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Merge pull request #614 from neilmacintosh/remove-nullptr-t-ctor

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Remove from-nullptr_t constructor from span
This commit is contained in:
Anna Gringauze 2018-02-11 22:34:46 -08:00 committed by GitHub
commit a03fde29b9
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4 changed files with 120 additions and 175 deletions
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20
include/gsl/span
View File

@ -128,7 +128,7 @@ namespace details
constexpr span_iterator(const Span* span, typename Span::index_type index) GSL_NOEXCEPT
: span_(span), index_(index)
{
Expects(span == nullptr || (0 <= index_ && index <= span_->length()));
Expects(span == nullptr || (0 <= index_ && index <= span_->size()));
}
friend span_iterator<Span, true>;
@ -140,19 +140,19 @@ namespace details
constexpr reference operator*() const GSL_NOEXCEPT
{
Expects(index_ != span_->length());
Expects(index_ != span_->size());
return *(span_->data() + index_);
}
constexpr pointer operator->() const GSL_NOEXCEPT
{
Expects(index_ != span_->length());
Expects(index_ != span_->size());
return span_->data() + index_;
}
constexpr span_iterator& operator++() GSL_NOEXCEPT
{
Expects(0 <= index_ && index_ != span_->length());
Expects(0 <= index_ && index_ != span_->size());
++index_;
return *this;
}
@ -166,7 +166,7 @@ namespace details
constexpr span_iterator& operator--() GSL_NOEXCEPT
{
Expects(index_ != 0 && index_ <= span_->length());
Expects(index_ != 0 && index_ <= span_->size());
--index_;
return *this;
}
@ -186,7 +186,7 @@ namespace details
constexpr span_iterator& operator+=(difference_type n) GSL_NOEXCEPT
{
Expects((index_ + n) >= 0 && (index_ + n) <= span_->length());
Expects((index_ + n) >= 0 && (index_ + n) <= span_->size());
index_ += n;
return *this;
}
@ -341,8 +341,6 @@ public:
{
}
constexpr span(std::nullptr_t) GSL_NOEXCEPT : span() {}
constexpr span(pointer ptr, index_type count) : storage_(ptr, count) {}
constexpr span(pointer firstElem, pointer lastElem)
@ -461,9 +459,7 @@ public:
// [span.obs], span observers
constexpr index_type length() const GSL_NOEXCEPT { return size(); }
constexpr index_type size() const GSL_NOEXCEPT { return storage_.size(); }
constexpr index_type length_bytes() const GSL_NOEXCEPT { return size_bytes(); }
constexpr index_type size_bytes() const GSL_NOEXCEPT
{
return size() * narrow_cast<index_type>(sizeof(element_type));
@ -483,10 +479,10 @@ public:
// [span.iter], span iterator support
constexpr iterator begin() const GSL_NOEXCEPT { return {this, 0}; }
constexpr iterator end() const GSL_NOEXCEPT { return {this, length()}; }
constexpr iterator end() const GSL_NOEXCEPT { return {this, size()}; }
constexpr const_iterator cbegin() const GSL_NOEXCEPT { return {this, 0}; }
constexpr const_iterator cend() const GSL_NOEXCEPT { return {this, length()}; }
constexpr const_iterator cend() const GSL_NOEXCEPT { return {this, size()}; }
