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55 lines
2.6 KiB
C++
55 lines
2.6 KiB
C++
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/*
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Copyright (c) Marshall Clow 2010-2012.
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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For more information, see http://www.boost.org
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*/
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#include <string>
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#include <iostream> // for cout, etc
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#include <boost/algorithm/clamp.hpp>
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namespace ba = boost::algorithm;
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bool compare_string_lengths ( const std::string &one, const std::string &two )
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{
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return one.length () < two.length ();
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}
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int main ( int /*argc*/, char * /*argv*/ [] ) {
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// Clamp takes a value and two "fenceposts", and brings the value "between" the fenceposts.
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// If the input value is "between" the fenceposts, then it is returned unchanged.
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std::cout << "Clamping 5 to between [1, 10] -> " << ba::clamp ( 5, 1, 10 ) << std::endl;
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// If the input value is out side the range of the fenceposts, it "brought into" range.
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std::cout << "Clamping 15 to between [1, 10] -> " << ba::clamp ( 15, 1, 10 ) << std::endl;
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std::cout << "Clamping -15 to between [1, 10] -> " << ba::clamp ( -15, 1, 10 ) << std::endl;
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// It doesn't just work for ints
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std::cout << "Clamping 5.1 to between [1, 10] -> " << ba::clamp ( 5.1, 1.0, 10.0 ) << std::endl;
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{
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std::string one ( "Lower Bound" ), two ( "upper bound!" ), test1 ( "test#" ), test2 ( "#test" );
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std::cout << "Clamping '" << test1 << "' between ['" << one << "' and '" << two << "'] -> '" <<
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ba::clamp ( test1, one, two ) << "'" << std::endl;
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std::cout << "Clamping '" << test2 << "' between ['" << one << "' and '" << two << "'] -> '" <<
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ba::clamp ( test2, one, two ) << "'" << std::endl;
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// There is also a predicate based version, if you want to compare objects in your own way
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std::cout << "Clamping '" << test1 << "' between ['" << one << "' and '" << two << "'] (comparing lengths) -> '" <<
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ba::clamp ( test1, one, two, compare_string_lengths ) << "'" << std::endl;
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std::cout << "Clamping '" << test2 << "' between ['" << one << "' and '" << two << "'] (comparing lengths) -> '" <<
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ba::clamp ( test2, one, two, compare_string_lengths ) << "'" << std::endl;
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}
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// Sometimes, though, you don't get quite what you expect
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// This is because the two double arguments get converted to int
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std::cout << "Somewhat unexpected: clamp ( 12, 14.7, 15.9 ) --> " << ba::clamp ( 12, 14.7, 15.9 ) << std::endl;
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std::cout << "Expected: clamp ((double)12, 14.7, 15.9 ) --> " << ba::clamp ((double) 12, 14.7, 15.9 ) << std::endl;
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return 0;
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}
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