diff --git a/src/cmake.cpp b/src/cmake.cpp
index 116a530..0bac4b7 100644
--- a/src/cmake.cpp
+++ b/src/cmake.cpp
@@ -5,6 +5,7 @@
 #include "filesystem.hpp"
 #include "terminal.hpp"
 #include "utility.hpp"
+#include <boost/optional.hpp>
 #include <regex>
 
 CMake::CMake(const boost::filesystem::path &path) {
@@ -141,7 +142,7 @@ boost::filesystem::path CMake::get_executable(const boost::filesystem::path &bui
     }
   }
 
-  size_t best_match_size = -1;
+  boost::optional<size_t> best_match_size;
   boost::filesystem::path best_match_executable;
 
   for(auto &cmake_executable : cmake_executables) {
@@ -154,7 +155,7 @@ boost::filesystem::path CMake::get_executable(const boost::filesystem::path &bui
         auto command_file_directory = command_file.parent_path();
         if(filesystem::file_in_path(file_path, command_file_directory)) {
           auto size = static_cast<size_t>(std::distance(command_file_directory.begin(), command_file_directory.end()));
-          if(best_match_size == static_cast<size_t>(-1) || best_match_size < size) {
+          if(best_match_size < size) {
             best_match_size = size;
             best_match_executable = maybe_executable;
           }
@@ -173,7 +174,7 @@ boost::filesystem::path CMake::get_executable(const boost::filesystem::path &bui
     auto command_file_directory = command_file.parent_path();
     if(filesystem::file_in_path(file_path, command_file_directory)) {
       auto size = static_cast<size_t>(std::distance(command_file_directory.begin(), command_file_directory.end()));
-      if(best_match_size == static_cast<size_t>(-1) || best_match_size < size) {
+      if(!best_match_size || best_match_size < size) {
         best_match_size = size;
         best_match_executable = maybe_executable;
       }
diff --git a/src/documentation.cpp b/src/documentation.cpp
index 33d4612..808e3f2 100644
--- a/src/documentation.cpp
+++ b/src/documentation.cpp
@@ -1,6 +1,10 @@
 #include "documentation.hpp"
 #include <unordered_map>
 
+// For both get_headers and get_url:
+// - Removed " (utility)" from "std::move (utility)"
+// - Removed lines with "move (algorithm)"
+
 std::vector<std::string> Documentation::CppReference::get_headers(const std::string &symbol) noexcept {
   // Extracted from http://upload.cppreference.com/mwiki/images/b/b1/cppreference-doc-20190607.zip
   // Using raw string instead of map to reduce compile time
@@ -1908,7 +1912,7 @@ std::ignore	tuple
 std::ranges::swap	concepts
 std::forward	utility
 std::exchange	utility
-std::move (utility)	utility
+std::move	utility
 std::move_if_noexcept	utility
 std::declval	utility
 std::as_const	utility
@@ -2342,7 +2346,6 @@ std::copy	algorithm
 std::copy_if	algorithm
 std::copy_n	algorithm
 std::copy_backward	algorithm
-std::move (algorithm)	algorithm
 std::move_backward	algorithm
 std::fill	algorithm
 std::fill_n	algorithm
@@ -5939,7 +5942,7 @@ std::ignore	cpp/utility/tuple/ignore
 std::ranges::swap	cpp/utility/ranges/swap
 std::forward	cpp/utility/forward
 std::exchange	cpp/utility/exchange
-std::move (utility)	cpp/utility/move
+std::move	cpp/utility/move
 std::move_if_noexcept	cpp/utility/move_if_noexcept
 std::declval	cpp/utility/declval
 std::as_const	cpp/utility/as_const
@@ -9073,7 +9076,6 @@ std::copy	cpp/algorithm/copy
 std::copy_if	cpp/algorithm/copy
 std::copy_n	cpp/algorithm/copy_n
 std::copy_backward	cpp/algorithm/copy_backward
-std::move (algorithm)	cpp/algorithm/move
 std::move_backward	cpp/algorithm/move_backward
 std::fill	cpp/algorithm/fill
 std::fill_n	cpp/algorithm/fill_n
diff --git a/src/git.cpp b/src/git.cpp
index 1c61326..7476def 100644
--- a/src/git.cpp
+++ b/src/git.cpp
@@ -252,11 +252,10 @@ std::shared_ptr<Git::Repository> Git::get_repository(const boost::filesystem::pa
   return instance;
 }
 
-boost::filesystem::path Git::path(const char *cpath, size_t cpath_length) noexcept {
+boost::filesystem::path Git::path(const char *cpath, boost::optional<size_t> cpath_length_) noexcept {
   if(cpath == nullptr)
     return boost::filesystem::path();
-  if(cpath_length == static_cast<size_t>(-1))
-    cpath_length = strlen(cpath);
+  auto cpath_length = cpath_length_.value_or(strlen(cpath));
   if(cpath_length > 0 && (cpath[cpath_length - 1] == '/' || cpath[cpath_length - 1] == '\\'))
     return std::string(cpath, cpath_length - 1);
   else
diff --git a/src/git.hpp b/src/git.hpp
index 9a67414..c03d97e 100644
--- a/src/git.hpp
+++ b/src/git.hpp
@@ -1,6 +1,7 @@
 #pragma once
 #include "mutex.hpp"
 #include <boost/filesystem.hpp>
+#include <boost/optional.hpp>
 #include <giomm.h>
 #include <git2.h>
 #include <iostream>
@@ -98,7 +99,7 @@ private:
   ///Call initialize in public static methods
   static void initialize() noexcept REQUIRES(mutex);
 
-  static boost::filesystem::path path(const char *cpath, size_t cpath_length = static_cast<size_t>(-1)) noexcept REQUIRES(mutex);
+  static boost::filesystem::path path(const char *cpath, boost::optional<size_t> cpath_length = {}) noexcept REQUIRES(mutex);
 
 public:
   static std::shared_ptr<Repository> get_repository(const boost::filesystem::path &path);
diff --git a/src/grep.cpp b/src/grep.cpp
index d636ee8..facc908 100644
--- a/src/grep.cpp
+++ b/src/grep.cpp
@@ -42,7 +42,6 @@ Grep::Grep(const boost::filesystem::path &path, const std::string &pattern, bool
   std::string command = Config::get().project.grep_command + " -R " + flags + " --color=always --binary-files=without-match " + exclude + " -n " + escaped_pattern + " *";
 
   std::stringstream stdin_stream;
-  //TODO: when debian stable gets newer g++ version that supports move on streams, remove unique_ptr below
   Terminal::get().process(stdin_stream, output, command, project_path);
 }
 
diff --git a/src/meson.cpp b/src/meson.cpp
index cffa9a2..9717efe 100644
--- a/src/meson.cpp
+++ b/src/meson.cpp
@@ -5,6 +5,7 @@
 #include "filesystem.hpp"
 #include "terminal.hpp"
 #include "utility.hpp"
+#include <boost/optional.hpp>
 #include <regex>
 
