mirror of
https://github.com/microsoft/GSL.git
synced 2024-11-03 17:56:43 -05:00
merging with master
This commit is contained in:
Anna Gringauze
parent
8e744b2671
commit
e3878a6556
@ -52,7 +52,7 @@
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#define GSL_MSVC_NO_SUPPORT_FOR_MOVE_CTOR_DEFAULT
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// noexcept is not understood
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#ifndef GSL_THROWS_ON_CONTRACT_VIOLATION
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#ifndef GSL_THROW_ON_CONTRACT_VIOLATION
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#pragma push_macro("noexcept")
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#define noexcept /* nothing */
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#endif
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@ -23,15 +23,37 @@
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#include "span.h"
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#include <cstring>
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// VS 2013 workarounds
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#ifdef _MSC_VER
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// No MSVC does constexpr fully yet
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#pragma push_macro("constexpr")
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#define constexpr /* nothing */
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// VS 2013 workarounds
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#if _MSC_VER <= 1800
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#define GSL_MSVC_HAS_TYPE_DEDUCTION_BUG
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// noexcept is not understood
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#ifndef GSL_THROW_ON_CONTRACT_VIOLATION
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#pragma push_macro("noexcept")
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#define noexcept /* nothing */
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#endif
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#endif // _MSC_VER <= 1800
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#endif // _MSC_VER
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// In order to test the library, we need it to throw exceptions that we can catch
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#ifdef GSL_THROW_ON_CONTRACT_VIOLATION
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#ifdef _MSC_VER
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#pragma push_macro("noexcept")
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#endif
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#define noexcept /* nothing */
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#endif // GSL_THROW_ON_CONTRACT_VIOLATION
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namespace gsl
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{
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//
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@ -56,27 +78,6 @@ using zstring = char*;
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template<std::ptrdiff_t Extent = dynamic_range>
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using wzstring = wchar_t*;
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//
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// string_span and relatives
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//
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// Note that Extent is always single-dimension only
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//
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template <class CharT, std::ptrdiff_t Extent = dynamic_range>
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using basic_string_span = span<CharT, Extent>;
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template<std::ptrdiff_t Extent = dynamic_range>
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using string_span = basic_string_span<char, Extent>;
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template<std::ptrdiff_t Extent = dynamic_range>
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using cstring_span = basic_string_span<const char, Extent>;
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template<std::ptrdiff_t Extent = dynamic_range>
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using wstring_span = basic_string_span<wchar_t, Extent>;
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template<std::ptrdiff_t Extent = dynamic_range>
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using cwstring_span = basic_string_span<const wchar_t, Extent>;
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//
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// ensure_sentinel()
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//
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@ -86,7 +87,7 @@ using cwstring_span = basic_string_span<const wchar_t, Extent>;
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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<class T, const T Sentinel>
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span<T, dynamic_range> ensure_sentinel(const T* seq, std::ptrdiff_t max = PTRDIFF_MAX)
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span<T, dynamic_range> ensure_sentinel(T* seq, std::ptrdiff_t max = PTRDIFF_MAX)
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{
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auto cur = seq;
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while ((cur - seq) < max && *cur != Sentinel) ++cur;
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@ -101,46 +102,341 @@ span<T, dynamic_range> ensure_sentinel(const T* seq, std::ptrdiff_t max = PTRDIF
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// the limit of size_type.
