Fix compile clang3.8: Moving temp objects prevents copy elision

alib2algo/src/tree/generate/RandomTreeFactory.cpp

@@ -274,7 +274,7 @@ UnrankedTree RandomTreeFactory::generateUnrankedTree ( int depth, int nodesCount
 	for ( std::vector < char >::const_iterator it = alphabet.begin ( ); it != alphabet.end ( ); ++it )
 		treeAlphabet.insert ( alphabet::symbolFrom ( * it ) );
-	UnrankedTree tree ( treeAlphabet, std::move ( root->createUnrankedNode ( ) ) );
+	UnrankedTree tree ( treeAlphabet, root->createUnrankedNode ( ) );
 	delete root;
 	return tree;
 }
@@ -292,7 +292,7 @@ UnrankedPattern RandomTreeFactory::generateUnrankedPattern ( int depth, int node
 	alphabet::Symbol subtreeWildcard ( alphabet::SubtreeWildcardSymbol::SUBTREE_WILDCARD );
 	treeAlphabet.insert ( subtreeWildcard );
-	UnrankedPattern tree ( std::move ( subtreeWildcard ), treeAlphabet, std::move ( root->createUnrankedPatternNode ( ) ) );
+	UnrankedPattern tree ( std::move ( subtreeWildcard ), treeAlphabet, root->createUnrankedPatternNode ( ) );
 	delete root;
 	return tree;
 }
@@ -314,7 +314,7 @@ RankedTree RandomTreeFactory::generateRankedTree ( int depth, int nodesCount, in
 			treeRankedAlphabet.insert ( alphabet::RankedSymbol ( * i, it->first ) );
 	}
-	RankedTree tree ( treeRankedAlphabet, std::move ( root->createRankedNode ( ) ) );
+	RankedTree tree ( treeRankedAlphabet, root->createRankedNode ( ) );
 	delete root;
 	return tree;
 }
@@ -338,7 +338,7 @@ RankedPattern RandomTreeFactory::generateRankedPattern ( int depth, int nodesCou
 	alphabet::RankedSymbol subtreeWildcard ( alphabet::Symbol ( alphabet::SubtreeWildcardSymbol::SUBTREE_WILDCARD ), 0 );
 	treeRankedAlphabet.insert ( subtreeWildcard );
-	RankedPattern tree ( std::move ( subtreeWildcard ), treeRankedAlphabet, std::move ( root->createRankedPatternNode ( ) ) );
+	RankedPattern tree ( std::move ( subtreeWildcard ), treeRankedAlphabet, root->createRankedPatternNode ( ) );
 	delete root;
 	return tree;
 }