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@@ -0,0 +1,706 @@
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+///////////////////////////////////////////////////////////////////////////////
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+//
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+// Copyright (c) 2015 Microsoft Corporation. All rights reserved.
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+//
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+// This code is licensed under the MIT License (MIT).
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+//
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+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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+// THE SOFTWARE.
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+//
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+///////////////////////////////////////////////////////////////////////////////
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+
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+#ifndef GSL_STRING_SPAN_H
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+#define GSL_STRING_SPAN_H
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+
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+#include <gsl/gsl_assert> // for Ensures, Expects
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+#include <gsl/gsl_util> // for narrow_cast
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+#include <gsl/span_ext> // for operator!=, operator==, dynamic_extent
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+
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+#include <algorithm> // for equal, lexicographical_compare
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+#include <array> // for array
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+#include <cstddef> // for size_t, nullptr_t
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+#include <cstdint> // for PTRDIFF_MAX
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+#include <cstring>
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+#include <string> // for basic_string, allocator, char_traits
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+#include <type_traits> // for declval, is_convertible, enable_if_t, add_...
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+
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+#if defined(_MSC_VER) && !defined(__clang__)
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+#pragma warning(push)
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+
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+// Turn MSVC /analyze rules that generate too much noise. TODO: fix in the tool.
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+#pragma warning(disable : 26446) // TODO: bug in parser - attributes and templates
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+#pragma warning(disable : 26481) // TODO: suppress does not work inside templates sometimes
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+
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+#endif // _MSC_VER
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+
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+namespace gsl
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+{
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+//
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+// czstring and wzstring
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+//
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+// These are "tag" typedefs for C-style strings (i.e. null-terminated character arrays)
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+// that allow static analysis to help find bugs.
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+//
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+// There are no additional features/semantics that we can find a way to add inside the
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+// type system for these types that will not either incur significant runtime costs or
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+// (sometimes needlessly) break existing programs when introduced.
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+//
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+
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+template <typename CharT, std::size_t Extent = dynamic_extent>
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+using basic_zstring = CharT*;
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+
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+template <std::size_t Extent = dynamic_extent>
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+using czstring = basic_zstring<const char, Extent>;
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+
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+template <std::size_t Extent = dynamic_extent>
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+using cwzstring = basic_zstring<const wchar_t, Extent>;
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+
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+template <std::size_t Extent = dynamic_extent>
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+using cu16zstring = basic_zstring<const char16_t, Extent>;
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+
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+template <std::size_t Extent = dynamic_extent>
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+using cu32zstring = basic_zstring<const char32_t, Extent>;
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+
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+template <std::size_t Extent = dynamic_extent>
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+using zstring = basic_zstring<char, Extent>;
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+
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+template <std::size_t Extent = dynamic_extent>
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+using wzstring = basic_zstring<wchar_t, Extent>;
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+
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+template <std::size_t Extent = dynamic_extent>
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+using u16zstring = basic_zstring<char16_t, Extent>;
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+
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+template <std::size_t Extent = dynamic_extent>
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+using u32zstring = basic_zstring<char32_t, Extent>;
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+
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+namespace details
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+{
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+ template <class CharT>
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+ std::size_t string_length(const CharT* str, std::size_t n)
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+ {
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+ if (str == nullptr || n == dynamic_extent) return 0;
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+
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+ const span<const CharT> str_span{str, n};
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+
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+ std::size_t len = 0;
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+ while (len < n && str_span[len]) len++;
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+
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+ return len;
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+ }
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+} // namespace details
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+
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+//
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+// ensure_sentinel()
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+//
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+// Provides a way to obtain an span from a contiguous sequence
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+// that ends with a (non-inclusive) sentinel value.
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+//
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+// Will fail-fast if sentinel cannot be found before max elements are examined.
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+//
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+template <typename T, const T Sentinel>
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+span<T, dynamic_extent> ensure_sentinel(T* seq,
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+ std::size_t max = static_cast<std::size_t>(-1))
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+{
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+ Ensures(seq != nullptr);
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+
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+ GSL_SUPPRESS(
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+ f.23) // NO-FORMAT: attribute // TODO: false positive // TODO: suppress does not work
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+ auto cur = seq;
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+ Ensures(cur != nullptr); // workaround for removing the warning
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+
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+ GSL_SUPPRESS(bounds.1) // NO-FORMAT: attribute // TODO: suppress does not work
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+ while (static_cast<std::size_t>(cur - seq) < max && *cur != Sentinel) ++cur;
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+ Ensures(*cur == Sentinel);
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+ return {seq, static_cast<std::size_t>(cur - seq)};
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+}
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+
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+//
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+// ensure_z - creates a span for a zero terminated strings.
