35 lines
		
	
	
	
		
			839 B
		
	
	
	
		
			C++
		
	
	
	
	
	
			
		
		
	
	
			35 lines
		
	
	
	
		
			839 B
		
	
	
	
		
			C++
		
	
	
	
	
	
| //
 | |
| // immer: immutable data structures for C++
 | |
| // Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
 | |
| //
 | |
| // This software is distributed under the Boost Software License, Version 1.0.
 | |
| // See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
 | |
| //
 | |
| 
 | |
| #include <cassert>
 | |
| #include <immer/vector.hpp>
 | |
| 
 | |
| // include:move-bad/start
 | |
| immer::vector<int> do_stuff(const immer::vector<int> v)
 | |
| {
 | |
|     return std::move(v).push_back(42);
 | |
| }
 | |
| // include:move-bad/end
 | |
| 
 | |
| // include:move-good/start
 | |
| immer::vector<int> do_stuff_better(immer::vector<int> v)
 | |
| {
 | |
|     return std::move(v).push_back(42);
 | |
| }
 | |
| // include:move-good/end
 | |
| 
 | |
| int main()
 | |
| {
 | |
|     auto v  = immer::vector<int>{};
 | |
|     auto v1 = do_stuff(v);
 | |
|     auto v2 = do_stuff_better(v);
 | |
|     assert(v1.size() == 1);
 | |
|     assert(v2.size() == 1);
 | |
|     assert(v1[0] == 42);
 | |
|     assert(v2[0] == 42);
 | |
| }
 |