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diff --git a/tiger-compiler/src/overload/type-checker.hh b/tiger-compiler/src/overload/type-checker.hh
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+++ b/tiger-compiler/src/overload/type-checker.hh
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+/**
+ ** \file overload/type-checker.hh
+ ** \brief Checking/translating an OverTiger program in a Tiger program.
+ */
+
+#pragma once
+
+#include <overload/binder.hh>
+#include <type/type-checker.hh>
+#include <type/types.hh>
+
+namespace overload
+{
+  /** \brief Perform type checking, allowing function overload, and compute
+   ** the bindings of the functions.
+   **
+   ** Inheritance is declared virtual to enable diamond inheritance with
+   ** the combine::TypeChecker (src/combine/type-checker.hh), inheriting
+   ** from overload::TypeChecker and object::TypeChecker, both inheriting from
+   ** type::TypeChecker.
+   **/
+  class TypeChecker : virtual public type::TypeChecker
+  {
+  public:
+    /// Superclass.
+    using super_type = type::TypeChecker;
+    using super_type::operator();
+
+    TypeChecker(const overfun_bindings_type& overfun_bindings);
+    virtual ~TypeChecker() = default;
+
+    // FIXME: Some code was deleted here.
+  private:
+    const overfun_bindings_type& overfun_bindings_;
+  };
+
+} // namespace overload