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Remove recursion when stringifying std::tuple

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ZXShady
2025-09-12 00:52:11 +03:00
committed by Martin Hořeňovský
parent a58df2d7c5
commit 33e6fd217a
1 changed files with 21 additions and 27 deletions
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40
src/catch2/catch_tostring.hpp
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@@ -408,43 +408,37 @@ namespace Catch {
// Separate std::tuple specialization
#if defined(CATCH_CONFIG_ENABLE_TUPLE_STRINGMAKER)
# include <tuple>
# include <utility>
namespace Catch {
namespace Detail {
template<
typename Tuple,
std::size_t N = 0,
bool = (N < std::tuple_size<Tuple>::value)
>
struct TupleElementPrinter {
static void print(const Tuple& tuple, std::ostream& os) {
os << (N ? ", " : " ")
<< ::Catch::Detail::stringify(std::get<N>(tuple));
TupleElementPrinter<Tuple, N + 1>::print(tuple, os);
}
};
template<
typename Tuple,
std::size_t N
>
struct TupleElementPrinter<Tuple, N, false> {
static void print(const Tuple&, std::ostream&) {}
};
template <typename Tuple, std::size_t... Is>
void PrintTuple( const Tuple& tuple,
std::ostream& os,
std::index_sequence<Is...> ) {
// 1 + Account for when the tuple is empty
char a[1 + sizeof...( Is )] = {
( ( os << ( Is ? ", " : " " )
<< ::Catch::Detail::stringify( std::get<Is>( tuple ) ) ),
'\0' )... };
(void)a;
}
} // namespace Detail
template <typename... Types>
struct StringMaker<std::tuple<Types...>> {
static std::string convert( const std::tuple<Types...>& tuple ) {
ReusableStringStream rss;
rss << '{';
Detail::TupleElementPrinter<std::tuple<Types...>>::print(tuple, rss.get());
Detail::PrintTuple(
tuple,
rss.get(),
std::make_index_sequence<sizeof...( Types )>{} );
rss << " }";
return rss.str();
}
};
}
} // namespace Catch
#endif // CATCH_CONFIG_ENABLE_TUPLE_STRINGMAKER
#if defined(CATCH_CONFIG_ENABLE_VARIANT_STRINGMAKER) && defined(CATCH_CONFIG_CPP17_VARIANT)