constexpr reverse_iterator rbegin() const GSL_NOEXCEPT { return reverse_iterator{end()}; }
constexpr reverse_iterator rend() const GSL_NOEXCEPT { return reverse_iterator{begin()}; }

5
include/gsl/string_span
View File

@ -145,7 +145,7 @@ template <class Cont>
span<typename std::remove_pointer<typename Cont::pointer>::type, dynamic_extent>
ensure_z(Cont& cont)
{
return ensure_z(cont.data(), static_cast<std::ptrdiff_t>(cont.length()));
return ensure_z(cont.data(), static_cast<std::ptrdiff_t>(cont.size()));
}
template <typename CharT, std::ptrdiff_t>
@ -203,9 +203,6 @@ public:
// move assign
constexpr basic_string_span& operator=(basic_string_span&& other) GSL_NOEXCEPT = default;
// from nullptr
constexpr basic_string_span(std::nullptr_t ptr) GSL_NOEXCEPT : span_(ptr) {}
constexpr basic_string_span(pointer ptr, index_type length) : span_(ptr, length) {}
constexpr basic_string_span(pointer firstElem, pointer lastElem) : span_(firstElem, lastElem) {}

264
tests/span_tests.cpp
View File

@ -51,33 +51,33 @@ TEST_CASE("default_constructor")
{
{
span<int> s;
CHECK((s.length() == 0 && s.data() == nullptr));
CHECK((s.size() == 0 && s.data() == nullptr));
span<const int> cs;
CHECK((cs.length() == 0 && cs.data() == nullptr));
CHECK((cs.size() == 0 && cs.data() == nullptr));
}
{
span<int, 0> s;
CHECK((s.length() == 0 && s.data() == nullptr));
CHECK((s.size() == 0 && s.data() == nullptr));
span<const int, 0> cs;
CHECK((cs.length() == 0 && cs.data() == nullptr));
CHECK((cs.size() == 0 && cs.data() == nullptr));
}
{
#ifdef CONFIRM_COMPILATION_ERRORS
span<int, 1> s;
CHECK((s.length() == 1 && s.data() == nullptr)); // explains why it can't compile
CHECK((s.size() == 1 && s.data() == nullptr)); // explains why it can't compile
#endif
}
{
span<int> s{};
CHECK((s.length() == 0 && s.data() == nullptr));
CHECK((s.size() == 0 && s.data() == nullptr));
span<const int> cs{};
CHECK((cs.length() == 0 && cs.data() == nullptr));
CHECK((cs.size() == 0 && cs.data() == nullptr));
}
}
@ -94,64 +94,22 @@ TEST_CASE("size_optimization")
}
}
TEST_CASE("from_nullptr_constructor")
{
{
span<int> s = nullptr;
CHECK((s.length() == 0 && s.data() == nullptr));
span<const int> cs = nullptr;
CHECK((cs.length() == 0 && cs.data() == nullptr));
}
{
span<int, 0> s = nullptr;
CHECK((s.length() == 0 && s.data() == nullptr));
span<const int, 0> cs = nullptr;
CHECK((cs.length() == 0 && cs.data() == nullptr));
}
{
#ifdef CONFIRM_COMPILATION_ERRORS
span<int, 1> s = nullptr;
CHECK((s.length() == 1 && s.data() == nullptr)); // explains why it can't compile
#endif
}
{
span<int> s{nullptr};
CHECK((s.length() == 0 && s.data() == nullptr));
span<const int> cs{nullptr};
CHECK((cs.length() == 0 && cs.data() == nullptr));
}
{
span<int*> s{nullptr};
CHECK((s.length() == 0 && s.data() == nullptr));
span<const int*> cs{nullptr};
CHECK((cs.length() == 0 && cs.data() == nullptr));
}
}
TEST_CASE("from_nullptr_length_constructor")
TEST_CASE("from_nullptr_size_constructor")