 Meson::Meson(const boost::filesystem::path &path) {
@@ -94,7 +95,7 @@ bool Meson::update_debug_build(const boost::filesystem::path &debug_build_path,
 boost::filesystem::path Meson::get_executable(const boost::filesystem::path &build_path, const boost::filesystem::path &file_path) {
   CompileCommands compile_commands(build_path);
 
-  size_t best_match_size = -1;
+  boost::optional<size_t> best_match_size;
   boost::filesystem::path best_match_executable;
   for(auto &command : compile_commands.commands) {
     auto command_file = filesystem::get_normal_path(command.file);
@@ -109,7 +110,7 @@ boost::filesystem::path Meson::get_executable(const boost::filesystem::path &bui
           auto command_file_directory = command_file.parent_path();
           if(filesystem::file_in_path(file_path, command_file_directory)) {
             auto size = static_cast<size_t>(std::distance(command_file_directory.begin(), command_file_directory.end()));
-            if(best_match_size == static_cast<size_t>(-1) || best_match_size < size) {
+            if(best_match_size < size) {
               best_match_size = size;
               best_match_executable = executable;
             }
diff --git a/src/notebook.cpp b/src/notebook.cpp
index 7f2fa63..23f2465 100644
--- a/src/notebook.cpp
+++ b/src/notebook.cpp
@@ -52,7 +52,7 @@ Notebook::Notebook() : Gtk::Paned(), notebooks(2) {
           break;
         }
       }
-      last_index = -1;
+      last_index.reset();
     });
     notebook.signal_page_added().connect([this](Gtk::Widget *widget, guint) {
       auto hbox = dynamic_cast<Gtk::Box *>(widget);
@@ -171,7 +171,7 @@ bool Notebook::open(const boost::filesystem::path &file_path_, Position position
     auto previous_view = get_current_view();
     if(previous_view) {
       view->replace_text(previous_view->get_buffer()->get_text());
-      position = get_notebook_page(get_index(previous_view)).first == 0 ? Position::right : Position::left;
+      position = get_notebook_page(previous_view).first == 0 ? Position::right : Position::left;
     }
   }
 
@@ -299,9 +299,7 @@ bool Notebook::open(const boost::filesystem::path &file_path_, Position position
 
   //Set up tab label
   tab_labels.emplace_back(new TabLabel([this, view]() {
-    auto index = get_index(view);
-    if(index != static_cast<size_t>(-1))
-      close(index);
+    close(get_index(view));
   }));
   view->update_tab_label = [this](Source::BaseView *view) {
     std::string title = view->file_path.filename().string();
@@ -311,9 +309,8 @@ bool Notebook::open(const boost::filesystem::path &file_path_, Position position
       title += ' ';
     for(size_t c = 0; c < size(); ++c) {
       if(source_views[c] == view) {
-        auto &tab_label = tab_labels.at(c);
-        tab_label->label.set_text(title);
-        tab_label->set_tooltip_text(filesystem::get_short_path(view->file_path).string());
+        tab_labels[c]->label.set_text(title);
+        tab_labels[c]->set_tooltip_text(filesystem::get_short_path(view->file_path).string());
         return;
       }
     }
@@ -446,7 +443,7 @@ bool Notebook::open(const boost::filesystem::path &file_path_, Position position
     else if(notebooks[1].get_n_pages() == 0)
       position = Position::right;
     else if(last_view)
-      position = get_notebook_page(get_index(last_view)).first == 0 ? Position::left : Position::right;
+      position = get_notebook_page(last_view).first == 0 ? Position::left : Position::right;
   }
   size_t notebook_index = position == Position::right ? 1 : 0;
   auto &notebook = notebooks[notebook_index];
@@ -458,11 +455,10 @@ bool Notebook::open(const boost::filesystem::path &file_path_, Position position
   show_all_children();
 
   notebook.set_current_page(notebook.get_n_pages() - 1);
-  last_index = -1;
+  last_index.reset();
   if(last_view) {
     auto index = get_index(last_view);
-    auto notebook_page = get_notebook_page(index);
-    if(notebook_page.first == notebook_index)
+    if(get_notebook_page(index).first == notebook_index)
       last_index = index;
   }
 
@@ -517,17 +513,17 @@ bool Notebook::close(size_t index) {
     }
     if(view == get_current_view()) {
       bool focused = false;
-      if(last_index != static_cast<size_t>(-1)) {
-        auto notebook_page = get_notebook_page(last_index);
-        if(notebook_page.first == get_notebook_page(get_index(view)).first) {
-          focus_view(source_views[last_index]);
-          notebooks[notebook_page.first].set_current_page(notebook_page.second);
-          last_index = -1;
+      if(last_index) {
+        auto last_notebook_page = get_notebook_page(*last_index);
+        if(get_notebook_page(view).first == last_notebook_page.first) {
+          focus_view(source_views[*last_index]);
+          notebooks[last_notebook_page.first].set_current_page(last_notebook_page.second);
+          last_index.reset();
           focused = true;
         }
       }
       if(!focused) {
-        auto notebook_page = get_notebook_page(get_index(view));
+        auto notebook_page = get_notebook_page(view);
         if(notebook_page.second > 0)
           focus_view(get_view(notebook_page.first, notebook_page.second - 1));
         else {
@@ -540,9 +536,9 @@ bool Notebook::close(size_t index) {
       }
     }
     else if(index == last_index)
-      last_index = -1;
-    else if(index < last_index && last_index != static_cast<size_t>(-1))
-      last_index--;
+      last_index.reset();
+    else if(index < last_index)
+      (*last_index)--;
 
     auto notebook_page = get_notebook_page(index);
     notebooks[notebook_page.first].remove_page(notebook_page.second);
@@ -600,7 +596,7 @@ bool Notebook::close_current() {
 
