX14_CONSTEXPR size_type find(charT c, size_type pos = 0) const BOOST_NOEXCEPT {
+ if (pos > size())
+ return npos;
+ const charT* ret_ptr = traits::find(ptr_ + pos, len_ - pos, c);
+ if (ret_ptr)
+ return ret_ptr - ptr_;
+ return npos;
+ }
+ BOOST_CXX14_CONSTEXPR size_type find(const charT* s, size_type pos, size_type n) const BOOST_NOEXCEPT
+ { return find(basic_string_view(s, n), pos); }
+ BOOST_CXX14_CONSTEXPR size_type find(const charT* s, size_type pos = 0) const BOOST_NOEXCEPT
+ { return find(basic_string_view(s), pos); }
+
+ // rfind
+ BOOST_CXX14_CONSTEXPR size_type rfind(basic_string_view s, size_type pos = npos) const BOOST_NOEXCEPT {
+ if (len_ < s.len_)
+ return npos;
+ if (pos > len_ - s.len_)
+ pos = len_ - s.len_;
+ if (s.len_ == 0u) // an empty string is always found
+ return pos;
+ for (const charT* cur = ptr_ + pos; ; --cur) {
+ if (traits::compare(cur, s.ptr_, s.len_) == 0)
+ return cur - ptr_;
+ if (cur == ptr_)
+ return npos;
+ };
+ }
+ BOOST_CXX14_CONSTEXPR size_type rfind(charT c, size_type pos = npos) const BOOST_NOEXCEPT
+ { return rfind(basic_string_view(&c, 1), pos); }
+ BOOST_CXX14_CONSTEXPR size_type rfind(const charT* s, size_type pos, size_type n) const BOOST_NOEXCEPT
+ { return rfind(basic_string_view(s, n), pos); }
+ BOOST_CXX14_CONSTEXPR size_type rfind(const charT* s, size_type pos = npos) const BOOST_NOEXCEPT
+ { return rfind(basic_string_view(s), pos); }
+
+ // find_first_of
+ BOOST_CXX14_CONSTEXPR size_type find_first_of(basic_string_view s, size_type pos = 0) const BOOST_NOEXCEPT {
+ if (pos >= len_ || s.len_ == 0)
+ return npos;
+ const_iterator iter = std::find_first_of
+ (this->cbegin () + pos, this->cend (), s.cbegin (), s.cend (), traits::eq);
+ return iter == this->cend () ? npos : std::distance ( this->cbegin (), iter );
+ }
+ BOOST_CXX14_CONSTEXPR size_type find_first_of(charT c, size_type pos = 0) const BOOST_NOEXCEPT
+ { return find(c, pos); }
+ BOOST_CXX14_CONSTEXPR size_type find_first_of(const charT* s, size_type pos, size_type n) const BOOST_NOEXCEPT
+ { return find_first_of(basic_string_view(s, n), pos); }
+ BOOST_CXX14_CONSTEXPR size_type find_first_of(const charT* s, size_type pos = 0) const BOOST_NOEXCEPT
+ { return find_first_of(basic_string_view(s), pos); }
+
+ // find_last_of
+ BOOST_CXX14_CONSTEXPR size_type find_last_of(basic_string_view s, size_type pos = npos) const BOOST_NOEXCEPT {
+ if (s.len_ == 0u)
+ return npos;
+ if (pos >= len_)
+ pos = 0;
+ else
+ pos = len_ - (pos+1);
+ const_reverse_iterator iter = std::find_first_of
+ ( this->crbegin () + pos, this->crend (), s.cbegin (), s.cend (), traits::eq );
+ return iter == this->crend () ? npos : reverse_distance ( this->crbegin (), iter);
+ }
+ BOOST_CXX14_CONSTEXPR size_type find_last_of(charT c, size_type pos = npos) const BOOST_NOEXCEPT
+ { return find_last_of(basic_string_view(&c, 1), pos); }
+ BOOST_CXX14_CONSTEXPR size_type find_last_of(const charT* s, size_type pos, size_type n) const BOOST_NOEXCEPT
+ { return find_last_of(basic_string_view(s, n), pos); }
+ BOOST_CXX14_CONSTEXPR size_type find_last_of(const charT* s, size_type pos = npos) const BOOST_NOEXCEPT
+ { return find_last_of(basic_string_view(s), pos); }
+
+ // find_first_not_of
+ BOOST_CXX14_CONSTEXPR size_type find_first_not_of(basic_string_view s, size_type pos = 0) const BOOST_NOEXCEPT {
+ if (pos >= len_)
+ return npos;
+ if (s.len_ == 0)
+ return pos;