{
{
span<int> s{nullptr, static_cast<span<int>::index_type>(0)};
CHECK((s.length() == 0 && s.data() == nullptr));
CHECK((s.size() == 0 && s.data() == nullptr));
span<const int> cs{nullptr, static_cast<span<int>::index_type>(0)};
CHECK((cs.length() == 0 && cs.data() == nullptr));
CHECK((cs.size() == 0 && cs.data() == nullptr));
}
{
span<int, 0> s{nullptr, static_cast<span<int>::index_type>(0)};
CHECK((s.length() == 0 && s.data() == nullptr));
CHECK((s.size() == 0 && s.data() == nullptr));
span<const int, 0> cs{nullptr, static_cast<span<int>::index_type>(0)};
CHECK((cs.length() == 0 && cs.data() == nullptr));
CHECK((cs.size() == 0 && cs.data() == nullptr));
}
{
@ -179,10 +137,10 @@ TEST_CASE("from_nullptr_length_constructor")
{
span<int*> s{nullptr, static_cast<span<int>::index_type>(0)};
CHECK((s.length() == 0 && s.data() == nullptr));
CHECK((s.size() == 0 && s.data() == nullptr));
span<const int*> cs{nullptr, static_cast<span<int>::index_type>(0)};
CHECK((cs.length() == 0 && cs.data() == nullptr));
CHECK((cs.size() == 0 && cs.data() == nullptr));
}
}
@ -195,7 +153,7 @@ TEST_CASE("from_pointer_length_constructor")
{
{
span<int> s = { &arr[0], i };
CHECK(s.length() == i);
CHECK(s.size() == i);
CHECK(s.data() == &arr[0]);
CHECK(s.empty() == (i == 0));
for (int j = 0; j < i; ++j)
@ -207,7 +165,7 @@ TEST_CASE("from_pointer_length_constructor")
}
{
span<int> s = { &arr[i], 4-i };
CHECK(s.length() == 4-i);
CHECK(s.size() == 4-i);
CHECK(s.data() == &arr[i]);
CHECK(s.empty() == (4-i == 0));
for (int j = 0; j < 4-i; ++j)
@ -222,14 +180,14 @@ TEST_CASE("from_pointer_length_constructor")
{
span<int, 2> s{&arr[0], 2};
CHECK((s.length() == 2 && s.data() == &arr[0]));
CHECK((s.size() == 2 && s.data() == &arr[0]));
CHECK((s[0] == 1 && s[1] == 2));
}
{
int* p = nullptr;
span<int> s{p, static_cast<span<int>::index_type>(0)};
CHECK((s.length() == 0 && s.data() == nullptr));
CHECK((s.size() == 0 && s.data() == nullptr));
}
{
@ -240,14 +198,14 @@ TEST_CASE("from_pointer_length_constructor")
{
auto s = make_span(&arr[0], 2);
CHECK((s.length() == 2 && s.data() == &arr[0]));
CHECK((s.size() == 2 && s.data() == &arr[0]));
CHECK((s[0] == 1 && s[1] == 2));
}
{
int* p = nullptr;
auto s = make_span(p, static_cast<span<int>::index_type>(0));
CHECK((s.length() == 0 && s.data() == nullptr));
CHECK((s.size() == 0 && s.data() == nullptr));
}
{
@ -263,24 +221,24 @@ TEST_CASE("from_pointer_pointer_constructor")
{
span<int> s{&arr[0], &arr[2]};
CHECK((s.length() == 2 && s.data() == &arr[0]));
CHECK((s.size() == 2 && s.data() == &arr[0]));
CHECK((s[0] == 1 && s[1] == 2));
}
{
span<int, 2> s{&arr[0], &arr[2]};
CHECK((s.length() == 2 && s.data() == &arr[0]));
CHECK((s.size() == 2 && s.data() == &arr[0]));
CHECK((s[0] == 1 && s[1] == 2));
}
{
span<int> s{&arr[0], &arr[0]};
CHECK((s.length() == 0 && s.data() == &arr[0]));
CHECK((s.size() == 0 && s.data() == &arr[0]));
}
{
span<int, 0> s{&arr[0], &arr[0]};
CHECK((s.length() == 0 && s.data() == &arr[0]));
