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diff --git a/tiger-compiler/src/ast/assign-exp.hh b/tiger-compiler/src/ast/assign-exp.hh
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+++ b/tiger-compiler/src/ast/assign-exp.hh
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+/**
+ ** \file ast/assign-exp.hh
+ ** \brief Declaration of ast::AssignExp.
+ */
+
+#pragma once
+
+#include <ast/exp.hh>
+#include <ast/var.hh>
+
+namespace ast
+{
+  /// AssignExp.
+  class AssignExp : public Exp
+  {
+  public:
+    /** \name Ctor & dtor.
+     ** \{ */
+    /// Construct an AssignExp node.
+    AssignExp(const Location& location, Var* var, Exp* exp);
+    AssignExp(const AssignExp&) = delete;
+    AssignExp& operator=(const AssignExp&) = delete;
+    /// Destroy an AssignExp node.
+    ~AssignExp() override;
+    /** \} */
+
+    /// \name Visitors entry point.
+    /// \{ */
+    /// Accept a const visitor \a v.
+    void accept(ConstVisitor& v) const override;
+    /// Accept a non-const visitor \a v.
+    void accept(Visitor& v) override;
+    /// \}
+
+    /** \name Accessors.
+     ** \{ */
+    /// Return reference to the affected variable.
+    const Var& var_get() const;
+    /// Return reference to the affected variable.
+    Var& var_get();
+    /// Return assigned value.
+    const Exp& exp_get() const;
+    /// Return assigned value.
+    Exp& exp_get();
+    /** \} */
+
+  protected:
+    /// Reference to the affected variable.
+    Var* var_;
+    /// Assigned value.
+    Exp* exp_;
+  };
+} // namespace ast
+#include <ast/assign-exp.hxx>