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author George L. Albany <Megacake1234@gmail.com>2023-11-10 23:39:21 +0100
committer GitHub <noreply@github.com>2023-11-10 23:39:21 +0100
commit0008bd6bf3d00cc284199be668c0b03d9f2c5d77 (patch)
tree65ca78284e4ed1a2b07716018a721aaaf68d3830 /extension
parentf8da0860795d273452501fa4d7fbfcc40073a884 (diff)
parentcf591eddfa59839c2620ebf119727f069b965dfe (diff)
Merge pull request #163 from Spartan322/improve-binding
Diffstat (limited to 'extension')
-rw-r--r--extension/src/openvic-extension/Checksum.cpp34
-rw-r--r--extension/src/openvic-extension/Checksum.hpp27
-rw-r--r--extension/src/openvic-extension/GameSingleton.cpp147
-rw-r--r--extension/src/openvic-extension/GameSingleton.hpp2
-rw-r--r--extension/src/openvic-extension/MapMesh.cpp22
-rw-r--r--extension/src/openvic-extension/utility/ClassBindings.hpp90
-rw-r--r--extension/src/openvic-extension/utility/StringLiteral.hpp106
7 files changed, 316 insertions, 112 deletions
diff --git a/extension/src/openvic-extension/Checksum.cpp b/extension/src/openvic-extension/Checksum.cpp
new file mode 100644
index 0000000..6da5afe
--- /dev/null
+++ b/extension/src/openvic-extension/Checksum.cpp
@@ -0,0 +1,34 @@
+#include "Checksum.hpp"
+
+#include <godot_cpp/core/error_macros.hpp>
+#include <godot_cpp/variant/string.hpp>
+
+#include "openvic-extension/utility/ClassBindings.hpp"
+
+using namespace OpenVic;
+using namespace godot;
+
+void Checksum::_bind_methods() {
+ OV_BIND_METHOD(Checksum::get_checksum_text);
+}
+
+Checksum* Checksum::get_singleton() {
+ return _checksum;
+}
+
+Checksum::Checksum() {
+ ERR_FAIL_COND(_checksum != nullptr);
+ _checksum = this;
+}
+
+Checksum::~Checksum() {
+ ERR_FAIL_COND(_checksum != this);
+ _checksum = nullptr;
+}
+
+/* REQUIREMENTS:
+ * DAT-8
+ */
+godot::String Checksum::get_checksum_text() {
+ return godot::String("1234abcd");
+}
diff --git a/extension/src/openvic-extension/Checksum.hpp b/extension/src/openvic-extension/Checksum.hpp
index c5d8daf..2b2f959 100644
--- a/extension/src/openvic-extension/Checksum.hpp
+++ b/extension/src/openvic-extension/Checksum.hpp
@@ -1,6 +1,8 @@
#pragma once
#include <godot_cpp/core/class_db.hpp>
+#include <godot_cpp/core/object.hpp>
+#include <godot_cpp/variant/string.hpp>
namespace OpenVic {
class Checksum : public godot::Object {
@@ -10,30 +12,15 @@ namespace OpenVic {
static inline Checksum* _checksum = nullptr;
protected:
- static void _bind_methods() {
- godot::ClassDB::bind_method(godot::D_METHOD("get_checksum_text"), &Checksum::get_checksum_text);
- }
+ static void _bind_methods();
public:
- static inline Checksum* get_singleton() {
- return _checksum;
- }
+ static Checksum* get_singleton();
- inline Checksum() {
- ERR_FAIL_COND(_checksum != nullptr);
- _checksum = this;
- }
- inline ~Checksum() {
- ERR_FAIL_COND(_checksum != this);
- _checksum = nullptr;
- }
+ Checksum();
+ ~Checksum();
// END BOILERPLATE
- /* REQUIREMENTS:
- * DAT-8
- */
- inline godot::String get_checksum_text() {
- return godot::String("1234abcd");
- }
+ godot::String get_checksum_text();
};
}
diff --git a/extension/src/openvic-extension/GameSingleton.cpp b/extension/src/openvic-extension/GameSingleton.cpp
index 311b602..9dae7f2 100644
--- a/extension/src/openvic-extension/GameSingleton.cpp
+++ b/extension/src/openvic-extension/GameSingleton.cpp
@@ -1,11 +1,14 @@
#include "GameSingleton.hpp"
+#include <godot_cpp/core/class_db.hpp>
+#include <godot_cpp/core/error_macros.hpp>
#include <godot_cpp/variant/utility_functions.hpp>
