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Diffstat (limited to 'include/inja/string_view.hpp')
| -rw-r--r-- | include/inja/string_view.hpp | 1416 |
1 files changed, 0 insertions, 1416 deletions
diff --git a/include/inja/string_view.hpp b/include/inja/string_view.hpp deleted file mode 100644 index 2bb50c9..0000000 --- a/include/inja/string_view.hpp +++ /dev/null @@ -1,1416 +0,0 @@ -// Copyright 2017-2019 by Martin Moene -// -// string-view lite, a C++17-like string_view for C++98 and later. -// For more information see https://github.com/martinmoene/string-view-lite -// -// Distributed under the Boost Software License, Version 1.0. -// (See accompanying file LICENSE.txt or copy at http://www.boost.org/LICENSE_1_0.txt) - -#pragma once - -#ifndef NONSTD_SV_LITE_H_INCLUDED -#define NONSTD_SV_LITE_H_INCLUDED - -#define string_view_lite_MAJOR 1 -#define string_view_lite_MINOR 4 -#define string_view_lite_PATCH 0 - -#define string_view_lite_VERSION \ - nssv_STRINGIFY(string_view_lite_MAJOR) "." nssv_STRINGIFY(string_view_lite_MINOR) "." nssv_STRINGIFY( \ - string_view_lite_PATCH) - -#define nssv_STRINGIFY(x) nssv_STRINGIFY_(x) -#define nssv_STRINGIFY_(x) #x - -// string-view lite configuration: - -#define nssv_STRING_VIEW_DEFAULT 0 -#define nssv_STRING_VIEW_NONSTD 1 -#define nssv_STRING_VIEW_STD 2 - -#if !defined(nssv_CONFIG_SELECT_STRING_VIEW) -#define nssv_CONFIG_SELECT_STRING_VIEW (nssv_HAVE_STD_STRING_VIEW ? nssv_STRING_VIEW_STD : nssv_STRING_VIEW_NONSTD) -#endif - -#if defined(nssv_CONFIG_SELECT_STD_STRING_VIEW) || defined(nssv_CONFIG_SELECT_NONSTD_STRING_VIEW) -#error nssv_CONFIG_SELECT_STD_STRING_VIEW and nssv_CONFIG_SELECT_NONSTD_STRING_VIEW are deprecated and removed, please use nssv_CONFIG_SELECT_STRING_VIEW=nssv_STRING_VIEW_... -#endif - -#ifndef nssv_CONFIG_STD_SV_OPERATOR -#define nssv_CONFIG_STD_SV_OPERATOR 0 -#endif - -#ifndef nssv_CONFIG_USR_SV_OPERATOR -#define nssv_CONFIG_USR_SV_OPERATOR 1 -#endif - -#ifdef nssv_CONFIG_CONVERSION_STD_STRING -#define nssv_CONFIG_CONVERSION_STD_STRING_CLASS_METHODS nssv_CONFIG_CONVERSION_STD_STRING -#define nssv_CONFIG_CONVERSION_STD_STRING_FREE_FUNCTIONS nssv_CONFIG_CONVERSION_STD_STRING -#endif - -#ifndef nssv_CONFIG_CONVERSION_STD_STRING_CLASS_METHODS -#define nssv_CONFIG_CONVERSION_STD_STRING_CLASS_METHODS 1 -#endif - -#ifndef nssv_CONFIG_CONVERSION_STD_STRING_FREE_FUNCTIONS -#define nssv_CONFIG_CONVERSION_STD_STRING_FREE_FUNCTIONS 1 -#endif - -// Control presence of exception handling (try and auto discover): - -#ifndef nssv_CONFIG_NO_EXCEPTIONS -#if defined(__cpp_exceptions) || defined(__EXCEPTIONS) || defined(_CPPUNWIND) -#define nssv_CONFIG_NO_EXCEPTIONS 0 -#else -#define nssv_CONFIG_NO_EXCEPTIONS 1 -#endif -#endif - -// C++ language version detection (C++20 is speculative): -// Note: VC14.0/1900 (VS2015) lacks too much from C++14. - -#ifndef nssv_CPLUSPLUS -#if defined(_MSVC_LANG) && !defined(__clang__) -#define nssv_CPLUSPLUS (_MSC_VER == 1900 ? 201103L : _MSVC_LANG) -#else -#define nssv_CPLUSPLUS __cplusplus -#endif -#endif - -#define nssv_CPP98_OR_GREATER (nssv_CPLUSPLUS >= 199711L) -#define nssv_CPP11_OR_GREATER (nssv_CPLUSPLUS >= 201103L) -#define nssv_CPP11_OR_GREATER_ (nssv_CPLUSPLUS >= 201103L) -#define nssv_CPP14_OR_GREATER (nssv_CPLUSPLUS >= 201402L) -#define nssv_CPP17_OR_GREATER (nssv_CPLUSPLUS >= 201703L) -#define nssv_CPP20_OR_GREATER (nssv_CPLUSPLUS >= 202000L) - -// use C++17 std::string_view if available and requested: - -#if nssv_CPP17_OR_GREATER && defined(__has_include) -#if __has_include(<string_view> ) -#define nssv_HAVE_STD_STRING_VIEW 1 -#else -#define nssv_HAVE_STD_STRING_VIEW 0 -#endif -#else -#define nssv_HAVE_STD_STRING_VIEW 0 -#endif - -#define nssv_USES_STD_STRING_VIEW \ - ((nssv_CONFIG_SELECT_STRING_VIEW == nssv_STRING_VIEW_STD) || \ - ((nssv_CONFIG_SELECT_STRING_VIEW == nssv_STRING_VIEW_DEFAULT) && nssv_HAVE_STD_STRING_VIEW)) - -#define nssv_HAVE_STARTS_WITH (nssv_CPP20_OR_GREATER || !nssv_USES_STD_STRING_VIEW) -#define nssv_HAVE_ENDS_WITH nssv_HAVE_STARTS_WITH - -// -// Use C++17 std::string_view: -// - -#if nssv_USES_STD_STRING_VIEW - -#include <string_view> - -// Extensions for std::string: - -#if nssv_CONFIG_CONVERSION_STD_STRING_FREE_FUNCTIONS - -namespace nonstd { - -template <class CharT, class Traits, class Allocator = std::allocator<CharT>> -std::basic_string<CharT, Traits, Allocator> to_string(std::basic_string_view<CharT, Traits> v, - Allocator const &a = Allocator()) { - return std::basic_string<CharT, Traits, Allocator>(v.begin(), v.end(), a); -} - -template <class CharT, class Traits, class Allocator> -std::basic_string_view<CharT, Traits> to_string_view(std::basic_string<CharT, Traits, Allocator> const &s) { - return std::basic_string_view<CharT, Traits>(s.data(), s.size()); -} - -// Literal operators sv and _sv: - -#if nssv_CONFIG_STD_SV_OPERATOR - -using namespace std::literals::string_view_literals; - -#endif - -#if nssv_CONFIG_USR_SV_OPERATOR - -inline namespace literals { -inline namespace string_view_literals { - -constexpr std::string_view operator"" _sv(const char *str, size_t len) noexcept // (1) -{ - return std::string_view {str, len}; -} - -constexpr std::u16string_view operator"" _sv(const char16_t *str, size_t len) noexcept // (2) -{ - return std::u16string_view {str, len}; -} - -constexpr std::u32string_view operator"" _sv(const char32_t *str, size_t len) noexcept // (3) -{ - return std::u32string_view {str, len}; -} - -constexpr std::wstring_view operator"" _sv(const wchar_t *str, size_t len) noexcept // (4) -{ - return std::wstring_view {str, len}; -} - -} // namespace string_view_literals -} // namespace literals - -#endif // nssv_CONFIG_USR_SV_OPERATOR - -} // namespace nonstd - -#endif // nssv_CONFIG_CONVERSION_STD_STRING_FREE_FUNCTIONS - -namespace nonstd { - -using std::basic_string_view; -using std::string_view; -using std::u16string_view; -using std::u32string_view; -using std::wstring_view; - -// literal "sv" and "_sv", see above - -using std::operator==; -using std::operator!