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//
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template<class T>
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inline basic_string_span<T, dynamic_range> ensure_z(T* const & sz, std::ptrdiff_t max = PTRDIFF_MAX)
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inline span<T, dynamic_range> ensure_z(T* const & sz, std::ptrdiff_t max = PTRDIFF_MAX)
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{
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return ensure_sentinel<T, 0>(sz, max);
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}
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// TODO (neilmac) there is probably a better template-magic way to get the const and non-const overloads to share an implementation
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inline basic_string_span<char, dynamic_range> ensure_z(char* const& sz, std::ptrdiff_t max)
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inline span<char, dynamic_range> ensure_z(char* const& sz, std::ptrdiff_t max)
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{
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auto len = strnlen(sz, max);
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Ensures(sz[len] == 0);
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return{ sz, static_cast<std::ptrdiff_t>(len) };
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}
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inline basic_string_span<const char, dynamic_range> ensure_z(const char* const& sz, std::ptrdiff_t max)
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inline span<const char, dynamic_range> ensure_z(const char* const& sz, std::ptrdiff_t max)
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{
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auto len = strnlen(sz, max);
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Ensures(sz[len] == 0); return{ sz, static_cast<std::ptrdiff_t>(len) };
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}
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inline basic_string_span<wchar_t, dynamic_range> ensure_z(wchar_t* const& sz, std::ptrdiff_t max)
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inline span<wchar_t, dynamic_range> ensure_z(wchar_t* const& sz, std::ptrdiff_t max)
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{
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auto len = wcsnlen(sz, max);
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Ensures(sz[len] == 0); return{ sz, static_cast<std::ptrdiff_t>(len) };
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}
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inline basic_string_span<const wchar_t, dynamic_range> ensure_z(const wchar_t* const& sz, std::ptrdiff_t max)
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inline span<const wchar_t, dynamic_range> ensure_z(const wchar_t* const& sz, std::ptrdiff_t max)
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{
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auto len = wcsnlen(sz, max);
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Ensures(sz[len] == 0); return{ sz, static_cast<std::ptrdiff_t>(len) };
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}
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template<class T, size_t N>
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basic_string_span<T, dynamic_range> ensure_z(T(&sz)[N]) { return ensure_z(&sz[0], static_cast<std::ptrdiff_t>(N)); }
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span<T, dynamic_range> ensure_z(T(&sz)[N]) { return ensure_z(&sz[0], static_cast<std::ptrdiff_t>(N)); }
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template<class Cont>
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basic_string_span<typename std::remove_pointer<typename Cont::pointer>::type, dynamic_range> ensure_z(Cont& cont)
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span<typename std::remove_pointer<typename Cont::pointer>::type, dynamic_range> ensure_z(Cont& cont)
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{
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return ensure_z(cont.data(), static_cast<std::ptrdiff_t>(cont.length()));
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}
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// TODO (neilmac) there is probably a better template-magic way to get the const and non-const overloads to share an implementation
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inline span<char, dynamic_range> remove_z(char* const& sz, std::ptrdiff_t max)
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{
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auto len = strnlen(sz, max);
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return{ sz, static_cast<std::ptrdiff_t>(len) };
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}
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inline span<const char, dynamic_range> remove_z(const char* const& sz, std::ptrdiff_t max)
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{
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auto len = strnlen(sz, max);
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return{ sz, static_cast<std::ptrdiff_t>(len) };
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}
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inline span<wchar_t, dynamic_range> remove_z(wchar_t* const& sz, std::ptrdiff_t max)
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{
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auto len = wcsnlen(sz, max);
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return{ sz, static_cast<std::ptrdiff_t>(len) };
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}
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inline span<const wchar_t, dynamic_range> remove_z(const wchar_t* const& sz, std::ptrdiff_t max)
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{
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auto len = wcsnlen(sz, max);
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return{ sz, static_cast<std::ptrdiff_t>(len) };
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}
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template<class T, size_t N>
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span<T, dynamic_range> remove_z(T(&sz)[N])
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{
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return remove_z(&sz[0], static_cast<std::ptrdiff_t>(N));
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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_range> remove_z(Cont& cont)
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{
