1e96364cf0
Change-Id: Id9d038d50d5b6335a2f354c759b2c1e5dd413cec Reviewed-on: https://gerrit.libreoffice.org/49037 Tested-by: Jenkins <ci@libreoffice.org> Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
869 lines
28 KiB
C++
869 lines
28 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#ifndef INCLUDED_O3TL_STRING_VIEW_HXX
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#define INCLUDED_O3TL_STRING_VIEW_HXX
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#include <sal/config.h>
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#include <algorithm>
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#include <cstddef>
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#include <ios>
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#include <iterator>
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#include <ostream>
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#include <stdexcept>
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#include <string>
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#include <type_traits>
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#include <utility>
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#include <config_global.h>
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#include <rtl/string.hxx>
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#include <rtl/ustring.hxx>
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#include <sal/types.h>
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// An approximation of C++17 <string_view>, including implicit conversion
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// from rtl::OString and rtl::OUString.
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namespace o3tl {
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namespace detail {
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template<typename T> struct CharPtrDetector {
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static constexpr bool ok = false;
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};
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template<> struct CharPtrDetector<char *> {
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static constexpr bool ok = true;
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};
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template<> struct CharPtrDetector<char const *> {
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static constexpr bool ok = true;
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};
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template<typename T> struct NonConstCharArrayDetector {
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static constexpr bool ok = false;
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};
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template<std::size_t N> struct NonConstCharArrayDetector<char [N]> {
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static constexpr bool ok = true;
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};
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template<typename T> struct ConstCharArrayDetector {
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static constexpr bool ok = false;
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};
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template<std::size_t N> struct ConstCharArrayDetector<char const[N]> {
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static constexpr bool ok = true;
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static constexpr std::size_t length = N - 1;
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};
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template<typename T> struct Char16PtrDetector {
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static constexpr bool ok = false;
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};
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template<> struct Char16PtrDetector<char16_t *> {
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static constexpr bool ok = true;
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};
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template<> struct Char16PtrDetector<char16_t const *> {
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static constexpr bool ok = true;
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};
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template<typename T> struct NonConstChar16ArrayDetector {
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static constexpr bool ok = false;
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};
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template<std::size_t N> struct NonConstChar16ArrayDetector<char16_t [N]> {
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static constexpr bool ok = true;
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};
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template<typename T> struct ConstChar16ArrayDetector {
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static constexpr bool ok = false;
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};
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template<std::size_t N> struct ConstChar16ArrayDetector<char16_t const[N]> {
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static constexpr bool ok = true;
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static constexpr std::size_t length = N - 1;
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};
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template<typename T> struct Char32PtrDetector {
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static constexpr bool ok = false;
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};
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template<> struct Char32PtrDetector<char32_t *> {
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static constexpr bool ok = true;