+ const_iterator iter = find_not_of ( this->cbegin () + pos, this->cend (), s );
+ return iter == this->cend () ? npos : std::distance ( this->cbegin (), iter );
+ }
+ BOOST_CXX14_CONSTEXPR size_type find_first_not_of(charT c, size_type pos = 0) const BOOST_NOEXCEPT
+ { return find_first_not_of(basic_string_view(&c, 1), pos); }
+ BOOST_CXX14_CONSTEXPR size_type find_first_not_of(const charT* s, size_type pos, size_type n) const BOOST_NOEXCEPT
+ { return find_first_not_of(basic_string_view(s, n), pos); }
+ BOOST_CXX14_CONSTEXPR size_type find_first_not_of(const charT* s, size_type pos = 0) const BOOST_NOEXCEPT
+ { return find_first_not_of(basic_string_view(s), pos); }
+
+ // find_last_not_of
+ BOOST_CXX14_CONSTEXPR size_type find_last_not_of(basic_string_view s, size_type pos = npos) const BOOST_NOEXCEPT {
+ if (pos >= len_)
+ pos = len_ - 1;
+ if (s.len_ == 0u)
+ return pos;
+ pos = len_ - (pos+1);
+ const_reverse_iterator iter = find_not_of ( this->crbegin () + pos, this->crend (), s );
+ return iter == this->crend () ? npos : reverse_distance ( this->crbegin (), iter );
+ }
+ BOOST_CXX14_CONSTEXPR size_type find_last_not_of(charT c, size_type pos = npos) const BOOST_NOEXCEPT
+ { return find_last_not_of(basic_string_view(&c, 1), pos); }
+ BOOST_CXX14_CONSTEXPR size_type find_last_not_of(const charT* s, size_type pos, size_type n) const BOOST_NOEXCEPT
+ { return find_last_not_of(basic_string_view(s, n), pos); }
+ BOOST_CXX14_CONSTEXPR size_type find_last_not_of(const charT* s, size_type pos = npos) const BOOST_NOEXCEPT
+ { return find_last_not_of(basic_string_view(s), pos); }
+
+ private:
+ template <typename r_iter>
+ size_type reverse_distance(r_iter first, r_iter last) const BOOST_NOEXCEPT {
+ // Portability note here: std::distance is not NOEXCEPT, but calling it with a string_view::reverse_iterator will not throw.
+ return len_ - 1 - std::distance ( first, last );
+ }
+
+ template <typename Iterator>
+ Iterator find_not_of(Iterator first, Iterator last, basic_string_view s) const BOOST_NOEXCEPT {
+ for (; first != last ; ++first)
+ if ( 0 == traits::find(s.ptr_, s.len_, *first))
+ return first;
+ return last;
+ }
+
+ const charT *ptr_;
+ std::size_t len_;
+ };
+
+
+// Comparison operators
+// Equality
+ template<typename charT, typename traits>
+ inline BOOST_CXX14_CONSTEXPR bool operator==(basic_string_view<charT, traits> x,
+ basic_string_view<charT, traits> y) BOOST_NOEXCEPT {
+ if (x.size () != y.size ()) return false;
+ return x.compare(y) == 0;
+ }
+
+// Inequality
+ template<typename charT, typename traits>
+ inline BOOST_CXX14_CONSTEXPR bool operator!=(basic_string_view<charT, traits> x,
+ basic_string_view<charT, traits> y) BOOST_NOEXCEPT {
+ if ( x.size () != y.size ()) return true;
+ return x.compare(y) != 0;
+ }
+
+// Less than
+ template<typename charT, typename traits>
+ inline BOOST_CXX14_CONSTEXPR bool operator<(basic_string_view<charT, traits> x,
+ basic_string_view<charT, traits> y) BOOST_NOEXCEPT {
+ return x.compare(y) < 0;
+ }
+
+// Greater than
+ template<typename charT, typename traits>
+ inline BOOST_CXX14_CONSTEXPR bool operator>(basic_string_view<charT, traits> x,
+ basic_string_view<charT, traits> y) BOOST_NOEXCEPT {
+ return x.compare(y) > 0;
+ }
+
+// Less than or equal to
+ template<typename charT, typename traits>
+ inline BOOST_CXX14_CONSTEXPR bool operator<=(basic_string_view<charT, traits> x,
+ basic_string_view<charT, traits> y) BOOST_NOEXCEPT {
