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◆ swap() [2/6]
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 |
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array_t & |
other | ) |
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inline |
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
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[in,out] | other | array to exchange the contents with |
- Exceptions
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type_error.310 | when JSON value is not an array; example: "cannot
use swap() with string" |
- Complexity^^ Constant.
- Example^^ The example below shows how arrays can be swapped with
swap() . ^^ 2 #include <nlohmann/json.hpp> 9 json value = {{ "array", {1, 2, 3, 4}}}; 15 value[ "array"].swap(array); 18 std::cout << "value = " << value << '\n'; 19 std::cout << "array = " << array << '\n'; ArrayType< basic_json, AllocatorType< basic_json > > array_t a type for an array
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 withg++ -std=c++11 -Isingle_include doc/examples/swap__array_t.cpp -o swap__array_t
- Since
- version 1.0.0
Definition at line 22429 of file json.hpp.
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