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+// Will fail fast if a null-terminator cannot be found before
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+// the limit of size_type.
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+//
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+template <typename CharT>
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+span<CharT, dynamic_extent> ensure_z(CharT* const& sz,
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+ std::size_t max = static_cast<std::size_t>(-1))
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+{
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+ return ensure_sentinel<CharT, CharT(0)>(sz, max);
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+}
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+
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+template <typename CharT, std::size_t N>
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+span<CharT, dynamic_extent> ensure_z(CharT (&sz)[N])
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+{
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+ return ensure_z(&sz[0], N);
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+}
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+
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+template <class Cont>
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+span<typename std::remove_pointer<typename Cont::pointer>::type, dynamic_extent>
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+ensure_z(Cont& cont)
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+{
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+ return ensure_z(cont.data(), cont.size());
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+}
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+
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+template <typename CharT, std::size_t>
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+class basic_string_span;
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+
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+namespace details
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+{
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+ template <typename T>
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+ struct is_basic_string_span_oracle : std::false_type
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+ {
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+ };
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+
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+ template <typename CharT, std::size_t Extent>
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+ struct is_basic_string_span_oracle<basic_string_span<CharT, Extent>> : std::true_type
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+ {
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+ };
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+
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+ template <typename T>
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+ struct is_basic_string_span : is_basic_string_span_oracle<std::remove_cv_t<T>>
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+ {
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+ };
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+} // namespace details
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+
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+//
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+// string_span and relatives
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+//
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+template <typename CharT, std::size_t Extent = dynamic_extent>
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+class basic_string_span
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+{
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+public:
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+ using element_type = CharT;
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+ using value_type = std::remove_cv_t<element_type>;
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+ using pointer = std::add_pointer_t<element_type>;
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+ using reference = std::add_lvalue_reference_t<element_type>;
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+ using const_reference = std::add_lvalue_reference_t<std::add_const_t<element_type>>;
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+ using impl_type = span<element_type, Extent>;
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+
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+ using size_type = typename impl_type::size_type;
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+ using iterator = typename impl_type::iterator;
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+ using reverse_iterator = typename impl_type::reverse_iterator;
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+
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+ // default (empty)
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+ constexpr basic_string_span() noexcept = default;
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+
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+ // copy
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+ constexpr basic_string_span(const basic_string_span& other) noexcept = default;
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+
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+ // assign
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+ constexpr basic_string_span& operator=(const basic_string_span& other) noexcept = default;
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+
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+ constexpr basic_string_span(pointer ptr, size_type length) : span_(ptr, length) {}
