luau/tests/IostreamOptional.h
Arseny Kapoulkine 279855df91
Sync to upstream/release/503 (#135)
- A series of major optimizations to type checking performance on complex
programs/types (up to two orders of magnitude speedup for programs
involving huge tagged unions)
- Fix a few issues encountered by UBSAN (and maybe fix s390x builds)
- Fix gcc-11 test builds
- Fix a rare corner case where luau_load wouldn't wake inactive threads
which could result in a use-after-free due to GC
- Fix CLI crash when error object that's not a string escapes to top level
- Fix Makefile suffixes on macOS

Co-authored-by: Rodactor <rodactor@roblox.com>
2021-11-05 08:47:21 -07:00

23 lines
552 B
C++

// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
#pragma once
#include <ostream>
#include <optional>
namespace std {
inline std::ostream& operator<<(std::ostream& lhs, const std::nullopt_t&)
{
return lhs << "none";
}
template<typename T>
auto operator<<(std::ostream& lhs, const std::optional<T>& t) -> decltype(lhs << *t) // SFINAE to only instantiate << for supported types
{
if (t)
return lhs << *t;
else
return lhs << "none";
}
} // namespace std