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// This source code is released into the public domain.
export module nihil.cli:registry;
import nihil.std;
namespace nihil {
export struct command;
///////////////////////////////////////////////////////////////////////
// Command registry storage. This is where command::command() registers
// itself when the global command objects are constructed at startup.
//
// Because we sometimes create stub commands dynamically, the registry
// storage is a list of shared_ptr<command>. The "real" commands (which
// refer to global objects) will be created with a null deleter so they
// are never deleted. This allows real and stub commands to mix in the
// same command_tree.
// Get the current registry.
auto get_registry() -> std::vector<std::shared_ptr<command>> &
{
static auto commands = std::vector<std::shared_ptr<command>>();
return commands;
}
// Register a new command.
auto register_command(command *cmd) noexcept -> void
{
auto constexpr null_deleter = [] (command const *) -> void {};
get_registry().emplace_back(cmd, null_deleter);
}
} // namespace nihil
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