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+ constexpr basic_string_span(pointer firstElem, pointer lastElem) : span_(firstElem, lastElem) {}
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+
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+ // From static arrays - if 0-terminated, remove 0 from the view
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+ // All other containers allow 0s within the length, so we do not remove them
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+ template <std::size_t N>
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+ constexpr basic_string_span(element_type (&arr)[N]) : span_(remove_z(arr))
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+ {}
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+
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+ template <std::size_t N, class ArrayElementType = std::remove_const_t<element_type>>
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+ constexpr basic_string_span(std::array<ArrayElementType, N>& arr) noexcept : span_(arr)
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+ {}
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+
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+ template <std::size_t N, class ArrayElementType = std::remove_const_t<element_type>>
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+ constexpr basic_string_span(const std::array<ArrayElementType, N>& arr) noexcept : span_(arr)
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+ {}
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+
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+ // Container signature should work for basic_string after C++17 version exists
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+ template <class Traits, class Allocator>
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+ // GSL_SUPPRESS(bounds.4) // NO-FORMAT: attribute // TODO: parser bug
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+ constexpr basic_string_span(std::basic_string<element_type, Traits, Allocator>& str)
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+ : span_(&str[0], str.length())
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+ {}
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+
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+ template <class Traits, class Allocator>
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+ constexpr basic_string_span(const std::basic_string<element_type, Traits, Allocator>& str)
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+ : span_(&str[0], str.length())
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+ {}
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+
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+ // from containers. Containers must have a pointer type and data() function signatures
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+ template <class Container,
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+ class = std::enable_if_t<
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+ !details::is_basic_string_span<Container>::value &&
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+ std::is_convertible<typename Container::pointer, pointer>::value &&
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+ std::is_convertible<typename Container::pointer,
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+ decltype(std::declval<Container>().data())>::value>>
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+ constexpr basic_string_span(Container& cont) : span_(cont)
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+ {}
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+
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+ template <class Container,
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+ class = std::enable_if_t<
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+ !details::is_basic_string_span<Container>::value &&
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+ std::is_convertible<typename Container::pointer, pointer>::value &&
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+ std::is_convertible<typename Container::pointer,
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+ decltype(std::declval<Container>().data())>::value>>
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+ constexpr basic_string_span(const Container& cont) : span_(cont)
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+ {}
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+
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+ // from string_span
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+ template <
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+ class OtherValueType, std::size_t OtherExtent,
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+ class = std::enable_if_t<std::is_convertible<
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+ typename basic_string_span<OtherValueType, OtherExtent>::impl_type, impl_type>::value>>
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+ constexpr basic_string_span(basic_string_span<OtherValueType, OtherExtent> other)
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+ : span_(other.data(), other.length())
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+ {}
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+
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+ template <size_type Count>
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+ constexpr basic_string_span<element_type, Count> first() const
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+ {
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+ return {span_.template first<Count>()};
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+ }
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+
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+ constexpr basic_string_span<element_type, dynamic_extent> first(size_type count) const
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+ {
