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diff --git a/tiger-compiler/src/assert/desugar-visitor.hh b/tiger-compiler/src/assert/desugar-visitor.hh
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+++ b/tiger-compiler/src/assert/desugar-visitor.hh
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+/**
+ ** \file assert/desugar-visitor.hh
+ ** \brief Declaration of assert::DesugarVisitor.
+ */
+
+#pragma once
+
+#include <ast/assert-visitor.hh>
+#include <desugar/desugar-visitor.hh>
+
+namespace assert {
+
+  class DesugarVisitor
+    : public desugar::DesugarVisitor
+    , public ast::AssertConstVisitor
+  {
+  public:
+    using super_type = desugar::DesugarVisitor;
+    using super_type::operator();
+
+    // Build a DesugarVisitor
+    DesugarVisitor(bool desugar_for_p, bool desugar_string_cmp_p);
+
+    // Desugar assertions
+    // \param e Node to visit
+    void operator()(const ast::AssertExp& e) override;
+
+  private:
+
+    // Retrieve the pretty-printed version of an assertion's condition as a
+    // string
+    // \param e Node to pretty-print.
+    inline std::string get_formatted_assert_cond(const ast::AssertExp& e);
+
+    // Retrieve the pretty-printed version of a Location as a string
+    // \param loc Location record to pretty-print
+    inline std::string get_formatted_location(const ast::Location& loc);
+  };
+
+} // namespace assert
+
+#include <assert/desugar-visitor.hxx>