BLI: add Vector/Array.fill methods

source/blender/blenlib/BLI_array.hh

@@ -268,6 +268,14 @@ class Array {
     return size_ == 0;
   }
 
+  /**
+   * Copies the given value to every element in the array.
+   */
+  void fill(const T &value) const
+  {
+    initialized_fill_n(data_, size_, value);
+  }
+
   /**
    * Get a pointer to the beginning of the array.
    */

source/blender/blenlib/BLI_vector.hh

@@ -702,6 +702,14 @@ class Vector {
     return this->first_index_of_try(value) != -1;
   }
 
+  /**
+   * Copies the given value to every element in the vector.
+   */
+  void fill(const T &value) const
+  {
+    initialized_fill_n(begin_, this->size(), value);
+  }
+
   /**
    * Get access to the underlying array.
    */

tests/gtests/blenlib/BLI_array_test.cc

@@ -161,4 +161,16 @@ TEST(array, NoInitializationSizeConstructor)
   }
 }
 
+TEST(array, Fill)
+{
+  Array<int> array(5);
+  array.fill(3);
+  EXPECT_EQ(array.size(), 5u);
+  EXPECT_EQ(array[0], 3);
+  EXPECT_EQ(array[1], 3);
+  EXPECT_EQ(array[2], 3);
+  EXPECT_EQ(array[3], 3);
+  EXPECT_EQ(array[4], 3);
+}
+
 }  // namespace blender

tests/gtests/blenlib/BLI_vector_test.cc

@@ -624,4 +624,16 @@ TEST(vector, ConstructVoidPointerVector)
   EXPECT_EQ(vec.size(), 3);
 }
 
+TEST(vector, Fill)
+{
+  Vector<int> vec(5);
+  vec.fill(3);
+  EXPECT_EQ(vec.size(), 5u);
+  EXPECT_EQ(vec[0], 3);
+  EXPECT_EQ(vec[1], 3);
+  EXPECT_EQ(vec[2], 3);
+  EXPECT_EQ(vec[3], 3);
+  EXPECT_EQ(vec[4], 3);
+}
+
 }  // namespace blender