 void Notebook::next() {
   if(auto view = get_current_view()) {
-    auto notebook_page = get_notebook_page(get_index(view));
+    auto notebook_page = get_notebook_page(view);
     int page = notebook_page.second + 1;
     if(page >= notebooks[notebook_page.first].get_n_pages())
       notebooks[notebook_page.first].set_current_page(0);
@@ -611,7 +607,7 @@ void Notebook::next() {
 
 void Notebook::previous() {
   if(auto view = get_current_view()) {
-    auto notebook_page = get_notebook_page(get_index(view));
+    auto notebook_page = get_notebook_page(view);
     int page = notebook_page.second - 1;
     if(page < 0)
       notebooks[notebook_page.first].set_current_page(notebooks[notebook_page.first].get_n_pages() - 1);
@@ -634,8 +630,7 @@ void Notebook::toggle_split() {
   }
   else {
     for(size_t c = size() - 1; c != static_cast<size_t>(-1); --c) {
-      auto notebook_index = get_notebook_page(c).first;
-      if(notebook_index == 1 && !close(c))
+      if(get_notebook_page(c).first == 1 && !close(c))
         return;
     }
     remove(notebooks[1]);
@@ -651,10 +646,8 @@ void Notebook::toggle_tabs() {
 std::vector<std::pair<size_t, Source::View *>> Notebook::get_notebook_views() {
   std::vector<std::pair<size_t, Source::View *>> notebook_views;
   for(size_t notebook_index = 0; notebook_index < notebooks.size(); ++notebook_index) {
-    for(int page = 0; page < notebooks[notebook_index].get_n_pages(); ++page) {
-      if(auto view = get_view(notebook_index, page))
-        notebook_views.emplace_back(notebook_index, view);
-    }
+    for(int page = 0; page < notebooks[notebook_index].get_n_pages(); ++page)
+      notebook_views.emplace_back(notebook_index, get_view(notebook_index, page));
   }
   return notebook_views;
 }
@@ -680,19 +673,13 @@ void Notebook::clear_status() {
   status_state.set_text("");
 }
 
-size_t Notebook::get_index(Source::View *view) {
-  for(size_t c = 0; c < size(); ++c) {
-    if(source_views[c] == view)
-      return c;
-  }
-  return -1;
-}
-
 Source::View *Notebook::get_view(size_t notebook_index, int page) {
-  if(notebook_index == static_cast<size_t>(-1) || notebook_index >= notebooks.size() ||
-     page < 0 || page >= notebooks[notebook_index].get_n_pages())
-    return nullptr;
-  auto hbox = dynamic_cast<Gtk::Box *>(notebooks[notebook_index].get_nth_page(page));
+  if(notebook_index >= notebooks.size())
+    throw "notebook index out of bounds";
+  auto widget = notebooks[notebook_index].get_nth_page(page);
+  if(!widget)
+    throw "page number out of bounds";
+  auto hbox = dynamic_cast<Gtk::Box *>(widget);
   auto scrolled_window = dynamic_cast<Gtk::ScrolledWindow *>(hbox->get_children()[0]);
   return dynamic_cast<Source::View *>(scrolled_window->get_children()[0]);
 }
@@ -702,15 +689,30 @@ void Notebook::focus_view(Source::View *view) {
   view->grab_focus();
 }
 
+size_t Notebook::get_index(Source::View *view) {
+  for(size_t c = 0; c < size(); ++c) {
+    if(source_views[c] == view)
+      return c;
+  }
+  throw "view not found";
+}
+
 std::pair<size_t, int> Notebook::get_notebook_page(size_t index) {
-  if(index >= hboxes.size())
-    return {-1, -1};
   for(size_t c = 0; c < notebooks.size(); ++c) {
     auto page_num = notebooks[c].page_num(*hboxes[index]);
     if(page_num >= 0)
       return {c, page_num};
   }
-  return {-1, -1};
+  throw "index out of bounds";
+}
+
+std::pair<size_t, int> Notebook::get_notebook_page(Source::View *view) {
+  try {
+    return get_notebook_page(get_index(view));
+  }
+  catch(...) {
+    throw "view not found";
+  }
 }
 
 void Notebook::set_current_view(Source::View *view) {
diff --git a/src/notebook.hpp b/src/notebook.hpp
index f312e64..e563290 100644
--- a/src/notebook.hpp
+++ b/src/notebook.hpp
@@ -1,5 +1,6 @@
 #pragma once
 #include "source.hpp"
+#include <boost/optional.hpp>
 #include <gtkmm.h>
 #include <iostream>
 #include <list>
@@ -70,10 +71,15 @@ public:
   void delete_cursor_locations(Source::View *view);
 
 private:
-  size_t get_index(Source::View *view);
+  /// Throws on out of bounds arguments
   Source::View *get_view(size_t notebook_index, int page);
   void focus_view(Source::View *view);
+  /// Throws if view is not found
+  size_t get_index(Source::View *view);
+  /// Throws on out of bounds index
   std::pair<size_t, int> get_notebook_page(size_t index);
+  /// Throws if view is not found
+  std::pair<size_t, int> get_notebook_page(Source::View *view);
 
   std::vector<Gtk::Notebook> notebooks;
   std::vector<Source::View *> source_views; //Is NOT freed in destructor, this is intended for quick program exit.
@@ -83,7 +89,7 @@ private:
   std::vector<std::unique_ptr<TabLabel>> tab_labels;
 
   bool split = false;
-  size_t last_index = -1;
+  boost::optional<size_t> last_index;
 
   void set_current_view(Source::View *view);
   Source::View *current_view = nullptr;
diff --git a/src/selection_dialog.cpp b/src/selection_dialog.cpp
index e9f2cb1..ae6bd2c 100644
--- a/src/selection_dialog.cpp
+++ b/src/selection_dialog.cpp
@@ -150,7 +150,7 @@ void SelectionDialogBase::cursor_changed() {
   if(!is_visible())
     return;
   auto it = list_view_text.get_selection()->get_selected();
-  auto index = static_cast<unsigned int>(-1);
+  boost::optional<unsigned int> index;
   if(it)
     index = it->get_value(list_view_text.column_record.index);
   if(last_index == index)
@@ -159,7 +159,7 @@ void SelectionDialogBase::cursor_changed() {
     std::string text;
     if(it)
       text = it->get_value(list_view_text.column_record.text);
-    on_changed(index, text);
+    on_changed(index.value_or(-1), text);
   }
   last_index = index;
 }
@@ -208,7 +208,7 @@ void SelectionDialogBase::hide() {
   if(on_hide)
     on_hide();
   list_view_text.clear();
-  last_index = static_cast<unsigned int>(-1);
+  last_index.reset();
 }
 
 std::unique_ptr<SelectionDialog> SelectionDialog::instance;
diff --git a/src/selection_dialog.hpp b/src/selection_dialog.hpp
index 99a9893..c438bed 100644
--- a/src/selection_dialog.hpp
+++ b/src/selection_dialog.hpp
@@ -1,4 +1,5 @@
 #pragma once
+#include <boost/optional.hpp>
 #include <functional>
 #include <gtkmm.h>
 #include <unordered_map>
@@ -65,7 +66,7 @@ protected:
   SearchEntry search_entry;
   bool show_search_entry;
 