=; -using std::operator<; -using std::operator<=; -using std::operator>; -using std::operator>=; - -using std::operator<<; - -} // namespace nonstd - -#else // nssv_HAVE_STD_STRING_VIEW - -// -// Before C++17: use string_view lite: -// - -// Compiler versions: -// -// MSVC++ 6.0 _MSC_VER == 1200 (Visual Studio 6.0) -// MSVC++ 7.0 _MSC_VER == 1300 (Visual Studio .NET 2002) -// MSVC++ 7.1 _MSC_VER == 1310 (Visual Studio .NET 2003) -// MSVC++ 8.0 _MSC_VER == 1400 (Visual Studio 2005) -// MSVC++ 9.0 _MSC_VER == 1500 (Visual Studio 2008) -// MSVC++ 10.0 _MSC_VER == 1600 (Visual Studio 2010) -// MSVC++ 11.0 _MSC_VER == 1700 (Visual Studio 2012) -// MSVC++ 12.0 _MSC_VER == 1800 (Visual Studio 2013) -// MSVC++ 14.0 _MSC_VER == 1900 (Visual Studio 2015) -// MSVC++ 14.1 _MSC_VER >= 1910 (Visual Studio 2017) - -#if defined(_MSC_VER) && !defined(__clang__) -#define nssv_COMPILER_MSVC_VER (_MSC_VER) -#define nssv_COMPILER_MSVC_VERSION (_MSC_VER / 10 - 10 * (5 + (_MSC_VER < 1900))) -#else -#define nssv_COMPILER_MSVC_VER 0 -#define nssv_COMPILER_MSVC_VERSION 0 -#endif - -#define nssv_COMPILER_VERSION(major, minor, patch) (10 * (10 * (major) + (minor)) + (patch)) - -#if defined(__clang__) -#define nssv_COMPILER_CLANG_VERSION nssv_COMPILER_VERSION(__clang_major__, __clang_minor__, __clang_patchlevel__) -#else -#define nssv_COMPILER_CLANG_VERSION 0 -#endif - -#if defined(__GNUC__) && !defined(__clang__) -#define nssv_COMPILER_GNUC_VERSION nssv_COMPILER_VERSION(__GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__) -#else -#define nssv_COMPILER_GNUC_VERSION 0 -#endif - -// half-open range [lo..hi): -#define nssv_BETWEEN(v, lo, hi) ((lo) <= (v) && (v) < (hi)) - -// Presence of language and library features: - -#ifdef _HAS_CPP0X -#define nssv_HAS_CPP0X _HAS_CPP0X -#else -#define nssv_HAS_CPP0X 0 -#endif - -// Unless defined otherwise below, consider VC14 as C++11 for variant-lite: - -#if nssv_COMPILER_MSVC_VER >= 1900 -#undef nssv_CPP11_OR_GREATER -#define nssv_CPP11_OR_GREATER 1 -#endif - -#define nssv_CPP11_90 (nssv_CPP11_OR_GREATER_ || nssv_COMPILER_MSVC_VER >= 1500) -#define nssv_CPP11_100 (nssv_CPP11_OR_GREATER_ || nssv_COMPILER_MSVC_VER >= 1600) -#define nssv_CPP11_110 (nssv_CPP11_OR_GREATER_ || nssv_COMPILER_MSVC_VER >= 1700) -#define nssv_CPP11_120 (nssv_CPP11_OR_GREATER_ || nssv_COMPILER_MSVC_VER >= 1800) -#define nssv_CPP11_140 (nssv_CPP11_OR_GREATER_ || nssv_COMPILER_MSVC_VER >= 1900) -#define nssv_CPP11_141 (nssv_CPP11_OR_GREATER_ || nssv_COMPILER_MSVC_VER >= 1910) - -#define nssv_CPP14_000 (nssv_CPP14_OR_GREATER) -#define nssv_CPP17_000 (nssv_CPP17_OR_GREATER) - -// Presence of C++11 language features: - -#define nssv_HAVE_CONSTEXPR_11 nssv_CPP11_140 -#define nssv_HAVE_EXPLICIT_CONVERSION nssv_CPP11_140 -#define nssv_HAVE_INLINE_NAMESPACE nssv_CPP11_140 -#define nssv_HAVE_NOEXCEPT nssv_CPP11_140 -#define nssv_HAVE_NULLPTR nssv_CPP11_100 -#define nssv_HAVE_REF_QUALIFIER nssv_CPP11_140 -#define nssv_HAVE_UNICODE_LITERALS nssv_CPP11_140 -#define nssv_HAVE_USER_DEFINED_LITERALS nssv_CPP11_140 -#define nssv_HAVE_WCHAR16_T nssv_CPP11_100 -#define nssv_HAVE_WCHAR32_T nssv_CPP11_100 - -#if !((nssv_CPP11_OR_GREATER && nssv_COMPILER_CLANG_VERSION) || nssv_BETWEEN(nssv_COMPILER_CLANG_VERSION, 300, 400)) -#define nssv_HAVE_STD_DEFINED_LITERALS nssv_CPP11_140 -#else -#define nssv_HAVE_STD_DEFINED_LITERALS 0 -#endif - -// Presence of C++14 language features: - -#define nssv_HAVE_CONSTEXPR_14 nssv_CPP14_000 - -// Presence of C++17 language features: - -#define nssv_HAVE_NODISCARD nssv_CPP17_000 - -// Presence of C++ library features: - -#define nssv_HAVE_STD_HASH nssv_CPP11_120 - -// C++ feature usage: - -#if nssv_HAVE_CONSTEXPR_11 -#define nssv_constexpr constexpr -#else -#define nssv_constexpr /*constexpr*/ -#endif - -#if nssv_HAVE_CONSTEXPR_14 -#define nssv_constexpr14 constexpr -#else -#define nssv_constexpr14 /*constexpr*/ -#endif - -#if nssv_HAVE_EXPLICIT_CONVERSION -#define nssv_explicit explicit -#else -#define nssv_explicit /*explicit*/ -#endif - -#if nssv_HAVE_INLINE_NAMESPACE -#define nssv_inline_ns inline -#else -#define nssv_inline_ns /*inline*/ -#endif - -#if nssv_HAVE_NOEXCEPT -#define nssv_noexcept noexcept -#else -#define nssv_noexcept /*noexcept*/ -#endif - -//#if nssv_HAVE_REF_QUALIFIER -//# define nssv_ref_qual & -//# define nssv_refref_qual && -//#else -//# define nssv_ref_qual /*&*/ -//# define nssv_refref_qual /*&&*/ -//#endif - -#if nssv_HAVE_NULLPTR -#define nssv_nullptr nullptr -#else -#define nssv_nullptr NULL -#endif - -#if nssv_HAVE_NODISCARD -#define nssv_nodiscard [[nodiscard]] -#else -#define