MT#62181 AmArg: switch to default ctors

We are now ready to use the default constructors and assignment
operators. Add move semantics as well.

Change-Id: I89738bff6498979ff9df6bfe1f9489568c4564cf

core/AmArg.cpp

@@ -46,15 +46,6 @@ const char* AmArg::t2str(int type) {
   }
 }
 
-AmArg::AmArg(const AmArg& v)
-  : type(v.type) {
-  switch (type) {
-    default:
-      value = v.value;
-      break;
-  }
-}
-
 AmArg::AmArg(std::map<std::string, std::string>& v)
   : type(Undef) {
   assertStruct();
@@ -240,17 +231,6 @@ const AmArg& AmArg::get(size_t idx) const {
   return std::get<ValueArray>(value)[idx];
 }
 
-AmArg& AmArg::operator=(const AmArg& v) {
-  invalidate();
-  type = v.type;
-  switch (type) {
-    default:
-      value = v.value;
-      break;
-  }
-  return *this;
-}
-
 AmArg& AmArg::operator[](size_t idx) {
   assertArray(idx+1);
   return std::get<ValueArray>(value)[idx];

core/AmArg.h

@@ -128,7 +128,8 @@ class AmArg
    : type(Undef)
   { }
 
- AmArg(const AmArg& v);
+ AmArg(const AmArg& v) = default;
+ AmArg(AmArg&& v) = default;
 
  AmArg(const int& v)
    : type(Int),
@@ -197,7 +198,8 @@ class AmArg
 
   short getType() const { return type; }
 
-  AmArg& operator=(const AmArg& rhs);
+  AmArg& operator=(const AmArg& rhs) = default;
+  AmArg& operator=(AmArg&& rhs) = default;
 
 #define isArgUndef(a) (AmArg::Undef == a.getType())
 #define isArgArray(a) (AmArg::Array == a.getType())