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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 = int64_t, class NumberUnsignedType = uint64_t, class NumberFloatType = double, template< typename U > class AllocatorType = std::allocator>
| void nlohmann::basic_json< ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType >::swap |
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string_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 | string to exchange the contents with |
- Exceptions
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| std::domain_error | when JSON value is not a string; example: "cannot
use swap() with boolean" |
- Complexity
- Constant.
- Example
- The example below shows how JSON values can be swapped.
8 json value = { "the good", "the bad", "the ugly" }; 14 value[1]. swap( string); 17 std::cout << "value = " << value << '\n'; 18 std::cout << "string = " << string << '\n'; a class to store JSON values
StringType string_t a type for a string
namespace for Niels Lohmann
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
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 -Isrc doc/examples/swap__string_t.cpp -o swap__string_t
- Since
- version 1.0.0
Definition at line 4969 of file json.hpp.
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