-  unsigned int last_index = static_cast<unsigned int>(-1);
+  boost::optional<unsigned int> last_index;
 };
 
 class SelectionDialog : public SelectionDialogBase {
diff --git a/src/source.cpp b/src/source.cpp
index c4ebbb1..4b3b726 100644
--- a/src/source.cpp
+++ b/src/source.cpp
@@ -235,7 +235,7 @@ Source::View::View(const boost::filesystem::path &file_path, const Glib::RefPtr<
         --line_end;
       bool lines_commented = true;
       bool extra_spaces = true;
-      int min_indentation = -1;
+      boost::optional<int> min_indentation;
       for(auto line = line_start; line <= line_end; ++line) {
         auto iter = get_buffer()->get_iter_at_line(line);
         bool line_added = false;
@@ -281,7 +281,7 @@ Source::View::View(const boost::filesystem::path &file_path, const Glib::RefPtr<
         if(line_added) {
           lines_commented &= line_commented;
           extra_spaces &= extra_space;
-          if(min_indentation == -1 || indentation < min_indentation)
+          if(!min_indentation || indentation < min_indentation)
             min_indentation = indentation;
         }
       }
@@ -290,7 +290,7 @@ Source::View::View(const boost::filesystem::path &file_path, const Glib::RefPtr<
         get_buffer()->begin_user_action();
         for(auto &line : lines) {
           auto iter = get_buffer()->get_iter_at_line(line);
-          iter.forward_chars(min_indentation);
+          iter.forward_chars(min_indentation.value_or(0));
           if(lines_commented) {
             auto end_iter = iter;
             end_iter.forward_chars(comment_characters.size() + static_cast<int>(extra_spaces));
@@ -420,7 +420,7 @@ bool Source::View::save() {
   boost::system::error_code ec;
   last_write_time = boost::filesystem::last_write_time(file_path, ec);
   if(ec)
-    last_write_time = static_cast<std::time_t>(-1);
+    last_write_time.reset();
   // Remonitor file in case it did not exist before
   monitor_file();
   get_buffer()->set_modified(false);
@@ -578,9 +578,7 @@ void Source::View::setup_signals() {
     if(on_motion_last_x != event->x || on_motion_last_y != event->y) {
       delayed_tooltips_connection.disconnect();
       if((event->state & GDK_BUTTON1_MASK) == 0) {
-        gdouble x = event->x;
-        gdouble y = event->y;
-        delayed_tooltips_connection = Glib::signal_timeout().connect([this, x, y]() {
+        delayed_tooltips_connection = Glib::signal_timeout().connect([this, x = event->x, y = event->y]() {
           type_tooltips.hide();
           diagnostic_tooltips.hide();
           Tooltips::init();
@@ -610,8 +608,8 @@ void Source::View::setup_signals() {
         }, 100);
       }
 
-      auto last_mouse_pos = std::make_pair(on_motion_last_x, on_motion_last_y);
-      auto mouse_pos = std::make_pair(event->x, event->y);
+      auto last_mouse_pos = std::make_pair<int, int>(on_motion_last_x, on_motion_last_y);
+      auto mouse_pos = std::make_pair<int, int>(event->x, event->y);
       type_tooltips.hide(last_mouse_pos, mouse_pos);
       diagnostic_tooltips.hide(last_mouse_pos, mouse_pos);
     }
@@ -1350,7 +1348,7 @@ void Source::View::extend_selection() {
     if(!select_matching_brackets) {
       bool select_end_block = language->get_id() == "cmake" || language->get_id() == "meson";
 
-      auto get_tabs = [this](Gtk::TextIter iter) {
+      auto get_tabs = [this](Gtk::TextIter iter) -> boost::optional<int> {
         iter = get_buffer()->get_iter_at_line(iter.get_line());
         int tabs = 0;
         while(!iter.ends_line() && (*iter == ' ' || *iter == '\t')) {
@@ -1359,7 +1357,7 @@ void Source::View::extend_selection() {
             break;
         }
         if(iter.ends_line())
-          return -1;
+          return {};
         return tabs;
       };
 
@@ -1380,19 +1378,18 @@ void Source::View::extend_selection() {
         end.forward_to_line_end();
 