CHECK((s.size() == 0 && s.data() == &arr[0]));
}
// this will fail the std::distance() precondition, which asserts on MSVC debug builds
@ -299,13 +257,13 @@ TEST_CASE("from_pointer_pointer_constructor")
{
int* p = nullptr;
span<int> s{p, p};
CHECK((s.length() == 0 && s.data() == nullptr));
CHECK((s.size() == 0 && s.data() == nullptr));
}
{
int* p = nullptr;
span<int, 0> s{p, p};
CHECK((s.length() == 0 && s.data() == nullptr));
CHECK((s.size() == 0 && s.data() == nullptr));
}
// this will fail the std::distance() precondition, which asserts on MSVC debug builds
@ -317,19 +275,19 @@ TEST_CASE("from_pointer_pointer_constructor")
{
auto s = make_span(&arr[0], &arr[2]);
CHECK((s.length() == 2 && s.data() == &arr[0]));
CHECK((s.size() == 2 && s.data() == &arr[0]));
CHECK((s[0] == 1 && s[1] == 2));
}
{
auto s = make_span(&arr[0], &arr[0]);
CHECK((s.length() == 0 && s.data() == &arr[0]));
CHECK((s.size() == 0 && s.data() == &arr[0]));
}
{
int* p = nullptr;
auto s = make_span(p, p);
CHECK((s.length() == 0 && s.data() == nullptr));
CHECK((s.size() == 0 && s.data() == nullptr));
}
}
@ -339,12 +297,12 @@ TEST_CASE("from_array_constructor")
{
span<int> s{arr};
CHECK((s.length() == 5 && s.data() == &arr[0]));
CHECK((s.size() == 5 && s.data() == &arr[0]));
}
{
span<int, 5> s{arr};
CHECK((s.length() == 5 && s.data() == &arr[0]));
CHECK((s.size() == 5 && s.data() == &arr[0]));
}
int arr2d[2][3] = {1, 2, 3, 4, 5, 6};
@ -356,18 +314,18 @@ TEST_CASE("from_array_constructor")
{
span<int, 0> s{arr};
CHECK((s.length() == 0 && s.data() == &arr[0]));
CHECK((s.size() == 0 && s.data() == &arr[0]));
}
{
span<int> s{arr2d};
CHECK((s.length() == 6 && s.data() == &arr2d[0][0]));
CHECK((s.size() == 6 && s.data() == &arr2d[0][0]));
CHECK((s[0] == 1 && s[5] == 6));
}
{
span<int, 0> s{arr2d};
CHECK((s.length() == 0 && s.data() == &arr2d[0][0]));
CHECK((s.size() == 0 && s.data() == &arr2d[0][0]));
}
{
@ -376,7 +334,7 @@ TEST_CASE("from_array_constructor")
#endif
{
span<int[3]> s{&(arr2d[0]), 1};
CHECK((s.length() == 1 && s.data() == &arr2d[0]));
CHECK((s.size() == 1 && s.data() == &arr2d[0]));
}
int arr3d[2][3][2] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12};
@ -384,13 +342,13 @@ TEST_CASE("from_array_constructor")
#ifdef CONFIRM_COMPILATION_ERRORS
{
span<int> s{arr3d};
CHECK((s.length() == 12 && s.data() == &arr3d[0][0][0]));
CHECK((s.size() == 12 && s.data() == &arr3d[0][0][0]));
CHECK((s[0] == 1 && s[11] == 12));
}
{
span<int, 0> s{arr3d};
CHECK((s.length() == 0 && s.data() == &arr3d[0][0][0]));
CHECK((s.size() == 0 && s.data() == &arr3d[0][0][0]));
}
{
@ -399,28 +357,28 @@ TEST_CASE("from_array_constructor")
{
span<int, 12> s{arr3d};
CHECK((s.length() == 12 && s.data() == &arr3d[0][0][0]));
CHECK((s.size() == 12 && s.data() == &arr3d[0][0][0]));
CHECK((s[0] == 1 && s[5] == 6));
}
#endif
{
span<int[3][2]> s{&arr3d[0], 1};
CHECK((s.length() == 1 && s.data() == &arr3d[0]));
CHECK((s.size() == 1 && s.data() == &arr3d[0]));