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return remove_z(cont.data(), static_cast<std::ptrdiff_t>(cont.length()));
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}
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template<typename ValueType, std::ptrdiff_t>
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class basic_string_span;
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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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template <typename ValueType, std::ptrdiff_t Extent>
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struct is_basic_string_span_oracle<basic_string_span<ValueType, Extent>> : std::true_type
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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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//
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// string_span and relatives
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//
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// Note that Extent is always single-dimension only
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//
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template <class CharT, std::ptrdiff_t Extent = dynamic_range>
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class basic_string_span
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{
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using value_type = CharT;
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using const_value_type = std::add_const_t<value_type>;
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using pointer = std::add_pointer_t<value_type>;
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using reference = std::add_lvalue_reference_t<value_type>;
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using const_reference = std::add_lvalue_reference_t<const_value_type>;
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using bounds_type = static_bounds<Extent>;
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using underlying_type = span<value_type, Extent>;
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public:
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using size_type = ptrdiff_t;
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using iterator = typename underlying_type::iterator;
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using const_iterator = typename underlying_type::const_iterator;
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using reverse_iterator = typename underlying_type::reverse_iterator;
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using const_reverse_iterator = typename underlying_type::const_reverse_iterator;
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// empty
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constexpr basic_string_span() noexcept
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: real(nullptr)
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{}
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// copy
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constexpr basic_string_span(const basic_string_span& other) noexcept
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: real(other.real)
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{}
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// move
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constexpr basic_string_span(const basic_string_span&& other) noexcept
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: real(std::move(other.real))
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{}
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// from nullptr and length
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constexpr basic_string_span(nullptr_t ptr, size_type length) noexcept
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: real(ptr, length)
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{}
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// For pointers and static arrays - if 0-terminated, remove 0 from the view
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// from c string
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constexpr basic_string_span(pointer& ptr) noexcept
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: real(ensure_z(ptr))
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{}
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// from non-const pointer to const span
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template<typename Dummy = std::enable_if_t<std::is_const<value_type>::value>>
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constexpr basic_string_span(std::remove_const_t<value_type>*& ptr) noexcept
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: real(ensure_z(ptr))
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{}
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// from raw data and length - remove 0 if needed
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constexpr basic_string_span(pointer ptr, size_type length) noexcept
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: real(remove_z(ptr, length))
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{}
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// from static arrays and string literals
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template<size_t N>
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constexpr basic_string_span(value_type(&arr)[N]) noexcept
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: real(remove_z(arr))
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{}
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// Those allow 0s in the middle, so we keep them
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constexpr basic_string_span(std::string& s) noexcept
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: real(&(s.at(0)), static_cast<ptrdiff_t>(s.length()))
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{}
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// from containers. It must have .size() and .data() function signatures
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template <typename Cont, typename DataType = typename Cont::value_type,
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typename Dummy = std::enable_if_t<!details::is_span<Cont>::value
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&& !details::is_basic_string_span<Cont>::value
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&& !(!std::is_const<value_type>::value && std::is_const<Cont>::value) // no converting const containers to non-const span
