initial commit

parser.h

@@ -0,0 +1,63 @@
+#pragma once
+
+#include "lexer.h"
+#include <stdexcept>
+#include <string>
+
+#include <vector>
+
+
+enum class ColumnType {
+	integer_type,
+	float_type,
+	varchar_type
+};
+
+enum class NodeType {
+	create_table,
+	select_from,
+	column_def,
+	not_implemented_yet,
+	error
+};
+
+struct Node {
+	NodeType node_type;
+
+	Node(const NodeType type) : node_type(type) {}
+};
+
+struct ColDefNode : Node {
+	std::string	name;
+	ColumnType	type;
+	int		length;
+	bool		null;
+
+	ColDefNode(const std::string col_name, const ColumnType col_type, int col_len, bool nullable) : 
+		Node(NodeType::column_def), name(col_name), type(col_type), length(col_len), null(nullable) {}
+};
+
+struct CreateTableNode : Node {
+	std::string table_name;
+	std::vector<ColDefNode> cols_defs;
+
+	CreateTableNode(const std::string name, std::vector<ColDefNode> defs) :
+		Node(NodeType::create_table), table_name(name), cols_defs(defs) {}
+};
+
+
+class Parser {
+private:
+
+public:
+	Parser();
+
+	std::unique_ptr<Node> parse(const std::string &code);
+
+private:
+    std::unique_ptr<Node> parse_create_table();
+    std::unique_ptr<Node> parse_select();
+
+private:
+	Lexer lexer;
+};