}
{
auto s = make_span(arr);
CHECK((s.length() == 5 && s.data() == &arr[0]));
CHECK((s.size() == 5 && s.data() == &arr[0]));
}
{
auto s = make_span(&(arr2d[0]), 1);
CHECK((s.length() == 1 && s.data() == &arr2d[0]));
CHECK((s.size() == 1 && s.data() == &arr2d[0]));
}
{
auto s = make_span(&arr3d[0], 1);
CHECK((s.length() == 1 && s.data() == &arr3d[0]));
CHECK((s.size() == 1 && s.data() == &arr3d[0]));
}
}
@ -430,12 +388,12 @@ TEST_CASE("from_dynamic_array_constructor")
{
span<double> s(&arr[0][0][0], 10);
CHECK((s.length() == 10 && s.data() == &arr[0][0][0]));
CHECK((s.size() == 10 && s.data() == &arr[0][0][0]));
}
{
auto s = make_span(&arr[0][0][0], 10);
CHECK((s.length() == 10 && s.data() == &arr[0][0][0]));
CHECK((s.size() == 10 && s.data() == &arr[0][0][0]));
}
delete[] arr;
@ -723,17 +681,17 @@ TEST_CASE("copy_move_and_assignment")
int arr[] = {3, 4, 5};
span<const int> s2 = arr;
CHECK((s2.length() == 3 && s2.data() == &arr[0]));
CHECK((s2.size() == 3 && s2.data() == &arr[0]));
s2 = s1;
CHECK(s2.empty());
auto get_temp_span = [&]() -> span<int> { return {&arr[1], 2}; };
auto use_span = [&](span<const int> s) { CHECK((s.length() == 2 && s.data() == &arr[1])); };
auto use_span = [&](span<const int> s) { CHECK((s.size() == 2 && s.data() == &arr[1])); };
use_span(get_temp_span());
s1 = get_temp_span();
CHECK((s1.length() == 2 && s1.data() == &arr[1]));
CHECK((s1.size() == 2 && s1.data() == &arr[1]));
}
TEST_CASE("first")
@ -742,35 +700,35 @@ TEST_CASE("first")
{
span<int, 5> av = arr;
CHECK(av.first<2>().length() == 2);
CHECK(av.first(2).length() == 2);
CHECK(av.first<2>().size() == 2);
CHECK(av.first(2).size() == 2);
}
{
span<int, 5> av = arr;
CHECK(av.first<0>().length() == 0);
CHECK(av.first(0).length() == 0);
CHECK(av.first<0>().size() == 0);
CHECK(av.first(0).size() == 0);
}
{
span<int, 5> av = arr;
CHECK(av.first<5>().length() == 5);
CHECK(av.first(5).length() == 5);
CHECK(av.first<5>().size() == 5);
CHECK(av.first(5).size() == 5);
}
{
span<int, 5> av = arr;
#ifdef CONFIRM_COMPILATION_ERRORS
CHECK(av.first<6>().length() == 6);
CHECK(av.first<-1>().length() == -1);
CHECK(av.first<6>().size() == 6);
CHECK(av.first<-1>().size() == -1);
#endif
CHECK_THROWS_AS(av.first(6).length(), fail_fast);
CHECK_THROWS_AS(av.first(6).size(), fail_fast);
}
{
span<int> av;
CHECK(av.first<0>().length() == 0);
CHECK(av.first(0).length() == 0);
CHECK(av.first<0>().size() == 0);
CHECK(av.first(0).size() == 0);
}
}
@ -780,34 +738,34 @@ TEST_CASE("last")
{
span<int, 5> av = arr;
CHECK(av.last<2>().length() == 2);
CHECK(av.last(2).length() == 2);
CHECK(av.last<2>().size() == 2);
CHECK(av.last(2).size() == 2);
}
{
span<int, 5> av = arr;
CHECK(av.last<0>().length() == 0);
CHECK(av.last(0).length() == 0);
CHECK(av.last<0>().size() == 0);
CHECK(av.last(0).size() == 0);
}
{
span<int, 5> av = arr;
CHECK(av.last<5>().length() == 5);
CHECK(av.last(5).length() == 5);
CHECK(av.last<5>().size() == 5);
CHECK(av.last(5).size() == 5);
}
{