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+ return {span_.first(count)};
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+ }
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+
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+ template <size_type Count>
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+ constexpr basic_string_span<element_type, Count> last() const
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+ {
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+ return {span_.template last<Count>()};
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+ }
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+
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+ constexpr basic_string_span<element_type, dynamic_extent> last(size_type count) const
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+ {
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+ return {span_.last(count)};
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+ }
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+
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+ template <size_type Offset, size_type Count>
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+ constexpr basic_string_span<element_type, Count> subspan() const
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+ {
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+ return {span_.template subspan<Offset, Count>()};
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+ }
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+
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+ constexpr basic_string_span<element_type, dynamic_extent>
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+ subspan(size_type offset, size_type count = dynamic_extent) const
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+ {
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+ return {span_.subspan(offset, count)};
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+ }
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+
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+ constexpr reference operator[](size_type idx) const { return span_[idx]; }
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+ constexpr reference operator()(size_type idx) const { return span_[idx]; }
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+
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+ constexpr pointer data() const { return span_.data(); }
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+
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+ constexpr size_type length() const noexcept { return span_.size(); }
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+ constexpr size_type size() const noexcept { return span_.size(); }
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+ constexpr size_type size_bytes() const noexcept { return span_.size_bytes(); }
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+ constexpr size_type length_bytes() const noexcept { return span_.length_bytes(); }
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+ constexpr bool empty() const noexcept { return size() == 0; }
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+
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+ constexpr iterator begin() const noexcept { return span_.begin(); }
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+ constexpr iterator end() const noexcept { return span_.end(); }
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+
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+ constexpr reverse_iterator rbegin() const noexcept { return span_.rbegin(); }
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+ constexpr reverse_iterator rend() const noexcept { return span_.rend(); }
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+
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+private:
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+ static impl_type remove_z(pointer const& sz, std::size_t max)
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+ {
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+ return impl_type(sz, details::string_length(sz, max));
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+ }
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+
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+ template <std::size_t N>
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+ static impl_type remove_z(element_type (&sz)[N])
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+ {
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+ return remove_z(&sz[0], N);
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+ }
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+
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+ impl_type span_;
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+};
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+
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+template <std::size_t Extent = dynamic_extent>
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+using string_span = basic_string_span<char, Extent>;
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+
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+template <std::size_t Extent = dynamic_extent>
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+using cstring_span = basic_string_span<const char, Extent>;
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+
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+template <std::size_t Extent = dynamic_extent>
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+using wstring_span = basic_string_span<wchar_t, Extent>;
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+
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+template <std::size_t Extent = dynamic_extent>
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+using cwstring_span = basic_string_span<const wchar_t, Extent>;
