mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-12-23 21:25:49 +00:00
add is_permutation algorithm: robust version (N3607)
This commit is contained in:
bolero-MURAKAMI
parent
d6aaabe45f
commit
d732a73431
3 changed files with 308 additions and 36 deletions
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@ -225,6 +225,242 @@ namespace testspr {
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TESTSPR_BOTH_ASSERT(result);
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}
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#endif
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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sprout::begin(arr1),
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sprout::end(arr1),
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sprout::begin(arr2),
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sprout::end(arr2)
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);
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TESTSPR_BOTH_ASSERT(result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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sprout::begin(arr1),
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sprout::end(arr1),
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sprout::begin(arr3),
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sprout::end(arr3)
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);
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TESTSPR_BOTH_ASSERT(!result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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sprout::begin(arr1),
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sprout::begin(arr1) + 5,
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sprout::begin(arr2),
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sprout::end(arr2) + 5
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);
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TESTSPR_BOTH_ASSERT(!result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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sprout::begin(arr1),
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sprout::begin(arr1) + 5,
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sprout::begin(arr3),
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sprout::begin(arr3) + 5
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);
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TESTSPR_BOTH_ASSERT(result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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sprout::begin(arr1),
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sprout::end(arr1),
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sprout::begin(arr2),
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sprout::end(arr2),
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testspr::equal_to<int>()
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);
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TESTSPR_BOTH_ASSERT(result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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sprout::begin(arr1),
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sprout::end(arr1),
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sprout::begin(arr3),
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sprout::end(arr3),
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testspr::equal_to<int>()
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);
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TESTSPR_BOTH_ASSERT(!result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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sprout::begin(arr1),
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sprout::begin(arr1) + 5,
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sprout::begin(arr2),
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sprout::begin(arr2) + 5,
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testspr::equal_to<int>()
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);
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TESTSPR_BOTH_ASSERT(!result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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sprout::begin(arr1),
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sprout::begin(arr1) + 5,
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sprout::begin(arr3),
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sprout::begin(arr3) + 5,
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testspr::equal_to<int>()
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);
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TESTSPR_BOTH_ASSERT(result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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testspr::reduct_forward(sprout::begin(arr1)),
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testspr::reduct_forward(sprout::end(arr1)),
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testspr::reduct_forward(sprout::begin(arr2)),
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testspr::reduct_forward(sprout::end(arr2))
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);
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TESTSPR_BOTH_ASSERT(result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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testspr::reduct_forward(sprout::begin(arr1)),
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testspr::reduct_forward(sprout::end(arr1)),
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testspr::reduct_forward(sprout::begin(arr3)),
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testspr::reduct_forward(sprout::end(arr3))
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);
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TESTSPR_BOTH_ASSERT(!result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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testspr::reduct_forward(sprout::begin(arr1)),
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testspr::reduct_forward(sprout::begin(arr1) + 5),
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testspr::reduct_forward(sprout::begin(arr2)),
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testspr::reduct_forward(sprout::begin(arr2) + 5)
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);
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TESTSPR_BOTH_ASSERT(!result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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testspr::reduct_forward(sprout::begin(arr1)),
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testspr::reduct_forward(sprout::begin(arr1) + 5),
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testspr::reduct_forward(sprout::begin(arr3)),
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testspr::reduct_forward(sprout::begin(arr3) + 5)
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);
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TESTSPR_BOTH_ASSERT(result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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testspr::reduct_forward(sprout::begin(arr1)),
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testspr::reduct_forward(sprout::end(arr1)),
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testspr::reduct_forward(sprout::begin(arr2)),
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testspr::reduct_forward(sprout::end(arr2)),
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testspr::equal_to<int>()
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);
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TESTSPR_BOTH_ASSERT(result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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testspr::reduct_forward(sprout::begin(arr1)),
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testspr::reduct_forward(sprout::end(arr1)),
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testspr::reduct_forward(sprout::begin(arr3)),
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testspr::reduct_forward(sprout::end(arr3)),
