Basic parser

Signed-off-by: CHatingPython <chatingpython@gmail.com>

furc/include/furc/ast/program.hpp

@@ -0,0 +1,35 @@
+#ifndef FURC_AST_PROGRAM_HPP
+#define FURC_AST_PROGRAM_HPP
+
+#include "furc/ast/declaration.hpp"
+#include "furc/ast/node.hpp"
+
+#include <ostream>
+#include <vector>
+
+namespace furc {
+namespace ast {
+
+class program_node : public abstract_node<node_t::Program> {
+public:
+    program_node() {}
+public:
+    void push(node_handle<declaration_node>&& declaration) { m_declarations.push_back(std::move(declaration)); }
+
+    const std::vector<node_handle<declaration_node>>& declarations() const { return m_declarations; }
+public:
+    friend std::ostream& operator<<(std::ostream& os, const program_node& node) {
+        os << "program";
+        for (const auto& handle : node.m_declarations) {
+            os << '\n' << handle;
+        }
+        return os;
+    }
+private:
+    std::vector<node_handle<declaration_node>> m_declarations;
+};
+
+} // namespace ast
+} // namespace furc
+
+#endif // FURC_AST_PROGRAM_HPP