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+
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+template <std::size_t Extent = dynamic_extent>
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+using u16string_span = basic_string_span<char16_t, Extent>;
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+
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+template <std::size_t Extent = dynamic_extent>
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+using cu16string_span = basic_string_span<const char16_t, Extent>;
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+
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+template <std::size_t Extent = dynamic_extent>
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+using u32string_span = basic_string_span<char32_t, Extent>;
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+
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+template <std::size_t Extent = dynamic_extent>
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+using cu32string_span = basic_string_span<const char32_t, Extent>;
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+
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+//
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+// to_string() allow (explicit) conversions from string_span to string
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+//
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+
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+template <typename CharT, std::size_t Extent>
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+std::basic_string<typename std::remove_const<CharT>::type>
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+to_string(basic_string_span<CharT, Extent> view)
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+{
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+ return {view.data(), narrow_cast<std::size_t>(view.length())};
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+}
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+
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+template <typename CharT, typename Traits = typename std::char_traits<CharT>,
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+ typename Allocator = std::allocator<CharT>, typename gCharT, std::size_t Extent>
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+std::basic_string<CharT, Traits, Allocator> to_basic_string(basic_string_span<gCharT, Extent> view)
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+{
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+ return {view.data(), narrow_cast<std::size_t>(view.length())};
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+}
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+
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+template <class ElementType, std::size_t Extent>
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+basic_string_span<const byte, details::calculate_byte_size<ElementType, Extent>::value>
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+as_bytes(basic_string_span<ElementType, Extent> s) noexcept
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+{
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+ GSL_SUPPRESS(type.1) // NO-FORMAT: attribute
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+ return {reinterpret_cast<const byte*>(s.data()), s.size_bytes()};
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+}
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+
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+template <class ElementType, std::size_t Extent,
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+ class = std::enable_if_t<!std::is_const<ElementType>::value>>
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+basic_string_span<byte, details::calculate_byte_size<ElementType, Extent>::value>
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+as_writable_bytes(basic_string_span<ElementType, Extent> s) noexcept
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+{
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+ GSL_SUPPRESS(type.1) // NO-FORMAT: attribute
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+ return {reinterpret_cast<byte*>(s.data()), s.size_bytes()};
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+}
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+
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+// zero-terminated string span, used to convert
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+// zero-terminated spans to legacy strings
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+template <typename CharT, std::size_t Extent = dynamic_extent>
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+class basic_zstring_span
|
|
|
+{
|
|
|
+public:
|
|
|
+ using value_type = CharT;
|
|
|
+ using const_value_type = std::add_const_t<CharT>;
|
|
|
+
|
|
|
+ using pointer = std::add_pointer_t<value_type>;
|
|
|
+ using const_pointer = std::add_pointer_t<const_value_type>;
|
|
|
+
|
|
|
+ using zstring_type = basic_zstring<value_type, Extent>;
|
|
|
+ using const_zstring_type = basic_zstring<const_value_type, Extent>;
|
|
|
+
|
|
|
+ using impl_type = span<value_type, Extent>;
|
|
|
+ using string_span_type = basic_string_span<value_type, Extent>;
|
|
|
+
|
|
|
+ constexpr basic_zstring_span(impl_type s) : span_(s)
|
|
|
+ {
|
|
|
+ // expects a zero-terminated span
|
|
|
+ Expects(s[s.size() - 1] == '\0');
|
|
|
+ }
|
|
|
+
|
|
|
+ // copy
|
|
|
+ constexpr basic_zstring_span(const basic_zstring_span& other) = default;
|
|
|
+
|
|
|
+ // move
|
|
|
+ constexpr basic_zstring_span(basic_zstring_span&& other) = default;
|
|
|
+
|
|
|
+ // assign
|
|
|
+ constexpr basic_zstring_span& operator=(const basic_zstring_span& other) = default;
|
|
|
+
|
|
|
+ // move assign
|
|
|
+ constexpr basic_zstring_span& operator=(basic_zstring_span&& other) = default;
|
|
|
+
|
|
|