span<int, 5> av = arr;
#ifdef CONFIRM_COMPILATION_ERRORS
CHECK(av.last<6>().length() == 6);
CHECK(av.last<6>().size() == 6);
#endif
CHECK_THROWS_AS(av.last(6).length(), fail_fast);
CHECK_THROWS_AS(av.last(6).size(), fail_fast);
}
{
span<int> av;
CHECK(av.last<0>().length() == 0);
CHECK(av.last(0).length() == 0);
CHECK(av.last<0>().size() == 0);
CHECK(av.last(0).size() == 0);
}
}
@ -817,64 +775,64 @@ TEST_CASE("subspan")
{
span<int, 5> av = arr;
CHECK((av.subspan<2, 2>().length() == 2));
CHECK(av.subspan(2, 2).length() == 2);
CHECK(av.subspan(2, 3).length() == 3);
CHECK((av.subspan<2, 2>().size() == 2));
CHECK(av.subspan(2, 2).size() == 2);
CHECK(av.subspan(2, 3).size() == 3);
}
{
span<int, 5> av = arr;
CHECK((av.subspan<0, 0>().length() == 0));
CHECK(av.subspan(0, 0).length() == 0);
CHECK((av.subspan<0, 0>().size() == 0));
CHECK(av.subspan(0, 0).size() == 0);
}
{
span<int, 5> av = arr;
CHECK((av.subspan<0, 5>().length() == 5));
CHECK(av.subspan(0, 5).length() == 5);
CHECK_THROWS_AS(av.subspan(0, 6).length(), fail_fast);
CHECK_THROWS_AS(av.subspan(1, 5).length(), fail_fast);
CHECK((av.subspan<0, 5>().size() == 5));
CHECK(av.subspan(0, 5).size() == 5);
CHECK_THROWS_AS(av.subspan(0, 6).size(), fail_fast);
CHECK_THROWS_AS(av.subspan(1, 5).size(), fail_fast);
}
{
span<int, 5> av = arr;
CHECK((av.subspan<4, 0>().length() == 0));
CHECK(av.subspan(4, 0).length() == 0);
CHECK(av.subspan(5, 0).length() == 0);
CHECK_THROWS_AS(av.subspan(6, 0).length(), fail_fast);
CHECK((av.subspan<4, 0>().size() == 0));
CHECK(av.subspan(4, 0).size() == 0);
CHECK(av.subspan(5, 0).size() == 0);
CHECK_THROWS_AS(av.subspan(6, 0).size(), fail_fast);
}
{
span<int> av;
CHECK((av.subspan<0, 0>().length() == 0));
CHECK(av.subspan(0, 0).length() == 0);
CHECK_THROWS_AS((av.subspan<1, 0>().length()), fail_fast);
CHECK((av.subspan<0, 0>().size() == 0));
CHECK(av.subspan(0, 0).size() == 0);
CHECK_THROWS_AS((av.subspan<1, 0>().size()), fail_fast);
}
{
span<int> av;
CHECK(av.subspan(0).length() == 0);
CHECK_THROWS_AS(av.subspan(1).length(), fail_fast);
CHECK(av.subspan(0).size() == 0);
CHECK_THROWS_AS(av.subspan(1).size(), fail_fast);
}
{
span<int> av = arr;
CHECK(av.subspan(0).length() == 5);
CHECK(av.subspan(1).length() == 4);
CHECK(av.subspan(4).length() == 1);
CHECK(av.subspan(5).length() == 0);
CHECK_THROWS_AS(av.subspan(6).length(), fail_fast);
CHECK(av.subspan(0).size() == 5);
CHECK(av.subspan(1).size() == 4);
CHECK(av.subspan(4).size() == 1);
CHECK(av.subspan(5).size() == 0);
CHECK_THROWS_AS(av.subspan(6).size(), fail_fast);
const auto av2 = av.subspan(1);
for (int i = 0; i < 4; ++i) CHECK(av2[i] == i + 2);
}
{
span<int, 5> av = arr;
CHECK(av.subspan(0).length() == 5);
CHECK(av.subspan(1).length() == 4);
CHECK(av.subspan(4).length() == 1);
CHECK(av.subspan(5).length() == 0);
CHECK_THROWS_AS(av.subspan(6).length(), fail_fast);
CHECK(av.subspan(0).size() == 5);
CHECK(av.subspan(1).size() == 4);
CHECK(av.subspan(4).size() == 1);
CHECK(av.subspan(5).size() == 0);