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&& std::is_convertible<DataType*, value_type*>::value
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&& std::is_same<std::decay_t<decltype(std::declval<Cont>().size(), *std::declval<Cont>().data())>, DataType>::value>
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>
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constexpr basic_string_span(Cont& cont)
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: real(cont.data(), cont.size())
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{}
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// from span
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template <typename OtherValueType, std::ptrdiff_t OtherExtent,
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typename OtherBounds = static_bounds<OtherExtent>,
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typename Dummy = std::enable_if_t<std::is_convertible<OtherValueType*, value_type*>::value && std::is_convertible<OtherBounds, bounds_type>::value>
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>
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constexpr basic_string_span(const span<OtherValueType, OtherExtent>& other) noexcept
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: real(other)
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{}
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// from string_span
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template <typename OtherValueType, std::ptrdiff_t OtherExtent,
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typename OtherBounds = static_bounds<OtherExtent>,
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typename Dummy = std::enable_if_t<std::is_convertible<OtherValueType*, value_type*>::value && std::is_convertible<OtherBounds, bounds_type>::value>
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>
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constexpr basic_string_span(const basic_string_span<OtherValueType, OtherExtent>& other) noexcept
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: real(other.data(), other.length())
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{}
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// section on linear space
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template<size_type Count>
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constexpr basic_string_span<value_type, Count> first() const noexcept
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{
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return{ real.first<Count>() };
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}
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constexpr basic_string_span<value_type, dynamic_range> first(size_type count) const noexcept
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{
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return{ real.first(count); }
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}
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template<size_type Count>
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constexpr basic_string_span<value_type, Count> last() const noexcept
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{
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return{ real.last<Count>() };
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}
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constexpr basic_string_span<value_type, dynamic_range> last(size_type count) const noexcept
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{
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return{ real.last(count); }
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}
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template<size_type Offset, size_type Count>
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constexpr basic_string_span<value_type, Count> sub() const noexcept
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{
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return{ real.sub<Count>() };
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}
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constexpr basic_string_span<value_type, dynamic_range> sub(size_type offset, size_type count = dynamic_range) const noexcept
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{
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return{ real.sub(offset, count) };
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}
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constexpr const_reference operator[](size_type idx) const noexcept
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{
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return real[idx];
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}
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constexpr reference operator[](size_type idx) noexcept
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{
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return real[idx];
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}
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constexpr pointer data() const noexcept
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{
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return real.data();
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}
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constexpr size_type length() const noexcept
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{
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return real.size();
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}
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constexpr size_type size() const noexcept
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{
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return real.size();
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}
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constexpr size_type used_length() const noexcept
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{
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return length();
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}
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constexpr size_type bytes() const noexcept
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{
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return real.bytes();
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}
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constexpr size_type used_bytes() const noexcept
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{
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return bytes();
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}
