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Diffstat (limited to 'test/std/containers/views/span.comparison/op.lt.pass.cpp')
| -rw-r--r-- | test/std/containers/views/span.comparison/op.lt.pass.cpp | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/test/std/containers/views/span.comparison/op.lt.pass.cpp b/test/std/containers/views/span.comparison/op.lt.pass.cpp new file mode 100644 index 0000000000000..1a7de292e9011 --- /dev/null +++ b/test/std/containers/views/span.comparison/op.lt.pass.cpp @@ -0,0 +1,154 @@ +// -*- C++ -*- +//===------------------------------ span ---------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===---------------------------------------------------------------------===// +// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17 + +// <span> + +// template<class T, ptrdiff_t X, class U, ptrdiff_t Y> +// constexpr bool operator<(span<T, X> l, span<U, Y> r); +// +// +// Effects: Equivalent to: +// return lexicographical_compare(l.begin(), l.end(), r.begin(), r.end()); +// + +#include <span> +#include <cassert> + +#include "test_macros.h" + +struct A{}; +bool operator==(A, A) {return true;} + +constexpr int iArr1[] = { 0, 1, 2, 1, 2, 5, 6, 7, 8, 9}; + int iArr2[] = { 0, 1, 2, 1, 2, 5, 6, 7, 8, 9}; +constexpr float fArr1[] = {0., 1., 2., 1., 2., 5., 6., 7., 8., 9.}; + float fArr2[] = {0., 1., 2., 1., 2., 5., 6., 7., 8., 9.}; + + +int main () { + + constexpr std::span<const int> csp0d{}; + constexpr std::span<const int> csp1d{iArr1, 10}; + constexpr std::span<const int> csp2d{iArr1 + 3, 2}; + constexpr std::span<const int> csp3d{iArr1 + 1, 2}; + constexpr std::span<const int> csp4d{iArr1 + 6, 2}; + + constexpr std::span<const int, 0> csp0s{}; + constexpr std::span<const int, 10> csp1s{iArr1, 10}; + constexpr std::span<const int, 2> csp2s{iArr1 + 3, 2}; + constexpr std::span<const int, 2> csp3s{iArr1 + 1, 2}; + constexpr std::span<const int, 2> csp4s{iArr1 + 6, 2}; + + static_assert(!(csp0d < csp0d), ""); + static_assert(!(csp0s < csp0s), ""); + static_assert(!(csp0s < csp0d), ""); + static_assert(!(csp0d < csp0s), ""); + + static_assert( (csp0d < csp1d), ""); + static_assert( (csp0s < csp1s), ""); + static_assert( (csp0s < csp1d), ""); + static_assert( (csp0d < csp1s), ""); + + static_assert(!(csp1d < csp1s), ""); + static_assert(!(csp1s < csp1d), ""); + + static_assert(!(csp2d < csp3d), ""); + static_assert(!(csp2s < csp3s), ""); + static_assert(!(csp2d < csp3s), ""); + static_assert(!(csp2s < csp3d), ""); + + static_assert( (csp2d < csp4d), ""); + static_assert( (csp2s < csp4s), ""); + static_assert( (csp2d < csp4s), ""); + static_assert( (csp2s < csp4d), ""); + + static_assert(!(csp4d < csp2d), ""); + static_assert(!(csp4s < csp2s), ""); + static_assert(!(csp4d < csp2s), ""); + static_assert(!(csp4s < csp2d), ""); + + std::span<int> sp0d{}; + std::span<int> sp1d{iArr2, 10}; + std::span<int> sp2d{iArr2 + 3, 2}; + std::span<int> sp3d{iArr2 + 1, 2}; + std::span<int> sp4d{iArr2 + 6, 2}; + + std::span<int, 0> sp0s{}; + std::span<int, 10> sp1s{iArr2, 10}; + std::span<int, 2> sp2s{iArr2 + 3, 2}; + std::span<int, 2> sp3s{iArr2 + 1, 2}; + std::span<int, 2> sp4s{iArr2 + 6, 2}; + + assert(!(sp0d < sp0d)); + assert(!(sp0s < sp0s)); + assert(!(sp0s < sp0d)); + assert(!(sp0d < sp0s)); + + assert( (sp0d < sp1d)); + assert( (sp0s < sp1s)); + assert( (sp0s < sp1d)); + assert( (sp0d < sp1s)); + + assert(!(sp1d < sp1s)); + assert(!(sp1s < sp1d)); + + assert(!(sp2d < sp3d)); + assert(!(sp2s < sp3s)); + assert(!(sp2d < sp3s)); + assert(!(sp2s < sp3d)); + + assert( (sp2d < sp4d)); + assert( (sp2s < sp4s)); + assert( (sp2d < sp4s)); + assert( (sp2s < sp4d)); + + assert(!(sp4d < sp2d)); + assert(!(sp4s < sp2s)); + assert(!(sp4d < sp2s)); + assert(!(sp4s < sp2d)); + +// cross type comparisons + assert(!(csp0d < sp0d)); + assert(!(csp0s < sp0s)); + assert(!(csp0s < sp0d)); + assert(!(csp0d < sp0s)); + + assert( (csp0d < sp1d)); + assert( (csp0s < sp1s)); + assert( (csp0s < sp1d)); + assert( (csp0d < sp1s)); + + assert(!(csp1d < sp1s)); + assert(!(csp1s < sp1d)); + + assert(!(csp2d < sp3d)); + assert(!(csp2s < sp3s)); + assert(!(csp2d < sp3s)); + assert(!(csp2s < sp3d)); + + assert( (csp2d < sp4d)); + assert( (csp2s < sp4s)); + assert( (csp2d < sp4s)); + assert( (csp2s < sp4d)); + + assert(!(csp4d < sp2d)); + assert(!(csp4s < sp2s)); + assert(!(csp4d < sp2s)); + assert(!(csp4s < sp2d)); + +// More cross-type comparisons (int vs float) + static_assert(std::span<const float>{fArr1, 8} < std::span<const int>{iArr1, 9}, ""); + static_assert(std::span<const int>{iArr1, 8} < std::span<const float>{fArr1, 9}, ""); + assert(!(std::span<float>{fArr2} < std::span<int>{iArr2})); + assert(!(std::span<int>{iArr2} < std::span<float>{fArr2})); + + static_assert(!(std::span<const int>{iArr1, 9} < std::span<const float>{fArr1, 8}), ""); +}
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