#include <openvic-simulation/utility/Logger.hpp>
#include "openvic-extension/LoadLocalisation.hpp"
#include "openvic-extension/Utilities.hpp"
+#include "openvic-extension/utility/ClassBindings.hpp"
using namespace godot;
using namespace OpenVic;
@@ -14,94 +17,76 @@ using OpenVic::Utilities::godot_to_std_string;
using OpenVic::Utilities::std_to_godot_string;
using OpenVic::Utilities::std_view_to_godot_string;
-GameSingleton* GameSingleton::singleton = nullptr;
-
-#define BM ClassDB::bind_method
-#define BSM ClassDB::bind_static_method
-
void GameSingleton::_bind_methods() {
- BSM("GameSingleton", D_METHOD("setup_logger"), &GameSingleton::setup_logger);
- BM(D_METHOD("load_defines_compatibility_mode", "file_paths"), &GameSingleton::load_defines_compatibility_mode);
- BSM(
- "GameSingleton", D_METHOD("search_for_game_path", "hint_path"), &GameSingleton::search_for_game_path, DEFVAL(String {})
- );
- BM(D_METHOD("lookup_file", "path"), &GameSingleton::lookup_file);
- BM(D_METHOD("setup_game"), &GameSingleton::setup_game);
-
- BM(D_METHOD("get_province_index_from_uv_coords", "coords"), &GameSingleton::get_province_index_from_uv_coords);
- BM(D_METHOD("get_province_info_from_index", "index"), &GameSingleton::get_province_info_from_index);
- BM(D_METHOD("get_width"), &GameSingleton::get_width);
- BM(D_METHOD("get_height"), &GameSingleton::get_height);
- BM(D_METHOD("get_aspect_ratio"), &GameSingleton::get_aspect_ratio);
- BM(D_METHOD("get_terrain_texture"), &GameSingleton::get_terrain_texture);
- BM(D_METHOD("get_province_shape_image_subdivisions"), &GameSingleton::get_province_shape_image_subdivisions);
- BM(D_METHOD("get_province_shape_texture"), &GameSingleton::get_province_shape_texture);
- BM(D_METHOD("get_province_colour_texture"), &GameSingleton::get_province_colour_texture);
-
- BM(D_METHOD("get_mapmode_count"), &GameSingleton::get_mapmode_count);
- BM(D_METHOD("get_mapmode_identifier", "index"), &GameSingleton::get_mapmode_identifier);
- BM(D_METHOD("set_mapmode", "identifier"), &GameSingleton::set_mapmode);
- BM(D_METHOD("get_selected_province_index"), &GameSingleton::get_selected_province_index);
- BM(D_METHOD("set_selected_province", "index"), &GameSingleton::set_selected_province);
-
- BM(D_METHOD("expand_building", "province_index", "building_type_identifier"), &GameSingleton::expand_building);
-
- BM(D_METHOD("set_paused", "paused"), &GameSingleton::set_paused);
- BM(D_METHOD("toggle_paused"), &GameSingleton::toggle_paused);
- BM(D_METHOD("is_paused"), &GameSingleton::is_paused);
- BM(D_METHOD("increase_speed"), &GameSingleton::increase_speed);
- BM(D_METHOD("decrease_speed"), &GameSingleton::decrease_speed);
- BM(D_METHOD("can_increase_speed"), &GameSingleton::can_increase_speed);
- BM(D_METHOD("can_decrease_speed"), &GameSingleton::can_decrease_speed);
- BM(D_METHOD("get_longform_date"), &GameSingleton::get_longform_date);
- BM(D_METHOD("try_tick"), &GameSingleton::try_tick);
+ OV_BIND_SMETHOD(setup_logger);
+
+ OV_BIND_METHOD(GameSingleton::load_defines_compatibility_mode, { "file_paths" });
+ OV_BIND_SMETHOD(search_for_game_path, { "hint_path" }, DEFVAL(String {}));
+
+ OV_BIND_METHOD(GameSingleton::lookup_file, { "path" });
+ OV_BIND_METHOD(GameSingleton::setup_game);
+
+ OV_BIND_METHOD(GameSingleton::get_province_index_from_uv_coords, { "coords" });
+ OV_BIND_METHOD(GameSingleton::get_province_info_from_index, { "index" });
+
+ OV_BIND_METHOD(GameSingleton::get_width);
+ OV_BIND_METHOD(GameSingleton::get_height);
+ OV_BIND_METHOD(GameSingleton::get_aspect_ratio);