nssv_nodiscard /*[[nodiscard]]*/ -#endif - -// Additional includes: - -#include <algorithm> -#include <cassert> -#include <iterator> -#include <limits> -#include <ostream> -#include <string> // std::char_traits<> - -#if !nssv_CONFIG_NO_EXCEPTIONS -#include <stdexcept> -#endif - -#if nssv_CPP11_OR_GREATER -#include <type_traits> -#endif - -// Clang, GNUC, MSVC warning suppression macros: - -#if defined(__clang__) -#pragma clang diagnostic ignored "-Wreserved-user-defined-literal" -#pragma clang diagnostic push -#pragma clang diagnostic ignored "-Wuser-defined-literals" -#elif defined(__GNUC__) -#pragma GCC diagnostic push -#pragma GCC diagnostic ignored "-Wliteral-suffix" -#endif // __clang__ - -#if nssv_COMPILER_MSVC_VERSION >= 140 -#define nssv_SUPPRESS_MSGSL_WARNING(expr) [[gsl::suppress(expr)]] -#define nssv_SUPPRESS_MSVC_WARNING(code, descr) __pragma(warning(suppress : code)) -#define nssv_DISABLE_MSVC_WARNINGS(codes) __pragma(warning(push)) __pragma(warning(disable : codes)) -#else -#define nssv_SUPPRESS_MSGSL_WARNING(expr) -#define nssv_SUPPRESS_MSVC_WARNING(code, descr) -#define nssv_DISABLE_MSVC_WARNINGS(codes) -#endif - -#if defined(__clang__) -#define nssv_RESTORE_WARNINGS() _Pragma("clang diagnostic pop") -#elif defined(__GNUC__) -#define nssv_RESTORE_WARNINGS() _Pragma("GCC diagnostic pop") -#elif nssv_COMPILER_MSVC_VERSION >= 140 -#define nssv_RESTORE_WARNINGS() __pragma(warning(pop)) -#else -#define nssv_RESTORE_WARNINGS() -#endif - -// Suppress the following MSVC (GSL) warnings: -// - C4455, non-gsl : 'operator ""sv': literal suffix identifiers that do not -// start with an underscore are reserved -// - C26472, gsl::t.1 : don't use a static_cast for arithmetic conversions; -// use brace initialization, gsl::narrow_cast or gsl::narow -// - C26481: gsl::b.1 : don't use pointer arithmetic. Use span instead - -nssv_DISABLE_MSVC_WARNINGS(4455 26481 26472) - // nssv_DISABLE_CLANG_WARNINGS( "-Wuser-defined-literals" ) - // nssv_DISABLE_GNUC_WARNINGS( -Wliteral-suffix ) - - namespace nonstd { - namespace sv_lite { - -#if nssv_CPP11_OR_GREATER - - namespace detail { - - // Expect tail call optimization to make length() non-recursive: - - template <typename CharT> inline constexpr std::size_t length(CharT *s, std::size_t result = 0) { - return *s == '\0' ? result : length(s + 1, result + 1); - } - - } // namespace detail - -#endif // nssv_CPP11_OR_GREATER - - template <class CharT, class Traits = std::char_traits<CharT>> class basic_string_view; - - // - // basic_string_view: - // - - template <class CharT, class Traits /* = std::char_traits<CharT> */ - > - class basic_string_view { - public: - // Member types: - - typedef Traits traits_type; - typedef CharT value_type; - - typedef CharT *pointer; - typedef CharT const *const_pointer; - typedef CharT &reference; - typedef CharT const &const_reference; - - typedef const_pointer iterator; - typedef const_pointer const_iterator; - typedef std::reverse_iterator<const_iterator> reverse_iterator; - typedef std::reverse_iterator<const_iterator> const_reverse_iterator; - - typedef std::size_t size_type; - typedef std::ptrdiff_t difference_type; - - // 24.4.2.1 Construction and assignment: - - nssv_constexpr basic_string_view() nssv_noexcept : data_(nssv_nullptr), size_(0) {} - -#if nssv_CPP11_OR_GREATER - nssv_constexpr basic_string_view(basic_string_view const &other) nssv_noexcept = default; -#else - nssv_constexpr basic_string_view(basic_string_view const &other) nssv_noexcept : data_(other.data_), - size_(other.size_) {} -#endif - - nssv_constexpr basic_string_view(CharT const *s, size_type count) nssv_noexcept // non-standard noexcept - : data_(s), - size_(count) {} - - nssv_constexpr basic_string_view(CharT const *s) nssv_noexcept // non-standard noexcept - : data_(s) -#if nssv_CPP17_OR_GREATER - , - size_(Traits::length(s)) -#elif nssv_CPP11_OR_GREATER - , - size_(detail::length(s)) -#else - , - size_(Traits::length(s)) -#endif - { - } - - // Assignment: - -#if nssv_CPP11_OR_GREATER - nssv_constexpr14 basic_string_view &operator=(basic_string_view const &other) nssv_noexcept = default; -#else - nssv_constexpr14 basic_string_view &operator=(basic_string_view const &other) nssv_noexcept { - data_ = other.data_; - size_ = other.size_; - return *this; - } -#endif - - // 24.4.2.2 Iterator support: - - nssv_constexpr const_iterator begin() const nssv_noexcept { return data_; } - nssv_constexpr const_iterator end() const nssv_noexcept { return data_ + size_; } - - nssv_constexpr const_iterator cbegin() const nssv_noexcept { return begin(); } - nssv_constexpr const_iterator cend() const nssv_noexcept { return end(); } - - nssv_constexpr const_reverse_iterator rbegin() const nssv_noexcept { return const_reverse_iterator(end()); } - nssv_constexpr const_reverse_iterator rend() const nssv_noexcept { return const_reverse_iterator(begin()); } - - nssv_constexpr const_reverse_iterator crbegin() const nssv_noexcept { return rbegin(); } - nssv_constexpr const_reverse_iterator crend() const nssv_noexcept { return rend(); } - - // 24.4.2.3 Capacity: - - nssv_constexpr size_type size() const nssv_noexcept { return size_; } - nssv_constexpr size_type length() const nssv_noexcept { return size_; } - nssv_constexpr size_type max_size() const nssv_noexcept { return (std::numeric_limits<size_type>::max)(); } - - // since C++20 - nssv_nodiscard nssv_constexpr bool empty() const nssv_noexcept { return 0 == size_; } - - // 24.4.2.4 Element access: - - nssv_constexpr const_reference operator[](size_type pos) const { return data_at(pos); } - - nssv_constexpr14 const_reference at(size_type pos) const { -#if nssv_CONFIG_NO_EXCEPTIONS - assert(pos < size()); -#else - if (pos >= size()) { - throw std::out_of_range("nonstd::string_view::at()"); - } -#endif - return data_at(pos); - } - - nssv_constexpr const_reference front() const { return data_at(0); } - nssv_constexpr const_reference back() const { return data_at(size() - 1); } - - nssv_constexpr const_pointer data() const nssv_noexcept { return data_; } - - // 24.4.2.5 Modifiers: - - nssv_constexpr14 void remove_prefix(size_type n) { - assert(n <= size()); - data_ += n; - size_ -= n; - } - - nssv_constexpr14 void remove_suffix(size_type n) { - assert(n <= size()); - size_ -= n; - } - - nssv_constexpr14 void swap(basic_string_view &other) nssv_noexcept { - using std::swap; - swap(data_, other.data_); - swap(size_, other.size_); - } - - // 24.4.2.6 String operations: - - size_type copy(CharT *dest, size_type n, size_type pos = 0) const { -#if nssv_CONFIG_NO_EXCEPTIONS - assert(pos <= size()); -#else - if (pos > size()) { - throw std::out_of_range("nonstd::string_view::copy()"); - } -#endif - const size_type rlen = (std::min)(n, size() - pos); - - (void)Traits::copy(dest, data() + pos, rlen); - - return rlen; - } - - nssv_constexpr14 basic_string_view substr(size_type pos = 0, size_type n = npos) const { -#if nssv_CONFIG_NO_EXCEPTIONS - assert(pos <= size()); -#else - if (pos > size()) { - throw std::out_of_range("nonstd::string_view::substr()"); - } -#endif - return basic_string_view(data() + pos, (std::min)(n, size() - pos)); - } - - // compare(), 6x: - - nssv_constexpr14 int compare(basic_string_view other) const nssv_noexcept // (1) - { - if (const int result = Traits::compare(data(), other.data(), (std::min)(size(), other.size()))) { - return result; - } - - return size() == other.size() ? 0 : size() < other.size() ? -1 : 1; - } - - nssv_constexpr int compare(size_type pos1, size_type n1, basic_string_view other) const // (2) - { - return substr(pos1, n1).compare(other); - } - - nssv_constexpr int compare(size_type pos1, size_type n1, basic_string_view other, size_type pos2, - size_type n2) const // (3) - { - return substr(pos1, n1).compare(other.substr(pos2, n2)); - } - - nssv_constexpr int compare(CharT const *s) const // (4) - { - return compare(basic_string_view(s)); - } - - nssv_constexpr int compare(size_type pos1, size_type n1, CharT const *s) const // (5) - { - return substr(pos1, n1).compare(basic_string_view(s)); - } - - nssv_constexpr int compare(size_type pos1, size_type n1, CharT const *s, size_type n2) const // (6) - { - return substr(pos1, n1).compare(basic_string_view(s, n2)); - } - - // 24.4.2.7 Searching: - - // starts_with(), 3x, since C++20: - - nssv_constexpr bool starts_with(basic_string_view v) const nssv_noexcept // (1) - { - return size() >= v.size() && compare(0, v.size(), v) == 0; - } - - nssv_constexpr bool starts_with(CharT c) const nssv_noexcept // (2) - { - return starts_with(basic_string_view(&c, 1)); - } - - nssv_constexpr bool starts_with(CharT const *s) const // (3) - { - return starts_with(basic_string_view(s)); - } - - // ends_with(), 3x, since C++20: - - nssv_constexpr bool ends_with(basic_string_view v) const nssv_noexcept // (1) - { - return size() >= v.size() && compare(size() - v.size(), npos, v) == 0; - } - - nssv_constexpr bool ends_with(CharT c) const nssv_noexcept // (2) - { - return ends_with(basic_string_view(&c, 1)); - } - - nssv_constexpr bool ends_with(CharT const *s) const // (3) - { - return ends_with(basic_string_view(s)); - } - - // find(), 4x: - - nssv_constexpr14 size_type find(basic_string_view v, size_type pos = 0) const nssv_noexcept // (1) - { - return assert(v.size() == 0 || v.data() != nssv_nullptr), - pos >= size() ? npos : to_pos(std::search(cbegin() + pos, cend(), v.cbegin(), v.cend(), Traits::eq)); - } - - nssv_constexpr14 size_type find(CharT c, size_type pos = 0) const nssv_noexcept // (2) - { - return find(basic_string_view(&c, 1), pos); - } - - nssv_constexpr14 size_type find(CharT const *s, size_type pos, size_type n) const // (3) - { - return find(basic_string_view(s, n), pos); - } - - nssv_constexpr14 size_type find(CharT const *s, size_type pos = 0) const // (4) - { - return find(basic_string_view(s), pos); - } - - // rfind(), 4x: - - nssv_constexpr14 size_type rfind(basic_string_view v, size_type pos = npos) const nssv_noexcept // (1) - { - if (size() < v.size()) { - return npos; - } - - if (v.empty()) { - return (std::min)(size(), pos); - } - - const_iterator last = cbegin() + (std::min)(size() - v.size(), pos) + v.size(); - const_iterator result = std::find_end(cbegin(), last, v.cbegin(), v.cend(), Traits::eq); - - return result != last ? size_type(result - cbegin()) : npos; - } - - nssv_constexpr14 size_type rfind(CharT c, size_type pos = npos) const nssv_noexcept // (2) - { - return rfind(basic_string_view(&c, 1), pos); - } - - nssv_constexpr14 size_type rfind(CharT const *s, size_type pos, size_type n) const // (3) - { - return