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};
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template<> struct Char32PtrDetector<char32_t const *> {
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static constexpr bool ok = true;
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};
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template<typename T> struct NonConstChar32ArrayDetector {
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static constexpr bool ok = false;
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};
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template<std::size_t N> struct NonConstChar32ArrayDetector<char32_t [N]> {
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static constexpr bool ok = true;
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};
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template<typename T> struct ConstChar32ArrayDetector {
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static constexpr bool ok = false;
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};
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template<std::size_t N> struct ConstChar32ArrayDetector<char32_t const[N]> {
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static constexpr bool ok = true;
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static constexpr std::size_t length = N - 1;
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};
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template<typename T> struct WcharPtrDetector {
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static constexpr bool ok = false;
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};
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template<> struct WcharPtrDetector<wchar_t *> {
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static constexpr bool ok = true;
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};
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template<> struct WcharPtrDetector<wchar_t const *> {
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static constexpr bool ok = true;
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};
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template<typename T> struct NonConstWcharArrayDetector {
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static constexpr bool ok = false;
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};
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template<std::size_t N> struct NonConstWcharArrayDetector<wchar_t [N]> {
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static constexpr bool ok = true;
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};
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template<typename T> struct ConstWcharArrayDetector {
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static constexpr bool ok = false;
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};
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template<std::size_t N> struct ConstWcharArrayDetector<wchar_t const[N]> {
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static constexpr bool ok = true;
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static constexpr std::size_t length = N - 1;
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};
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}
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template<typename charT, typename traits = std::char_traits<charT>>
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class basic_string_view {
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public:
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using traits_type = traits;
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using value_type = charT;
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using pointer = value_type *;
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using const_pointer = value_type const *;
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using reference = value_type &;
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using const_reference = value_type const &;
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using const_iterator = const_pointer;
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using iterator = const_iterator;
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using const_reverse_iterator = std::reverse_iterator<const_iterator>;
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using reverse_iterator = const_reverse_iterator;
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using size_type = std::size_t;
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using difference_type = std::ptrdiff_t;
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static constexpr size_type npos = size_type(-1);
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constexpr basic_string_view() noexcept: data_(nullptr), size_(0) {}
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constexpr basic_string_view(basic_string_view const &) noexcept = default;
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#if HAVE_CXX14_CONSTEXPR
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constexpr
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#endif
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basic_string_view & operator =(basic_string_view const & other) noexcept
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#if defined _MSC_VER && _MSC_VER <= 1900 && !defined __clang__
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{
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data_ = other.data_;
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size_ = other.size_;
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return *this;
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}
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#else
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= default;
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#endif
