From 01f98ce88950cdb729f5db58bf26f2fffa1c326c Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Wed, 12 Jan 2022 00:53:13 +0800
Subject: ...

---
 demos/main/main.cpp                    |  1 -
 include/cru/common/ClonablePtr.hpp     | 48 +++++++++++++++++++++-------------
 include/cru/common/Event.hpp           |  1 -
 include/cru/platform/HeapDebug.hpp     |  7 -----
 src/platform/CMakeLists.txt            |  2 +-
 src/platform/filesystem/CMakeLists.txt |  0
 6 files changed, 31 insertions(+), 28 deletions(-)
 delete mode 100644 include/cru/platform/HeapDebug.hpp
 create mode 100644 src/platform/filesystem/CMakeLists.txt

diff --git a/demos/main/main.cpp b/demos/main/main.cpp
index c98b9fcc..9a3e8d62 100644
--- a/demos/main/main.cpp
+++ b/demos/main/main.cpp
@@ -1,5 +1,4 @@
 #include <memory>
-#include "cru/platform/HeapDebug.hpp"
 #include "cru/platform/bootstrap/Bootstrap.hpp"
 #include "cru/platform/gui/Base.hpp"
 #include "cru/platform/gui/UiApplication.hpp"
diff --git a/include/cru/common/ClonablePtr.hpp b/include/cru/common/ClonablePtr.hpp
index 5e4b80c9..39b5b454 100644
--- a/include/cru/common/ClonablePtr.hpp
+++ b/include/cru/common/ClonablePtr.hpp
@@ -93,6 +93,18 @@ class ClonablePtr {
   element_type& operator*() const noexcept { return *ptr_; }
   pointer operator->() const noexcept { return ptr_.get(); }
 
+  int Compare(const ClonablePtr& other) const noexcept {
+    if (ptr_ == other.ptr_) {
+      return 0;
+    } else if (ptr_ < other.ptr_) {
+      return -1;
+    } else {
+      return 1;
+    }
+  }
+
+  int Compare(nullptr_t) const noexcept { return ptr_ ? 1 : 0; }
+
  private:
   std::unique_ptr<element_type> ptr_;
 };
@@ -104,92 +116,92 @@ void swap(ClonablePtr<T>& left, ClonablePtr<T>& right) noexcept {
 
 template <typename T>
 bool operator==(const ClonablePtr<T>& left, const ClonablePtr<T>& right) {
-  return left.get() == right.get();
+  return left.Compare(right) == 0;
 }
 
 template <typename T>
 bool operator!=(const ClonablePtr<T>& left, const ClonablePtr<T>& right) {
-  return left.get() != right.get();
+  return left.Compare(right) != 0;
 }
 
 template <typename T>
 bool operator<(const ClonablePtr<T>& left, const ClonablePtr<T>& right) {
-  return left.get() < right.get();
+  return left.Compare(right) < 0;
 }
 
 template <typename T>
 bool operator<=(const ClonablePtr<T>& left, const ClonablePtr<T>& right) {
-  return left.get() <= right.get();
+  return left.Compare(right) <= 0;
 }
 
 template <typename T>
 bool operator>(const ClonablePtr<T>& left, const ClonablePtr<T>& right) {
-  return left.get() > right.get();
+  return left.Compare(right) > 0;
 }
 
 template <typename T>
 bool operator>=(const ClonablePtr<T>& left, const ClonablePtr<T>& right) {
-  return left.get() >= right.get();
+  return left.Compare(right) >= 0;
 }
 
 template <typename T>
 bool operator==(const ClonablePtr<T>& left, std::nullptr_t) {
-  return left.get() == nullptr;
+  return left.Compare(nullptr) == 0;
 }
 
 template <typename T>
 bool operator!=(const ClonablePtr<T>& left, std::nullptr_t) {
-  return left.get() != nullptr;
+  return left.Compare(nullptr) != 0;
 }
 
 template <typename T>
 bool operator<(const ClonablePtr<T>& left, std::nullptr_t) {
-  return left.get() < nullptr;
+  return left.Compare(nullptr) < 0;
 }
 