rfind(basic_string_view(s, n), pos); - } - - nssv_constexpr14 size_type rfind(CharT const *s, size_type pos = npos) const // (4) - { - return rfind(basic_string_view(s), pos); - } - - // find_first_of(), 4x: - - nssv_constexpr size_type find_first_of(basic_string_view v, size_type pos = 0) const nssv_noexcept // (1) - { - return pos >= size() ? npos - : to_pos(std::find_first_of(cbegin() + pos, cend(), v.cbegin(), v.cend(), Traits::eq)); - } - - nssv_constexpr size_type find_first_of(CharT c, size_type pos = 0) const nssv_noexcept // (2) - { - return find_first_of(basic_string_view(&c, 1), pos); - } - - nssv_constexpr size_type find_first_of(CharT const *s, size_type pos, size_type n) const // (3) - { - return find_first_of(basic_string_view(s, n), pos); - } - - nssv_constexpr size_type find_first_of(CharT const *s, size_type pos = 0) const // (4) - { - return find_first_of(basic_string_view(s), pos); - } - - // find_last_of(), 4x: - - nssv_constexpr size_type find_last_of(basic_string_view v, size_type pos = npos) const nssv_noexcept // (1) - { - return empty() ? npos - : pos >= size() ? find_last_of(v, size() - 1) - : to_pos(std::find_first_of(const_reverse_iterator(cbegin() + pos + 1), crend(), - v.cbegin(), v.cend(), Traits::eq)); - } - - nssv_constexpr size_type find_last_of(CharT c, size_type pos = npos) const nssv_noexcept // (2) - { - return find_last_of(basic_string_view(&c, 1), pos); - } - - nssv_constexpr size_type find_last_of(CharT const *s, size_type pos, size_type count) const // (3) - { - return find_last_of(basic_string_view(s, count), pos); - } - - nssv_constexpr size_type find_last_of(CharT const *s, size_type pos = npos) const // (4) - { - return find_last_of(basic_string_view(s), pos); - } - - // find_first_not_of(), 4x: - - nssv_constexpr size_type find_first_not_of(basic_string_view v, size_type pos = 0) const nssv_noexcept // (1) - { - return pos >= size() ? npos : to_pos(std::find_if(cbegin() + pos, cend(), not_in_view(v))); - } - - nssv_constexpr size_type find_first_not_of(CharT c, size_type pos = 0) const nssv_noexcept // (2) - { - return find_first_not_of(basic_string_view(&c, 1), pos); - } - - nssv_constexpr size_type find_first_not_of(CharT const *s, size_type pos, size_type count) const // (3) - { - return find_first_not_of(basic_string_view(s, count), pos); - } - - nssv_constexpr size_type find_first_not_of(CharT const *s, size_type pos = 0) const // (4) - { - return find_first_not_of(basic_string_view(s), pos); - } - - // find_last_not_of(), 4x: - - nssv_constexpr size_type find_last_not_of(basic_string_view v, size_type pos = npos) const nssv_noexcept // (1) - { - return empty() ? npos - : pos >= size() - ? find_last_not_of(v, size() - 1) - : to_pos(std::find_if(const_reverse_iterator(cbegin() + pos + 1), crend(), not_in_view(v))); - } - - nssv_constexpr size_type find_last_not_of(CharT c, size_type pos = npos) const nssv_noexcept // (2) - { - return find_last_not_of(basic_string_view(&c, 1), pos); - } - - nssv_constexpr size_type find_last_not_of(CharT const *s, size_type pos, size_type count) const // (3) - { - return find_last_not_of(basic_string_view(s, count), pos); - } - - nssv_constexpr size_type find_last_not_of(CharT const *s, size_type pos = npos) const // (4) - { - return find_last_not_of(basic_string_view(s), pos); - } - - // Constants: - -#if nssv_CPP17_OR_GREATER - static nssv_constexpr size_type npos = size_type(-1); -#elif nssv_CPP11_OR_GREATER - enum : size_type { npos = size_type(-1) }; -#else - enum { npos = size_type(-1) }; -#endif - - private: - struct not_in_view { - const basic_string_view v; - - nssv_constexpr explicit not_in_view(basic_string_view v) : v(v) {} - - nssv_constexpr bool operator()(CharT c) const { return npos == v.find_first_of(c); } - }; - - nssv_constexpr size_type to_pos(const_iterator it) const { return it == cend() ? npos : size_type(it - cbegin()); } - - nssv_constexpr size_type to_pos(const_reverse_iterator it) const { - return it == crend() ? npos : size_type(crend() - it - 1); - } - - nssv_constexpr const_reference data_at(size_type pos) const { -#if nssv_BETWEEN(nssv_COMPILER_GNUC_VERSION, 1, 500) - return data_[pos]; -#else - return assert(pos < size()), data_[pos]; -#endif - } - - private: - const_pointer data_; - size_type size_; - - public: -#if nssv_CONFIG_CONVERSION_STD_STRING_CLASS_METHODS - - template <class Allocator> - basic_string_view(std::basic_string<CharT, Traits, Allocator> const &s) nssv_noexcept : data_(s.data()), - size_(s.size()) {} - -#if nssv_HAVE_EXPLICIT_CONVERSION - - template <class Allocator> explicit operator std::basic_string<CharT, Traits, Allocator>() const { - return to_string(Allocator()); - } - -#endif // nssv_HAVE_EXPLICIT_CONVERSION - -#if nssv_CPP11_OR_GREATER - - template <class Allocator = std::allocator<CharT>> - std::basic_string<CharT, Traits, Allocator> to_string(Allocator const &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 <class Allocator> std::basic_string<CharT, Traits, Allocator> to_string(Allocator const &a) const { - return std::basic_string<CharT, Traits, Allocator>(begin(), end(), a); - } - -#endif // nssv_CPP11_OR_GREATER - -#endif // nssv_CONFIG_CONVERSION_STD_STRING_CLASS_METHODS - }; - - // - // Non-member functions: - // - - // 24.4.3 Non-member comparison functions: - // lexicographically compare two string views (function template): - - template <class CharT, class Traits> - nssv_constexpr bool operator==(basic_string_view<CharT, Traits> lhs, - basic_string_view<CharT, Traits> rhs) nssv_noexcept { - return lhs.compare(rhs) == 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator!=(basic_string_view<CharT, Traits> lhs, - basic_string_view<CharT, Traits> rhs) nssv_noexcept { - return lhs.compare(rhs) != 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator<(basic_string_view<CharT, Traits> lhs, - basic_string_view<CharT, Traits> rhs) nssv_noexcept { - return lhs.compare(rhs) < 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator<=(basic_string_view<CharT, Traits> lhs, - basic_string_view<CharT, Traits> rhs) nssv_noexcept { - return lhs.compare(rhs) <= 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator>(basic_string_view<CharT, Traits> lhs, - basic_string_view<CharT, Traits> rhs) nssv_noexcept { - return lhs.compare(rhs) > 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator>=(basic_string_view<CharT, Traits> lhs, - basic_string_view<CharT, Traits> rhs) nssv_noexcept { - return lhs.compare(rhs) >= 0; - } - - // Let S be basic_string_view<CharT, Traits>, and sv be an instance of S. - // Implementations shall provide sufficient additional overloads marked - // constexpr and noexcept so that an object t with an implicit conversion - // to S can be compared according to Table 67. - -#if !nssv_CPP11_OR_GREATER || nssv_BETWEEN(nssv_COMPILER_MSVC_VERSION, 100, 141) - - // accomodate for older compilers: - - // == - - template <class CharT, class Traits> - nssv_constexpr bool operator==(basic_string_view<CharT, Traits> lhs, char const *rhs) nssv_noexcept { - return lhs.compare(rhs) == 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator==(char const *lhs, basic_string_view<CharT, Traits> rhs) nssv_noexcept { - return rhs.compare(lhs) == 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator==(basic_string_view<CharT, Traits> lhs, - std::basic_string<CharT, Traits> rhs) nssv_noexcept { - return lhs.size() == rhs.size() && lhs.compare(rhs) == 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator==(std::basic_string<CharT, Traits> rhs, - basic_string_view<CharT, Traits> lhs) nssv_noexcept { - return lhs.size() == rhs.size() && lhs.compare(rhs) == 0; - } - - // != - - template <class CharT, class Traits> - nssv_constexpr bool operator!=(basic_string_view<CharT, Traits> lhs, char const *rhs) nssv_noexcept { - return lhs.compare(rhs) != 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator!=(char const *lhs, basic_string_view<CharT, Traits> rhs) nssv_noexcept { - return rhs.compare(lhs) != 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator!=(basic_string_view<CharT, Traits> lhs, - std::basic_string<CharT, Traits> rhs) nssv_noexcept { - return lhs.size() != rhs.size() && lhs.compare(rhs) != 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator!=(std::basic_string<CharT, Traits> rhs, - basic_string_view<CharT, Traits> lhs) nssv_noexcept { - return lhs.size() != rhs.size() || rhs.compare(lhs) != 0; - } - - // < - - template <class CharT, class Traits> - nssv_constexpr bool operator<(basic_string_view<CharT, Traits> lhs, char const *rhs) nssv_noexcept { - return lhs.compare(rhs) < 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator<(char const *lhs, basic_string_view<CharT, Traits> rhs) nssv_noexcept { - return rhs.compare(lhs) > 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator<(basic_string_view<CharT, Traits> lhs, - std::basic_string<CharT, Traits> rhs) nssv_noexcept { - return lhs.compare(rhs) < 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator<(std::basic_string<CharT, Traits> rhs, - basic_string_view<CharT, Traits> lhs) nssv_noexcept { - return rhs.compare(lhs) > 0; - } - - // <= - - template <class CharT, class Traits> - nssv_constexpr bool operator<=(basic_string_view<CharT, Traits> lhs, char const *rhs) nssv_noexcept { - return lhs.compare(rhs) <= 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator<=(char const *lhs, basic_string_view<CharT, Traits> rhs) nssv_noexcept { - return rhs.compare(lhs) >= 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator<=(basic_string_view<CharT, Traits> lhs, - std::basic_string<CharT, Traits> rhs) nssv_noexcept { - return lhs.compare(rhs) <= 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator<=(std::basic_string<CharT, Traits> rhs, - basic_string_view<CharT, Traits> lhs) nssv_noexcept { - return rhs.compare(lhs) >= 0; - } - - // > - - template <class CharT, class Traits> - nssv_constexpr bool operator>(basic_string_view<CharT, Traits> lhs, char const *rhs) nssv_noexcept { - return lhs.compare(rhs) > 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator>(char const *lhs, basic_string_view<CharT, Traits> rhs) nssv_noexcept { - return rhs.compare(lhs) < 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator>(basic_string_view<CharT, Traits> lhs, - std::basic_string<CharT, Traits> rhs) nssv_noexcept { - return lhs.compare(rhs) > 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator>(std::basic_string<CharT, Traits> rhs, - basic_string_view<CharT, Traits> lhs) nssv_noexcept { - return rhs.compare(lhs) < 0; - } - - // >= - - template <class CharT, class Traits> - nssv_constexpr