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// The various character types are handled below in the "LO specifics, to
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// make up for traits::length not necessarily being constexpr yet for
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// literal arguments" section:
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template<typename T = charT> constexpr basic_string_view(
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charT const * str,
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typename std::enable_if<
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!(std::is_same<T, char>::value || std::is_same<T, char16_t>::value
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|| std::is_same<T, char32_t>::value
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|| std::is_same<T, wchar_t>::value),
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rtl::libreoffice_internal::Dummy>::type = {}):
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data_(str), size_(traits::length(str)) {}
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constexpr basic_string_view(charT const * str, size_type len):
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data_(str), size_(len) {}
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constexpr const_iterator begin() const noexcept { return data_; }
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constexpr const_iterator end() const noexcept { return begin() + size(); }
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constexpr const_iterator cbegin() const noexcept { return begin(); }
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constexpr const_iterator cend() const noexcept { return end(); }
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constexpr const_reverse_iterator rbegin() const noexcept
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{ return const_reverse_iterator(end()); }
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constexpr const_reverse_iterator rend() const noexcept
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{ return const_reverse_iterator(begin()); }
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constexpr const_reverse_iterator crbegin() const noexcept
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{ return rbegin(); }
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constexpr const_reverse_iterator crend() const noexcept { return rend(); }
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constexpr size_type size() const noexcept { return size_; }
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constexpr size_type length() const noexcept { return size(); }
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#if !defined __clang__ || HAVE_CXX14_CONSTEXPR
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constexpr
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#endif
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size_type max_size() const noexcept {
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#if defined __clang__ // avoid constexpr issues with other, older compilers
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(void) this; // loplugin:staticmethods
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#endif
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return npos - 1;
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}
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constexpr bool empty() const noexcept { return size_ == 0; }
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constexpr const_reference operator [](size_type pos) const {
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#if HAVE_CXX14_CONSTEXPR
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assert(pos < size());
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#endif
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return data_[pos];
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}
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#if HAVE_CXX14_CONSTEXPR
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constexpr
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#endif
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const_reference at(size_type pos) const {
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if (pos >= size()) {
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throw std::out_of_range("o3tl::basic_string_view::at");
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}
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return operator [](pos);
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}
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constexpr const_reference front() const {
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#if HAVE_CXX14_CONSTEXPR
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assert(!empty());
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#endif
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return operator [](0);
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}
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constexpr const_reference back() const {
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#if HAVE_CXX14_CONSTEXPR
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assert(!empty());
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#endif
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return operator [](size() - 1);
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}
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constexpr const_pointer data() const noexcept { return data_; }
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#if HAVE_CXX14_CONSTEXPR
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constexpr
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#endif
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void remove_prefix(size_type n) {