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testspr::equal_to<int>()
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);
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TESTSPR_BOTH_ASSERT(!result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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testspr::reduct_forward(sprout::begin(arr1)),
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testspr::reduct_forward(sprout::begin(arr1) + 5),
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testspr::reduct_forward(sprout::begin(arr2)),
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testspr::reduct_forward(sprout::begin(arr2) + 5),
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testspr::equal_to<int>()
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);
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TESTSPR_BOTH_ASSERT(!result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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testspr::reduct_forward(sprout::begin(arr1)),
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testspr::reduct_forward(sprout::begin(arr1) + 5),
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testspr::reduct_forward(sprout::begin(arr3)),
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testspr::reduct_forward(sprout::begin(arr3) + 5),
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testspr::equal_to<int>()
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);
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TESTSPR_BOTH_ASSERT(result);
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}
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#if defined(__clang__)
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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testspr::reduct_random_access(sprout::begin(arr1)),
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testspr::reduct_random_access(sprout::end(arr1)),
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testspr::reduct_random_access(sprout::begin(arr2)),
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testspr::reduct_random_access(sprout::end(arr2))
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);
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TESTSPR_BOTH_ASSERT(result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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testspr::reduct_random_access(sprout::begin(arr1)),
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testspr::reduct_random_access(sprout::end(arr1)),
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testspr::reduct_random_access(sprout::begin(arr3)),
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testspr::reduct_random_access(sprout::end(arr3))
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);
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TESTSPR_BOTH_ASSERT(!result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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testspr::reduct_random_access(sprout::begin(arr1)),
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testspr::reduct_random_access(sprout::begin(arr1) + 5),
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testspr::reduct_random_access(sprout::begin(arr2)),
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testspr::reduct_random_access(sprout::begin(arr2) + 5)
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);
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TESTSPR_BOTH_ASSERT(!result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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testspr::reduct_random_access(sprout::begin(arr1)),
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testspr::reduct_random_access(sprout::begin(arr1) + 5),
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testspr::reduct_random_access(sprout::begin(arr3)),
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testspr::reduct_random_access(sprout::begin(arr3) + 5)
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);
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TESTSPR_BOTH_ASSERT(result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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testspr::reduct_random_access(sprout::begin(arr1)),
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testspr::reduct_random_access(sprout::end(arr1)),
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testspr::reduct_random_access(sprout::begin(arr2)),
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testspr::reduct_random_access(sprout::end(arr2)),
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testspr::equal_to<int>()
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);
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TESTSPR_BOTH_ASSERT(result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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testspr::reduct_random_access(sprout::begin(arr1)),
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testspr::reduct_random_access(sprout::end(arr1)),
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testspr::reduct_random_access(sprout::begin(arr3)),
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testspr::reduct_random_access(sprout::end(arr3)),
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testspr::equal_to<int>()
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);
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TESTSPR_BOTH_ASSERT(!result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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testspr::reduct_random_access(sprout::begin(arr1)),
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testspr::reduct_random_access(sprout::begin(arr1) + 5),
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testspr::reduct_random_access(sprout::begin(arr2)),
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testspr::reduct_random_access(sprout::begin(arr2) + 5),
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testspr::equal_to<int>()
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);
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TESTSPR_BOTH_ASSERT(!result);
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}
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{
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_permutation(
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testspr::reduct_random_access(sprout::begin(arr1)),
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testspr::reduct_random_access(sprout::begin(arr1) + 5),
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testspr::reduct_random_access(sprout::begin(arr3)),
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testspr::reduct_random_access(sprout::begin(arr3) + 5),
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testspr::equal_to<int>()
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);
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TESTSPR_BOTH_ASSERT(result);
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}
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#endif
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}
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}
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} // namespace testspr
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@ -126,37 +126,23 @@ namespace sprout {
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template<typename RandomAccessIterator1, typename RandomAccessIterator2, typename BinaryPredicate>
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inline SPROUT_CONSTEXPR bool
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equal2_impl_ra_1(
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equal2_impl_ra(
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RandomAccessIterator1 first1, RandomAccessIterator1 last1, RandomAccessIterator2 first2, RandomAccessIterator2 last2, BinaryPredicate pred,
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typename std::iterator_traits<RandomAccessIterator1>::difference_type pivot
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)
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{
