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◆ swap() [1/4]
template< template< typename U, typename V, typename... Args > class ObjectType = std::map, template< typename U, typename... Args > class ArrayType = std::vector, class StringType = std::string, class BooleanType = bool, class NumberIntegerType = std::int64_t, class NumberUnsignedType = std::uint64_t, class NumberFloatType = double, template< typename U > class AllocatorType = std::allocator, template< typename T, typename SFINAE= void > class JSONSerializer = adl_serializer>
Exchanges the contents of a JSON array with those of other. Does not invoke any move, copy, or swap operations on individual elements. All iterators and references remain valid. The past-the-end iterator is invalidated.
- Parameters
-
[in,out] | other | array to exchange the contents with |
- Exceptions
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std::domain_error | when JSON value is not an array; example: "cannot use swap() with string" |
- Complexity\n Constant.
- Example\n The example below shows how arrays can be swapped with
swap() .
17 std::cout << "value = " << value << '\n';
18 std::cout << "array = " << array << '\n';
static basic_json array(std::initializer_list< basic_json > init=std::initializer_list< basic_json >()) explicitly create an array from an initializer list
void swap(reference other) noexcept(std::is_nothrow_move_constructible< value_t >::value and std::is_nothrow_move_assignable< value_t >::value and std::is_nothrow_move_constructible< json_value >::value and std::is_nothrow_move_assignable< json_value >::value) exchanges the values
ArrayType< basic_json, AllocatorType< basic_json > > array_t a type for an array
@ value the parser finished reading a JSON value
a class to store JSON values
basic_json<> json default JSON class
Output (play with this example online):
value = {"array":["Snap","Crackle","Pop"]}
array = [1,2,3,4]
The example code above can be translated with g++ -std=c++11 -Isrc doc/examples/swap__array_t.cpp -o swap__array_t
- Since
- version 1.0.0
Definition at line 5770 of file json.hpp.
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