X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;ds=sidebyside;f=cds%2Fopt%2Fcompare.h;h=23c9cbdcc3d13adb3be7651bbc94e5dd8ddae8e8;hb=176fd6666fdad6bb0a33f0d6fd2674533100ac26;hp=24e5775e67ff91701e1d006d43a1b60eecc8b3ea;hpb=c34b46ba50daf781053c4cf6e517d94188c802ed;p=libcds.git diff --git a/cds/opt/compare.h b/cds/opt/compare.h index 24e5775e..23c9cbdc 100644 --- a/cds/opt/compare.h +++ b/cds/opt/compare.h @@ -1,4 +1,32 @@ -//$$CDS-header$$ +/* + This file is a part of libcds - Concurrent Data Structures library + + (C) Copyright Maxim Khizhinsky (libcds.dev@gmail.com) 2006-2017 + + Source code repo: http://github.com/khizmax/libcds/ + Download: http://sourceforge.net/projects/libcds/files/ + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright notice, this + list of conditions and the following disclaimer. + + * Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation + and/or other materials provided with the distribution. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ #ifndef CDSLIB_OPT_COMPARE_H #define CDSLIB_OPT_COMPARE_H @@ -19,9 +47,9 @@ namespace cds { namespace opt { /** The option sets a type of a functor to compare keys. For comparing two keys \p k1 and \p k2 the functor must return: - - 1 if k1 > k2 - - 0 if k1 == k2 - - -1 if k1 < k2 + - 1 if k1 > k2 + - 0 if k1 == k2 + - -1 if k1 < k2 \p Functor is a functor with following interface: \code @@ -36,12 +64,12 @@ namespace cds { namespace opt { Note that the functor must return \p int, not a \p bool value. There are predefined type for \p Functor: - - the functor v::less_comparator that implements comparing functor through \p std::less predicate. - - the specialization of v::less_comparator functor intended for the string comparison + - the functor \p opt::v::less_comparator that implements comparing functor through \p std::less predicate. + - the specialization of \p opt::v::less_comparator functor intended for the string comparison You may implement your own comparing functor that satisfies \p Functor interface. - About relation between \ref opt::less and \ref opt::compare option setters see opt::less description. + About relation between \p %opt::less and \p %opt::compare option setters see \p opt::less description. */ template struct compare { @@ -65,7 +93,7 @@ namespace cds { namespace opt { /// Operator that compares two value of type \p T int operator()(T const& v1, T const& v2) { - if ( std::less()( v1, v2 ) ) + if ( std::less()( v1, v2 )) return -1; if ( std::less()( v2, v1 )) return 1; @@ -75,7 +103,7 @@ namespace cds { namespace opt { /// Comparator specialization for \p std::string /** - This functor uses \p std::string::compare method instead of \p std::less predicate. + This functor uses \p std::string::compare() method instead of \p std::less predicate. */ template struct less_comparator< std::basic_string > @@ -121,11 +149,11 @@ namespace cds { namespace opt { Generally, the default type for \p Functor is \p std::less but it depends on the container used. - \par Relation between \p opt::less and opt::compare option setters - Unless otherwise specified, \p compare option setter has high priority. If opt::compare and opt::less options are specified - for a container, the opt::compare option is used: + \par Relation between opt::less and opt::compare option setters + Unless otherwise specified, \p opt::compare option setter has high priority. + If \p %opt::compare and \p %opt::less options are specified for a container, the \p %opt::compare option is used: \code - // Suppose, hypothetical map_type allows to specify + // Suppose, a hypothetical map_type allows to specify // cds::opt::less and cds::opt::compare options typedef map_type< std::string, int, @@ -158,9 +186,9 @@ namespace cds { namespace opt { int operator ()( T const& t, Q const& q ) const { less_functor f; - if ( f( t, q ) ) + if ( f( t, q )) return -1; - if ( f( q, t ) ) + if ( f( q, t )) return 1; return 0; } @@ -210,7 +238,7 @@ namespace cds { namespace opt { } // namespace details //@endcond - /// [type-option] Option setter for \p equal_to predicate + /// [type-option] Option setter for \p opt::equal_to predicate /** The option sets a binary predicate that tests whether a value of a specified type is equal to another value of that type. \p Functor interface is similar to \p std::equal_to predicate interface.