+ return x.compare(y) <= 0;
+ }
+
+// Greater than or equal to
+ template<typename charT, typename traits>
+ inline BOOST_CXX14_CONSTEXPR bool operator>=(basic_string_view<charT, traits> x,
+ basic_string_view<charT, traits> y) BOOST_NOEXCEPT {
+ return x.compare(y) >= 0;
+ }
+
+// "sufficient additional overloads of comparison functions"
+ template<typename charT, typename traits, typename Allocator>
+ inline BOOST_CXX14_CONSTEXPR bool operator==(basic_string_view<charT, traits> x,
+ const std::basic_string<charT, traits, Allocator> & y) BOOST_NOEXCEPT {
+ return x == basic_string_view<charT, traits>(y);
+ }
+
+ template<typename charT, typename traits, typename Allocator>
+ inline BOOST_CXX14_CONSTEXPR bool operator==(const std::basic_string<charT, traits, Allocator> & x,
+ basic_string_view<charT, traits> y) BOOST_NOEXCEPT {
+ return basic_string_view<charT, traits>(x) == y;
+ }
+
+ template<typename charT, typename traits>
+ inline BOOST_CXX14_CONSTEXPR bool operator==(basic_string_view<charT, traits> x,
+ const charT * y) BOOST_NOEXCEPT {
+ return x == basic_string_view<charT, traits>(y);
+ }
+
+ template<typename charT, typename traits>
+ inline BOOST_CXX14_CONSTEXPR bool operator==(const charT * x,
+ basic_string_view<charT, traits> y) BOOST_NOEXCEPT {
+ return basic_string_view<charT, traits>(x) == y;
+ }
+
+ template<typename charT, typename traits, typename Allocator>
+ inline BOOST_CXX14_CONSTEXPR bool operator!=(basic_string_view<charT, traits> x,
+ const std::basic_string<charT, traits, Allocator> & y) BOOST_NOEXCEPT {
+ return x != basic_string_view<charT, traits>(y);
+ }
+
+ template<typename charT, typename traits, typename Allocator>
+ inline BOOST_CXX14_CONSTEXPR bool operator!=(const std::basic_string<charT, traits, Allocator> & x,
+ basic_string_view<charT, traits> y) BOOST_NOEXCEPT {
+ return basic_string_view<charT, traits>(x) != y;
+ }
+
+ template<typename charT, typename traits>
+ inline BOOST_CXX14_CONSTEXPR bool operator!=(basic_string_view<charT, traits> x,
+ const charT * y) BOOST_NOEXCEPT {
+ return x != basic_string_view<charT, traits>(y);
+ }
+
+ template<typename charT, typename traits>
+ inline BOOST_CXX14_CONSTEXPR bool operator!=(const charT * x,
+ basic_string_view<charT, traits> y) BOOST_NOEXCEPT {
+ return basic_string_view<charT, traits>(x) != y;
+ }
+
+ template<typename charT, typename traits, typename Allocator>
+ inline BOOST_CXX14_CONSTEXPR bool operator<(basic_string_view<charT, traits> x,
+ const std::basic_string<charT, traits, Allocator> & y) BOOST_NOEXCEPT {
+ return x < basic_string_view<charT, traits>(y);
+ }
+
+ template<typename charT, typename traits, typename Allocator>
+ inline BOOST_CXX14_CONSTEXPR bool operator<(const std::basic_string<charT, traits, Allocator> & x,
+ basic_string_view<charT, traits> y) BOOST_NOEXCEPT {
+ return basic_string_view<charT, traits>(x) < y;
+ }
+
+ template<typename charT, typename traits>
+ inline BOOST_CXX14_CONSTEXPR bool operator<(basic_string_view<charT, traits> x,
+ const charT * y) BOOST_NOEXCEPT {
+ return x < basic_string_view<charT, traits>(y);
+ }
+
+ template<typename charT, typename traits>
+ inline BOOST_CXX14_CONSTEXPR bool operator<(const charT * x,
+ basic_string_view<charT, traits> y) BOOST_NOEXCEPT {
+ return basic_string_view<charT, traits>(x) < y;
+ }
+
+ template<typename charT, typename traits, typename Allocator>
+ inline BOOST_CXX14_CONSTEXPR bool operator>(basic_string_view<charT, traits> x,