bool operator>=(basic_string_view<CharT, Traits> lhs, char const *rhs) nssv_noexcept { - return lhs.compare(rhs) >= 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator>=(char const *lhs, basic_string_view<CharT, Traits> rhs) nssv_noexcept { - return rhs.compare(lhs) <= 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator>=(basic_string_view<CharT, Traits> lhs, - std::basic_string<CharT, Traits> rhs) nssv_noexcept { - return lhs.compare(rhs) >= 0; - } - - template <class CharT, class Traits> - nssv_constexpr bool operator>=(std::basic_string<CharT, Traits> rhs, - basic_string_view<CharT, Traits> lhs) nssv_noexcept { - return rhs.compare(lhs) <= 0; - } - -#else // newer compilers: - -#define nssv_BASIC_STRING_VIEW_I(T, U) typename std::decay<basic_string_view<T, U>>::type - -#if nssv_BETWEEN(nssv_COMPILER_MSVC_VERSION, 140, 150) -#define nssv_MSVC_ORDER(x) , int = x -#else -#define nssv_MSVC_ORDER(x) /*, int=x*/ -#endif - - // == - - template <class CharT, class Traits nssv_MSVC_ORDER(1)> - nssv_constexpr bool operator==(basic_string_view<CharT, Traits> lhs, - nssv_BASIC_STRING_VIEW_I(CharT, Traits) rhs) nssv_noexcept { - return lhs.compare(rhs) == 0; - } - - template <class CharT, class Traits nssv_MSVC_ORDER(2)> - nssv_constexpr bool operator==(nssv_BASIC_STRING_VIEW_I(CharT, Traits) lhs, - basic_string_view<CharT, Traits> rhs) nssv_noexcept { - return lhs.size() == rhs.size() && lhs.compare(rhs) == 0; - } - - // != - - template <class CharT, class Traits nssv_MSVC_ORDER(1)> - nssv_constexpr bool operator!=(basic_string_view<CharT, Traits> lhs, - nssv_BASIC_STRING_VIEW_I(CharT, Traits) rhs) nssv_noexcept { - return lhs.size() != rhs.size() || lhs.compare(rhs) != 0; - } - - template <class CharT, class Traits nssv_MSVC_ORDER(2)> - nssv_constexpr bool operator!=(nssv_BASIC_STRING_VIEW_I(CharT, Traits) lhs, - basic_string_view<CharT, Traits> rhs) nssv_noexcept { - return lhs.compare(rhs) != 0; - } - - // < - - template <class CharT, class Traits nssv_MSVC_ORDER(1)> - nssv_constexpr bool operator<(basic_string_view<CharT, Traits> lhs, - nssv_BASIC_STRING_VIEW_I(CharT, Traits) rhs) nssv_noexcept { - return lhs.compare(rhs) < 0; - } - - template <class CharT, class Traits nssv_MSVC_ORDER(2)> - nssv_constexpr bool operator<(nssv_BASIC_STRING_VIEW_I(CharT, Traits) lhs, - basic_string_view<CharT, Traits> rhs) nssv_noexcept { - return lhs.compare(rhs) < 0; - } - - // <= - - template <class CharT, class Traits nssv_MSVC_ORDER(1)> - nssv_constexpr bool operator<=(basic_string_view<CharT, Traits> lhs, - nssv_BASIC_STRING_VIEW_I(CharT, Traits) rhs) nssv_noexcept { - return lhs.compare(rhs) <= 0; - } - - template <class CharT, class Traits nssv_MSVC_ORDER(2)> - nssv_constexpr bool operator<=(nssv_BASIC_STRING_VIEW_I(CharT, Traits) lhs, - basic_string_view<CharT, Traits> rhs) nssv_noexcept { - return lhs.compare(rhs) <= 0; - } - - // > - - template <class CharT, class Traits nssv_MSVC_ORDER(1)> - nssv_constexpr bool operator>(basic_string_view<CharT, Traits> lhs, - nssv_BASIC_STRING_VIEW_I(CharT, Traits) rhs) nssv_noexcept { - return lhs.compare(rhs) > 0; - } - - template <class CharT, class Traits nssv_MSVC_ORDER(2)> - nssv_constexpr bool operator>(nssv_BASIC_STRING_VIEW_I(CharT, Traits) lhs, - basic_string_view<CharT, Traits> rhs) nssv_noexcept { - return lhs.compare(rhs) > 0; - } - - // >= - - template <class CharT, class Traits nssv_MSVC_ORDER(1)> - nssv_constexpr bool operator>=(basic_string_view<CharT, Traits> lhs, - nssv_BASIC_STRING_VIEW_I(CharT, Traits) rhs) nssv_noexcept { - return lhs.compare(rhs) >= 0; - } - - template <class CharT, class Traits nssv_MSVC_ORDER(2)> - nssv_constexpr bool operator>=(nssv_BASIC_STRING_VIEW_I(CharT, Traits) lhs, - basic_string_view<CharT, Traits> rhs) nssv_noexcept { - return lhs.compare(rhs) >= 0; - } - -#undef nssv_MSVC_ORDER -#undef nssv_BASIC_STRING_VIEW_I - -#endif // compiler-dependent approach to comparisons - - // 24.4.4 Inserters and extractors: - - namespace detail { - - template <class Stream> void write_padding(Stream &os, std::streamsize n) { - for (std::streamsize i = 0; i < n; ++i) - os.rdbuf()->sputc(os.fill()); - } - - template <class Stream, class View> Stream &write_to_stream(Stream &os, View const &sv) { - typename Stream::sentry sentry(os); - - if (!os) - return os; - - const std::streamsize length = static_cast<std::streamsize>(sv.length()); - - // Whether, and how, to pad: - const bool pad = (length < os.width()); - const bool left_pad = pad && (os.flags() & std::ios_base::adjustfield) == std::ios_base::right; - - if (left_pad) - write_padding(os, os.width() - length); - - // Write span characters: - os.rdbuf()->sputn(sv.begin(), length); - - if (pad && !left_pad) - write_padding(os, os.width() - length); - - // Reset output stream width: - os.width(0); - - return os; - } - - } // namespace detail - - template <class CharT, class Traits> - std::basic_ostream<CharT, Traits> &operator<<(std::basic_ostream<CharT, Traits> &os, - basic_string_view<CharT, Traits> sv) { - return detail::write_to_stream(os, sv); - } - - // Several typedefs for common character types are provided: - - typedef basic_string_view<char> string_view; - typedef basic_string_view<wchar_t> wstring_view; -#if nssv_HAVE_WCHAR16_T - typedef basic_string_view<char16_t> u16string_view; - typedef