uri: add minimal copy and move operators

uri.cpp

@@ -23,6 +23,26 @@ uri::uri (const std::string &_value):
 { ; }
 
 
+//-----------------------------------------------------------------------------
+uri::uri (uri const &rhs)
+    : m_views (rhs.m_views)
+    , m_value (rhs.m_value)
+{
+    auto const offset = rhs.m_value.data () - m_value.data ();
+    for (auto &i: m_views)
+        i = { i.begin () - offset, i.end () - offset };
+}
+
+
+//-----------------------------------------------------------------------------
+uri& uri::operator= (uri &&rhs) noexcept
+{
+    m_views = std::move (rhs.m_views);
+    m_value = std::move (rhs.m_value);
+    return *this;
+}
+
+
 ///////////////////////////////////////////////////////////////////////////////
 static uint8_t
 hex_to_uint (char c)

uri.hpp

@@ -33,10 +33,16 @@ namespace cruft {
     class uri {
     public:
         uri (std::string &&);
+        uri& operator= (uri &&) noexcept;
+
+        uri (uri const&);
+        uri& operator= (uri const&);
+
         uri (const std::string&);
         uri (const char *);
         uri (view<const char *>);
 
+
         class parse_error : public std::runtime_error
         { using runtime_error::runtime_error; };