       // Try select block that starts at cursor
-      auto end_tabs = get_tabs(end);
       auto iter = end;
-      if(end_tabs >= 0) {
+      if(auto end_tabs = get_tabs(end)) {
         bool can_select_end_block = false;
         while(iter.forward_char()) {
           auto tabs = get_tabs(iter);
-          if(tabs < 0 || tabs > end_tabs || (select_end_block && can_select_end_block && tabs == end_tabs)) {
+          if(!tabs || tabs > end_tabs || (select_end_block && can_select_end_block && tabs == end_tabs)) {
             if(!iter.ends_line())
               iter.forward_to_line_end();
             end = iter;
             if(tabs > end_tabs)
               can_select_end_block = true;
-            if(tabs == end_tabs)
+            else if(tabs == end_tabs)
               break;
             continue;
           }
@@ -3072,7 +3069,7 @@ bool Source::View::on_key_press_event_smart_inserts(GdkEventKey *key) {
       }
     }
     // Insert ''
-    else if(key->keyval == GDK_KEY_apostrophe && allow_insertion(iter) && symbol_count(iter, '\'', -1) % 2 == 0) {
+    else if(key->keyval == GDK_KEY_apostrophe && allow_insertion(iter) && symbol_count(iter, '\'') % 2 == 0) {
       get_buffer()->insert_at_cursor("''");
       auto iter = get_buffer()->get_insert()->get_iter();
       iter.backward_char();
@@ -3081,7 +3078,7 @@ bool Source::View::on_key_press_event_smart_inserts(GdkEventKey *key) {
       return true;
     }
     // Insert ""
-    else if(key->keyval == GDK_KEY_quotedbl && allow_insertion(iter) && symbol_count(iter, '"', -1) % 2 == 0) {
+    else if(key->keyval == GDK_KEY_quotedbl && allow_insertion(iter) && symbol_count(iter, '"') % 2 == 0) {
       get_buffer()->insert_at_cursor("\"\"");
       auto iter = get_buffer()->get_insert()->get_iter();
       iter.backward_char();
diff --git a/src/source.hpp b/src/source.hpp
index 59b9177..53a3eb1 100644
--- a/src/source.hpp
+++ b/src/source.hpp
@@ -134,7 +134,7 @@ namespace Source {
     Gtk::TextIter get_start_of_expression(Gtk::TextIter iter);
     bool find_close_symbol_forward(Gtk::TextIter iter, Gtk::TextIter &found_iter, unsigned int positive_char, unsigned int negative_char);
     bool find_open_symbol_backward(Gtk::TextIter iter, Gtk::TextIter &found_iter, unsigned int positive_char, unsigned int negative_char);
-    long symbol_count(Gtk::TextIter iter, unsigned int positive_char, unsigned int negative_char);
+    long symbol_count(Gtk::TextIter iter, unsigned int positive_char, unsigned int negative_char = 0);
     bool is_templated_function(Gtk::TextIter iter, Gtk::TextIter &parenthesis_end_iter);
     /// If insert is at an possible argument. Also based on last key press.
     bool is_possible_argument();
diff --git a/src/source_base.cpp b/src/source_base.cpp
index cf37573..c8853d3 100644
--- a/src/source_base.cpp
+++ b/src/source_base.cpp
@@ -129,7 +129,7 @@ Source::BaseView::BaseView(const boost::filesystem::path &file_path, const Glib:
   get_buffer()->place_cursor(get_buffer()->get_iter_at_offset(0));
 
   signal_focus_in_event().connect([this](GdkEventFocus *event) {
-    if(this->last_write_time != static_cast<std::time_t>(-1))
+    if(last_write_time)
       check_last_write_time();
     return false;
   });
@@ -202,7 +202,7 @@ bool Source::BaseView::load(bool not_undoable_action) {
   boost::system::error_code ec;
   last_write_time = boost::filesystem::last_write_time(file_path, ec);
   if(ec)
-    last_write_time = static_cast<std::time_t>(-1);
+    last_write_time.reset();
 
   disable_spellcheck = true;
   if(not_undoable_action)
@@ -312,7 +312,7 @@ void Source::BaseView::rename(const boost::filesystem::path &path) {
   boost::system::error_code ec;
   last_write_time = boost::filesystem::last_write_time(file_path, ec);
   if(ec)
-    last_write_time = static_cast<std::time_t>(-1);
+    last_write_time.reset();
   monitor_file();
 
   if(update_status_file_path)
@@ -325,7 +325,7 @@ void Source::BaseView::monitor_file() {
 #ifdef __APPLE__ // TODO: Gio file monitor is bugged on MacOS
   class Recursive {
   public:
-    static void f(BaseView *view, std::time_t previous_last_write_time = static_cast<std::time_t>(-1), bool check_called = false) {
+    static void f(BaseView *view, boost::optional<std::time_t> previous_last_write_time = {}, bool check_called = false) {
       view->delayed_monitor_changed_connection.disconnect();
       view->delayed_monitor_changed_connection = Glib::signal_timeout().connect([view, previous_last_write_time, check_called]() {
         boost::system::error_code ec;
@@ -346,10 +346,10 @@ void Source::BaseView::monitor_file() {
     }
   };
   delayed_monitor_changed_connection.disconnect();
-  if(last_write_time != static_cast<std::time_t>(-1))
+  if(last_write_time)
     Recursive::f(this);
 #else
-  if(this->last_write_time != static_cast<std::time_t>(-1)) {
+  if(last_write_time) {
     monitor = Gio::File::create_for_path(file_path.string())->monitor_file(Gio::FileMonitorFlags::FILE_MONITOR_NONE);
     monitor_changed_connection.disconnect();
     monitor_changed_connection = monitor->signal_changed().connect([this](const Glib::RefPtr<Gio::File> &file,
@@ -367,13 +367,13 @@ void Source::BaseView::monitor_file() {
 #endif
 }
 
-void Source::BaseView::check_last_write_time(std::time_t last_write_time_) {
-  if(this->last_write_time == static_cast<std::time_t>(-1))
+void Source::BaseView::check_last_write_time(boost::optional<std::time_t> last_write_time_) {
+  if(!this->last_write_time)
     return;
 
