I was testing out lexical_cast, and I would expect that for any value v of type T, it should be true that

v == lexical_cast<T>(lexical_cast<string>(v))

but this does not appear to work for float or double in all cases. In particular, the following tests failed:

float value = numeric_values<float>::min(); BOOST_CHECK_EQUAL(value, lexical_cast<float>(lexical_cast<string>(value))); value = numeric_values<float>::max(); BOOST_CHECK_EQUAL(value, lexical_cast<float>(lexical_cast<string>(value)));

double dvalue = numeric_values<double>::min(); BOOST_CHECK_EQUAL(dvalue, lexical_cast<double>(lexical_cast<string>(dvalue))); dvalue = numeric_values<double>::max(); BOOST_CHECK_EQUAL(dvalue, lexical_cast<double>(lexical_cast<string>(dvalue)));

Should I have expected these tests to pass?

thanks,

--chris

Try to use BOOST_CHECK_CLOSE instead. Don't use BOOST_CHECK_EQUAL to compare floats. Gennadiy.