cli: improve command dispatch a bit

1 files changed, 42 insertions, 0 deletions

diff --git a/nihil.cli/command_node.cc b/nihil.cli/command_node.cc
new file mode 100644
index 0000000..98aeac1
--- /dev/null
+++ b/nihil.cli/command_node.cc
@@ -0,0 +1,42 @@
+/*
+ * This source code is released into the public domain.
+ */
+
+module;
+
+#include <expected>
+#include <iostream>
+#include <print>
+#include <string>
+
+module nihil.cli;
+
+import nihil.core;
+import nihil.error;
+
+namespace nihil {
+
+command_node::command_node(std::string_view path) noexcept
+	: m_path(path)
+{
+}
+
+command_node::~command_node()
+{
+}
+
+auto command_node::path(this command_node const &self) noexcept
+	-> std::string_view
+{
+	return self.m_path;
+}
+
+auto command_node::invoke(int, char **) const
+	-> std::expected<int, error>
+{
+	// If invoke() wasn't overridden, then this is an empty node,
+	// so the command was incomplete.
+	return std::unexpected(error(errc::incomplete_command));
+}
+
+} // namespace nihil