   if(Config::get().source.auto_reload_changed_files && !get_buffer()->get_modified()) {
     boost::system::error_code ec;
-    auto last_write_time = last_write_time_ != static_cast<std::time_t>(-1) ? last_write_time_ : boost::filesystem::last_write_time(file_path, ec);
+    auto last_write_time = last_write_time_.value_or(boost::filesystem::last_write_time(file_path, ec));
     if(!ec && last_write_time != this->last_write_time) {
       if(load())
         return;
@@ -381,7 +381,7 @@ void Source::BaseView::check_last_write_time(std::time_t last_write_time_) {
   }
   else if(has_focus()) {
     boost::system::error_code ec;
-    auto last_write_time = last_write_time_ != static_cast<std::time_t>(-1) ? last_write_time_ : boost::filesystem::last_write_time(file_path, ec);
+    auto last_write_time = last_write_time_.value_or(boost::filesystem::last_write_time(file_path, ec));
     if(!ec && last_write_time != this->last_write_time)
       Info::get().print("Caution: " + file_path.filename().string() + " was changed outside of juCi++");
   }
@@ -820,7 +820,7 @@ void Source::BaseView::paste() {
   size_t end_line = 0;
   bool paste_line = false;
   bool first_paste_line = true;
-  size_t paste_line_tabs = -1;
+  auto paste_line_tabs = static_cast<size_t>(-1);
   bool first_paste_line_has_tabs = false;
   for(size_t c = 0; c < text.size(); c++) {
     if(text[c] == '\n') {
@@ -1161,7 +1161,7 @@ void Source::BaseView::setup_extra_cursor_signals() {
           extra_cursor.offset = extra_cursor_iter.get_line_offset();
       }
       for(auto &extra_cursor : extra_snippet_cursors) {
-        extra_cursor.initial_forward_erase_size = std::numeric_limits<int>::max();
+        extra_cursor.initial_forward_erase_size.reset();
         auto iter = extra_cursor.mark->get_iter();
         iter.forward_chars(offset);
         get_buffer()->insert(iter, text);
@@ -1196,9 +1196,9 @@ void Source::BaseView::setup_extra_cursor_signals() {
         auto start_iter = extra_cursor.mark->get_iter();
         auto end_iter = start_iter;
         start_iter.backward_chars(*erase_backward_length);
-        if(extra_cursor.initial_forward_erase_size != std::numeric_limits<int>::max()) { // In case of different sized placeholders
-          end_iter.forward_chars(extra_cursor.initial_forward_erase_size);
-          extra_cursor.initial_forward_erase_size = std::numeric_limits<int>::max();
+        if(extra_cursor.initial_forward_erase_size) { // In case of different sized placeholders
+          end_iter.forward_chars(*extra_cursor.initial_forward_erase_size);
+          extra_cursor.initial_forward_erase_size.reset();
         }
         else
           end_iter.forward_chars(*erase_forward_length);
diff --git a/src/source_base.hpp b/src/source_base.hpp
index ed3f217..0702445 100644
--- a/src/source_base.hpp
+++ b/src/source_base.hpp
@@ -3,6 +3,7 @@
 #include "mutex.hpp"
 #include "snippets.hpp"
 #include <boost/filesystem.hpp>
+#include <boost/optional.hpp>
 #include <gtksourceviewmm.h>
 #include <list>
 #include <regex>
@@ -96,9 +97,9 @@ namespace Source {
     bool keep_clipboard = false;
 
   protected:
-    std::time_t last_write_time;
+    boost::optional<std::time_t> last_write_time;
     void monitor_file();
-    void check_last_write_time(std::time_t last_write_time_ = static_cast<std::time_t>(-1));
+    void check_last_write_time(boost::optional<std::time_t> last_write_time_ = {});
 
     bool is_bracket_language = false;
 
@@ -148,7 +149,7 @@ namespace Source {
     std::vector<ExtraCursor> extra_cursors;
     struct ExtraSnippetCursor {
       Glib::RefPtr<Gtk::TextBuffer::Mark> mark;
-      int initial_forward_erase_size;
+      boost::optional<int> initial_forward_erase_size;
     };
     bool on_key_press_event_extra_cursors(GdkEventKey *key);
 
diff --git a/src/source_language_protocol.cpp b/src/source_language_protocol.cpp
index 3e78bbe..8865546 100644
--- a/src/source_language_protocol.cpp
+++ b/src/source_language_protocol.cpp
@@ -189,9 +189,6 @@ void LanguageProtocol::Client::close(Source::LanguageProtocolView *view) {
 
 void LanguageProtocol::Client::parse_server_message() {
   if(!header_read) {
-    server_message_size = static_cast<size_t>(-1);
-    server_message_stream.seekg(0, std::ios::beg);
-
     std::string line;
     while(!header_read && std::getline(server_message_stream, line)) {
       if(!line.empty() && line != "\r") {
@@ -203,9 +200,9 @@ void LanguageProtocol::Client::parse_server_message() {
           }
         }
       }
-      else if(server_message_size != static_cast<size_t>(-1)) {
+      else if(server_message_size) {
         server_message_content_pos = server_message_stream.tellg();
-        server_message_size += server_message_content_pos;
+        *server_message_size += server_message_content_pos;
         header_read = true;
       }
     }
@@ -215,11 +212,11 @@ void LanguageProtocol::Client::parse_server_message() {
     server_message_stream.seekg(0, std::ios::end);
     size_t read_size = server_message_stream.tellg();
     std::stringstream tmp;
-    if(read_size >= server_message_size) {
-      if(read_size > server_message_size) {
-        server_message_stream.seekg(server_message_size, std::ios::beg);
-        server_message_stream.seekp(server_message_size, std::ios::beg);
-        for(size_t c = server_message_size; c < read_size; ++c) {
+    if(read_size >= *server_message_size) {
+      if(read_size > *server_message_size) {
+        server_message_stream.seekg(*server_message_size, std::ios::beg);
+        server_message_stream.seekp(*server_message_size, std::ios::beg);
+        for(size_t c = *server_message_size; c < read_size; ++c) {
           tmp.put(server_message_stream.get());
           server_message_stream.put(' ');
         }
@@ -279,13 +276,13 @@ void LanguageProtocol::Client::parse_server_message() {
       }
 
       server_message_stream = std::stringstream();
+      server_message_size.reset();
       header_read = false;
-      server_message_size = static_cast<size_t>(-1);
 
       tmp.seekg(0, std::ios::end);
       if(tmp.tellg() > 0) {
-        tmp.seekg(0, std::ios::beg);
-        server_message_stream << tmp.rdbuf();
+        server_message_stream = std::move(tmp);
+        server_message_stream.seekg(0, std::ios::beg);
         parse_server_message();
       }
     }
diff --git a/src/source_language_protocol.hpp b/src/source_language_protocol.hpp
index 0b73579..be5bd90 100644
--- a/src/source_language_protocol.hpp
+++ b/src/source_language_protocol.hpp
@@ -4,6 +4,7 @@
 #include "process.hpp"
 #include "source.hpp"
 #include <atomic>
+#include <boost/optional.hpp>
 #include <boost/property_tree/json_parser.hpp>
 #include <list>
 #include <map>
@@ -118,7 +119,7 @@ namespace LanguageProtocol {
     std::unique_ptr<TinyProcessLib::Process> process GUARDED_BY(read_write_mutex);
 
     std::stringstream server_message_stream;
-    size_t server_message_size = static_cast<size_t>(-1);
+    boost::optional<size_t> server_message_size;
     size_t server_message_content_pos;
     bool header_read = false;
 
diff --git a/src/terminal.cpp b/src/terminal.cpp
index 5273f0e..a09719a 100644
--- a/src/terminal.cpp
+++ b/src/terminal.cpp
@@ -165,7 +165,7 @@ bool Terminal::on_motion_notify_event(GdkEventMotion *event) {
   return Gtk::TextView::on_motion_notify_event(event);
 }
 
