This page will attempt to describe features of modern C++ standards (C++17, etc.) supported by the game. For information on building the game, see BuildInstructions.

Supported Compilers

0 A.D. is a cross platform game written primarily in C++ and JavaScript, and as such it has to support multiple compilers with different implemented features. Here are the currently supported compilers for the game:

• GCC 7 or newer
• Clang 6 or newer
  • Shipped with Xcode 9.3 on OS X, which is 10.13+ (which also has 10.1)
• Visual Studio 2017

In general, all features up to and including C++17 are usable, except for:

• C++17 std::filesystem is not supported on Apple Clang before the 10.15 SDK.
• C++17 std::variant is not supported on Apple Clang before the 10.13 SDK.
• C++17 std::any is not supported on Apple Clang before the 10.13 SDK.
• C++17 std::shared_mutex is not supported on MSVC when built with the v141_xp toolset.

See the following links for details: ​MSVC / ​Clang / ​GCC

Known exceptions are the above features reported by Microsoft:

#	Name	Example
P1771R1	[[nodiscard]] for constructors
P0961R1	Relaxing the structured bindings customization point finding rules
P0969R0	Allowing structured bindings to accessible members
P0588R1	Simplifying implicit lambda capture
P1825R0	Merged wording for P0527R1 and P1155R3, more implicit moves
P0929R2	Checking for abstract class types
P0962R2	Relaxing the range-for loop customization point finding rules
P0859R0	CWG 1581: When are constexpr member functions defined
P1009R2	Array size deduction in new-expressions
P1286R2	Contra CWG DR1778

There are nice features and should not be a concern in general. Note though that [[nodiscard]] cannot be used on constructors.