ready to build AST

include/ast/astnode.h

@@ -0,0 +1,31 @@
+#ifndef ASTNODE_H
+#define ASTNODE_H
+#include <memory>
+#include <variant>
+#include <vector>
+using IdentifierType = std::string;
+struct ArrayType {
+  bool has_base_type;
+  IdentifierType basetype;
+  size_t level;
+};
+using ExprTypeInfo = std::variant<IdentifierType, ArrayType>;
+class ASTNodeVisitorBase {
+ public:
+  virtual ~ASTNodeVisitorBase() = default;
+  virtual void visit(class ASTNodeBase *context) = 0;
+};
+enum class ASTNodeType {
+
+};
+
+class ASTNodeBase {
+  ASTNodeType type;
+  // std::vector<std::shared_ptr<ASTNodeBase>> children;
+  size_t start_line, start_char_pos, end_line, end_char_pos;
+
+ public:
+  virtual ~ASTNodeBase() = default;
+  virtual void accept(class ASTNodeVisitorBase *visitor) = 0;
+};
+#endif