-std::tuple<size_t, size_t, std::string, std::string, std::string> Terminal::find_link(const std::string &line) {
+boost::optional<Terminal::Link> Terminal::find_link(const std::string &line) {
   const static std::regex link_regex("^([A-Z]:)?([^:]+):([0-9]+):([0-9]+): .*$|"                      // C/C++ compile warning/error/rename usages
                                      "^  --> ([A-Z]:)?([^:]+):([0-9]+):([0-9]+)$|"                    // Rust
                                      "^Assertion failed: .*file ([A-Z]:)?([^:]+), line ([0-9]+)\\.$|" // clang assert()
@@ -173,26 +173,30 @@ std::tuple<size_t, size_t, std::string, std::string, std::string> Terminal::find
                                      "^ERROR:([A-Z]:)?([^:]+):([0-9]+):.*$|"                          // g_assert (glib.h)
                                      "^([A-Z]:)?([\\/][^:]+):([0-9]+)$|"                              // Node.js
                                      "^  File \"([A-Z]:)?([^\"]+)\", line ([0-9]+), in .*$");         // Python
-  size_t start_position = -1, end_position = -1;
-  std::string path, line_number, line_offset;
   std::smatch sm;
   if(std::regex_match(line, sm, link_regex)) {
     for(size_t sub = 1; sub < link_regex.mark_count();) {
       size_t subs = sub == 1 || sub == 5 ? 4 : 3;
       if(sm.length(sub + 1)) {
-        start_position = sm.position(sub + 1) - sm.length(sub);
-        end_position = sm.position(sub + subs - 1) + sm.length(sub + subs - 1);
+        auto start_pos = static_cast<int>(sm.position(sub + 1) - sm.length(sub));
+        auto end_pos = static_cast<int>(sm.position(sub + subs - 1) + sm.length(sub + subs - 1));
+        std::string path;
         if(sm.length(sub))
-          path += sm[sub].str();
+          path = sm[sub].str();
         path += sm[sub + 1].str();
-        line_number = sm[sub + 2].str();
-        line_offset = subs == 4 ? sm[sub + 3].str() : "1";
-        break;
+        try {
+          auto line_number = std::stoi(sm[sub + 2].str());
+          auto line_offset = std::stoi(subs == 4 ? sm[sub + 3].str() : "1");
+          return Link{start_pos, end_pos, path, line_number, line_offset};
+        }
+        catch(...) {
+          return {};
+        }
       }
       sub += subs;
     }
   }
-  return std::make_tuple(start_position, end_position, path, line_number, line_offset);
+  return {};
 }
 
 void Terminal::apply_link_tags(const Gtk::TextIter &start_iter, const Gtk::TextIter &end_iter) {
@@ -224,11 +228,11 @@ void Terminal::apply_link_tags(const Gtk::TextIter &start_iter, const Gtk::TextI
           line.replace(c, 1, "a");
       }
       auto link = find_link(line.raw());
-      if(std::get<0>(link) != static_cast<size_t>(-1)) {
+      if(link) {
         auto link_start = line_start;
         auto link_end = line_start;
-        link_start.forward_chars(std::get<0>(link));
-        link_end.forward_chars(std::get<1>(link));
+        link_start.forward_chars(link->start_pos);
+        link_end.forward_chars(link->end_pos);
         get_buffer()->apply_tag(link_tag, link_start, link_end);
       }
       line_start_set = false;
@@ -356,10 +360,8 @@ bool Terminal::on_button_press_event(GdkEventButton *button_event) {
       while(!end_iter.ends_line() && end_iter.forward_char()) {
       }
       auto link = find_link(get_buffer()->get_text(start_iter, end_iter).raw());
-      if(std::get<0>(link) != static_cast<size_t>(-1)) {
-        auto path = filesystem::get_long_path(std::get<2>(link));
-        std::string line = std::get<3>(link);
-        std::string index = std::get<4>(link);
+      if(link) {
+        auto path = filesystem::get_long_path(link->path);
 
         if(path.is_relative()) {
           if(Project::current) {
@@ -379,16 +381,10 @@ bool Terminal::on_button_press_event(GdkEventButton *button_event) {
         boost::system::error_code ec;
         if(boost::filesystem::is_regular_file(path, ec)) {
           if(Notebook::get().open(path)) {
-            try {
-              int line_int = std::stoi(line) - 1;
-              int index_int = std::stoi(index) - 1;
-              auto view = Notebook::get().get_current_view();
-              view->place_cursor_at_line_index(line_int, index_int);
-              view->scroll_to_cursor_delayed(true, true);
-              return true;
-            }
-            catch(...) {
-            }
+            auto view = Notebook::get().get_current_view();
+            view->place_cursor_at_line_index(link->line - 1, link->line_index - 1);
+            view->scroll_to_cursor_delayed(true, true);
+            return true;
           }
         }
       }
diff --git a/src/terminal.hpp b/src/terminal.hpp
index 4d0ec58..e201c30 100644
--- a/src/terminal.hpp
+++ b/src/terminal.hpp
@@ -4,6 +4,7 @@
 #include "process.hpp"
 #include "source_base.hpp"
 #include <boost/filesystem.hpp>
+#include <boost/optional.hpp>
 #include <functional>
 #include <gtkmm.h>
 #include <iostream>
@@ -45,7 +46,12 @@ private:
   Glib::RefPtr<Gdk::Cursor> default_mouse_cursor;
   size_t deleted_lines = 0;
 
-  std::tuple<size_t, size_t, std::string, std::string, std::string> find_link(const std::string &line);
+  struct Link {
+    int start_pos, end_pos;
+    std::string path;
+    int line, line_index;
+  };
+  boost::optional<Link> find_link(const std::string &line);
   void apply_link_tags(const Gtk::TextIter &start_iter, const Gtk::TextIter &end_iter);
 
   Mutex processes_mutex;
diff --git a/src/tooltips.cpp b/src/tooltips.cpp
index 31434ea..21cdc75 100644
--- a/src/tooltips.cpp
+++ b/src/tooltips.cpp
@@ -287,14 +287,14 @@ void Tooltip::show(bool disregard_drawn, const std::function<void()> &on_motion)
   shown = true;
 }
 