+ constexpr bool empty() const noexcept { return span_.size() == 0; }
|
|
|
+
|
|
|
+ constexpr string_span_type as_string_span() const noexcept
|
|
|
+ {
|
|
|
+ const auto sz = span_.size();
|
|
|
+ return {span_.data(), sz > 1 ? sz - 1 : 0};
|
|
|
+ }
|
|
|
+ constexpr string_span_type ensure_z() const { return gsl::ensure_z(span_); }
|
|
|
+
|
|
|
+ constexpr const_zstring_type assume_z() const noexcept { return span_.data(); }
|
|
|
+
|
|
|
+private:
|
|
|
+ impl_type span_;
|
|
|
+};
|
|
|
+
|
|
|
+template <std::size_t Max = dynamic_extent>
|
|
|
+using zstring_span = basic_zstring_span<char, Max>;
|
|
|
+
|
|
|
+template <std::size_t Max = dynamic_extent>
|
|
|
+using wzstring_span = basic_zstring_span<wchar_t, Max>;
|
|
|
+
|
|
|
+template <std::size_t Max = dynamic_extent>
|
|
|
+using u16zstring_span = basic_zstring_span<char16_t, Max>;
|
|
|
+
|
|
|
+template <std::size_t Max = dynamic_extent>
|
|
|
+using u32zstring_span = basic_zstring_span<char32_t, Max>;
|
|
|
+
|
|
|
+template <std::size_t Max = dynamic_extent>
|
|
|
+using czstring_span = basic_zstring_span<const char, Max>;
|
|
|
+
|
|
|
+template <std::size_t Max = dynamic_extent>
|
|
|
+using cwzstring_span = basic_zstring_span<const wchar_t, Max>;
|
|
|
+
|
|
|
+template <std::size_t Max = dynamic_extent>
|
|
|
+using cu16zstring_span = basic_zstring_span<const char16_t, Max>;
|
|
|
+
|
|
|
+template <std::size_t Max = dynamic_extent>
|
|
|
+using cu32zstring_span = basic_zstring_span<const char32_t, Max>;
|
|
|
+
|
|
|
+// operator ==
|
|
|
+template <class CharT, std::size_t Extent, class T,
|
|
|
+ class = std::enable_if_t<
|
|
|
+ details::is_basic_string_span<T>::value ||
|
|
|
+ std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>>>::value>>
|
|
|
+bool operator==(const gsl::basic_string_span<CharT, Extent>& one, const T& other)
|
|
|
+{
|
|
|
+ const gsl::basic_string_span<std::add_const_t<CharT>> tmp(other);
|
|
|
+ return std::equal(one.begin(), one.end(), tmp.begin(), tmp.end());
|
|
|
+}
|
|
|
+
|
|
|
+template <class CharT, std::size_t Extent, class T,
|
|
|
+ class = std::enable_if_t<
|
|
|
+ !details::is_basic_string_span<T>::value &&
|
|
|
+ std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>>>::value>>
|
|
|
+bool operator==(const T& one, const gsl::basic_string_span<CharT, Extent>& other)
|
|
|
+{
|
|
|
+ const gsl::basic_string_span<std::add_const_t<CharT>> tmp(one);
|
|
|
+ return std::equal(tmp.begin(), tmp.end(), other.begin(), other.end());
|
|
|
+}
|
|
|
+
|
|
|
+// operator !=
|
|
|
+template <typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
|
|
+ typename = std::enable_if_t<std::is_convertible<
|
|
|
+ T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
|
|
|
+bool operator!=(gsl::basic_string_span<CharT, Extent> one, const T& other)
|
|
|
+{
|
|
|
+ return !(one == other);
|
|
|
+}
|
|
|
+
|
|
|
+template <
|
|
|
+ typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
|
|
+ typename = std::enable_if_t<
|
|
|
+ std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
|
|
|
+ !gsl::details::is_basic_string_span<T>::value>>
|
|
|
+bool operator!=(const T& one, gsl::basic_string_span<CharT, Extent> other)
|
|
|
+{
|
|
|
+ return !(one == other);
|
|
|
+}
|
|
|
+
|
|
|
+// operator<
|
|
|
+template <typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
|
|
+ typename = std::enable_if_t<std::is_convertible<
|
|
|
+ T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
|
|
|
+bool operator<(gsl::basic_string_span<CharT, Extent> one, const T& other)
|
|
|
+{
|
|
|
+ const gsl::basic_string_span<std::add_const_t<CharT>, Extent> tmp(other);
|
|
|
+ return std::lexicographical_compare(one.begin(), one.end(), tmp.begin(), tmp.end());
|
|
|
+}
|
|
|
+
|
|
|
+template <
|
|
|
+ typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
|
|
+ typename = std::enable_if_t<
|
|
|
+ std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
|
|
|
+ !gsl::details::is_basic_string_span<T>::value>>
|
|
|
+bool operator<(const T& one, gsl::basic_string_span<CharT, Extent> other)
|
|
|
+{
|
|
|
+ gsl::basic_string_span<std::add_const_t<CharT>, Extent> tmp(one);
|
|
|
+ return std::lexicographical_compare(tmp.begin(), tmp.end(), other.begin(), other.end());
|
|
|
+}
|
|
|
+
|
|
|
+#ifndef _MSC_VER
|
|
|
+
|
|
|
+// VS treats temp and const containers as convertible to basic_string_span,
|
|
|
+// so the cases below are already covered by the previous operators
|
|
|
+
|
|
|
+template <
|
|
|
+ typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
|
|
+ typename DataType = typename T::value_type,
|
|
|
+ typename = std::enable_if_t<
|
|
|
+ !gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
|
|
|
+ std::is_convertible<DataType*, CharT*>::value &&
|
|
|
+ std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
|
|
|
+ DataType>::value>>
|
|
|
+bool operator<(gsl::basic_string_span<CharT, Extent> one, const T& other)
|
|
|
+{
|
|
|
+ gsl::basic_string_span<std::add_const_t<CharT>, Extent> tmp(other);
|
|
|
+ return std::lexicographical_compare(one.begin(), one.end(), tmp.begin(), tmp.end());
|
|
|
+}
|
|
|
+
|
|
|
+template <
|
|
|
+ typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
|
|
+ typename DataType = typename T::value_type,
|
|
|
+ typename = std::enable_if_t<
|
|
|
+ !gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
|
|
|
+ std::is_convertible<DataType*, CharT*>::value &&
|
|
|
+ std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
|
|
|
+ DataType>::value>>
|
|
|
+bool operator<(const T& one, gsl::basic_string_span<CharT, Extent> other)
|
|
|
+{
|
|
|
+ gsl::basic_string_span<std::add_const_t<CharT>, Extent> tmp(one);
|
|
|
+ return std::lexicographical_compare(tmp.begin(), tmp.end(), other.begin(), other.end());
|
|
|
+}
|
|
|
+#endif
|
|
|
+
|
|
|
+// operator <=
|
|
|
+template <typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
|
|
+ typename = std::enable_if_t<std::is_convertible<
|
|
|
+ T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
