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>
Copy assignment operator. Copies a JSON value via the "copy and swap" strategy: It is expressed in terms of the copy constructor, destructor, and the swap()
member function.
- Parameters
-
[in] | other | value to copy from |
- Complexity^^ Linear.
- Requirements^^ This function helps basic_json satisfying the
- Container requirements:
- The complexity is linear.
- Example^^ The code below shows and example for the copy assignment. It
- creates a copy of value
a
which is then swapped with b
. Finally, the copy of a
(which is the null value after the swap) is destroyed. ^^ 2 #include <nlohmann/json.hpp> 16 std::cout << a <<
'\n';
17 std::cout << b <<
'\n';
basic_json<> json
default JSON class
Output (play with this example online):^^ 23
23
^^ The example code above can be translated withg++ -std=c++11 -Isingle_include doc/examples/basic_json__copyassignment.cpp -o basic_json__copyassignment
- Since
- version 1.0.0
Definition at line 14256 of file json.hpp.