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assert(n <= size());
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data_ += n;
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size_ -= n;
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}
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#if HAVE_CXX14_CONSTEXPR
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constexpr
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#endif
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void remove_suffix(size_type n) {
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assert(n <= size());
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size_ -= n;
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}
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#if HAVE_CXX14_CONSTEXPR
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constexpr
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#endif
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void swap(basic_string_view & s) noexcept {
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std::swap(data_, s.data_);
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std::swap(size_, s.size_);
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}
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size_type copy(charT * s, size_type n, size_type pos = 0) const {
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if (pos > size()) {
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throw std::out_of_range("o3tl::basic_string_view::copy");
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}
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auto rlen = std::min(n, size_type(size() - pos));
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traits::copy(s, data() + pos, rlen);
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return rlen;
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}
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#if HAVE_CXX14_CONSTEXPR
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constexpr
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#endif
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basic_string_view substr(size_type pos = 0, size_type n = npos) const {
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if (pos > size()) {
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throw std::out_of_range("o3tl::basic_string_view::copy");
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}
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return basic_string_view(
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data() + pos, std::min(n, size_type(size() - pos)));
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}
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#if HAVE_CXX14_CONSTEXPR
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constexpr
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#endif
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int compare(basic_string_view s) const noexcept {
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auto n = traits::compare(data(), s.data(), std::min(size(), s.size()));
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return n == 0
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? (size() < s.size() ? -1 : size() == s.size() ? 0 : 1) : n;
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}
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constexpr int compare(size_type pos1, size_type n1, basic_string_view s)
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const
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{ return substr(pos1, n1).compare(s); }
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constexpr int compare(
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size_type pos1, size_type n1, basic_string_view s, size_type pos2,
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size_type n2) const
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{ return substr(pos1, n1).compare(s.substr(pos2, n2)); }
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constexpr int compare(charT const * s) const
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{ return compare(basic_string_view(s)); }
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constexpr int compare(size_type pos1, size_type n1, charT const * s) const
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{ return substr(pos1, n1).compare(s); }
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constexpr int compare(
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size_type pos1, size_type n1, charT const * s, size_type n2) const
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{ return substr(pos1, n1).compare(basic_string_view(s, n2)); }
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#if HAVE_CXX14_CONSTEXPR
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constexpr
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#endif
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size_type find(basic_string_view s, size_type pos = 0) const noexcept {
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if (s.size() <= size()) {
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for (auto xpos = pos; xpos <= size() - s.size(); ++xpos) {
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bool match = true;
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for (size_type i = 0; i != s.size(); ++i) {
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if (!traits::eq(data_[xpos + i], s.data_[i])) {
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match = false;
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break;
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}
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}
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if (match) {
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return xpos;
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}
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}
