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184 lines
6.7 KiB
Plaintext
184 lines
6.7 KiB
Plaintext
[/
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Copyright 2021 Peter Dimov
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Distributed under the Boost Software License, Version 1.0.
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https://boost.org/LICENSE_1_0.txt
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]
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[section:string_view string_view]
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[simplesect Authors]
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* Peter Dimov
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[endsimplesect]
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[section Header <boost/core/string_view.hpp>]
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The header `<boost/core/string_view.hpp>` defines `boost::core::string_view`,
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a portable and interoperable implementation of `std::string_view`.
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Unlike `boost::string_view`, `boost::core::string_view` has implicit
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conversions from and to `std::string_view`, which allows Boost libraries that
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support C++11/C++14 to use it in interfaces without forcing users to forgo the
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use of `std::string_view` in their code.
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[section Synopsis]
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``
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namespace boost
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{
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namespace core
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{
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template<class Ch> class basic_string_view
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{
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private:
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Ch const* data_;
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std::size_t size_;
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public:
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// types
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typedef std::char_traits<Ch> traits_type;
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typedef Ch value_type;
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typedef Ch* pointer;
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typedef Ch const* const_pointer;
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typedef Ch& reference;
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typedef Ch const& const_reference;
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typedef Ch const* const_iterator;
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typedef const_iterator iterator;
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typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
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typedef const_reverse_iterator reverse_iterator;
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typedef std::size_t size_type;
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typedef std::ptrdiff_t difference_type;
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// npos
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static constexpr size_type npos = static_cast<size_type>( -1 );
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public:
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// construction and assignment
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constexpr basic_string_view() noexcept;
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constexpr basic_string_view( basic_string_view const& ) noexcept = default;
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constexpr basic_string_view& operator=( basic_string_view const& ) noexcept & = default;
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constexpr basic_string_view( Ch const* str ) noexcept;
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constexpr basic_string_view( Ch const* str, size_type len ) noexcept;
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constexpr basic_string_view( Ch const* begin, Ch const* end ) noexcept;
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template<class A> basic_string_view(std::basic_string<Ch, std::char_traits<Ch>, A> const& str ) noexcept;
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basic_string_view(std::basic_string_view<Ch, std::char_traits<Ch>> const& str ) noexcept;
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// iterator support
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constexpr const_iterator begin() const noexcept;
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constexpr const_iterator end() const noexcept;
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constexpr const_iterator cbegin() const noexcept;
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constexpr const_iterator cend() const noexcept;
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constexpr const_reverse_iterator rbegin() const noexcept;
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constexpr const_reverse_iterator rend() const noexcept;
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constexpr const_reverse_iterator crbegin() const noexcept;
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constexpr const_reverse_iterator crend() const noexcept;
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// capacity
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constexpr size_type size() const noexcept;
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constexpr size_type length() const noexcept;
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constexpr size_type max_size() const noexcept;
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constexpr bool empty() const noexcept;
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// element access
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constexpr const_reference operator[]( size_type pos ) const noexcept;
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constexpr const_reference at( size_type pos ) const;
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constexpr const_reference front() const noexcept;
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constexpr const_reference back() const noexcept;
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constexpr const_pointer data() const noexcept;
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// modifiers
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constexpr void remove_prefix( size_type n ) noexcept;
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constexpr void remove_suffix( size_type n ) noexcept;
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constexpr void swap( basic_string_view& s ) noexcept;
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// string operations
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constexpr size_type copy( Ch* s, size_type n, size_type pos = 0 ) const;
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constexpr basic_string_view substr( size_type pos = 0, size_type n = npos ) const;
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constexpr int compare( basic_string_view s ) const noexcept;
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constexpr int compare( size_type pos1, size_type n1, basic_string_view s ) const;
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constexpr int compare( size_type pos1, size_type n1, basic_string_view s, size_type pos2, size_type n2 ) const;
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constexpr int compare( Ch const* s ) const;
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constexpr int compare( size_type pos1, size_type n1, Ch const* s ) const;
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constexpr int compare( size_type pos1, size_type n1, Ch const* s, size_type n2 ) const;
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constexpr bool starts_with( basic_string_view x ) const noexcept;
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constexpr bool starts_with( Ch x ) const noexcept;
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constexpr bool starts_with( Ch const* x ) const;
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constexpr bool ends_with( basic_string_view x ) const noexcept;
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constexpr bool ends_with( Ch x ) const noexcept;
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constexpr bool ends_with( Ch const* x ) const;
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// searching
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constexpr size_type find( basic_string_view s, size_type pos = 0 ) const noexcept;
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constexpr size_type find( Ch c, size_type pos = 0 ) const noexcept;
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constexpr size_type find( Ch const* s, size_type pos, size_type n ) const;
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constexpr size_type find( Ch const* s, size_type pos = 0 ) const;
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constexpr size_type rfind( basic_string_view s, size_type pos = npos ) const noexcept;
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constexpr size_type rfind( Ch c, size_type pos = npos ) const noexcept;
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constexpr size_type rfind( Ch const* s, size_type pos, size_type n ) const;
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constexpr size_type rfind( Ch const* s, size_type pos = npos ) const;
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constexpr size_type find_first_of( basic_string_view s, size_type pos = 0 ) const noexcept;
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constexpr size_type find_first_of( Ch c, size_type pos = 0 ) const noexcept;
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constexpr size_type find_first_of( Ch const* s, size_type pos, size_type n ) const;
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constexpr size_type find_first_of( Ch const* s, size_type pos = 0 ) const;
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constexpr size_type find_last_of( basic_string_view s, size_type pos = npos ) const noexcept;
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constexpr size_type find_last_of( Ch c, size_type pos = npos ) const noexcept;
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constexpr size_type find_last_of( Ch const* s, size_type pos, size_type n ) const;
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constexpr size_type find_last_of( Ch const* s, size_type pos = npos ) const;
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constexpr size_type find_first_not_of( basic_string_view s, size_type pos = 0 ) const noexcept;
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constexpr size_type find_first_not_of( Ch c, size_type pos = 0 ) const noexcept;
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constexpr size_type find_first_not_of( Ch const* s, size_type pos, size_type n ) const;
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constexpr size_type find_first_not_of( Ch const* s, size_type pos = 0 ) const;
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constexpr size_type find_last_not_of( basic_string_view s, size_type pos = npos ) const noexcept;
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constexpr size_type find_last_not_of( Ch c, size_type pos = npos ) const noexcept;
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constexpr size_type find_last_not_of( Ch const* s, size_type pos, size_type n ) const;
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constexpr size_type find_last_not_of( Ch const* s, size_type pos = npos ) const;
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};
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typedef basic_string_view<char> string_view;
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typedef basic_string_view<wchar_t> wstring_view;
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typedef basic_string_view<char16_t> u16string_view;
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typedef basic_string_view<char32_t> u32string_view;
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typedef basic_string_view<char8_t> u8string_view;
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} // namespace core
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} // namespace boost
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``
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[endsect]
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[section Construction]
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[section constexpr basic_string_view() noexcept;]
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* *Ensures:* `data() == 0`, `size() == 0`.
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[endsect]
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[endsect]
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[endsect]
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[endsect]
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