Final super game commit

Author: uselessgoddess

cpp/Platform.Collections.Tests/StackTests.cpp

@@ -2,7 +2,16 @@
 
 namespace Platform::Collections::Tests 
 {
-    struct EmptyStack : public Stacks::IStack<int> 
+    TEST(StackTests, Concept) 
+    {
+        Stacks::CStack<int> auto stack = std::stack<int>{};
+        stack.push(1);
+        ASSERT_EQ(stack.top(), 1);
+        stack.pop();
+        ASSERT_TRUE(stack.empty());
+    }
+
+    struct EmptyStack : public Stacks::IStack<int>
     {
         bool empty() const {}
 
@@ -15,22 +24,13 @@ namespace Platform::Collections::Tests
         const int &top() const {}
     };
 
-    TEST(StackTests, Concept) 
-    {
-        Stacks::CStack<int> auto stack = std::stack<int>{};
-        stack.push(1);
-        ASSERT_EQ(stack.top(), 1);
-        stack.pop();
-        ASSERT_TRUE(stack.empty());
-    }
-
     TEST(StackTests, Interface) 
     {
-        std::unique_ptr<Stack::IStack<int>> stack = std::make_unique<EmptyStack>();
+        std::unique_ptr<Stacks::IStack<int>> stack = std::make_unique<EmptyStack>();
     }
 
     TEST(StackTests, ConceptInterface) 
     {
-        Stacks::CStack<int> auto stack  = EmptyStack{};
+        Stacks::CStack<int> auto stack = EmptyStack{};
     }
 }

cpp/Platform.Collections/Stacks/CStack.h

@@ -6,14 +6,16 @@ namespace Platform::Collections::Stacks
     concept CStack = requires(TSelf& self, TElement item)
     {
         { self.push(item) };
+
+        { self.pop() };
+
+        { self.top() } -> std::same_as<TElement&>;
     } 
     &&
     requires(const TSelf& self, TElement item)
     {
         { self.empty() } -> std::same_as<bool>;
 
-        { self.pop() };
-
-        { self.top() } -> std::same_as<TElement&>;
+        { self.top() } -> std::same_as<const TElement&>;
     };
 }