CHECK_THROWS_AS(av.subspan(6).size(), fail_fast);
const auto av2 = av.subspan(1);
for (int i = 0; i < 4; ++i) CHECK(av2[i] == i + 2);
}
@ -1192,8 +1150,8 @@ TEST_CASE("crbegin_crend")
TEST_CASE("comparison_operators")
{
{
span<int> s1 = nullptr;
span<int> s2 = nullptr;
span<int> s1;
span<int> s2;
CHECK(s1 == s2);
CHECK(!(s1 != s2));
CHECK(!(s1 < s2));
@ -1230,7 +1188,7 @@ TEST_CASE("comparison_operators")
{
int arr[] = {2, 1}; // bigger
span<int> s1 = nullptr;
span<int> s1;
span<int> s2 = arr;
CHECK(s1 != s2);
@ -1315,17 +1273,17 @@ TEST_CASE("as_bytes")
{
const span<const int> s = a;
CHECK(s.length() == 4);
CHECK(s.size() == 4);
const span<const byte> bs = as_bytes(s);
CHECK(static_cast<const void*>(bs.data()) == static_cast<const void*>(s.data()));
CHECK(bs.length() == s.length_bytes());
CHECK(bs.size() == s.size_bytes());
}
{
span<int> s;
const auto bs = as_bytes(s);
CHECK(bs.length() == s.length());
CHECK(bs.length() == 0);
CHECK(bs.size() == s.size());
CHECK(bs.size() == 0);
CHECK(bs.size_bytes() == 0);
CHECK(static_cast<const void*>(bs.data()) == static_cast<const void*>(s.data()));
CHECK(bs.data() == nullptr);
@ -1335,7 +1293,7 @@ TEST_CASE("as_bytes")
span<int> s = a;
const auto bs = as_bytes(s);
CHECK(static_cast<const void*>(bs.data()) == static_cast<const void*>(s.data()));
CHECK(bs.length() == s.length_bytes());
CHECK(bs.size() == s.size_bytes());
}
}
@ -1347,18 +1305,18 @@ TEST_CASE("as_writeable_bytes")
#ifdef CONFIRM_COMPILATION_ERRORS
// you should not be able to get writeable bytes for const objects
span<const int> s = a;
CHECK(s.length() == 4);
CHECK(s.size() == 4);
span<const byte> bs = as_writeable_bytes(s);
CHECK(static_cast<void*>(bs.data()) == static_cast<void*>(s.data()));
CHECK(bs.length() == s.length_bytes());
CHECK(bs.size() == s.size_bytes());
#endif
}
{
span<int> s;
const auto bs = as_writeable_bytes(s);
CHECK(bs.length() == s.length());
CHECK(bs.length() == 0);
CHECK(bs.size() == s.size());
CHECK(bs.size() == 0);
CHECK(bs.size_bytes() == 0);
CHECK(static_cast<void*>(bs.data()) == static_cast<void*>(s.data()));
CHECK(bs.data() == nullptr);
@ -1368,7 +1326,7 @@ TEST_CASE("as_writeable_bytes")
span<int> s = a;
const auto bs = as_writeable_bytes(s);
CHECK(static_cast<void*>(bs.data()) == static_cast<void*>(s.data()));
CHECK(bs.length() == s.length_bytes());
CHECK(bs.size() == s.size_bytes());
}
}
@ -1378,12 +1336,12 @@ TEST_CASE("fixed_size_conversions")
// converting to an span from an equal size array is ok
span<int, 4> s4 = arr;
CHECK(s4.length() == 4);
CHECK(s4.size() == 4);
// converting to dynamic_range is always ok
{
span<int> s = s4;
CHECK(s.length() == s4.length());
CHECK(s.size() == s4.size());
static_cast<void>(s);
}

6
tests/string_span_tests.cpp
View File

@ -511,12 +511,6 @@ TEST_CASE("Constructors")
CHECK(span.length() == 0);
}
// from nullptr
{
cstring_span<> span(nullptr);
CHECK(span.length() == 0);
}
// from string literal
{
cstring_span<> span = "Hello";