alloc/raw/linear: enable move operators

alloc/raw/linear.cpp

@@ -22,6 +22,26 @@ linear::linear (cruft::view<std::byte*> _data):
 { ; }
 
 
+///////////////////////////////////////////////////////////////////////////////
+linear::linear (linear &&rhs)
+    : m_begin  (std::exchange (rhs.m_begin,  nullptr))
+    , m_end    (std::exchange (rhs.m_end,    nullptr))
+    , m_cursor (std::exchange (rhs.m_cursor, nullptr))
+{ ; }
+
+
+//-----------------------------------------------------------------------------
+linear&
+linear::operator= (cruft::alloc::raw::linear &&rhs)
+{
+    m_begin  = std::exchange (rhs.m_begin,  nullptr);
+    m_end    = std::exchange (rhs.m_end,    nullptr);
+    m_cursor = std::exchange (rhs.m_cursor, nullptr);
+
+    return *this;
+}
+
+
 ///////////////////////////////////////////////////////////////////////////////
 std::byte*
 linear::data (void)

alloc/raw/linear.hpp

@@ -21,9 +21,10 @@ namespace cruft::alloc::raw {
     class linear {
     public:
         linear (const linear&) = delete;
-        linear (linear&&) = delete;
         linear& operator= (const linear&) = delete;
-        linear& operator= (linear&&) = delete;
+
+        linear (linear&&);
+        linear& operator= (linear&&);
 
         linear (cruft::view<std::byte*> _data);
 
@@ -98,8 +99,8 @@ namespace cruft::alloc::raw {
         size_t remain   (void) const;
 
     protected:
-        std::byte *const m_begin;
+        std::byte *m_begin;
-        std::byte *const m_end;
+        std::byte *m_end;
         std::byte *m_cursor;
     };
 }