 template <typename T>
 bool operator<=(const ClonablePtr<T>& left, std::nullptr_t) {
-  return left.get() <= nullptr;
+  return left.Compare(nullptr) <= 0;
 }
 
 template <typename T>
 bool operator>(const ClonablePtr<T>& left, std::nullptr_t) {
-  return left.get() > nullptr;
+  return left.Compare(nullptr) > 0;
 }
 
 template <typename T>
 bool operator>=(const ClonablePtr<T>& left, std::nullptr_t) {
-  return left.get() >= nullptr;
+  return left.Compare(nullptr) >= 0;
 }
 
 template <typename T>
 bool operator==(std::nullptr_t, const ClonablePtr<T>& right) {
-  return nullptr == right.get();
+  return right.Compare(nullptr) == 0;
 }
 
 template <typename T>
 bool operator!=(std::nullptr_t, const ClonablePtr<T>& right) {
-  return nullptr != right.get();
+  return right.Compare(nullptr) != 0;
 }
 
 template <typename T>
 bool operator<(std::nullptr_t, const ClonablePtr<T>& right) {
-  return nullptr < right.get();
+  return right.Compare(nullptr) > 0;
 }
 
 template <typename T>
 bool operator<=(std::nullptr_t, const ClonablePtr<T>& right) {
-  return nullptr <= right.get();
+  return right.Compare(nullptr) >= 0;
 }
 
 template <typename T>
 bool operator>(std::nullptr_t, const ClonablePtr<T>& right) {
-  return nullptr > right.get();
+  return right.Compare(nullptr) < 0;
 }
 
 template <typename T>
 bool operator>=(std::nullptr_t, const ClonablePtr<T>& right) {
-  return nullptr >= right.get();
+  return right.Compare(nullptr) <= 0;
 }
 
 }  // namespace cru
diff --git a/include/cru/common/Event.hpp b/include/cru/common/Event.hpp
index b6999aa4..5d60c5b3 100644
--- a/include/cru/common/Event.hpp
+++ b/include/cru/common/Event.hpp
@@ -8,7 +8,6 @@
 #include <initializer_list>
 #include <memory>
 #include <utility>
-#include <variant>
 #include <vector>
 
 namespace cru {
diff --git a/include/cru/platform/HeapDebug.hpp b/include/cru/platform/HeapDebug.hpp
deleted file mode 100644
index 10ebfd2c..00000000
--- a/include/cru/platform/HeapDebug.hpp
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-#include "cru/common/PreConfig.hpp"
-
-namespace cru::platform {
-// Setup the heap debug function. Currently I only use this on Windows...
-void SetupHeapDebug();
-}  // namespace cru::platform
diff --git a/src/platform/CMakeLists.txt b/src/platform/CMakeLists.txt
index 8d6929ec..466b6900 100644
--- a/src/platform/CMakeLists.txt
+++ b/src/platform/CMakeLists.txt
@@ -9,13 +9,13 @@ target_sources(cru_platform_base PUBLIC
 	${CRU_PLATFORM_BASE_INCLUDE_DIR}/Color.hpp
 	${CRU_PLATFORM_BASE_INCLUDE_DIR}/Exception.hpp
 	${CRU_PLATFORM_BASE_INCLUDE_DIR}/GraphicsBase.hpp
-	${CRU_PLATFORM_BASE_INCLUDE_DIR}/HeapDebug.hpp
 	${CRU_PLATFORM_BASE_INCLUDE_DIR}/Matrix.hpp
 	${CRU_PLATFORM_BASE_INCLUDE_DIR}/Resource.hpp
 )
 target_link_libraries(cru_platform_base PUBLIC cru_base)
 target_compile_definitions(cru_platform_base PRIVATE CRU_PLATFORM_EXPORT_API)
 
+add_subdirectory(filesystem)
 add_subdirectory(graphics)
 add_subdirectory(gui)
 
diff --git a/src/platform/filesystem/CMakeLists.txt b/src/platform/filesystem/CMakeLists.txt
new file mode 100644
index 00000000..e69de29b
-- 
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