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◆ swap() [5/6]
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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binary_t & |
other | ) |
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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
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[in,out] | other | binary to exchange the contents with |
- Exceptions
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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> 18 std::cout << "value = " << value << '\n'; 19 std::cout << "binary = " << json(binary) << '\n'; basic_json<> json default JSON class
nlohmann::byte_container_with_subtype< BinaryType > binary_t a type for a packed binary type
static basic_json binary(const typename binary_t::container_type &init) explicitly create a binary array (without subtype)
void swap(reference other) noexcept(std::is_nothrow_move_constructible< value_t >::value &&std::is_nothrow_move_assignable< value_t >::value &&std::is_nothrow_move_constructible< json_value >::value &&std::is_nothrow_move_assignable< json_value >::value) exchanges the values
Output (play with this example online):^^ value = {"bytes":[4,5,6],"subtype":null}
binary = {"bytes":[1,2,3],"subtype":null}
^^ The example code above can be translated withg++ -std=c++11 -Isingle_include doc/examples/swap__binary_t.cpp -o swap__binary_t
- Since
- version 3.8.0
Definition at line 22528 of file json.hpp.
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