+ const std::basic_string<charT, traits, Allocator> & y) BOOST_NOEXCEPT {
+ return x > basic_string_view<charT, traits>(y);
+ }
+
+ template<typename charT, typename traits, typename Allocator>
+ inline BOOST_CXX14_CONSTEXPR bool operator>(const std::basic_string<charT, traits, Allocator> & x,
+ basic_string_view<charT, traits> y) BOOST_NOEXCEPT {
+ return basic_string_view<charT, traits>(x) > y;
+ }
+
+ template<typename charT, typename traits>
+ inline BOOST_CXX14_CONSTEXPR bool operator>(basic_string_view<charT, traits> x,
+ const charT * y) BOOST_NOEXCEPT {
+ return x > basic_string_view<charT, traits>(y);
+ }
+
+ template<typename charT, typename traits>
+ inline BOOST_CXX14_CONSTEXPR bool operator>(const charT * x,
+ basic_string_view<charT, traits> y) BOOST_NOEXCEPT {
+ return basic_string_view<charT, traits>(x) > y;
+ }
+
+ template<typename charT, typename traits, typename Allocator>
+ inline BOOST_CXX14_CONSTEXPR bool operator<=(basic_string_view<charT, traits> x,
+ const std::basic_string<charT, traits, Allocator> & y) BOOST_NOEXCEPT {
+ return x <= basic_string_view<charT, traits>(y);
+ }
+
+ template<typename charT, typename traits, typename Allocator>
+ inline BOOST_CXX14_CONSTEXPR bool operator<=(const std::basic_string<charT, traits, Allocator> & x,
+ basic_string_view<charT, traits> y) BOOST_NOEXCEPT {
+ return basic_string_view<charT, traits>(x) <= y;
+ }
+
+ template<typename charT, typename traits>
+ inline BOOST_CXX14_CONSTEXPR bool operator<=(basic_string_view<charT, traits> x,
+ const charT * y) BOOST_NOEXCEPT {
+ return x <= basic_string_view<charT, traits>(y);
+ }
+
+ template<typename charT, typename traits>
+ inline BOOST_CXX14_CONSTEXPR bool operator<=(const charT * x,
+ basic_string_view<charT, traits> y) BOOST_NOEXCEPT {
+ return basic_string_view<charT, traits>(x) <= y;
+ }
+
+ template<typename charT, typename traits, typename Allocator>
+ inline BOOST_CXX14_CONSTEXPR bool operator>=(basic_string_view<charT, traits> x,
+ const std::basic_string<charT, traits, Allocator> & y) BOOST_NOEXCEPT {
+ return x >= basic_string_view<charT, traits>(y);
+ }
+
+ template<typename charT, typename traits, typename Allocator>
+ inline BOOST_CXX14_CONSTEXPR bool operator>=(const std::basic_string<charT, traits, Allocator> & x,
+ basic_string_view<charT, traits> y) BOOST_NOEXCEPT {
+ return basic_string_view<charT, traits>(x) >= y;
+ }
+
+ template<typename charT, typename traits>
+ inline BOOST_CXX14_CONSTEXPR bool operator>=(basic_string_view<charT, traits> x,
+ const charT * y) BOOST_NOEXCEPT {
+ return x >= basic_string_view<charT, traits>(y);
+ }
+
+ template<typename charT, typename traits>
+ inline BOOST_CXX14_CONSTEXPR bool operator>=(const charT * x,
+ basic_string_view<charT, traits> y) BOOST_NOEXCEPT {
+ return basic_string_view<charT, traits>(x) >= y;
+ }
+
+ namespace detail {
+
+ template<class charT, class traits>
+ inline void sv_insert_fill_chars(std::basic_ostream<charT, traits>& os, std::size_t n) {
+ enum { chunk_size = 8 };
+ charT fill_chars[chunk_size];
+ std::fill_n(fill_chars, static_cast< std::size_t >(chunk_size), os.fill());
+ for (; n >= chunk_size && os.good(); n -= chunk_size)
+ os.write(fill_chars, static_cast< std::size_t >(chunk_size));
+ if (n > 0 && os.good())
+ os.write(fill_chars, n);
+ }
+
+ template<class charT, class traits>
+ void sv_insert_aligned(std::basic_ostream<charT, traits>& os, const basic_string_view<charT,traits>& str) {