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return pivot == 0 ? pred(*first1, *first2)
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: sprout::detail::equal2_impl_ra_1(
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: sprout::detail::equal2_impl_ra(
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first1, sprout::next(first1, pivot), first2, sprout::next(first2, pivot), pred,
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pivot / 2
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)
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&& sprout::detail::equal2_impl_ra_1(
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&& sprout::detail::equal2_impl_ra(
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sprout::next(first1, pivot), last1, sprout::next(first2, pivot), last2, pred,
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(sprout::distance(first1, last1) - pivot) / 2
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)
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;
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}
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template<typename RandomAccessIterator1, typename RandomAccessIterator2, typename BinaryPredicate>
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inline SPROUT_CONSTEXPR bool
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equal2_impl_ra(
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RandomAccessIterator1 first1, RandomAccessIterator1 last1, RandomAccessIterator2 first2, RandomAccessIterator2 last2, BinaryPredicate pred,
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typename std::iterator_traits<RandomAccessIterator1>::difference_type size1, typename std::iterator_traits<RandomAccessIterator1>::difference_type size2
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)
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{
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return size1 == size2
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&& sprout::detail::equal2_impl_ra_1(
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first1, last1, first2, last2, pred,
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size1 / 2
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)
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;
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}
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template<typename RandomAccessIterator1, typename RandomAccessIterator2, typename BinaryPredicate>
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inline SPROUT_CONSTEXPR typename std::enable_if<
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sprout::is_constant_distance_iterator<RandomAccessIterator1>::value && sprout::is_constant_distance_iterator<RandomAccessIterator2>::value,
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bool
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@ -166,10 +152,12 @@ namespace sprout {
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std::random_access_iterator_tag*
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)
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{
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return sprout::detail::equal2_impl_ra(
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first1, last1, first2, last2, pred,
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sprout::distance(first1, last1), sprout::distance(first2, last2)
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);
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return sprout::distance(first1, last1) == sprout::distance(first2, last2)
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&& sprout::detail::equal2_impl_ra(
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first1, last1, first2, last2, pred,
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sprout::distance(first1, last1) / 2
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)
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;
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}
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template<typename InputIterator1, typename InputIterator2, typename BinaryPredicate>
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@ -10,7 +10,6 @@
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#include <sprout/functional/equal_to.hpp>
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#include <sprout/functional/bind2nd.hpp>
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#include <sprout/algorithm/count_if.hpp>
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#include <sprout/detail/algorithm/count_n_if.hpp>
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namespace sprout {
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namespace detail {
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@ -18,19 +17,19 @@ namespace sprout {
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inline SPROUT_CONSTEXPR bool
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is_permutation_impl_ra(
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RandomAccessIterator1 first1, RandomAccessIterator1 last1,
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RandomAccessIterator2 first2, typename std::iterator_traits<RandomAccessIterator2>::difference_type d2,
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RandomAccessIterator2 first2, RandomAccessIterator2 last2,
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BinaryPredicate pred,
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typename std::iterator_traits<RandomAccessIterator1>::difference_type pivot
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)
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{
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return pivot == 0 ? sprout::count_if(first1, last1, sprout::bind2nd(pred, *first1))
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<= sprout::detail::count_n_if(first2, d2, sprout::bind2nd(pred, *first1))
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<= sprout::count_if(first2, last2, sprout::bind2nd(pred, *first1))
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: sprout::detail::is_permutation_impl_ra(
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first1, last1, first2, d2,
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first1, last1, first2, last2,
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pred, pivot / 2
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)
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&& sprout::detail::is_permutation_impl_ra(
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sprout::next(first1, pivot), last1, first2, d2,
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sprout::next(first1, pivot), last1, first2, last2,
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pred, (sprout::distance(first1, last1) - pivot) / 2
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)
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;
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@ -47,7 +46,7 @@ namespace sprout {
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{
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return first1 == last1 ? true
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: sprout::detail::is_permutation_impl_ra(
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first1, last1, first2, sprout::distance(first1, last1),
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first1, last1, first2, sprout::next(first2, sprout::distance(first1, last1)),
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pred, sprout::distance(first1, last1) / 2
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)
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;
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@ -57,22 +56,22 @@ namespace sprout {
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inline SPROUT_CONSTEXPR sprout::pair<ForwardIterator1, bool>
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is_permutation_impl_1(
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sprout::pair<ForwardIterator1, bool> const& current,