+ OV_BIND_METHOD(GameSingleton::get_terrain_texture);
+ OV_BIND_METHOD(GameSingleton::get_province_shape_image_subdivisions);
+ OV_BIND_METHOD(GameSingleton::get_province_shape_texture);
+ OV_BIND_METHOD(GameSingleton::get_province_colour_texture);
+
+ OV_BIND_METHOD(GameSingleton::get_mapmode_count);
+ OV_BIND_METHOD(GameSingleton::get_mapmode_identifier);
+ OV_BIND_METHOD(GameSingleton::set_mapmode, { "identifier" });
+ OV_BIND_METHOD(GameSingleton::get_selected_province_index);
+ OV_BIND_METHOD(GameSingleton::set_selected_province, { "index" });
+
+ OV_BIND_METHOD(GameSingleton::expand_building, { "province_index", "building_type_identifier" });
+
+ OV_BIND_METHOD(GameSingleton::set_paused, { "paused" });
+ OV_BIND_METHOD(GameSingleton::toggle_paused);
+ OV_BIND_METHOD(GameSingleton::is_paused);
+ OV_BIND_METHOD(GameSingleton::increase_speed);
+ OV_BIND_METHOD(GameSingleton::decrease_speed);
+ OV_BIND_METHOD(GameSingleton::can_increase_speed);
+ OV_BIND_METHOD(GameSingleton::can_decrease_speed);
+ OV_BIND_METHOD(GameSingleton::get_longform_date);
+ OV_BIND_METHOD(GameSingleton::try_tick);
ADD_SIGNAL(MethodInfo("state_updated"));
ADD_SIGNAL(MethodInfo("province_selected", PropertyInfo(Variant::INT, "index")));
- BSM("GameSingleton", D_METHOD("get_province_info_province_key"), &GameSingleton::get_province_info_province_key);
- BSM("GameSingleton", D_METHOD("get_province_info_region_key"), &GameSingleton::get_province_info_region_key);
- BSM("GameSingleton", D_METHOD("get_province_info_life_rating_key"), &GameSingleton::get_province_info_life_rating_key);
- BSM("GameSingleton", D_METHOD("get_province_info_terrain_type_key"), &GameSingleton::get_province_info_terrain_type_key);
- BSM(
- "GameSingleton", D_METHOD("get_province_info_total_population_key"),
- &GameSingleton::get_province_info_total_population_key
- );
- BSM("GameSingleton", D_METHOD("get_province_info_pop_types_key"), &GameSingleton::get_province_info_pop_types_key);
- BSM(
- "GameSingleton", D_METHOD("get_province_info_pop_ideologies_key"),
- &GameSingleton::get_province_info_pop_ideologies_key
- );
- BSM("GameSingleton", D_METHOD("get_province_info_pop_cultures_key"), &GameSingleton::get_province_info_pop_cultures_key);
- BSM("GameSingleton", D_METHOD("get_province_info_rgo_key"), &GameSingleton::get_province_info_rgo_key);
- BSM("GameSingleton", D_METHOD("get_province_info_buildings_key"), &GameSingleton::get_province_info_buildings_key);
-
- BSM("GameSingleton", D_METHOD("get_building_info_building_key"), &GameSingleton::get_building_info_building_key);
- BSM("GameSingleton", D_METHOD("get_building_info_level_key"), &GameSingleton::get_building_info_level_key);
- BSM(
- "GameSingleton", D_METHOD("get_building_info_expansion_state_key"),
- &GameSingleton::get_building_info_expansion_state_key
- );
- BSM("GameSingleton", D_METHOD("get_building_info_start_date_key"), &GameSingleton::get_building_info_start_date_key);
- BSM("GameSingleton", D_METHOD("get_building_info_end_date_key"), &GameSingleton::get_building_info_end_date_key);
- BSM(
- "GameSingleton", D_METHOD("get_building_info_expansion_progress_key"),
- &GameSingleton::get_building_info_expansion_progress_key
+ OV_BIND_SMETHOD(get_province_info_province_key);
+ OV_BIND_SMETHOD(get_province_info_region_key);
+ OV_BIND_SMETHOD(get_province_info_life_rating_key);
+ OV_BIND_SMETHOD(get_province_info_terrain_type_key);
+ OV_BIND_SMETHOD(get_province_info_total_population_key);
+ OV_BIND_SMETHOD(get_province_info_pop_types_key);
+ OV_BIND_SMETHOD(get_province_info_pop_ideologies_key);
