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diff --git a/boost/utility/string_view.hpp b/boost/utility/string_view.hpp new file mode 100644 index 0000000000..9de32ccc56 --- /dev/null +++ b/boost/utility/string_view.hpp @@ -0,0 +1,670 @@ +/* + © Copyright (c) Marshall Clow 2012-2015. + © Copyright 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> + +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) {} + + BOOST_CONSTEXPR basic_string_view(const basic_string_view &rhs) BOOST_NOEXCEPT + : ptr_(rhs.ptr_), len_(rhs.len_) {} + + basic_string_view& operator=(const basic_string_view &rhs) BOOST_NOEXCEPT { + ptr_ = rhs.ptr_; + len_ = rhs.len_; + return *this; + } + + template<typename Allocator> + basic_string_view(const std::basic_string<charT, traits, + Allocator>& str) BOOST_NOEXCEPT + : ptr_(str.data()), len_(str.length()) {} + + 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_[pos]; +// if ( pos >= len_ ) +// BOOST_THROW_EXCEPTION( std::out_of_range ( "boost::string_view::at" ) ); +// return 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> 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()); + } +#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); + // use std::copy(begin() + pos, begin() + pos + rlen, s) rather than + // std::copy_n(begin() + pos, rlen, s) to support pre-C++11 standard libraries + std::copy(begin() + pos, begin() + pos + rlen, s); + 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" ) ); + if (n == npos || pos + n > size()) + n = size () - pos; + return basic_string_view(data() + 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; + const_iterator iter = std::search(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(charT c, size_type pos = 0) const BOOST_NOEXCEPT + { return find(basic_string_view(&c, 1), pos); } + 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_first_of(basic_string_view(&c, 1), 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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::insert_fill_chars(os, alignment_size); + if (os.good()) + os.write(str.data(), size); + } + else { + os.write(str.data(), size); + if (os.good()) + detail::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::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 |