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Added function value_or()

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This commit is contained in:
Andrzej Krzemienski
2014-05-23 16:38:42 +02:00
parent 75271b73a8
commit 3984c9f9a1
7 changed files with 100 additions and 18 deletions
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43
test/optional_test_value_access.cpp
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@ -40,6 +40,20 @@ struct IntWrapper
bool operator==(IntWrapper const& rhs) const { return _i == rhs._i; }
};
template <typename T>
void test_function_value_or_for()
{
optional<T> oM0;
const optional<T> oC0;
optional<T> oM1(1);
const optional<T> oC2(2);
BOOST_CHECK(oM0.value_or(5) == 5);
BOOST_CHECK(oC0.value_or(5) == 5);
BOOST_CHECK(oM1.value_or(5) == 1);
BOOST_CHECK(oC2.value_or(5) == 2);
}
template <typename T>
void test_function_value_for()
{
@ -85,16 +99,41 @@ void test_function_value_for()
void test_function_value()
{
test_function_value_for<int>();
test_function_value_for<float>();
test_function_value_for<double>();
test_function_value_for<IntWrapper>();
}
struct FatToIntConverter
{
static int conversions;
int _val;
FatToIntConverter(int val) : _val(val) {}
operator int() { conversions += 1; return _val; }
};
int FatToIntConverter::conversions = 0;
void test_function_value_or()
{
test_function_value_or_for<int>();
test_function_value_or_for<double>();
test_function_value_or_for<IntWrapper>();
optional<int> oi(1);
BOOST_CHECK(oi.value_or(FatToIntConverter(2)) == 1);
BOOST_CHECK(FatToIntConverter::conversions == 0);
oi = boost::none;
BOOST_CHECK(oi.value_or(FatToIntConverter(2)) == 2);
BOOST_CHECK(FatToIntConverter::conversions == 1);
}
int test_main( int, char* [] )
{
try
{
test_function_value();
test_function_value_or();
}
catch ( ... )
{