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}
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return npos;
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}
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constexpr size_type find(charT c, size_type pos = 0) const noexcept
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{ return find(basic_string_view(&c, 1), pos); }
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constexpr size_type find(charT const * s, size_type pos, size_type n) const
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{ return find(basic_string_view(s, n), pos); }
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constexpr size_type find(charT const * s, size_type pos = 0) const
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{ return find(basic_string_view(s), pos); }
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#if HAVE_CXX14_CONSTEXPR
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constexpr
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#endif
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size_type rfind(basic_string_view s, size_type pos = npos) const noexcept {
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if (s.size() <= size()) {
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for (auto xpos = std::min<size_type>(size() - s.size(), pos);;
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--xpos)
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{
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bool match = true;
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for (size_type i = 0; i != s.size(); ++i) {
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if (!traits::eq(data_[xpos + i], s.data_[i])) {
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match = false;
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break;
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}
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}
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if (match) {
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return xpos;
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}
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if (xpos == 0) {
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break;
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}
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}
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}
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return npos;
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}
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constexpr size_type rfind(charT c, size_type pos = npos) const noexcept
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{ return rfind(basic_string_view(&c, 1), pos); }
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constexpr size_type rfind(charT const * s, size_type pos, size_type n) const
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{ return rfind(basic_string_view(s, n), pos); }
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constexpr size_type rfind(charT const * s, size_type pos = npos) const
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{ return rfind(basic_string_view(s), pos); }
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#if HAVE_CXX14_CONSTEXPR
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constexpr
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#endif
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size_type find_first_of(basic_string_view s, size_type pos = 0) const
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noexcept
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{
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for (auto xpos = pos; xpos < size(); ++xpos) {
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for (size_type i = 0; i != s.size(); ++i) {
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if (traits::eq(data_[xpos], s.data_[i])) {
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return xpos;
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}
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}
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}
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return npos;
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}
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constexpr size_type find_first_of(charT c, size_type pos = 0) const noexcept
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{ return find_first_of(basic_string_view(&c, 1), pos); }
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constexpr size_type find_first_of(
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charT const * s, size_type pos, size_type n) const
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{ return find_first_of(basic_string_view(s, n), pos); }
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constexpr size_type find_first_of(charT const * s, size_type pos = 0) const
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{ return find_first_of(basic_string_view(s), pos); }
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#if HAVE_CXX14_CONSTEXPR
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constexpr
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#endif
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size_type find_last_of(basic_string_view s, size_type pos = npos) const
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noexcept
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{
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if (!empty()) {
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for (auto xpos = std::min<size_type>(size() - 1, pos);; --xpos) {
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for (size_type i = 0; i != s.size(); ++i) {
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if (traits::eq(data_[xpos], s.data_[i])) {
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return xpos;