+ OV_BIND_SMETHOD(get_province_info_pop_cultures_key);
+ OV_BIND_SMETHOD(get_province_info_rgo_key);
+ OV_BIND_SMETHOD(get_province_info_buildings_key);
+
+ OV_BIND_SMETHOD(get_building_info_building_key);
+ OV_BIND_SMETHOD(get_building_info_level_key);
+ OV_BIND_SMETHOD(get_building_info_expansion_state_key);
+ OV_BIND_SMETHOD(get_building_info_start_date_key);
+ OV_BIND_SMETHOD(get_building_info_end_date_key);
+ OV_BIND_SMETHOD(get_building_info_expansion_progress_key);
+
+ OV_BIND_SMETHOD(get_piechart_info_size_key);
+ OV_BIND_SMETHOD(get_piechart_info_colour_key);
+
+ OV_BIND_SMETHOD(
+ draw_pie_chart,
+ { "image", "stopAngles", "colours", "radius", "shadow_displacement", "shadow_tightness", "shadow_radius",
+ "shadow_thickness", "trim_colour", "trim_size", "gradient_falloff", "gradient_base", "donut", "donut_inner_trim",
+ "donut_inner_radius" }
);
- BSM("GameSingleton", D_METHOD("get_piechart_info_size_key"), &GameSingleton::get_piechart_info_size_key);
- BSM("GameSingleton", D_METHOD("get_piechart_info_colour_key"), &GameSingleton::get_piechart_info_colour_key);
-
- BSM(
- "GameSingleton",
- D_METHOD(
- "draw_pie_chart", "image", "stopAngles", "colours", "radius", "shadow_displacement", "shadow_tightness",
- "shadow_radius", "shadow_thickness", "trim_colour", "trim_size", "gradient_falloff", "gradient_base", "donut",
- "donut_inner_trim", "donut_inner_radius"
- ),
- &GameSingleton::draw_pie_chart
- );
- BSM("GameSingleton", D_METHOD("load_image", "path"), &GameSingleton::load_image);
+ OV_BIND_SMETHOD(load_image, { "path" });
}
void GameSingleton::draw_pie_chart(
diff --git a/extension/src/openvic-extension/GameSingleton.hpp b/extension/src/openvic-extension/GameSingleton.hpp
index 1d92ef0..ec26c3c 100644
--- a/extension/src/openvic-extension/GameSingleton.hpp
+++ b/extension/src/openvic-extension/GameSingleton.hpp
@@ -11,7 +11,7 @@ namespace OpenVic {
class GameSingleton : public godot::Object {
GDCLASS(GameSingleton, godot::Object)
- static GameSingleton* singleton;
+ inline static GameSingleton* singleton = nullptr;
GameManager game_manager;
Dataloader dataloader;
diff --git a/extension/src/openvic-extension/MapMesh.cpp b/extension/src/openvic-extension/MapMesh.cpp
index e407391..a557105 100644
--- a/extension/src/openvic-extension/MapMesh.cpp
+++ b/extension/src/openvic-extension/MapMesh.cpp
@@ -2,24 +2,26 @@
#include <godot_cpp/templates/vector.hpp>
+#include "openvic-extension/utility/ClassBindings.hpp"
+
using namespace godot;
using namespace OpenVic;
void MapMesh::_bind_methods() {
- ClassDB::bind_method(D_METHOD("set_aspect_ratio", "ratio"), &MapMesh::set_aspect_ratio);
- ClassDB::bind_method(D_METHOD("get_aspect_ratio"), &MapMesh::get_aspect_ratio);
+ OV_BIND_METHOD(MapMesh::set_aspect_ratio, { "ratio" });
+ OV_BIND_METHOD(MapMesh::get_aspect_ratio);
- ClassDB::bind_method(D_METHOD("set_repeat_proportion", "proportion"), &MapMesh::set_repeat_proportion);
- ClassDB::bind_method(D_METHOD("get_repeat_proportion"), &MapMesh::get_repeat_proportion);
+ OV_BIND_METHOD(MapMesh::set_repeat_proportion, { "proportion" });
+ OV_BIND_METHOD(MapMesh::get_repeat_proportion);
- ClassDB::bind_method(D_METHOD("set_subdivide_width", "divisions"), &MapMesh::set_subdivide_width);
- ClassDB::bind_method(D_METHOD("get_subdivide_width"), &MapMesh::get_subdivide_width);
+ OV_BIND_METHOD(MapMesh::set_subdivide_width, { "divisions" });
+ OV_BIND_METHOD(MapMesh::get_subdivide_width);
- ClassDB::bind_method(D_METHOD("set_subdivide_depth", "divisions"), &MapMesh::set_subdivide_depth);