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ForwardIterator1 last1, ForwardIterator2 first2, typename std::iterator_traits<ForwardIterator2>::difference_type d2,
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ForwardIterator1 last1, ForwardIterator2 first2, ForwardIterator2 last2,
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BinaryPredicate pred, typename std::iterator_traits<ForwardIterator1>::difference_type n
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)
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{
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typedef sprout::pair<ForwardIterator1, bool> type;
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return !current.second || current.first == last1 ? current
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: n == 1 ? sprout::count_if(current.first, last1, sprout::bind2nd(pred, *current.first))
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<= sprout::detail::count_n_if(first2, d2, sprout::bind2nd(pred, *current.first))
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<= sprout::count_if(first2, last2, sprout::bind2nd(pred, *current.first))
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? type(sprout::next(current.first), true)
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: type(current.first, false)
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: sprout::detail::is_permutation_impl_1(
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sprout::detail::is_permutation_impl_1(
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current,
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last1, first2, d2, pred, n / 2
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last1, first2, last2, pred, n / 2
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),
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last1, first2, d2, pred, n - n / 2
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last1, first2, last2, pred, n - n / 2
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)
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;
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}
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@ -80,7 +79,7 @@ namespace sprout {
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inline SPROUT_CONSTEXPR sprout::pair<ForwardIterator1, bool>
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is_permutation_impl(
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sprout::pair<ForwardIterator1, bool> const& current,
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ForwardIterator1 last1, ForwardIterator2 first2, typename std::iterator_traits<ForwardIterator2>::difference_type d2,
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ForwardIterator1 last1, ForwardIterator2 first2, ForwardIterator2 last2,
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BinaryPredicate pred, typename std::iterator_traits<ForwardIterator1>::difference_type n
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)
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{
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@ -88,9 +87,9 @@ namespace sprout {
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: sprout::detail::is_permutation_impl(
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sprout::detail::is_permutation_impl_1(
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current,
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last1, first2, d2, pred, n
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last1, first2, last2, pred, n
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),
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last1, first2, d2, pred, n * 2
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last1, first2, last2, pred, n * 2
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)
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;
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}
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@ -102,7 +101,7 @@ namespace sprout {
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)
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{
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typedef sprout::pair<ForwardIterator1, bool> type;
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return sprout::detail::is_permutation_impl(type(first1, true), last1, first2, sprout::distance(first1, last1), pred, 1).second;
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return sprout::detail::is_permutation_impl(type(first1, true), last1, first2, sprout::next(first2, sprout::distance(first1, last1)), pred, 1).second;
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}
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} // namespace detail
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@ -117,12 +116,61 @@ namespace sprout {
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typedef typename sprout::common_iterator_category<ForwardIterator1, ForwardIterator2>::type* category;
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return sprout::detail::is_permutation(first1, last1, first2, pred, category());
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}
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template<typename ForwardIterator1, typename ForwardIterator2>
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inline SPROUT_CONSTEXPR bool
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is_permutation(ForwardIterator1 first1, ForwardIterator1 last1, ForwardIterator2 first2) {
|
||||
return sprout::is_permutation(first1, last1, first2, sprout::equal_to<>());
|
||||
}
|
||||
|
||||
namespace detail {
|
||||
template<typename RandomAccessIterator1, typename RandomAccessIterator2, typename BinaryPredicate>
|
||||
inline SPROUT_CONSTEXPR typename std::enable_if<
|
||||
sprout::is_constant_distance_iterator<RandomAccessIterator1>::value && sprout::is_constant_distance_iterator<RandomAccessIterator2>::value,
|
||||
bool
|
||||
>::type
|
||||
is_permutation(
|
||||
RandomAccessIterator1 first1, RandomAccessIterator1 last1, RandomAccessIterator2 first2, RandomAccessIterator2 last2, BinaryPredicate pred,
|
||||
std::random_access_iterator_tag*
|
||||
)
|
||||
{
|
||||
return sprout::distance(first1, last1) == sprout::distance(first2, last2)
|
||||
&& sprout::detail::is_permutation_impl_ra(
|
||||
first1, last1, first2, last2,
|
||||
pred, sprout::distance(first1, last1) / 2
|
||||
)
|
||||
;
|
||||
}
|
||||
|
||||
template<typename ForwardIterator1, typename ForwardIterator2, typename BinaryPredicate>
|
||||
inline SPROUT_CONSTEXPR bool
|
||||
is_permutation(
|
||||
ForwardIterator1 first1, ForwardIterator1 last1, ForwardIterator2 first2, ForwardIterator2 last2, BinaryPredicate pred,
|
||||
std::forward_iterator_tag*
|
||||
)
|
||||
{
|
||||
typedef sprout::pair<ForwardIterator1, bool> type;
|
||||
return sprout::distance(first1, last1) == sprout::distance(first2, last2)
|
||||
&& sprout::detail::is_permutation_impl(type(first1, true), last1, first2, last2, pred, 1).second
|
||||
;
|
||||
}
|
||||
} // namespace detail
|
||||
|
||||
// 25.2.12 Is permutation
|
||||
//
|
||||
// recursion depth:
|
||||
// O(log N)
|
||||
//
|
||||
template<typename ForwardIterator1, typename ForwardIterator2, typename BinaryPredicate>
|
||||
inline SPROUT_CONSTEXPR bool
|
||||
is_permutation(ForwardIterator1 first1, ForwardIterator1 last1, ForwardIterator2 first2, ForwardIterator2 last2, BinaryPredicate pred) {
|
||||
typedef typename sprout::common_iterator_category<ForwardIterator1, ForwardIterator2>::type* category;
|
||||
return sprout::detail::is_permutation(first1, last1, first2, last2, pred, category());
|
||||
}
|
||||
template<typename ForwardIterator1, typename ForwardIterator2>
|
||||
inline SPROUT_CONSTEXPR bool
|
||||
is_permutation(ForwardIterator1 first1, ForwardIterator1 last1, ForwardIterator2 first2, ForwardIterator2 last2) {
|
||||
return sprout::is_permutation(first1, last1, first2, last2, sprout::equal_to<>());
|
||||
}
|
||||
} // namespace sprout
|
||||
|
||||
#endif // #ifndef SPROUT_ALGORITHM_IS_PERMUTATION_HPP
|
||||
|
|
|
|||
Loading…
Reference in a new issue