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}
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}
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if (xpos == 0) {
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break;
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}
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}
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}
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return npos;
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}
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constexpr size_type find_last_of(charT c, size_type pos = npos) const
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noexcept
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{ return find_last_of(basic_string_view(&c, 1), pos); }
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constexpr size_type find_last_of(
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charT const * s, size_type pos, size_type n) const
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{ return find_last_of(basic_string_view(s, n), pos); }
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constexpr size_type find_last_of(charT const * s, size_type pos = npos)
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const
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{ return find_last_of(basic_string_view(s), pos); }
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#if HAVE_CXX14_CONSTEXPR
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constexpr
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#endif
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size_type find_first_not_of(basic_string_view s, size_type pos = 0) const
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noexcept
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{
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for (auto xpos = pos; xpos < size(); ++xpos) {
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bool match = true;
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for (size_type i = 0; i != s.size(); ++i) {
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if (traits::eq(data_[xpos], s.data_[i])) {
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match = false;
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break;
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}
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}
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if (match) {
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return xpos;
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}
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}
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return npos;
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}
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constexpr size_type find_first_not_of(charT c, size_type pos = 0) const
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noexcept
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{ return find_first_not_of(basic_string_view(&c, 1), pos); }
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constexpr size_type find_first_not_of(
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charT const * s, size_type pos, size_type n) const
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{ return find_first_not_of(basic_string_view(s, n), pos); }
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constexpr size_type find_first_not_of(charT const * s, size_type pos = 0)
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const
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{ return find_first_not_of(basic_string_view(s), pos); }
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#if HAVE_CXX14_CONSTEXPR
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constexpr
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#endif
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size_type find_last_not_of(basic_string_view s, size_type pos = npos) const
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noexcept
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{
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if (!empty()) {
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for (auto xpos = std::min<size_type>(size() - 1, pos);; --xpos) {
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bool match = true;
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for (size_type i = 0; i != s.size(); ++i) {
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if (traits::eq(data_[xpos], s.data_[i])) {
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match = false;
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break;
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}
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}
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if (match) {
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return xpos;
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}
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if (xpos == 0) {
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break;
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}
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}
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}
|
|
return npos;
|
|
}
|
|
|
|
constexpr size_type find_last_not_of(charT c, size_type pos = npos) const
|
|
noexcept
|
|
{ return find_last_not_of(basic_string_view(&c, 1), pos); }
|
|
|
|
constexpr size_type find_last_not_of(
|
|
charT const * s, size_type pos, size_type n) const
|
|
{ return find_last_not_of(basic_string_view(s, n), pos); }
|
|
|
|
constexpr size_type find_last_not_of(charT const * s, size_type pos = npos)
|
|
const
|
|
{ return find_last_not_of(basic_string_view(s), pos); }
|
|
|
|
// LO specifics:
|
|
|
|
// For std::basic_string_view, this is provided via a non-explicit
|
|
// conversion operator from std::basic_string:
