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Fix operator+, add tests

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This commit is contained in:
Krystian Stasiowski
2020-02-21 12:44:25 -05:00
parent 14ec006701
commit 7cf8c0aee8
2 changed files with 61 additions and 5 deletions
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18
include/boost/static_string/static_string.hpp
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@ -4456,33 +4456,41 @@ operator+(
CharT lhs,
const basic_static_string<N, CharT, Traits>& rhs)
{
return basic_static_string<N + 1, CharT, Traits>(rhs).insert(0, lhs);
// The cast to std::size_t is needed here since 0 is a null pointer constant
return basic_static_string<N + 1, CharT, Traits>(rhs).insert(
std::size_t(0), 1, lhs);
}
// Add a null-terminated character array to a string.
template<
std::size_t N, std::size_t M,
typename CharT, typename Traits>
BOOST_STATIC_STRING_CPP14_CONSTEXPR
inline
basic_static_string<N + M, CharT, Traits>
basic_static_string<(N + M) - 1, CharT, Traits>
operator+(
const basic_static_string<N, CharT, Traits>& lhs,
const CharT(&rhs)[M])
{
return basic_static_string<N + M, CharT, Traits>(lhs).append(+rhs, M);
// Subtract 1 to account for the null terminator, as "hello" is a char[6]
return basic_static_string<(N + M) - 1, CharT, Traits>(lhs).append(+rhs, M - 1);
}
// Add a string to a null-terminated character array.
template<
std::size_t N, std::size_t M,
typename CharT, typename Traits>
BOOST_STATIC_STRING_CPP14_CONSTEXPR
inline
basic_static_string<N + M, CharT, Traits>
basic_static_string<(N + M) - 1, CharT, Traits>
operator+(
const CharT(&lhs)[N],
const basic_static_string<M, CharT, Traits>& rhs)
{
return basic_static_string<N + M, CharT, Traits>(rhs).insert(0, +rhs, N);
// Subtract 1 to account for the null terminator, as "hello" is a char[6]
// The cast to std::size_t is needed here since 0 is a null pointer constant
return basic_static_string<(N + M) - 1, CharT, Traits>(rhs).insert(
std::size_t(0), +lhs, N - 1);
}
//------------------------------------------------------------------------------