7 files changed, 82 insertions, 0 deletions
diff --git a/include/cru/parse/Nonterminal.hpp b/include/cru/parse/Nonterminal.hpp
index e69de29b..1bc6f9ff 100644
--- a/include/cru/parse/Nonterminal.hpp
+++ b/include/cru/parse/Nonterminal.hpp
@@ -0,0 +1,14 @@
+#pragma once
+#include "Symbol.hpp"
+
+namespace cru::parse {
+class Nonterminal : public Symbol {
+ public:
+  Nonterminal(Grammar* grammar, String name);
+
+  CRU_DELETE_COPY(Nonterminal)
+  CRU_DELETE_MOVE(Nonterminal)
+
+  ~Nonterminal() override;
+};
+}  // namespace cru::parse
diff --git a/include/cru/parse/Symbol.hpp b/include/cru/parse/Symbol.hpp
index e69de29b..5c862c25 100644
--- a/include/cru/parse/Symbol.hpp
+++ b/include/cru/parse/Symbol.hpp
@@ -0,0 +1,28 @@
+#pragma once
+#include "cru/common/String.hpp"
+
+namespace cru::parse {
+class Grammar;
+
+// Base class of Terminal and Nonterminal.
+class Symbol : public Object {
+ public:
+  Symbol(Grammar* grammar, String name);
+
+  CRU_DELETE_COPY(Symbol)
+  CRU_DELETE_MOVE(Symbol)
+
+  ~Symbol() override;
+
+ public:
+  Grammar* GetGrammar() { return grammar_; }
+
+  String GetName() const { return name_; }
+  void SetName(String name) { name_ = std::move(name); }
+
+ private:
+  Grammar* grammar_;
+
+  String name_;
+};
+}  // namespace cru::parse
diff --git a/include/cru/parse/Terminal.hpp b/include/cru/parse/Terminal.hpp
index e69de29b..b42ba1f9 100644
--- a/include/cru/parse/Terminal.hpp
+++ b/include/cru/parse/Terminal.hpp
@@ -0,0 +1,14 @@
+#pragma once
+#include "Symbol.hpp"
+
+namespace cru::parse {
+class Terminal : public Symbol {
+ public:
+  explicit Terminal(Grammar* grammar, String name);
+
+  CRU_DELETE_COPY(Terminal)
+  CRU_DELETE_MOVE(Terminal)
+
+  ~Terminal() override;
+};
+}  // namespace cru::parse
diff --git a/src/parse/Nonterminal.cpp b/src/parse/Nonterminal.cpp
index e69de29b..4d60d3d3 100644
--- a/src/parse/Nonterminal.cpp
+++ b/src/parse/Nonterminal.cpp
@@ -0,0 +1,8 @@
+#include "cru/parse/Nonterminal.hpp"
+
+namespace cru::parse {
+Nonterminal::Nonterminal(Grammar* grammar, String name)
+    : Symbol(grammar, std::move(name)) {}
+
+Nonterminal::~Nonterminal() {}
+}  // namespace cru::parse
diff --git a/src/parse/Symbol.cpp b/src/parse/Symbol.cpp
index e69de29b..bcedc490 100644
--- a/src/parse/Symbol.cpp
+++ b/src/parse/Symbol.cpp
@@ -0,0 +1,8 @@
+#include "cru/parse/Symbol.hpp"
+
+namespace cru::parse {
+Symbol::Symbol(Grammar* grammar, String name)
+    : grammar_(grammar), name_(std::move(name)) {}
+
+Symbol::~Symbol() {}
+}  // namespace cru::parse
diff --git a/src/parse/Terminal.cpp b/src/parse/Terminal.cpp
index e69de29b..acd9576e 100644
--- a/src/parse/Terminal.cpp
+++ b/src/parse/Terminal.cpp
@@ -0,0 +1,7 @@
+#include "cru/parse/Terminal.hpp"
+
+namespace cru::parse {
+Terminal::Terminal(Grammar* grammar, String name) : Symbol(grammar, name) {}
+
+Terminal::~Terminal() {}
+}  // namespace cru::parse
diff --git a/src/parse/TokenType.cpp b/src/parse/TokenType.cpp
index 2819a4de..9b06d56f 100644
--- a/src/parse/TokenType.cpp
+++ b/src/parse/TokenType.cpp
@@ -2,4 +2,7 @@
 
 namespace cru::parse {
 TokenType::TokenType(String name) : name_(std::move(name)) {}
+
+TokenType::~TokenType() {}
+
 }  // namespace cru::parse