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constexpr explicit operator bool() const noexcept
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{
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return real;
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}
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constexpr iterator begin() const noexcept
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{
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return real.begin();
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}
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constexpr iterator end() const noexcept
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{
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return real.end();
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}
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constexpr const_iterator cbegin() const noexcept
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{
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return real.cbegin();
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}
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constexpr const_iterator cend() const noexcept
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{
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real.cend();
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}
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constexpr reverse_iterator rbegin() const noexcept
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{
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return real.rbegin();
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}
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constexpr reverse_iterator rend() const noexcept
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{
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return real.rend();
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}
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constexpr const_reverse_iterator crbegin() const noexcept
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{
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return real.crbegin();
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}
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|
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constexpr const_reverse_iterator crend() const noexcept
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{
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return real.crend();
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}
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private:
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span<CharT, Extent> real;
|
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};
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|
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template<std::ptrdiff_t Extent = dynamic_range>
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using string_span = basic_string_span<char, Extent>;
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template<std::ptrdiff_t Extent = dynamic_range>
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using cstring_span = basic_string_span<const char, Extent>;
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template<std::ptrdiff_t Extent = dynamic_range>
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using wstring_span = basic_string_span<wchar_t, Extent>;
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template<std::ptrdiff_t Extent = dynamic_range>
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using cwstring_span = basic_string_span<const wchar_t, Extent>;
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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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@ -213,14 +509,89 @@ template <size_t Max = dynamic_range>
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using wzstring_builder = basic_zstring_builder<wchar_t, Max>;
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}
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constexpr bool operator==(const gsl::cstring_span<>& one, const gsl::cstring_span<>& other) noexcept
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{
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return std::equal(one.begin(), one.end(), other.begin(), other.end());
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}
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|
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constexpr bool operator==(const gsl::string_span<>& one, const gsl::string_span<>& other) noexcept
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{
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return std::equal(one.begin(), one.end(), other.begin(), other.end());
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}
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// TODO: ca we make twmplate ops work?
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//template <typename ValueType, std::ptrdiff_t Extent>
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//constexpr bool operator==(const gsl::basic_string_span<ValueType, Extent>& one, const gsl::basic_string_span<ValueType, Extent>& other) noexcept
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//{
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// return std::equal(one.begin(), one.end(), other.begin(), other.end());
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//}
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/*
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template <typename ValueType, std::ptrdiff_t Extent, typename OtherValueType, std::ptrdiff_t OtherExtent, typename Dummy = std::enable_if_t<std::is_same<std::remove_cv_t<ValueType>, std::remove_cv_t<OtherValueType>>::value>>
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constexpr bool operator==(const gsl::basic_string_span<ValueType, Extent>& one, const gsl::basic_string_span<OtherValueType, OtherExtent>& other) noexcept
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{
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return std::equal(one.begin(), one.end(), other.begin(), other.end());
|
||||
}
|
||||
|
||||
template <typename ValueType, std::ptrdiff_t Extent, typename OtherValueType, std::ptrdiff_t OtherExtent, typename Dummy = std::enable_if_t<std::is_same<std::remove_cv_t<ValueType>, std::remove_cv_t<OtherValueType>>::value>>
|
||||
constexpr bool operator!=(const gsl::basic_string_span<ValueType, Extent>& one, const gsl::basic_string_span<OtherValueType, OtherExtent>& other) noexcept
|
||||
{
|
||||
return !(one == other);
|
||||
}
|
||||
|
