219 lines
9.1 KiB
C++
219 lines
9.1 KiB
C++
// (C) Copyright Jesse Williamson 2009
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// Use, modification and distribution are subject to the
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// Boost Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#include <iostream>
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#include <vector>
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#include <boost/config.hpp>
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#include <boost/algorithm/clamp.hpp>
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#define BOOST_TEST_MAIN
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#include <boost/test/unit_test.hpp>
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namespace ba = boost::algorithm;
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bool intGreater ( int lhs, int rhs ) { return lhs > rhs; }
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bool doubleGreater ( double lhs, double rhs ) { return lhs > rhs; }
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class custom {
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public:
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custom ( int x ) : v(x) {}
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custom ( const custom &rhs ) : v(rhs.v) {}
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~custom () {}
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custom & operator = ( const custom &rhs ) { v = rhs.v; return *this; }
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bool operator < ( const custom &rhs ) const { return v < rhs.v; }
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bool operator == ( const custom &rhs ) const { return v == rhs.v; } // need this for the test
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std::ostream & print ( std::ostream &os ) const { return os << v; }
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int v;
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};
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std::ostream & operator << ( std::ostream & os, const custom &x ) { return x.print ( os ); }
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bool customLess ( const custom &lhs, const custom &rhs ) { return lhs.v < rhs.v; }
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void test_ints()
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{
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// Inside the range, equal to the endpoints, and outside the endpoints.
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BOOST_CHECK_EQUAL ( 3, ba::clamp ( 3, 1, 10 ));
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BOOST_CHECK_EQUAL ( 1, ba::clamp ( 1, 1, 10 ));
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BOOST_CHECK_EQUAL ( 1, ba::clamp ( 0, 1, 10 ));
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BOOST_CHECK_EQUAL ( 10, ba::clamp ( 10, 1, 10 ));
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BOOST_CHECK_EQUAL ( 10, ba::clamp ( 11, 1, 10 ));
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BOOST_CHECK_EQUAL ( 3, ba::clamp ( 3, 10, 1, intGreater ));
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BOOST_CHECK_EQUAL ( 1, ba::clamp ( 1, 10, 1, intGreater ));
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BOOST_CHECK_EQUAL ( 1, ba::clamp ( 0, 10, 1, intGreater ));
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BOOST_CHECK_EQUAL ( 10, ba::clamp ( 10, 10, 1, intGreater ));
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BOOST_CHECK_EQUAL ( 10, ba::clamp ( 11, 10, 1, intGreater ));
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// Negative numbers
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BOOST_CHECK_EQUAL ( -3, ba::clamp ( -3, -10, -1 ));
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BOOST_CHECK_EQUAL ( -1, ba::clamp ( -1, -10, -1 ));
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BOOST_CHECK_EQUAL ( -1, ba::clamp ( 0, -10, -1 ));
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BOOST_CHECK_EQUAL ( -10, ba::clamp ( -10, -10, -1 ));
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BOOST_CHECK_EQUAL ( -10, ba::clamp ( -11, -10, -1 ));
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// Mixed positive and negative numbers
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BOOST_CHECK_EQUAL ( 5, ba::clamp ( 5, -10, 10 ));
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BOOST_CHECK_EQUAL ( -10, ba::clamp ( -10, -10, 10 ));
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BOOST_CHECK_EQUAL ( -10, ba::clamp ( -15, -10, 10 ));
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BOOST_CHECK_EQUAL ( 10, ba::clamp ( 10, -10, 10 ));
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BOOST_CHECK_EQUAL ( 10, ba::clamp ( 15, -10, 10 ));
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// Unsigned
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BOOST_CHECK_EQUAL ( 5U, ba::clamp ( 5U, 1U, 10U ));
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BOOST_CHECK_EQUAL ( 1U, ba::clamp ( 1U, 1U, 10U ));
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BOOST_CHECK_EQUAL ( 1U, ba::clamp ( 0U, 1U, 10U ));
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BOOST_CHECK_EQUAL ( 10U, ba::clamp ( 10U, 1U, 10U ));
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BOOST_CHECK_EQUAL ( 10U, ba::clamp ( 15U, 1U, 10U ));
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// Mixed (1)
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BOOST_CHECK_EQUAL ( 5U, ba::clamp ( 5U, 1, 10 ));
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BOOST_CHECK_EQUAL ( 1U, ba::clamp ( 1U, 1, 10 ));
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BOOST_CHECK_EQUAL ( 1U, ba::clamp ( 0U, 1, 10 ));
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BOOST_CHECK_EQUAL ( 10U, ba::clamp ( 10U, 1, 10 ));
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BOOST_CHECK_EQUAL ( 10U, ba::clamp ( 15U, 1, 10 ));
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// Mixed (3)
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BOOST_CHECK_EQUAL ( 5U, ba::clamp ( 5U, 1, 10. ));
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BOOST_CHECK_EQUAL ( 1U, ba::clamp ( 1U, 1, 10. ));
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BOOST_CHECK_EQUAL ( 1U, ba::clamp ( 0U, 1, 10. ));
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BOOST_CHECK_EQUAL ( 10U, ba::clamp ( 10U, 1, 10. ));
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BOOST_CHECK_EQUAL ( 10U, ba::clamp ( 15U, 1, 10. ));
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short foo = 50;
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BOOST_CHECK_EQUAL ( 56, ba::clamp ( foo, 56.9, 129 ));
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BOOST_CHECK_EQUAL ( 24910, ba::clamp ( foo, 12345678, 123456999 ));
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}
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void test_floats()
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{
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// Inside the range, equal to the endpoints, and outside the endpoints.
