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diff --git a/tiger-compiler/src/ast/string-exp.hh b/tiger-compiler/src/ast/string-exp.hh
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+++ b/tiger-compiler/src/ast/string-exp.hh
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+/**
+ ** \file ast/string-exp.hh
+ ** \brief Declaration of ast::StringExp.
+ */
+
+#pragma once
+
+#include <string>
+#include <ast/exp.hh>
+
+namespace ast
+{
+  /// StringExp.
+  class StringExp : public Exp
+  {
+  public:
+    /** \name Ctor & dtor.
+     ** \{ */
+    /// Construct a StringExp node.
+    StringExp(const Location& location, const std::string& value);
+    StringExp(const StringExp&) = delete;
+    StringExp& operator=(const StringExp&) = delete;
+    /// Destroy a StringExp node.
+    /** \} */
+
+    /// \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 stored string value.
+    const std::string& value_get() const;
+    /// Return stored string value.
+    std::string& value_get();
+    /** \} */
+
+  protected:
+    /// Stored string value.
+    std::string value_;
+  };
+} // namespace ast
+#include <ast/string-exp.hxx>