||||
template <typename ValueType, std::ptrdiff_t Extent, typename OtherValueType, std::ptrdiff_t OtherExtent, typename Dummy = std::enable_if_t<std::is_same<std::remove_cv_t<ValueType>, std::remove_cv_t<OtherValueType>>::value>>
|
||||
constexpr bool operator<(const gsl::basic_string_span<ValueType, Extent>& one, const gsl::basic_string_span<OtherValueType, OtherExtent>& other) noexcept
|
||||
{
|
||||
return std::lexicographical_compare(one.begin(), one.end(), other.begin(), other.end());
|
||||
}
|
||||
|
||||
template <typename ValueType, std::ptrdiff_t Extent, typename OtherValueType, std::ptrdiff_t OtherExtent, typename Dummy = std::enable_if_t<std::is_same<std::remove_cv_t<ValueType>, std::remove_cv_t<OtherValueType>>::value>>
|
||||
constexpr bool operator<=(const gsl::basic_string_span<ValueType, Extent>& one, const gsl::basic_string_span<OtherValueType, OtherExtent>& other) noexcept
|
||||
{
|
||||
return !(other < one);
|
||||
}
|
||||
|
||||
template <typename ValueType, std::ptrdiff_t Extent, typename OtherValueType, std::ptrdiff_t OtherExtent, typename Dummy = std::enable_if_t<std::is_same<std::remove_cv_t<ValueType>, std::remove_cv_t<OtherValueType>>::value>>
|
||||
constexpr bool operator>(const gsl::basic_string_span<ValueType, Extent>& one, const gsl::basic_string_span<OtherValueType, OtherExtent>& other) noexcept
|
||||
{
|
||||
return other < one;
|
||||
}
|
||||
|
||||
template <typename ValueType, std::ptrdiff_t Extent, typename OtherValueType, std::ptrdiff_t OtherExtent, typename Dummy = std::enable_if_t<std::is_same<std::remove_cv_t<ValueType>, std::remove_cv_t<OtherValueType>>::value>>
|
||||
constexpr bool operator>=(const gsl::basic_string_span<ValueType, Extent>& one, const gsl::basic_string_span<OtherValueType, OtherExtent>& other) noexcept
|
||||
{
|
||||
return !(one < other);
|
||||
}
|
||||
*/
|
||||
// VS 2013 workarounds
|
||||
#ifdef _MSC_VER
|
||||
|
||||
#undef constexpr
|
||||
#pragma pop_macro("constexpr")
|
||||
|
||||
#if _MSC_VER <= 1800
|
||||
|
||||
#pragma warning(pop)
|
||||
|
||||
#ifndef GSL_THROW_ON_CONTRACT_VIOLATION
|
||||
#undef noexcept
|
||||
#pragma pop_macro("noexcept")
|
||||
#endif // GSL_THROW_ON_CONTRACT_VIOLATION
|
||||
|
||||
#undef GSL_MSVC_HAS_TYPE_DEDUCTION_BUG
|
||||
|
||||
#endif // _MSC_VER <= 1800
|
||||
#endif // _MSC_VER
|
||||
|
||||
#if defined(GSL_THROW_ON_CONTRACT_VIOLATION)
|
||||
|
||||
#undef noexcept
|
||||
|
||||
#ifdef _MSC_VER
|
||||
#pragma pop_macro("noexcept")
|
||||
#endif
|
||||
|
||||
#endif // GSL_THROW_ON_CONTRACT_VIOLATION
|
||||
|
||||
#endif // GSL_STRING_SPAN_H
|
||||
|
||||
@ -18,6 +18,8 @@
|
||||
#include <string_span.h>
|
||||
#include <vector>
|
||||
#include <cstdlib>
|
||||
#include <map>
|
||||
#include <unordered_map>
|
||||
|
||||
using namespace std;
|
||||
using namespace gsl;
|
||||
@ -62,7 +64,7 @@ SUITE(string_span_tests)
|
||||
|
||||
{
|
||||
cwstring_span<> v = stack_string;
|
||||
CHECK(v.length() == 6);
|
||||
CHECK(v.length() == 5);
|
||||
}
|
||||
|
||||
{
|
||||
@ -72,7 +74,7 @@ SUITE(string_span_tests)
|
||||
|
||||
{
|
||||
wstring_span<> v = stack_string;
|
||||
CHECK(v.length() == 6);
|
||||
CHECK(v.length() == 5);
|
||||
}
|
||||
}
|
||||
|
||||
@ -113,6 +115,391 @@ SUITE(string_span_tests)
|
||||
CHECK(static_cast<cstring_span<>::size_type>(s2.length()) == v.length());
|
||||
CHECK(s2.length() == 5);
|
||||
}
|
||||
|
||||
TEST(ComparisonAndImplicitConstructors)
|
||||
{
|
||||
{
|
||||
cstring_span<> span = "Hello";
|
||||
|
||||
const char ar[] = { 'H', 'e', 'l', 'l', 'o' };
|
||||
const char ar1[] = "Hello";
|
||||
const char ar2[10] = "Hello";
|
||||
const char* ptr = "Hello";
|
||||
const std::string str = "Hello";
|
||||
const std::vector<char> vec = { 'H', 'e', 'l', 'l', 'o' };
|
||||
|
||||
// comparison to literal
|
||||
CHECK(span == cstring_span<>("Hello"));
|
||||
|
||||
// comparison to static array with no null termination
|
||||
CHECK(span == cstring_span<>(ar));
|
||||
|
||||
// comparison to static array with null at the end
|
||||
CHECK(span == cstring_span<>(ar1));
|
||||
|
||||
// comparison to static array with null in the middle
|
||||
CHECK(span == cstring_span<>(ar2));
|
||||
|
||||
// comparison to null-terminated c string
|
||||
CHECK(span == cstring_span<>(ptr, 5));
|
||||
|
||||
// comparison to string
|
||||
CHECK(span == cstring_span<>(str));
|
||||
|
||||
// comparison to vector of charaters with no null termination
|
||||
CHECK(span == cstring_span<>(vec));
|
||||
|
||||
// comparison of the original data to string
|
||||
CHECK(span.data() == std::string("Hello"));
|
||||
|
||||
CHECK(span == "Hello");
|
||||
CHECK(span == ar);
|
||||
CHECK(span == ar1);
|
||||
CHECK(span == ar2);
|
||||
CHECK(span == ptr);
|
||||
CHECK(span == str);
|
||||
CHECK(span == vec);
|
||||
|
||||
char _ar[] = { 'H', 'e', 'l', 'l', 'o' };
|
||||
char _ar1[] = "Hello";
|
||||
char _ar2[10] = "Hello";
|
||||
char* _ptr = _ar1;
|
||||
std::string _str = "Hello";
|
||||
std::vector<char> _vec = { 'H', 'e', 'l', 'l', 'o' };
|
||||
|
||||
CHECK(span == _ar);
|
||||
CHECK(span == _ar1);
|
||||
CHECK(span == _ar2);
|
||||
CHECK(span == _ptr);
|
||||
CHECK(span == _str);
|
||||
CHECK(span == _vec);
|
||||
|
||||
string_span<> _span{ _ptr };
|
||||
|
||||
CHECK(_span == _ar);
|
||||
CHECK(_span == _ar1);
|
||||
CHECK(_span == _ar2);
|
||||
CHECK(_span == _ptr);
|
||||
CHECK(_span == _str);
|
||||
CHECK(_span == _vec);
|
||||
|
||||
CHECK(_span == "Hello");
|
||||
CHECK(_span == ar);
|
||||
CHECK(_span == ar1);
|
||||
CHECK(_span == ar2);
|
||||
CHECK(_span == ptr);
|
||||
CHECK(_span == str);
|
||||
CHECK(_span == vec);
|
||||
}
|
||||
|
||||
{
|
||||
std::vector<char> str1 = { 'H', 'e', 'l', 'l', 'o' };
|
||||
cstring_span<> span1 = str1;
|
||||
std::vector<char> str2 = std::move(str1);
|
||||
cstring_span<> span2 = str2;
|
||||
|
||||
// comparison of spans from the same vector before and after move (ok)
|
||||
CHECK(span1 == span2);
|
||||
}
|
||||
}
|
||||
|
||||
TEST(EnzureRemoveZ)
|
||||
{
|
||||
// remove z from literals
|
||||
{
|
||||
cstring_span<> sp = "hello";
|
||||
CHECK((sp.length() == 5));
|
||||
}
|
||||
|
||||
// take the string as is
|
||||
{
|
||||
auto str = std::string("hello");
|
||||
cstring_span<> sp = str;
|
||||
CHECK((sp.length() == 5));
|
||||
}
|
||||
|
||||
// ensure z on c strings
|
||||
{
|
||||
char* ptr = new char[3];
|
||||
|
||||
ptr[0] = 'a';
|
||||
ptr[1] = 'b';
|
||||
ptr[2] = '\0';
|
||||
|
||||
string_span<> span(ptr);
|
||||
CHECK(span.length() == 2);
|
||||
|
||||
delete[] ptr;
|
||||
}
|
||||
|
||||
// ensuze z on c strings
|
||||
{
|
||||
char* ptr = new char[2];
|
||||
|
||||
ptr[0] = 'a';
|
||||
ptr[1] = 'b';
|
||||
|
||||
// do we want to have a constructor from pointer at all?