- ClassDB::bind_method(D_METHOD("get_subdivide_depth"), &MapMesh::get_subdivide_depth);
+ OV_BIND_METHOD(MapMesh::set_subdivide_depth, { "divisions" });
+ OV_BIND_METHOD(MapMesh::get_subdivide_depth);
- ClassDB::bind_method(D_METHOD("get_core_aabb"), &MapMesh::get_core_aabb);
- ClassDB::bind_method(D_METHOD("is_valid_uv_coord"), &MapMesh::is_valid_uv_coord);
+ OV_BIND_METHOD(MapMesh::get_core_aabb);
+ OV_BIND_METHOD(MapMesh::is_valid_uv_coord);
ADD_PROPERTY(
PropertyInfo(Variant::FLOAT, "aspect_ratio", PROPERTY_HINT_NONE, "suffix:m"), "set_aspect_ratio", "get_aspect_ratio"
diff --git a/extension/src/openvic-extension/utility/ClassBindings.hpp b/extension/src/openvic-extension/utility/ClassBindings.hpp
new file mode 100644
index 0000000..616250b
--- /dev/null
+++ b/extension/src/openvic-extension/utility/ClassBindings.hpp
@@ -0,0 +1,90 @@
+#pragma once
+
+#include <concepts>
+#include <initializer_list>
+#include <string_view>
+#include <type_traits>
+
+#include <godot_cpp/core/class_db.hpp>
+#include <godot_cpp/variant/string_name.hpp>
+
+#include "openvic-extension/utility/StringLiteral.hpp"
+
+namespace godot {
+ class Object;
+}
+
+#define OV_BIND_METHOD(Function, ...) \
+ ::OpenVic::detail::bind_method<::OpenVic::detail::get_function_name<#Function>()>(&Function __VA_OPT__(, ) __VA_ARGS__)
+
+#define OV_BIND_SMETHOD(Function, ...) \
+ ::OpenVic::detail::bind_static_method<::OpenVic::detail::get_function_name<#Function>()>( \
+ get_class_static(), &Function __VA_OPT__(, ) __VA_ARGS__ \
+ )
+
+#define OV_BIND_SMETHOD_T(ClassType, Function, ...) \
+ ::OpenVic::detail::bind_static_method<ClassType, ::OpenVic::detail::get_function_name<#Function>()>( \
+ &Function __VA_OPT__(, ) __VA_ARGS__ \
+ )
+
+namespace OpenVic::detail {
+ template<typename Func>
+ concept IsFunctionPointer = std::is_function_v<std::remove_pointer_t<Func>>;
+ template<typename Func>
+ concept IsMemberFunctionPointer = std::is_member_function_pointer_v<Func>;
+
+ template<StringLiteral In>
+ consteval auto get_function_name() {
+ constexpr auto result = [] {
+ constexpr auto prefix = std::string_view { "::" };
+
+ constexpr std::string_view in_sv = In;
+ constexpr auto start = in_sv.find_last_of(prefix);
+
+ if constexpr (start == std::string_view::npos) {
+ return In;
+ } else {
+ constexpr auto result = in_sv.substr(start + 1);
+ return StringLiteral<result.size()> { result };
+ }
+ }();
+
+ return result;
+ }
+
+ template<StringLiteral Name, IsMemberFunctionPointer Func, typename... DefaultsT>
+ void bind_method(Func func, std::initializer_list<godot::StringName> arg_names, DefaultsT&&... defaults) {
+ godot::MethodDefinition definition { Name.data() };
+ definition.args = { arg_names };
+ godot::ClassDB::bind_method(definition, func, defaults...);
+ }
+
+ template<StringLiteral Name, IsMemberFunctionPointer Func, typename... DefaultsT>
+ void bind_method(Func func, DefaultsT&&... defaults) {
+ bind_method<Name, Func>(func, {}, defaults...);
+ }
+
+ template<StringLiteral Name, IsFunctionPointer Func, typename... DefaultsT>
+ void bind_static_method(
+ godot::StringName class_name, Func func, std::initializer_list<godot::StringName> arg_names, DefaultsT&&... defaults
+ ) {
+ godot::MethodDefinition definition { Name.data() };
+ definition.args = { arg_names };
+ godot::ClassDB::bind_static_method(class_name, definition, func, defaults...);
+ }
+
+ template<StringLiteral Name, IsFunctionPointer Func, typename... DefaultsT>
+ void bind_static_method(godot::StringName class_name, Func func, DefaultsT&&... defaults) {
