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, class BinaryType = std::vector<std::uint8_t>>
void nlohmann::basic_json< ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer, BinaryType >::swap |
( |
string_t & |
other | ) |
|
|
inline |
Exchanges the contents of a JSON string 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 | string to exchange the contents with |
- Exceptions
-
type_error.310 | when JSON value is not a string; example: "cannot
use swap() with boolean" |
- Complexity
- Constant.
- Example
- The example below shows how strings can be swapped with
swap()
.
2 #include <nlohmann/json.hpp>
9 json value = {
"the good",
"the bad",
"the ugly" };
15 value[1].swap(
string);
18 std::cout <<
"value = " <<
value <<
'\n';
19 std::cout <<
"string = " <<
string <<
'\n';
ValueType value(const typename object_t::key_type &key, const ValueType &default_value) const
access specified object element with default value
StringType string_t
a type for a string
basic_json<> json
default JSON class
Output (play with this example online): value = ["the good","the fast","the ugly"]
string = the bad
The example code above can be translated withg++ -std=c++11 -Isingle_include doc/examples/swap__string_t.cpp -o swap__string_t
- Since
- version 1.0.0
Definition at line 22495 of file json.hpp.