|
||||
// the behavior is unpredictable if the string is not 0-terminated
|
||||
|
||||
// CHECK_THROW((string_span<>(ptr).length() == 2), fail_fast);
|
||||
|
||||
cstring_span<> sp1{ ptr, 2 }; // good
|
||||
cstring_span<> sp2{ ptr, 3 }; // bad... but can't help there
|
||||
|
||||
CHECK(sp1[1] == 'b');
|
||||
CHECK_THROW((sp1[2] == 'c'), fail_fast);
|
||||
|
||||
CHECK(sp2[1] == 'b');
|
||||
//CHECK_THROW((sp1[2] == 'c'), fail_fast); // buffer overflow
|
||||
|
||||
delete[] ptr;
|
||||
}
|
||||
}
|
||||
|
||||
TEST(Constructors)
|
||||
{
|
||||
// from string temporary
|
||||
#ifdef CONFIRM_COMPILATION_ERRORS
|
||||
{
|
||||
cstring_span<> span = std::string("Hello");
|
||||
}
|
||||
#endif
|
||||
|
||||
// from string literal
|
||||
{
|
||||
cstring_span<> span = "Hello";
|
||||
CHECK(span.length() == 5);
|
||||
}
|
||||
|
||||
// from const static array
|
||||
{
|
||||
const char ar[] = { 'H', 'e', 'l', 'l', 'o' };
|
||||
cstring_span<> span = ar;
|
||||
CHECK(span.length() == 5);
|
||||
}
|
||||
|
||||
// from non-const static array
|
||||
{
|
||||
char ar[] = { 'H', 'e', 'l', 'l', 'o' };
|
||||
cstring_span<> span = ar;
|
||||
CHECK(span.length() == 5);
|
||||
}
|
||||
|
||||
// from const ptr and length
|
||||
{
|
||||
const char* ptr = "Hello";
|
||||
cstring_span<> span{ ptr, 5 };
|
||||
CHECK(span.length() == 5);
|
||||
}
|
||||
|
||||
// from non-const ptr and length
|
||||
{
|
||||
char* ptr = "Hello";
|
||||
cstring_span<> span{ ptr, 5 };
|
||||
CHECK(span.length() == 5);
|
||||
}
|
||||
|
||||
// from const string
|
||||
{
|
||||
const std::string str = "Hello";
|
||||
cstring_span<> span = str;
|
||||
CHECK(span.length() == 5);
|
||||
}
|
||||
|
||||
// from non-const string
|
||||
{
|
||||
std::string str = "Hello";
|
||||
cstring_span<> span = str;
|
||||
CHECK(span.length() == 5);
|
||||
}
|
||||
|
||||
// from const vector
|
||||
{
|
||||
const std::vector<char> vec = { 'H', 'e', 'l', 'l', 'o' };
|
||||
cstring_span<> span = vec;
|
||||
CHECK(span.length() == 5);
|
||||
}
|
||||
|
||||
// from non-const vector
|
||||
{
|
||||
std::vector<char> vec = { 'H', 'e', 'l', 'l', 'o' };
|
||||
cstring_span<> span = vec;
|
||||
CHECK(span.length() == 5);
|
||||
}
|
||||
|
||||
// from const span
|
||||
{
|
||||
std::vector<char> vec = { 'H', 'e', 'l', 'l', 'o' };
|
||||
const span<const char> inner = vec;
|
||||
cstring_span<> span = inner;
|
||||
CHECK(span.length() == 5);
|
||||
}
|
||||
|
||||
// from non-const span
|
||||
{
|
||||
std::vector<char> vec = { 'H', 'e', 'l', 'l', 'o' };
|
||||
span<char> inner = vec;
|
||||
cstring_span<> span = inner;
|
||||
CHECK(span.length() == 5);
|
||||
}
|
||||
|
||||
// from const string_span
|
||||
{
|
||||
std::vector<char> vec = { 'H', 'e', 'l', 'l', 'o' };
|
||||
cstring_span<> tmp = vec;
|
||||
cstring_span<> span = tmp;
|
||||
CHECK(span.length() == 5);
|
||||
}
|
||||
|
||||
// from non-const string_span
|
||||
{
|
||||
std::vector<char> vec = { 'H', 'e', 'l', 'l', 'o' };
|
||||
string_span<> tmp = vec;
|
||||
cstring_span<> span = tmp;
|
||||
CHECK(span.length() == 5);
|
||||
}
|
||||
|
||||
///////////////////////////////////////////////////
|
||||
// How string_span should behave with const data
|
||||
|
||||
// from string literal
|
||||
{
|
||||
#ifdef CONFIRM_COMPILATION_ERRORS
|
||||
string_span<> span = "Hello";
|
||||
CHECK(span.length() == 5);
|
||||
#endif
|
||||
}
|
||||
|
||||
// from const static array
|
||||
{
|
||||
#ifdef CONFIRM_COMPILATION_ERRORS
|
||||
const char ar[] = { 'H', 'e', 'l', 'l', 'o' };
