Boost C++ Application Development Cookbook - Second Edition

How to do it...

Here are different ways to do case-insensitive comparisons:

1. The most simple one is:

#include <boost/algorithm/string/predicate.hpp> const bool solution_1 = (     boost::iequals(str1, str2));

2. Using the Boost predicate and standard library method:

#include <boost/algorithm/string/compare.hpp> #include <algorithm>  const bool solution_2 = (    str1.size() == str2.size() && std::equal(        str1.begin(),        str1.end(),        str2.begin(),        boost::is_iequal()    ));

3. Making a lowercase copy of both the strings:

#include <boost/algorithm/string/case_conv.hpp>  void solution_3() {    std::string str1_low = boost::to_lower_copy(str1);    std::string str2_low = boost::to_lower_copy(str2);    assert(str1_low == str2_low);}

4. Making an uppercase copy of the original ...