|
|
|
+bool operator<=(gsl::basic_string_span<CharT, Extent> one, const T& other)
|
|
|
+{
|
|
|
+ return !(other < one);
|
|
|
+}
|
|
|
+
|
|
|
+template <
|
|
|
+ typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
|
|
+ typename = std::enable_if_t<
|
|
|
+ std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
|
|
|
+ !gsl::details::is_basic_string_span<T>::value>>
|
|
|
+bool operator<=(const T& one, gsl::basic_string_span<CharT, Extent> other)
|
|
|
+{
|
|
|
+ return !(other < one);
|
|
|
+}
|
|
|
+
|
|
|
+#ifndef _MSC_VER
|
|
|
+
|
|
|
+// VS treats temp and const containers as convertible to basic_string_span,
|
|
|
+// so the cases below are already covered by the previous operators
|
|
|
+
|
|
|
+template <
|
|
|
+ typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
|
|
+ typename DataType = typename T::value_type,
|
|
|
+ typename = std::enable_if_t<
|
|
|
+ !gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
|
|
|
+ std::is_convertible<DataType*, CharT*>::value &&
|
|
|
+ std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
|
|
|
+ DataType>::value>>
|
|
|
+bool operator<=(gsl::basic_string_span<CharT, Extent> one, const T& other)
|
|
|
+{
|
|
|
+ return !(other < one);
|
|
|
+}
|
|
|
+
|
|
|
+template <
|
|
|
+ typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
|
|
+ typename DataType = typename T::value_type,
|
|
|
+ typename = std::enable_if_t<
|
|
|
+ !gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
|
|
|
+ std::is_convertible<DataType*, CharT*>::value &&
|
|
|
+ std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
|
|
|
+ DataType>::value>>
|
|
|
+bool operator<=(const T& one, gsl::basic_string_span<CharT, Extent> other)
|
|
|
+{
|
|
|
+ return !(other < one);
|
|
|
+}
|
|
|
+#endif
|
|
|
+
|
|
|
+// operator>
|
|
|
+template <typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
|
|
+ typename = std::enable_if_t<std::is_convertible<
|
|
|
+ T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
|
|
|
+bool operator>(gsl::basic_string_span<CharT, Extent> one, const T& other)
|
|
|
+{
|
|
|
+ return other < one;
|
|
|
+}
|
|
|
+
|
|
|
+template <
|
|
|
+ typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
|
|
+ typename = std::enable_if_t<
|
|
|
+ std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
|
|
|
+ !gsl::details::is_basic_string_span<T>::value>>
|
|
|
+bool operator>(const T& one, gsl::basic_string_span<CharT, Extent> other)
|
|
|
+{
|
|
|
+ return other < one;
|
|
|
+}
|
|
|
+
|
|
|
+#ifndef _MSC_VER
|
|
|
+
|
|
|
+// VS treats temp and const containers as convertible to basic_string_span,
|
|
|
+// so the cases below are already covered by the previous operators
|
|
|
+
|
|
|
+template <
|
|
|
+ typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
|
|
+ typename DataType = typename T::value_type,
|
|
|
+ typename = std::enable_if_t<
|
|
|
+ !gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
|
|
|
+ std::is_convertible<DataType*, CharT*>::value &&
|
|
|
+ std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
|
|
|
+ DataType>::value>>
|
|
|
+bool operator>(gsl::basic_string_span<CharT, Extent> one, const T& other)
|
|
|
+{
|
|
|
+ return other < one;
|
|
|
+}
|
|
|
+
|
|
|
+template <
|
|
|
+ typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
|
|
+ typename DataType = typename T::value_type,
|
|
|
+ typename = std::enable_if_t<
|
|
|
+ !gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
|
|
|
+ std::is_convertible<DataType*, CharT*>::value &&
|
|
|
+ std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
|
|
|
+ DataType>::value>>
|
|
|
+bool operator>(const T& one, gsl::basic_string_span<CharT, Extent> other)
|
|
|
+{
|
|
|
+ return other < one;
|
|
|
+}
|
|
|
+#endif
|
|
|
+
|
|
|
+// operator >=
|
|
|
+template <typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
|
|
+ typename = std::enable_if_t<std::is_convertible<
|
|
|
+ T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
|
|
|
+bool operator>=(gsl::basic_string_span<CharT, Extent> one, const T& other)
|
|
|
+{
|
|
|
+ return !(one < other);
|
|
|
+}
|
|
|
+
|
|
|
+template <
|
|
|
+ typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
|
|
+ typename = std::enable_if_t<
|
|
|
+ std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
|
|
|
+ !gsl::details::is_basic_string_span<T>::value>>
|
|
|
+bool operator>=(const T& one, gsl::basic_string_span<CharT, Extent> other)
|
|
|
+{
|
|
|
+ return !(one < other);
|
|
|
+}
|
|
|
+
|
|
|
+#ifndef _MSC_VER
|
|
|
+
|
|
|
+// VS treats temp and const containers as convertible to basic_string_span,
|
|
|
+// so the cases below are already covered by the previous operators
|
|
|
+
|
|
|
+template <
|
|
|
+ typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
|
|
+ typename DataType = typename T::value_type,
|
|
|
+ typename = std::enable_if_t<
|
|
|
+ !gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
|
|
|
+ std::is_convertible<DataType*, CharT*>::value &&
|
|
|
+ std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
|
|
|
+ DataType>::value>>
|
|
|
+bool operator>=(gsl::basic_string_span<CharT, Extent> one, const T& other)
|
|
|
+{
|
|
|
+ return !(one < other);
|
|
|
+}
|
|
|
+
|
|
|
+template <
|
|
|
+ typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
|
|
+ typename DataType = typename T::value_type,
|
|
|
+ typename = std::enable_if_t<
|
|
|
+ !gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
|
|
|
+ std::is_convertible<DataType*, CharT*>::value &&
|
|
|
+ std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
|
|
|
+ DataType>::value>>
|
|
|
+bool operator>=(const T& one, gsl::basic_string_span<CharT, Extent> other)
|
|
|
+{
|
|
|
+ return !(one < other);
|
|
|
+}
|
|
|
+#endif
|
|
|
+} // namespace gsl
|
|
|
+
|
|
|
+#if defined(_MSC_VER) && !defined(__clang__)
|
|
|
+#pragma warning(pop)
|
|
|
+
|
|
|
+#endif // _MSC_VER
|
|
|
+
|
|
|
+#endif // GSL_STRING_SPAN_H
|
Sven Czarnian