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BOOST_CHECK_EQUAL ( 3.0, ba::clamp ( 3.0, 1.0, 10.0 ));
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BOOST_CHECK_EQUAL ( 1.0, ba::clamp ( 1.0, 1.0, 10.0 ));
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BOOST_CHECK_EQUAL ( 1.0, ba::clamp ( 0.0, 1.0, 10.0 ));
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BOOST_CHECK_EQUAL ( 10.0, ba::clamp ( 10.0, 1.0, 10.0 ));
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BOOST_CHECK_EQUAL ( 10.0, ba::clamp ( 11.0, 1.0, 10.0 ));
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BOOST_CHECK_EQUAL ( 3.0, ba::clamp ( 3.0, 10.0, 1.0, doubleGreater ));
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BOOST_CHECK_EQUAL ( 1.0, ba::clamp ( 1.0, 10.0, 1.0, doubleGreater ));
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BOOST_CHECK_EQUAL ( 1.0, ba::clamp ( 0.0, 10.0, 1.0, doubleGreater ));
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BOOST_CHECK_EQUAL ( 10.0, ba::clamp ( 10.0, 10.0, 1.0, doubleGreater ));
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BOOST_CHECK_EQUAL ( 10.0, ba::clamp ( 11.0, 10.0, 1.0, doubleGreater ));
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// Negative numbers
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BOOST_CHECK_EQUAL ( -3.f, ba::clamp ( -3.f, -10.f, -1.f ));
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BOOST_CHECK_EQUAL ( -1.f, ba::clamp ( -1.f, -10.f, -1.f ));
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BOOST_CHECK_EQUAL ( -1.f, ba::clamp ( 0.f, -10.f, -1.f ));
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BOOST_CHECK_EQUAL ( -10.f, ba::clamp ( -10.f, -10.f, -1.f ));
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BOOST_CHECK_EQUAL ( -10.f, ba::clamp ( -11.f, -10.f, -1.f ));
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// Mixed positive and negative numbers
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BOOST_CHECK_EQUAL ( 5.f, ba::clamp ( 5.f, -10.f, 10.f ));
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BOOST_CHECK_EQUAL ( -10.f, ba::clamp ( -10.f, -10.f, 10.f ));
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BOOST_CHECK_EQUAL ( -10.f, ba::clamp ( -15.f, -10.f, 10.f ));
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BOOST_CHECK_EQUAL ( 10.f, ba::clamp ( 10.f, -10.f, 10.f ));
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BOOST_CHECK_EQUAL ( 10.f, ba::clamp ( 15.f, -10.f, 10.f ));
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// Mixed (1)
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BOOST_CHECK_EQUAL ( 5.f, ba::clamp ( 5.f, -10., 10. ));
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BOOST_CHECK_EQUAL ( -10.f, ba::clamp ( -10.f, -10., 10. ));
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BOOST_CHECK_EQUAL ( -10.f, ba::clamp ( -15.f, -10., 10. ));
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BOOST_CHECK_EQUAL ( 10.f, ba::clamp ( 10.f, -10., 10. ));
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BOOST_CHECK_EQUAL ( 10.f, ba::clamp ( 15.f, -10., 10. ));
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// Mixed (2)
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BOOST_CHECK_EQUAL ( 5.f, ba::clamp ( 5.f, -10, 10 ));
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BOOST_CHECK_EQUAL ( -10.f, ba::clamp ( -10.f, -10, 10 ));
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BOOST_CHECK_EQUAL ( -10.f, ba::clamp ( -15.f, -10, 10 ));
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BOOST_CHECK_EQUAL ( 10.f, ba::clamp ( 10.f, -10, 10 ));
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BOOST_CHECK_EQUAL ( 10.f, ba::clamp ( 15.f, -10, 10 ));
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}
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void test_custom()
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{
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// Inside the range, equal to the endpoints, and outside the endpoints.