|
|
constexpr basic_string_view(std::basic_string<charT, traits> const & s):
|
|
data_(s.data()), size_(s.size()) {}
|
|
|
|
// For std::string_view, this will be provided by a (LIBO_INTERNAL_ONLY)
|
|
// non-explicit conversion operator from rtl::OString:
|
|
template<typename T = charT> basic_string_view(
|
|
OString const & s,
|
|
typename std::enable_if<
|
|
std::is_same<T, char>::value,
|
|
rtl::libreoffice_internal::Dummy>::type = {}):
|
|
data_(s.getStr()), size_(s.getLength()) {}
|
|
|
|
// For std::u16string_view, this will be provided by a (LIBO_INTERNAL_ONLY)
|
|
// non-explicit conversion operator from rtl::OUString:
|
|
template<typename T = charT> basic_string_view(
|
|
OUString const & s,
|
|
typename std::enable_if<
|
|
std::is_same<T, sal_Unicode>::value,
|
|
rtl::libreoffice_internal::Dummy>::type = {}):
|
|
data_(s.getStr()), size_(s.getLength()) {}
|
|
|
|
// For std::u16string_view, this would either be provided by a
|
|
// (LIBO_INTERNAL_ONLY) non-explicit conversion operator from
|
|
// rtl::OUStringLiteral, or rtl::OUStringLiteral would be given up in favor
|
|
// of std::u16string_view anyway (but this constructor also serves to reject
|
|
// as ambiguous construction of a o3tl::u16string_view from a narrow string
|
|
// literal, which would otherwise go via the above rtl::OUString
|
|
// constructor):
|
|
template<typename T = charT> constexpr basic_string_view(
|
|
OUStringLiteral literal,
|
|
typename std::enable_if<
|
|
std::is_same<T, sal_Unicode>::value,
|
|
rtl::libreoffice_internal::Dummy>::type = {}):
|
|
data_(literal.data), size_(literal.size) {}
|
|
|
|
// LO specifics, to make up for traits::length not necessarily being
|
|
// constexpr yet for literal arguments:
|
|
|
|
template<typename T1, typename T2 = charT> constexpr basic_string_view(
|
|
T1 const & value,
|
|
typename std::enable_if<
|
|
std::is_same<T2, char>::value && detail::CharPtrDetector<T1>::ok,
|
|
rtl::libreoffice_internal::Dummy>::type = {}):
|
|
data_(value), size_(traits::length(value)) {}
|
|
|
|
template<typename T1, typename T2 = charT> constexpr basic_string_view(
|
|
T1 & value,
|
|
typename std::enable_if<
|
|
(std::is_same<T2, char>::value
|
|
&& detail::NonConstCharArrayDetector<T1>::ok),
|
|
rtl::libreoffice_internal::Dummy>::type = {}):
|
|
data_(value), size_(traits::length(value)) {}
|
|
|
|
template<typename T1, typename T2 = charT> constexpr basic_string_view(
|
|
T1 & literal,
|
|
typename std::enable_if<
|
|
(std::is_same<T2, char>::value
|
|
&& detail::ConstCharArrayDetector<T1>::ok),
|
|
rtl::libreoffice_internal::Dummy>::type = {}):
|
|
data_(literal), size_(detail::ConstCharArrayDetector<T1>::length)
|
|
{ /*assert(size_ == traits::length(literal);*/ }
|
|
|
|
template<typename T1, typename T2 = charT> constexpr basic_string_view(
|
|
T1 const & value,
|
|
typename std::enable_if<
|
|
(std::is_same<T2, char16_t>::value
|
|
&& detail::Char16PtrDetector<T1>::ok),
|
|
rtl::libreoffice_internal::Dummy>::type = {}):
|
|
data_(value), size_(traits::length(value)) {}
|
|
|
|
template<typename T1, typename T2 = charT> constexpr basic_string_view(
|
|
T1 & value,
|
|
typename std::enable_if<
|
|
(std::is_same<T2, char16_t>::value
|
|
&& detail::NonConstChar16ArrayDetector<T1>::ok),
|
|
rtl::libreoffice_internal::Dummy>::type = {}):
|
|
data_(value), size_(traits::length(value)) {}
|
|
|
|
template<typename T1, typename T2 = charT> constexpr basic_string_view(
|
|
T1 & literal,
|
|
typename std::enable_if<
|
|
(std::is_same<T2, char16_t>::value
|
|
&& detail::ConstChar16ArrayDetector<T1>::ok),
|
|
rtl::libreoffice_internal::Dummy>::type = {}):
|
|
data_(literal), size_(detail::ConstChar16ArrayDetector<T1>::length)
|
|
{ /*assert(size_ == traits::length(literal);*/ }
|
|
|
|
template<typename T1, typename T2 = charT> constexpr basic_string_view(
|
|
T1 const & value,
|
|
typename std::enable_if<
|
|
(std::is_same<T2, char32_t>::value
|
|
&& detail::Char32PtrDetector<T1>::ok),
|
|
rtl::libreoffice_internal::Dummy>::type = {}):
|
|
data_(value), size_(traits::length(value)) {}
|
|
|
|
template<typename T1, typename T2 = charT> constexpr basic_string_view(
|
|
T1 & value,
|
|
typename std::enable_if<
|
|
(std::is_same<T2, char32_t>::value
|
|
&& detail::NonConstChar32ArrayDetector<T1>::ok),
|
|
rtl::libreoffice_internal::Dummy>::type = {}):
|
|
data_(value), size_(traits::length(value)) {}
|
|
|
|
template<typename T1, typename T2 = charT> constexpr basic_string_view(
|
|
T1 & literal,
|
|
typename std::enable_if<
|
|
(std::is_same<T2, char32_t>::value
|
|
&& detail::ConstChar32ArrayDetector<T1>::ok),
|
|
rtl::libreoffice_internal::Dummy>::type = {}):
|
|
data_(literal), size_(detail::ConstChar32ArrayDetector<T1>::length)
|
|
{ /*assert(size_ == traits::length(literal);*/ }
|
|
|
|
template<typename T1, typename T2 = charT> constexpr basic_string_view(
|
|
T1 const & value,
|
|
typename std::enable_if<
|
|
(std::is_same<T2, wchar_t>::value
|
|
&& detail::WcharPtrDetector<T1>::ok),
|
|
rtl::libreoffice_internal::Dummy>::type = {}):
|
|
data_(value), size_(traits::length(value)) {}
|
|
|
|
template<typename T1, typename T2 = charT> constexpr basic_string_view(
|
|
T1 & value,
|
|
typename std::enable_if<
|
|
(std::is_same<T2, wchar_t>::value
|
|
&& detail::NonConstWcharArrayDetector<T1>::ok),
|
|
rtl::libreoffice_internal::Dummy>::type = {}):
|
|
data_(value), size_(traits::length(value)) {}
|
|
|
|
template<typename T1, typename T2 = charT> constexpr basic_string_view(
|
|
T1 & literal,
|
|
typename std::enable_if<
|
|
(std::is_same<T2, wchar_t>::value
|
|
&& detail::ConstWcharArrayDetector<T1>::ok),
|
|
rtl::libreoffice_internal::Dummy>::type = {}):
|
|
data_(literal), size_(detail::ConstWcharArrayDetector<T1>::length)
|
|
{ /*assert(size_ == traits::length(literal);*/ }
|
|
|
|
private:
|
|
const_pointer data_;
|
|
size_type size_;
|
|
};
|
|
|
|
template<class charT, class traits> constexpr bool operator ==(
|
|
basic_string_view<charT, traits> x, basic_string_view<charT, traits> y)