|
||||
string_span<> span = ar;
|
||||
CHECK(span.length() == 5);
|
||||
#endif
|
||||
}
|
||||
|
||||
// from non-const static array
|
||||
{
|
||||
char ar[] = { 'H', 'e', 'l', 'l', 'o' };
|
||||
string_span<> span = ar;
|
||||
CHECK(span.length() == 5);
|
||||
}
|
||||
|
||||
// from const ptr and length
|
||||
{
|
||||
#ifdef CONFIRM_COMPILATION_ERRORS
|
||||
const char* ptr = "Hello";
|
||||
string_span<> span{ ptr, 5 };
|
||||
CHECK(span.length() == 5);
|
||||
#endif
|
||||
}
|
||||
|
||||
// from non-const ptr and length
|
||||
{
|
||||
char* ptr = "Hello";
|
||||
string_span<> span{ ptr, 5 };
|
||||
CHECK(span.length() == 5);
|
||||
}
|
||||
|
||||
// from const string
|
||||
{
|
||||
#ifdef CONFIRM_COMPILATION_ERRORS
|
||||
const std::string str = "Hello";
|
||||
string_span<> span = str;
|
||||
CHECK(span.length() == 5);
|
||||
#endif
|
||||
}
|
||||
|
||||
// from non-const string
|
||||
{
|
||||
std::string str = "Hello";
|
||||
string_span<> span = str;
|
||||
CHECK(span.length() == 5);
|
||||
}
|
||||
|
||||
// from const vector
|
||||
{
|
||||
#ifdef CONFIRM_COMPILATION_ERRORS
|
||||
const std::vector<char> vec = { 'H', 'e', 'l', 'l', 'o' };
|
||||
string_span<> span = vec;
|
||||
CHECK(span.length() == 5);
|
||||
#endif
|
||||
}
|
||||
|
||||
// from non-const vector
|
||||
{
|
||||
std::vector<char> vec = { 'H', 'e', 'l', 'l', 'o' };
|
||||
string_span<> span = vec;
|
||||
CHECK(span.length() == 5);
|
||||
}
|
||||
|
||||
// from const span
|
||||
{
|
||||
#ifdef CONFIRM_COMPILATION_ERRORS
|
||||
std::vector<char> vec = { 'H', 'e', 'l', 'l', 'o' };
|
||||
const span<const char> inner = vec;
|
||||
string_span<> span = inner;
|
||||
CHECK(span.length() == 5);
|
||||
#endif
|
||||
}
|
||||
|
||||
// from non-const span
|
||||
{
|
||||
std::vector<char> vec = { 'H', 'e', 'l', 'l', 'o' };
|
||||
span<char> inner = vec;
|
||||
string_span<> span = inner;
|
||||
CHECK(span.length() == 5);
|
||||
}
|
||||
|
||||
// from non-const span of non-const data from const vector (looks like a bug)
|
||||
{
|
||||
#ifdef CONFIRM_COMPILATION_ERRORS
|
||||
const std::vector<char> vec = { 'H', 'e', 'l', 'l', 'o' };
|
||||
const span<char> inner = vec; // fix error (happens inside the constructor)
|
||||
string_span<> span = inner;
|
||||
CHECK(span.length() == 5);
|
||||
#endif
|
||||
}
|
||||
|
||||
// from const string_span
|
||||
{
|
||||
#ifdef CONFIRM_COMPILATION_ERRORS
|
||||
std::vector<char> vec = { 'H', 'e', 'l', 'l', 'o' };
|
||||
cstring_span<> tmp = vec;
|
||||
string_span<> span = tmp;
|
||||
CHECK(span.length() == 5);
|
||||
#endif
|
||||
}
|
||||
|
||||
// from non-const string_span
|
||||
{
|
||||
std::vector<char> vec = { 'H', 'e', 'l', 'l', 'o' };
|
||||
string_span<> tmp = vec;
|
||||
string_span<> span = tmp;
|
||||
CHECK(span.length() == 5);
|
||||
}
|
||||
|
||||
// from non-const string_span from const vector
|
||||
{
|
||||
#ifdef CONFIRM_COMPILATION_ERRORS
|
||||
const std::vector<char> vec = { 'H', 'e', 'l', 'l', 'o' };
|
||||
string_span<> tmp = vec;
|
||||
string_span<> span = tmp;
|
||||
CHECK(span.length() == 5);
|
||||
#endif
|
||||
}
|
||||
|
||||
// from const string_span of non-const data
|
||||
{
|
||||
std::vector<char> vec = { 'H', 'e', 'l', 'l', 'o' };
|
||||
const string_span<> tmp = vec; // what does "const span" mean?
|
||||
string_span<> span = tmp;
|
||||
CHECK(span.length() == 5);
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
int main(int, const char *[])
|
||||
|
||||
Loading…
Reference in New Issue
Block a user