+ const std::size_t size = str.size();
+ const std::size_t alignment_size = static_cast< std::size_t >(os.width()) - size;
+ const bool align_left = (os.flags() & std::basic_ostream<charT, traits>::adjustfield) == std::basic_ostream<charT, traits>::left;
+ if (!align_left) {
+ detail::sv_insert_fill_chars(os, alignment_size);
+ if (os.good())
+ os.write(str.data(), size);
+ }
+ else {
+ os.write(str.data(), size);
+ if (os.good())
+ detail::sv_insert_fill_chars(os, alignment_size);
+ }
+ }
+
+ } // namespace detail
+
+ // Inserter
+ template<class charT, class traits>
+ inline std::basic_ostream<charT, traits>&
+ operator<<(std::basic_ostream<charT, traits>& os,
+ const basic_string_view<charT,traits>& str) {
+ if (os.good()) {
+ const std::size_t size = str.size();
+ const std::size_t w = static_cast< std::size_t >(os.width());
+ if (w <= size)
+ os.write(str.data(), size);
+ else
+ detail::sv_insert_aligned(os, str);
+ os.width(0);
+ }
+ return os;
+ }
+
+#if 0
+ // numeric conversions
+ //
+ // These are short-term implementations.
+ // In a production environment, I would rather avoid the copying.
+ //
+ inline int stoi (string_view str, size_t* idx=0, int base=10) {
+ return std::stoi ( std::string(str), idx, base );
+ }
+
+ inline long stol (string_view str, size_t* idx=0, int base=10) {
+ return std::stol ( std::string(str), idx, base );
+ }
+
+ inline unsigned long stoul (string_view str, size_t* idx=0, int base=10) {
+ return std::stoul ( std::string(str), idx, base );
+ }
+
+ inline long long stoll (string_view str, size_t* idx=0, int base=10) {
+ return std::stoll ( std::string(str), idx, base );
+ }
+
+ inline unsigned long long stoull (string_view str, size_t* idx=0, int base=10) {
+ return std::stoull ( std::string(str), idx, base );
+ }
+
+ inline float stof (string_view str, size_t* idx=0) {
+ return std::stof ( std::string(str), idx );
+ }
+
+ inline double stod (string_view str, size_t* idx=0) {
+ return std::stod ( std::string(str), idx );
+ }
+
+ inline long double stold (string_view str, size_t* idx=0) {
+ return std::stold ( std::string(str), idx );
+ }
+
+ inline int stoi (wstring_view str, size_t* idx=0, int base=10) {
+ return std::stoi ( std::wstring(str), idx, base );
+ }
+
+ inline long stol (wstring_view str, size_t* idx=0, int base=10) {
+ return std::stol ( std::wstring(str), idx, base );
+ }
+
+ inline unsigned long stoul (wstring_view str, size_t* idx=0, int base=10) {
+ return std::stoul ( std::wstring(str), idx, base );
+ }
+
+ inline long long stoll (wstring_view str, size_t* idx=0, int base=10) {
+ return std::stoll ( std::wstring(str), idx, base );
+ }
+
+ inline unsigned long long stoull (wstring_view str, size_t* idx=0, int base=10) {
+ return std::stoull ( std::wstring(str), idx, base );
+ }
+
+ inline float stof (wstring_view str, size_t* idx=0) {
+ return std::stof ( std::wstring(str), idx );
+ }
+
+ inline double stod (wstring_view str, size_t* idx=0) {
+ return std::stod ( std::wstring(str), idx );
+ }
+
+ inline long double stold (wstring_view str, size_t* idx=0) {
+ return std::stold ( std::wstring(str), idx );
+ }
+#endif
+
+}
+
+#if 0
+namespace std {
+ // Hashing
+ template<> struct hash<boost::string_view>;
+ template<> struct hash<boost::u16string_view>;
+ template<> struct hash<boost::u32string_view>;
+ template<> struct hash<boost::wstring_view>;
+}
+#endif
+
+#endif