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https://github.com/boostorg/hana.git
synced 2026-02-14 12:52:10 +00:00
Huge reorganization and refactoring.
- Split type class instances into separate files - Instances provided automatically by a type class are actually MCDs - Test each instance in a single file, not one file per method - Refactor the operator system to fix the ADL-related bug.
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@@ -5,9 +5,11 @@ Distributed under the Boost Software License, Version 1.0.
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*/
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#include <boost/hana/ext/std/integer_sequence.hpp>
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#include <boost/hana/ext/std/integral_constant.hpp>
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#include <boost/hana/detail/assert.hpp>
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#include <test/laws/iterable.hpp>
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#include <utility>
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using namespace boost::hana;
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@@ -15,21 +17,47 @@ using namespace boost::hana;
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int main() {
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// head
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{
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BOOST_HANA_CONSTEXPR_ASSERT(head(std::index_sequence<0>{}) == 0);
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BOOST_HANA_CONSTEXPR_ASSERT(head(std::index_sequence<0, 1>{}) == 0);
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BOOST_HANA_CONSTANT_ASSERT(equal(
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head(std::index_sequence<0>{}),
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std::integral_constant<int, 0>{}
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));
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BOOST_HANA_CONSTANT_ASSERT(equal(
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head(std::index_sequence<0, 1>{}),
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std::integral_constant<int, 0>{}
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));
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}
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// is_empty
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{
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BOOST_HANA_CONSTANT_ASSERT(is_empty(std::index_sequence<>{}));
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BOOST_HANA_CONSTANT_ASSERT(!is_empty(std::index_sequence<0>{}));
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BOOST_HANA_CONSTANT_ASSERT(!is_empty(std::index_sequence<1>{}));
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BOOST_HANA_CONSTANT_ASSERT(not_(is_empty(std::index_sequence<0>{})));
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BOOST_HANA_CONSTANT_ASSERT(not_(is_empty(std::index_sequence<1>{})));
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}
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// tail
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{
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BOOST_HANA_CONSTANT_ASSERT(equal(tail(std::index_sequence<0>{}), std::index_sequence<>{}));
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BOOST_HANA_CONSTANT_ASSERT(equal(tail(std::index_sequence<0, 1>{}), std::index_sequence<1>{}));
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BOOST_HANA_CONSTANT_ASSERT(equal(tail(std::index_sequence<0, 1, 2>{}), std::index_sequence<1, 2>{}));
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BOOST_HANA_CONSTANT_ASSERT(equal(
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tail(std::index_sequence<0>{}),
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std::index_sequence<>{}
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));
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BOOST_HANA_CONSTANT_ASSERT(equal(
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tail(std::index_sequence<0, 1>{}),
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std::index_sequence<1>{}
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));
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BOOST_HANA_CONSTANT_ASSERT(equal(
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tail(std::index_sequence<0, 1, 2>{}),
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std::index_sequence<1, 2>{}
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));
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}
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// laws
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{
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BOOST_HANA_CONSTANT_ASSERT(Iterable_laws(
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std::index_sequence<>{},
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std::index_sequence<0>{},
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std::index_sequence<0, 1>{},
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std::index_sequence<0, 1, 2>{},
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std::index_sequence<0, 1, 2, 3>{}
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));
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}
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}
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