+ bind_static_method<Name>(class_name, func, {}, defaults...);
+ }
+
+ template<std::derived_from<godot::Object> ClassT, StringLiteral Name, IsFunctionPointer Func, typename... DefaultsT>
+ void bind_static_method(Func func, std::initializer_list<godot::StringName> arg_names, DefaultsT&&... defaults) {
+ bind_static_method<Name>(ClassT::get_class_static(), func, arg_names, defaults...);
+ }
+
+ template<std::derived_from<godot::Object> ClassT, StringLiteral Name, IsFunctionPointer Func, typename... DefaultsT>
+ void bind_static_method(Func func, DefaultsT&&... defaults) {
+ bind_static_method<ClassT, Name>(func, {}, defaults...);
+ }
+}
diff --git a/extension/src/openvic-extension/utility/StringLiteral.hpp b/extension/src/openvic-extension/utility/StringLiteral.hpp
new file mode 100644
index 0000000..90b18cd
--- /dev/null
+++ b/extension/src/openvic-extension/utility/StringLiteral.hpp
@@ -0,0 +1,106 @@
+#pragma once
+
+#include <algorithm>
+#include <cassert>
+#include <cstddef>
+#include <iterator>
+#include <string_view>
+#include <type_traits>
+
+namespace OpenVic {
+ template<std::size_t N>
+ struct StringLiteral {
+ constexpr StringLiteral(const char (&str)[N]) {
+ std::copy_n(str, N, value);
+ }
+
+ consteval StringLiteral(std::string_view string) {
+ assert(string.size() == N);
+ std::copy_n(string.begin(), N, value);
+ }
+
+ char value[N];
+ static const constexpr std::integral_constant<std::size_t, N - 1> size {};
+
+ struct iterator {
+ using iterator_concept [[maybe_unused]] = std::contiguous_iterator_tag;
+ using difference_type = std::ptrdiff_t;
+ using element_type = const char; // element_type is a reserved name that must be used in the definition
+ using pointer = element_type*;
+ using reference = element_type&;
+
+ constexpr iterator() = default;
+ constexpr iterator(pointer p) : _ptr(p) {}
+ constexpr reference operator*() const {
+ return *_ptr;
+ }
+ constexpr pointer operator->() const {
+ return _ptr;
+ }
+ constexpr auto& operator++() {
+ _ptr++;
+ return *this;
+ }
+ constexpr auto operator++(int) {
+ auto tmp = *this;
+ ++(*this);
+ return tmp;
+ }
+ constexpr iterator& operator+=(int i) {
+ _ptr += i;
+ return *this;
+ }
+ constexpr iterator operator+(const difference_type other) const {
+ return _ptr + other;
+ }
+ constexpr friend iterator operator+(const difference_type value, const iterator& other) {
+ return other + value;
+ }
+ constexpr iterator& operator--() {
+ _ptr--;
+ return *this;
+ }
+ constexpr iterator operator--(int) {
+ iterator tmp = *this;
+ --(*this);
+ return tmp;
+ }
+ constexpr iterator& operator-=(int i) {
+ _ptr -= i;
+ return *this;
+ }
+ constexpr difference_type operator-(const iterator& other) const {
+ return _ptr - other._ptr;
+ }
+ constexpr iterator operator-(const difference_type other) const {
+ return _ptr - other;
+ }
+ friend iterator operator-(const difference_type value, const iterator& other) {
+ return other - value;
+ }
+ constexpr reference operator[](difference_type idx) const {
+ return _ptr[idx];
+ }
+ constexpr auto operator<=>(const iterator&) const = default; // three-way comparison C++20
+
+ private:
+ pointer _ptr;
+ };
+
+ constexpr iterator begin() const {
+ return iterator { &value };
+ }
+
+ constexpr iterator end() const {
+ return iterator { &value + N };
+ }
+
+ constexpr operator std::string_view() const {
+ return std::string_view { value, N };
+ }
+
+ constexpr decltype(auto) data() const {
+ return static_cast<std::string_view>(*this).data();
+ }
+ };
+}