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Made is_palindrome work for C++03

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This commit is contained in:
Marshall Clow
2016-08-17 13:49:16 -07:00
parent 18bcbba8f4
commit f1e9d3140c
2 changed files with 13 additions and 16 deletions
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9
include/boost/algorithm/is_palindrome.hpp
View File

@ -17,7 +17,6 @@
#include <iterator>
#include <functional>
#include <type_traits>
#include <cstring>
#include <boost/range/begin.hpp>
@ -134,10 +133,8 @@ bool is_palindrome(const R& range, Predicate p)
/// Complexity: O(N).
bool is_palindrome(const char* str)
{
if(str == nullptr)
{
if(!str)
return true;
}
return is_palindrome(str, str + strlen(str));
}
@ -154,10 +151,8 @@ bool is_palindrome(const char* str)
template<typename Predicate>
bool is_palindrome(const char* str, Predicate p)
{
if(str == nullptr)
{
if(!str)
return true;
}
return is_palindrome(str, str + strlen(str), p);
}

16
test/is_palindrome_test.cpp
View File

@ -38,6 +38,8 @@ struct functorComparator
}
};
#define Begin(arr) (arr)
#define End(arr) (arr+(sizeof(arr)/(sizeof(arr[0]))))
void test_is_palindrome()
{
@ -47,26 +49,26 @@ void test_is_palindrome()
const int oddPalindrome[] = {1,2,3,2,1};
const int evenPalindrome[] = {1,2,2,1};
int evenNonPalindrome[] = {1,4,8,8};
const char* stringNullPtr = nullptr;
const char* stringNullPtr = NULL;
// Test a default operator==
BOOST_CHECK ( ba::is_palindrome(empty));
BOOST_CHECK ( ba::is_palindrome(singleElement));
BOOST_CHECK (!ba::is_palindrome(std::begin(oddNonPalindrome), std::end(oddNonPalindrome)));
BOOST_CHECK ( ba::is_palindrome(std::begin(oddPalindrome), std::end(oddPalindrome)));
BOOST_CHECK ( ba::is_palindrome(std::begin(evenPalindrome), std::end(evenPalindrome)));
BOOST_CHECK (!ba::is_palindrome(std::begin(evenNonPalindrome), std::end(evenNonPalindrome)));
BOOST_CHECK (!ba::is_palindrome(Begin(oddNonPalindrome), End(oddNonPalindrome)));
BOOST_CHECK ( ba::is_palindrome(Begin(oddPalindrome), End(oddPalindrome)));
BOOST_CHECK ( ba::is_palindrome(Begin(evenPalindrome), End(evenPalindrome)));
BOOST_CHECK (!ba::is_palindrome(Begin(evenNonPalindrome), End(evenNonPalindrome)));
//Test the custom comparators
BOOST_CHECK ( ba::is_palindrome(empty.begin(), empty.end(), functorComparator()));
BOOST_CHECK (!ba::is_palindrome(std::begin(oddNonPalindrome), std::end(oddNonPalindrome), funcComparator<int>));
BOOST_CHECK (!ba::is_palindrome(Begin(oddNonPalindrome), End(oddNonPalindrome), funcComparator<int>));
BOOST_CHECK ( ba::is_palindrome(evenPalindrome, std::equal_to<int>()));
//Test C-strings like cases
BOOST_CHECK ( ba::is_palindrome(stringNullPtr));
BOOST_CHECK ( ba::is_palindrome(""));
BOOST_CHECK ( ba::is_palindrome("a"));
BOOST_CHECK ( ba::is_palindrome("abacaba"), std::equal_to<char>());
BOOST_CHECK ( ba::is_palindrome("abacaba", std::equal_to<char>()));
BOOST_CHECK ( ba::is_palindrome("abba"));
BOOST_CHECK (!ba::is_palindrome("acab"));
}