-void Tooltip::hide(const std::pair<int, int> &last_mouse_pos, const std::pair<int, int> &mouse_pos) {
+void Tooltip::hide(const boost::optional<std::pair<int, int>> &last_mouse_pos, const boost::optional<std::pair<int, int>> &mouse_pos) {
   // Keep tooltip if mouse is moving towards it
   // Calculated using dot product between the mouse_pos vector and the corners of the tooltip window
-  if(text_view && window && shown && last_mouse_pos.first != -1 && last_mouse_pos.second != -1 && mouse_pos.first != -1 && mouse_pos.second != -1) {
+  if(text_view && window && shown && last_mouse_pos && mouse_pos) {
     static int root_x, root_y;
-    text_view->get_window(Gtk::TextWindowType::TEXT_WINDOW_TEXT)->get_root_coords(last_mouse_pos.first, last_mouse_pos.second, root_x, root_y);
-    int diff_x = mouse_pos.first - last_mouse_pos.first;
-    int diff_y = mouse_pos.second - last_mouse_pos.second;
+    text_view->get_window(Gtk::TextWindowType::TEXT_WINDOW_TEXT)->get_root_coords(last_mouse_pos->first, last_mouse_pos->second, root_x, root_y);
+    int diff_x = mouse_pos->first - last_mouse_pos->first;
+    int diff_y = mouse_pos->second - last_mouse_pos->second;
     class Corner {
     public:
       Corner(int x, int y) : x(x - root_x), y(y - root_y) {}
@@ -792,7 +792,7 @@ void Tooltips::show(const Gdk::Rectangle &rectangle, bool disregard_drawn) {
     if(rectangle.intersects(tooltip.activation_rectangle))
       tooltip.show(disregard_drawn, on_motion);
     else
-      tooltip.hide();
+      tooltip.hide({}, {});
   }
 }
 
@@ -803,7 +803,7 @@ void Tooltips::show(bool disregard_drawn) {
   }
 }
 
-void Tooltips::hide(const std::pair<int, int> &last_mouse_pos, const std::pair<int, int> &mouse_pos) {
+void Tooltips::hide(boost::optional<std::pair<int, int>> last_mouse_pos, boost::optional<std::pair<int, int>> mouse_pos) {
   for(auto &tooltip : tooltip_list)
     tooltip.hide(last_mouse_pos, mouse_pos);
 }
diff --git a/src/tooltips.hpp b/src/tooltips.hpp
index 2db8ea5..8bce712 100644
--- a/src/tooltips.hpp
+++ b/src/tooltips.hpp
@@ -1,4 +1,5 @@
 #pragma once
+#include <boost/optional.hpp>
 #include <functional>
 #include <gtkmm.h>
 #include <list>
@@ -14,7 +15,7 @@ public:
 
   void update();
   void show(bool disregard_drawn = false, const std::function<void()> &on_motion = nullptr);
-  void hide(const std::pair<int, int> &last_mouse_pos = {-1, -1}, const std::pair<int, int> &mouse_pos = {-1, -1});
+  void hide(const boost::optional<std::pair<int, int>> &last_mouse_pos, const boost::optional<std::pair<int, int>> &mouse_pos);
 
   Gdk::Rectangle activation_rectangle;
   Glib::RefPtr<Gtk::TextBuffer::Mark> start_mark;
@@ -61,7 +62,7 @@ public:
 
   void show(const Gdk::Rectangle &rectangle, bool disregard_drawn = false);
   void show(bool disregard_drawn = false);
-  void hide(const std::pair<int, int> &last_mouse_pos = {-1, -1}, const std::pair<int, int> &mouse_pos = {-1, -1});
+  void hide(boost::optional<std::pair<int, int>> last_mouse_pos = {}, boost::optional<std::pair<int, int>> mouse_pos = {});
   void clear() { tooltip_list.clear(); };
 
   template <typename... Ts>
diff --git a/tests/terminal_test.cpp b/tests/terminal_test.cpp
index 6d25e24..9a87b44 100644
--- a/tests/terminal_test.cpp
+++ b/tests/terminal_test.cpp
@@ -13,31 +13,38 @@ int main() {
 
   {
     auto link = Terminal::get().find_link("~/test/test.cc:7:41: error: expected ';' after expression.");
-    assert(std::get<0>(link) == 0);
-    assert(std::get<1>(link) == 19);
-    assert(std::get<2>(link) == "~/test/test.cc");
-    assert(std::get<3>(link) == "7");
-    assert(std::get<4>(link) == "41");
+    assert(link);
+    assert(link->start_pos == 0);
+    assert(link->end_pos == 19);
+    assert(link->path == "~/test/test.cc");
+    assert(link->line == 7);
+    assert(link->line_index == 41);
   }
   {
     auto link = Terminal::get().find_link("Assertion failed: (false), function main, file ~/test/test.cc, line 15.");
-    assert(std::get<0>(link) == 47);
-    assert(std::get<1>(link) == 70);
-    assert(std::get<2>(link) == "~/test/test.cc");
-    assert(std::get<3>(link) == "15");
+    assert(link);
+    assert(link->start_pos == 47);
+    assert(link->end_pos == 70);
+    assert(link->path == "~/test/test.cc");
+    assert(link->line == 15);
+    assert(link->line_index == 1);
   }
   {
     auto link = Terminal::get().find_link("test: ~/examples/main.cpp:17: int main(int, char**): Assertion `false' failed.");
-    assert(std::get<0>(link) == 6);
-    assert(std::get<1>(link) == 28);
-    assert(std::get<2>(link) == "~/examples/main.cpp");
-    assert(std::get<3>(link) == "17");
+    assert(link);
+    assert(link->start_pos == 6);
+    assert(link->end_pos == 28);
+    assert(link->path == "~/examples/main.cpp");
+    assert(link->line == 17);
+    assert(link->line_index == 1);
   }
   {
     auto link = Terminal::get().find_link("ERROR:~/test/test.cc:36:int main(): assertion failed: (false)");
-    assert(std::get<0>(link) == 6);
-    assert(std::get<1>(link) == 23);
-    assert(std::get<2>(link) == "~/test/test.cc");
-    assert(std::get<3>(link) == "36");
+    assert(link);
+    assert(link->start_pos == 6);
+    assert(link->end_pos == 23);
+    assert(link->path == "~/test/test.cc");
+    assert(link->line == 36);
+    assert(link->line_index == 1);
   }
 }