most part of statement printers done

include/basic_printers.hpp

@@ -42,9 +42,9 @@ public:
     print_spaces(indentation);
   }
 
-  void indent() { ++current_indentation_level_; }
+  void indent() { current_indentation_level_ += tab_width_; }
 
-  void deindent() { --current_indentation_level_; }
+  void deindent() { current_indentation_level_ -= tab_width_; }
 
   void tab() { print_spaces(tab_width_); }
 
@@ -64,7 +64,15 @@ public:
     return print_words_instead_of_symbols_;
   }
 
-  size_t get_current_position() { return current_position_; }
+  size_t get_current_position() const { return current_position_; }
+
+  size_t get_current_indentation_level() const {
+    return current_indentation_level_;
+  }
+
+  size_t set_current_indentation_level(size_t indentation_level) {
+    current_indentation_level_ = indentation_level;
+  }
 
 private:
   void end_line() {

include/doc_printers.hpp

@@ -0,0 +1,10 @@
+#pragma once
+
+#include "basic_printers.hpp"
+#include "doc_nodes.hpp"
+
+namespace printers {
+
+void print_docs(const nodes::SymbolDocs &docs, Printer &printer);
+
+} // namespace printers

include/statement_nodes.hpp

@@ -72,7 +72,7 @@ public:
                      std::vector<std::optional<std::string>> &&annotations,
                      std::vector<Identifier> &&arguments,
                      std::vector<Modifier> &&reference_types,
-                     std::vector<std::optional<TypeProxy>> &&types,
+                     std::vector<TypeProxy> &&types,
                      std::vector<bool> &&optional_arguments,
                      std::vector<bool> &&result_arguments,
                      std::optional<ExpressionProxy> expression)
@@ -101,7 +101,7 @@ public:
 
   //
 
-  ModifierType get_modifier() { return modifier_; }
+  ModifierType get_modifier() const { return modifier_; }
 
   //
 
@@ -135,7 +135,7 @@ public:
 
   //
 
-  Modifier get_argument_reference_type(size_t id) {
+  Modifier get_argument_reference_type(size_t id) const {
     return reference_types_.at(id);
   }
 
@@ -143,19 +143,9 @@ public:
 
   size_t get_argument_types_size() const { return types_.size(); }
 
-  std::optional<Type *> get_argument_type(size_t id) {
-    if (types_.at(id).has_value()) {
-      return types_[id].value().get();
-    }
-    return std::nullopt;
-  }
+  Type *get_argument_type(size_t id) { return types_.at(id).get(); }
 
-  std::optional<const Type *> get_argument_type(size_t id) const {
-    if (types_.at(id).has_value()) {
-      return types_[id].value().get();
-    }
-    return std::nullopt;
-  }
+  const Type *get_argument_type(size_t id) const { return types_.at(id).get(); }
 
   //
 
@@ -191,7 +181,7 @@ private:
   std::vector<std::optional<std::string>> annotations_;
   std::vector<Identifier> arguments_;
   std::vector<Modifier> reference_types_;
-  std::vector<std::optional<TypeProxy>> types_;
+  std::vector<TypeProxy> types_;
   std::vector<bool> optional_arguments_;
   std::vector<bool> result_arguments_;
   std::optional<ExpressionProxy> expression_;
@@ -215,7 +205,7 @@ public:
 
   //
 
-  bool is_on_heap() { return is_on_heap_; }
+  bool is_on_heap() const { return is_on_heap_; }
 
   //