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BOOST_CHECK_EQUAL ( custom( 3), ba::clamp ( custom( 3), custom(1), custom(10)));
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BOOST_CHECK_EQUAL ( custom( 1), ba::clamp ( custom( 1), custom(1), custom(10)));
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BOOST_CHECK_EQUAL ( custom( 1), ba::clamp ( custom( 0), custom(1), custom(10)));
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BOOST_CHECK_EQUAL ( custom(10), ba::clamp ( custom(10), custom(1), custom(10)));
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BOOST_CHECK_EQUAL ( custom(10), ba::clamp ( custom(11), custom(1), custom(10)));
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BOOST_CHECK_EQUAL ( custom( 3), ba::clamp ( custom( 3), custom(1), custom(10), customLess ));
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BOOST_CHECK_EQUAL ( custom( 1), ba::clamp ( custom( 1), custom(1), custom(10), customLess ));
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BOOST_CHECK_EQUAL ( custom( 1), ba::clamp ( custom( 0), custom(1), custom(10), customLess ));
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BOOST_CHECK_EQUAL ( custom(10), ba::clamp ( custom(10), custom(1), custom(10), customLess ));
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BOOST_CHECK_EQUAL ( custom(10), ba::clamp ( custom(11), custom(1), custom(10), customLess ));
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// Fail!!
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// BOOST_CHECK_EQUAL ( custom(1), ba::clamp ( custom(11), custom(1), custom(10)));
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}
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#define elementsof(v) (sizeof (v) / sizeof (v[0]))
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#define a_begin(v) (&v[0])
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#define a_end(v) (v + elementsof (v))
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#define a_range(v) v
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#define b_e(v) a_begin(v),a_end(v)
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void test_int_range ()
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{
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int inputs [] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 19, 99, 999, -1, -3, -99, 234234 };
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int outputs [] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, -1, -1, -1, 10 };
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std::vector<int> results;
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std::vector<int> in_v;
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std::copy ( a_begin(inputs), a_end(inputs), std::back_inserter ( in_v ));
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ba::clamp_range ( a_begin(inputs), a_end(inputs), std::back_inserter ( results ), -1, 10 );
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BOOST_CHECK ( std::equal ( results.begin(), results.end (), outputs ));
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results.clear ();
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ba::clamp_range ( in_v.begin (), in_v.end (), std::back_inserter ( results ), -1, 10 );
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BOOST_CHECK ( std::equal ( results.begin(), results.end (), outputs ));
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results.clear ();
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ba::clamp_range ( a_begin(inputs), a_end(inputs), std::back_inserter ( results ), 10, -1, intGreater );
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BOOST_CHECK ( std::equal ( results.begin(), results.end (), outputs ));
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results.clear ();
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ba::clamp_range ( in_v.begin (), in_v.end (), std::back_inserter ( results ), 10, -1, intGreater );
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BOOST_CHECK ( std::equal ( results.begin(), results.end (), outputs ));
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results.clear ();
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ba::clamp_range ( a_range(inputs), std::back_inserter ( results ), -1, 10 );
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BOOST_CHECK ( std::equal ( results.begin(), results.end (), outputs ));
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results.clear ();
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ba::clamp_range ( in_v, std::back_inserter ( results ), -1, 10 );
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BOOST_CHECK ( std::equal ( results.begin(), results.end (), outputs ));
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results.clear ();
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ba::clamp_range ( a_range(inputs), std::back_inserter ( results ), 10, -1, intGreater );
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BOOST_CHECK ( std::equal ( results.begin(), results.end (), outputs ));
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results.clear ();
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ba::clamp_range ( in_v, std::back_inserter ( results ), 10, -1, intGreater );
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BOOST_CHECK ( std::equal ( results.begin(), results.end (), outputs ));
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results.clear ();
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int junk[elementsof(inputs)];
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ba::clamp_range ( inputs, junk, 10, -1, intGreater );
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BOOST_CHECK ( std::equal ( b_e(junk), outputs ));
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}
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BOOST_AUTO_TEST_CASE( test_main )
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{
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test_ints ();
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test_floats ();
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test_custom ();
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test_int_range ();
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// test_float_range ();
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// test_custom_range ();
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}
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