cli: improve command dispatch a bit

1 files changed, 28 insertions, 0 deletions

diff --git a/nihil.cli/registry.ccm b/nihil.cli/registry.ccm
new file mode 100644
index 0000000..0b9754d
--- /dev/null
+++ b/nihil.cli/registry.ccm
@@ -0,0 +1,28 @@
+/*
+ * This source code is released into the public domain.
+ */
+
+module;
+
+#include <memory>
+#include <span>
+
+export module nihil.cli:registry;
+
+namespace nihil {
+
+export struct command;
+export struct command_node;
+
+/*
+ * Register a command.  This is guaranteed not to throw; errors will print
+ * a diagnostic and exit.
+ */
+auto register_command(command *cmd) noexcept -> void;
+
+/*
+ * Get previously registered commands.
+ */
+auto get_registered_commands() -> std::span<std::shared_ptr<command_node>>;
+
+} // namespace nihil