add: added projectsHEADmain

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diff --git a/tiger-compiler/src/ast/dumper-dot.hh b/tiger-compiler/src/ast/dumper-dot.hh
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+++ b/tiger-compiler/src/ast/dumper-dot.hh
@@ -0,0 +1,112 @@
+
+/**
+ ** \file ast/dumper-dot.hh
+ ** \brief Declaration of ast::DumperDot.
+ */
+
+#pragma once
+
+#include <ast/default-visitor.hh>
+#include <misc/concepts.hh>
+#include <misc/escape.hh>
+
+namespace ast
+{
+  /// \brief Dump an Ast into dot format.
+  class DumperDot : public ast::DefaultConstVisitor
+  {
+  public:
+    using super_type = ast::DefaultConstVisitor;
+
+    // Import overloaded virtual functions.
+    using super_type::operator();
+
+    /// Build a DumperDot.
+    DumperDot(std::ostream& ostr);
+
+    /// Destroy a DumperDot.
+    ~DumperDot() override = default;
+
+    // Visit methods.
+  public:
+    void operator()(const ast::ArrayExp&) override;
+    void operator()(const ast::ArrayTy&) override;
+    void operator()(const ast::AssignExp&) override;
+    void operator()(const ast::BreakExp&) override;
+    void operator()(const ast::CallExp&) override;
+    void operator()(const ast::CastExp&) override;
+    void operator()(const ast::ChunkList&) override;
+    void operator()(const ast::ClassTy&) override;
+    void operator()(const ast::Field&) override;
+    void operator()(const ast::FieldInit&) override;
+    void operator()(const ast::FieldVar&) override;
+    void operator()(const ast::ForExp&) override;
+    void operator()(const ast::FunctionDec&) override;
+    void operator()(const ast::IfExp&) override;
+    void operator()(const ast::IntExp&) override;
+    void operator()(const ast::LetExp&) override;
+    void operator()(const ast::MethodCallExp&) override;
+    void operator()(const ast::MethodDec&) override;
+    void operator()(const ast::NameTy&) override;
+    void operator()(const ast::NilExp&) override;
+    void operator()(const ast::ObjectExp&) override;
+    void operator()(const ast::OpExp&) override;
+    void operator()(const ast::RecordExp&) override;
+    void operator()(const ast::RecordTy&) override;
+    void operator()(const ast::SeqExp&) override;
+    void operator()(const ast::SimpleVar&) override;
+    void operator()(const ast::StringExp&) override;
+    void operator()(const ast::SubscriptVar&) override;
+    void operator()(const ast::TypeDec&) override;
+    void operator()(const ast::VarDec&) override;
+    void operator()(const ast::WhileExp&) override;
+    void operator()(const ast::FunctionChunk&) override;
+    void operator()(const ast::MethodChunk&) override;
+    void operator()(const ast::TypeChunk&) override;
+    void operator()(const ast::VarChunk&) override;
+    void operator()(const ast::AssertExp&) override;
+
+  protected:
+    void dump(const std::string& field, const ast::Ast& t);
+    void dump(const std::string& field, const ast::Ast* t);
+    template <typename Container>
+      requires misc::ConstIterable<Container>
+    void dump_list(const std::string& field, const Container& l);
+    template <typename T> void dump_def(const T& e) const;
+    void dump_type(const ast::Typable& e);
+    template <typename E> void dump_chunk(const E& e, const std::string& name);
+
+    void display_link(unsigned long old_parent_id) const;
+    void footer_and_link(unsigned long old_parent_id) const;
+
+    template <typename T>
+    unsigned long node_html_header(const T& e, const std::string& type);
+    template <typename T>
+    void node_html_field(const std::string& name,
+                         const T& content,
+                         const std::string& sep = "");
+    void node_html_one_port(const std::string& p);
+    void node_html_ports(const std::vector<std::string>& ports = {});
+    template <typename T>
+    void node_html_port_list(const std::string& name,
+                             const T& list,
+                             bool chunk = false);
+    void node_html_footer() const;
+
+  protected:
+    /// The stream to print on.
+    std::ostream& ostr_;
+
+    /// The parent id
+    unsigned long parent_id = -1;
+
+    /// Number of fields
+    unsigned long inner_fields = 0;
+
+    /// The parent field
+    const std::string* parent_field = nullptr;
+  };
+
+} // namespace ast
+
+#include <ast/dumper-dot.hxx>