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Merge Boost.Algorithm to release branch

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[SVN r78025]
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Marshall Clow
2012-04-16 18:54:41 +00:00
parent 0f2399fef0
commit 76cd99ed53
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/*
Copyright (c) Marshall Clow 2010-2012.
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
For more information, see http://www.boost.org
*/
#include <string>
#include <iostream> // for cout, etc
#include <boost/algorithm/clamp.hpp>
namespace ba = boost::algorithm;
bool compare_string_lengths ( const std::string &one, const std::string &two )
{
return one.length () < two.length ();
}
int main ( int /*argc*/, char * /*argv*/ [] ) {
// Clamp takes a value and two "fenceposts", and brings the value "between" the fenceposts.
// If the input value is "between" the fenceposts, then it is returned unchanged.
std::cout << "Clamping 5 to between [1, 10] -> " << ba::clamp ( 5, 1, 10 ) << std::endl;
// If the input value is out side the range of the fenceposts, it "brought into" range.
std::cout << "Clamping 15 to between [1, 10] -> " << ba::clamp ( 15, 1, 10 ) << std::endl;
std::cout << "Clamping -15 to between [1, 10] -> " << ba::clamp ( -15, 1, 10 ) << std::endl;
// It doesn't just work for ints
std::cout << "Clamping 5.1 to between [1, 10] -> " << ba::clamp ( 5.1, 1.0, 10.0 ) << std::endl;
{
std::string one ( "Lower Bound" ), two ( "upper bound!" ), test1 ( "test#" ), test2 ( "#test" );
std::cout << "Clamping '" << test1 << "' between ['" << one << "' and '" << two << "'] -> '" <<
ba::clamp ( test1, one, two ) << "'" << std::endl;
std::cout << "Clamping '" << test2 << "' between ['" << one << "' and '" << two << "'] -> '" <<
ba::clamp ( test2, one, two ) << "'" << std::endl;
// There is also a predicate based version, if you want to compare objects in your own way
std::cout << "Clamping '" << test1 << "' between ['" << one << "' and '" << two << "'] (comparing lengths) -> '" <<
ba::clamp ( test1, one, two, compare_string_lengths ) << "'" << std::endl;
std::cout << "Clamping '" << test2 << "' between ['" << one << "' and '" << two << "'] (comparing lengths) -> '" <<
ba::clamp ( test2, one, two, compare_string_lengths ) << "'" << std::endl;
}
// Sometimes, though, you don't get quite what you expect
// This is because the two double arguments get converted to int
std::cout << "Somewhat unexpected: clamp ( 12, 14.7, 15.9 ) --> " << ba::clamp ( 12, 14.7, 15.9 ) << std::endl;
std::cout << "Expected: clamp ((double)12, 14.7, 15.9 ) --> " << ba::clamp ((double) 12, 14.7, 15.9 ) << std::endl;
return 0;
}