|
|
noexcept
|
|
{ return x.compare(y) == 0; }
|
|
|
|
template<class charT, class traits> constexpr bool operator ==(
|
|
basic_string_view<charT, traits> x,
|
|
typename std::decay<basic_string_view<charT, traits>>::type y)
|
|
noexcept
|
|
{ return x.compare(y) == 0; }
|
|
|
|
template<class charT, class traits> constexpr bool operator ==(
|
|
typename std::decay<basic_string_view<charT, traits>>::type x,
|
|
basic_string_view<charT, traits> y)
|
|
noexcept
|
|
{ return x.compare(y) == 0; }
|
|
|
|
template<class charT, class traits> constexpr bool operator !=(
|
|
basic_string_view<charT, traits> x, basic_string_view<charT, traits> y)
|
|
noexcept
|
|
{ return x.compare(y) != 0; }
|
|
|
|
template<class charT, class traits> constexpr bool operator !=(
|
|
basic_string_view<charT, traits> x,
|
|
typename std::decay<basic_string_view<charT, traits>>::type y)
|
|
noexcept
|
|
{ return x.compare(y) != 0; }
|
|
|
|
template<class charT, class traits> constexpr bool operator !=(
|
|
typename std::decay<basic_string_view<charT, traits>>::type x,
|
|
basic_string_view<charT, traits> y)
|
|
noexcept
|
|
{ return x.compare(y) != 0; }
|
|
|
|
template<class charT, class traits> constexpr bool operator <(
|
|
basic_string_view<charT, traits> x, basic_string_view<charT, traits> y)
|
|
noexcept
|
|
{ return x.compare(y) < 0; }
|
|
|
|
template<class charT, class traits> constexpr bool operator <(
|
|
basic_string_view<charT, traits> x,
|
|
typename std::decay<basic_string_view<charT, traits>>::type y)
|
|
noexcept
|
|
{ return x.compare(y) < 0; }
|
|
|
|
template<class charT, class traits> constexpr bool operator <(
|
|
typename std::decay<basic_string_view<charT, traits>>::type x,
|
|
basic_string_view<charT, traits> y)
|
|
noexcept
|
|
{ return x.compare(y) < 0; }
|
|
|
|
template<class charT, class traits> constexpr bool operator >(
|
|
basic_string_view<charT, traits> x, basic_string_view<charT, traits> y)
|
|
noexcept
|
|
{ return x.compare(y) > 0; }
|
|
|
|
template<class charT, class traits> constexpr bool operator >(
|
|
basic_string_view<charT, traits> x,
|
|
typename std::decay<basic_string_view<charT, traits>>::type y)
|
|
noexcept
|
|
{ return x.compare(y) > 0; }
|
|
|
|
template<class charT, class traits> constexpr bool operator >(
|
|
typename std::decay<basic_string_view<charT, traits>>::type x,
|
|
basic_string_view<charT, traits> y)
|
|
noexcept
|
|
{ return x.compare(y) > 0; }
|
|
|
|
template<class charT, class traits> constexpr bool operator <=(
|
|
basic_string_view<charT, traits> x, basic_string_view<charT, traits> y)
|
|
noexcept
|
|
{ return x.compare(y) <= 0; }
|
|
|
|
template<class charT, class traits> constexpr bool operator <=(
|
|
basic_string_view<charT, traits> x,
|
|
typename std::decay<basic_string_view<charT, traits>>::type y)
|
|
noexcept
|
|
{ return x.compare(y) <= 0; }
|
|
|
|
template<class charT, class traits> constexpr bool operator <=(
|
|
typename std::decay<basic_string_view<charT, traits>>::type x,
|
|
basic_string_view<charT, traits> y)
|
|
noexcept
|
|
{ return x.compare(y) <= 0; }
|
|
|
|
template<class charT, class traits> constexpr bool operator >=(
|
|
basic_string_view<charT, traits> x, basic_string_view<charT, traits> y)
|
|
noexcept
|
|
{ return x.compare(y) >= 0; }
|
|
|
|
template<class charT, class traits> constexpr bool operator >=(
|
|
basic_string_view<charT, traits> x,
|
|
typename std::decay<basic_string_view<charT, traits>>::type y)
|
|
noexcept
|
|
{ return x.compare(y) >= 0; }
|
|
|
|
template<class charT, class traits> constexpr bool operator >=(
|
|
typename std::decay<basic_string_view<charT, traits>>::type x,
|
|
basic_string_view<charT, traits> y)
|
|
noexcept
|
|
{ return x.compare(y) >= 0; }
|
|
|
|
template<class charT, class traits> std::basic_ostream<charT, traits> &
|
|
operator <<(
|
|
std::basic_ostream<charT, traits> & os,
|
|
basic_string_view<charT, traits> str)
|
|
{
|
|
typename std::basic_ostream<charT, traits>::sentry sentry;
|
|
if (sentry) {
|
|
auto const w = os.width();
|
|
auto const pad
|
|
= std::max<std::make_unsigned<decltype(w + str.size())>::type>(
|
|
w < 0 ? 0 : w, str.size());
|
|
auto const after = (os.flags() & std::ios_base::adjustfield)
|
|
== std::ios_base::left;
|
|
if (pad != 0 && !after) {
|
|
auto const c = os.fill();
|
|
for (; pad != 0; --pad) {
|
|
os.rdbuf()->sputc(c);
|
|
}
|
|
}
|
|
os.rdbuf()->sputn(str.data(), str.size());
|
|
if (pad != 0 && after) {
|
|
auto const c = os.fill();
|
|
for (; pad != 0; --pad) {
|
|
os.rdbuf()->sputc(c);
|
|
}
|
|
}
|
|
os.width(0);
|
|
} else {
|
|
os.setstate(std::ios_base::failbit);
|
|
}
|
|
return os;
|
|
}
|
|
|
|
using string_view = basic_string_view<char>;
|
|
using u16string_view = basic_string_view<char16_t>;
|
|
using u32string_view = basic_string_view<char32_t>;
|
|
using wstring_view = basic_string_view<wchar_t>;
|
|
|
|
// no literals::string_view_literals::operator "" sv
|
|
|
|
}
|
|
|
|
namespace std {
|
|
|
|
template<> struct hash<o3tl::string_view> {
|
|
std::size_t operator ()(o3tl::string_view s)
|
|
{ return hash<string>()(string(s.data(), s.size())); }
|
|
};
|
|
|
|
template<> struct hash<o3tl::u16string_view> {
|
|
std::size_t operator ()(o3tl::u16string_view s)
|
|
{ return hash<u16string>()(u16string(s.data(), s.size())); }
|
|
};
|
|
|
|
template<> struct hash<o3tl::u32string_view> {
|
|
std::size_t operator ()(o3tl::u32string_view s)
|
|
{ return hash<u32string>()(u32string(s.data(), s.size())); }
|
|
};
|
|
|
|
template<> struct hash<o3tl::wstring_view> {
|
|
std::size_t operator ()(o3tl::wstring_view s)
|
|
{ return hash<wstring>()(wstring(s.data(), s.size())); }
|
|
};
|
|
|
|
}
|
|
|
|
namespace o3tl {
|
|
|
|
// LO-specific convenience functions:
|
|
|
|
// For std::u16string_view, this will be provided by a (LIBO_INTERNAL_ONLY)
|
|
// rtl::OUString constructor:
|
|
inline OUString toOUString(u16string_view s)
|
|
{ return OUString(s.data(), s.size()); }
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
|