Fix fast_vector assign

Author: fdwr

Common.FastVector.h

@@ -227,6 +227,7 @@ class fast_vector<T, 0, ShouldInitializeElements>
 
     // Clear any existing elements and copy the new elements from the iterable range.
     template <typename IteratorType>
+    requires(!std::is_convertible_v<IteratorType, size_t>)
     void assign(IteratorType begin, IteratorType end)
     {
         clear();
@@ -238,13 +239,12 @@ class fast_vector<T, 0, ShouldInitializeElements>
     }
 
     // Clear any existing elements and copy the new elements from the iterable range.
-    template <typename IteratorType>
     void assign(size_t newSize, const T& value)
     {
         clear();
 
         reserve(newSize);
-        std::uninitialized_fill(begin(), end(), /*out*/ data_);
+        std::uninitialized_fill(begin(), end(), /*out*/ value);
         size_ = newSize;
     }
 

Common.FastVector.ixx

@@ -186,6 +186,12 @@ void fast_vector_test()
     assert(ints[0] == 1);
     assert(ints[2] == 3);
 
+    auto intAssignmentInitializerList = { 1,2,3 };
+    std::vector<int> intAssignmentVector({1,2,3});
+    ints.assign(intAssignmentInitializerList.begin(), intAssignmentInitializerList.end());
+    ints.assign(intAssignmentVector.begin(), intAssignmentVector.end());
+    ints.assign(3, 0);
+
     // Create another vector from the old one.
     ints2[0] = 1;
     ints2[2] = 3;