ipa: libipa: vector: Add scalar constructor

The default constructor leaves the vector data uninitialized. Add a
constructor to fill the vector with copies of a scalar value, and fix
the documentation of the default constructor.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>

src/ipa/libipa/vector.cpp

@@ -29,7 +29,13 @@ namespace ipa {
 
 /**
  * \fn Vector::Vector()
- * \brief Construct a zero vector
+ * \brief Construct an uninitialized vector
+ */
+
+/**
+ * \fn Vector::Vector(T scalar)
+ * \brief Construct a vector filled with a \a scalar value
+ * \param[in] scalar The scalar value
  */
 
 /**

src/ipa/libipa/vector.h

@@ -35,6 +35,11 @@ class Vector
 public:
 	constexpr Vector() = default;
 
+	constexpr explicit Vector(T scalar)
+	{
+		data_.fill(scalar);
+	}
+
 	constexpr Vector(const std::array<T, Rows> &data)
 	{
 		for (unsigned int i = 0; i < Rows; i++)