basic_string_view<char32_t> u32string_view; -#endif - - } // namespace sv_lite -} // namespace nonstd::sv_lite - -// -// 24.4.6 Suffix for basic_string_view literals: -// - -#if nssv_HAVE_USER_DEFINED_LITERALS - -namespace nonstd { -nssv_inline_ns namespace literals { - nssv_inline_ns namespace string_view_literals { - -#if nssv_CONFIG_STD_SV_OPERATOR && nssv_HAVE_STD_DEFINED_LITERALS - - nssv_constexpr nonstd::sv_lite::string_view operator"" sv(const char *str, size_t len) nssv_noexcept // (1) - { - return nonstd::sv_lite::string_view {str, len}; - } - - nssv_constexpr nonstd::sv_lite::u16string_view operator"" sv(const char16_t *str, size_t len) nssv_noexcept // (2) - { - return nonstd::sv_lite::u16string_view {str, len}; - } - - nssv_constexpr nonstd::sv_lite::u32string_view operator"" sv(const char32_t *str, size_t len) nssv_noexcept // (3) - { - return nonstd::sv_lite::u32string_view {str, len}; - } - - nssv_constexpr nonstd::sv_lite::wstring_view operator"" sv(const wchar_t *str, size_t len) nssv_noexcept // (4) - { - return nonstd::sv_lite::wstring_view {str, len}; - } - -#endif // nssv_CONFIG_STD_SV_OPERATOR && nssv_HAVE_STD_DEFINED_LITERALS - -#if nssv_CONFIG_USR_SV_OPERATOR - - nssv_constexpr nonstd::sv_lite::string_view operator"" _sv(const char *str, size_t len) nssv_noexcept // (1) - { - return nonstd::sv_lite::string_view {str, len}; - } - - nssv_constexpr nonstd::sv_lite::u16string_view operator"" _sv(const char16_t *str, size_t len) nssv_noexcept // (2) - { - return nonstd::sv_lite::u16string_view {str, len}; - } - - nssv_constexpr nonstd::sv_lite::u32string_view operator"" _sv(const char32_t *str, size_t len) nssv_noexcept // (3) - { - return nonstd::sv_lite::u32string_view {str, len}; - } - - nssv_constexpr nonstd::sv_lite::wstring_view operator"" _sv(const wchar_t *str, size_t len) nssv_noexcept // (4) - { - return nonstd::sv_lite::wstring_view {str, len}; - } - -#endif // nssv_CONFIG_USR_SV_OPERATOR - } -} -} // namespace nonstd - -#endif - -// -// Extensions for std::string: -// - -#if nssv_CONFIG_CONVERSION_STD_STRING_FREE_FUNCTIONS - -namespace nonstd { -namespace sv_lite { - -// Exclude MSVC 14 (19.00): it yields ambiguous to_string(): - -#if nssv_CPP11_OR_GREATER && nssv_COMPILER_MSVC_VERSION != 140 - -template <class CharT, class Traits, class Allocator = std::allocator<CharT>> -std::basic_string<CharT, Traits, Allocator> to_string(basic_string_view<CharT, Traits> v, - Allocator const &a = Allocator()) { - return std::basic_string<CharT, Traits, Allocator>(v.begin(), v.end(), a); -} - -#else - -template <class CharT, class Traits> std::basic_string<CharT, Traits> to_string(basic_string_view<CharT, Traits> v) { - return std::basic_string<CharT, Traits>(v.begin(), v.end()); -} - -template <class CharT, class Traits, class Allocator> -std::basic_string<CharT, Traits, Allocator> to_string(basic_string_view<CharT, Traits> v, Allocator const &a) { - return std::basic_string<CharT, Traits, Allocator>(v.begin(), v.end(), a); -} - -#endif // nssv_CPP11_OR_GREATER - -template <class CharT, class Traits, class Allocator> -basic_string_view<CharT, Traits> to_string_view(std::basic_string<CharT, Traits, Allocator> const &s) { - return basic_string_view<CharT, Traits>(s.data(), s.size()); -} - -} // namespace sv_lite -} // namespace nonstd - -#endif // nssv_CONFIG_CONVERSION_STD_STRING_FREE_FUNCTIONS - -// -// make types and algorithms available in namespace nonstd: -// - -namespace nonstd { - -using sv_lite::basic_string_view; -using sv_lite::string_view; -using sv_lite::wstring_view; - -#if nssv_HAVE_WCHAR16_T -using sv_lite::u16string_view; -#endif -#if nssv_HAVE_WCHAR32_T -using sv_lite::u32string_view; -#endif - -// literal "sv" - -using sv_lite::operator==; -using sv_lite::operator!=; -using sv_lite::operator<; -using sv_lite::operator<=; -using sv_lite::operator>; -using sv_lite::operator>=; - -using sv_lite::operator<<; - -#if nssv_CONFIG_CONVERSION_STD_STRING_FREE_FUNCTIONS -using sv_lite::to_string; -using sv_lite::to_string_view; -#endif - -} // namespace nonstd - -// 24.4.5 Hash support (C++11): - -// Note: The hash value of a string view object is equal to the hash value of -// the corresponding string object. - -#if nssv_HAVE_STD_HASH - -#include <functional> - -namespace std { - -template <> struct hash<nonstd::string_view> { -public: - std::size_t operator()(nonstd::string_view v) const nssv_noexcept { - return std::hash<std::string>()(std::string(v.data(), v.size())); - } -}; - -template <> struct hash<nonstd::wstring_view> { -public: - std::size_t operator()(nonstd::wstring_view v) const nssv_noexcept { - return std::hash<std::wstring>()(std::wstring(v.data(), v.size())); - } -}; - -template <> struct hash<nonstd::u16string_view> { -public: - std::size_t operator()(nonstd::u16string_view v) const nssv_noexcept { - return std::hash<std::u16string>()(std::u16string(v.data(), v.size())); - } -}; - -template <> struct hash<nonstd::u32string_view> { -public: - std::size_t operator()(nonstd::u32string_view v) const nssv_noexcept { - return std::hash<std::u32string>()(std::u32string(v.data(), v.size())); - } -}; - -} // namespace std - -#endif // nssv_HAVE_STD_HASH - -nssv_RESTORE_WARNINGS() - -#endif // nssv_HAVE_STD_STRING_VIEW -#endif // NONSTD_SV_LITE_H_INCLUDED |