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◆ basic_json() [6/10]
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>>
nlohmann::basic_json< ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer, BinaryType >::basic_json |
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const basic_json< ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer, BinaryType > & |
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Constructs a JSON array value by creating cnt copies of a passed value. In case cnt is 0 , an empty array is created.
- Parameters
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[in] | cnt | the number of JSON copies of val to create |
[in] | val | the JSON value to copy |
- Postcondition
std::distance(begin(),end()) == cnt holds.
- Complexity
- Linear in cnt.
- Exception safety
- Strong guarantee: if an exception is thrown, there are no changes to any JSON value.
- Example
- The following code shows examples for the basic_json(size_type, const basic_json&) constructor.
2#include <nlohmann/json.hpp>
15 std::cout << array_0 << '\n';
16 std::cout << array_1 << '\n';
17 std::cout << array_5 << '\n';
ValueType value(const typename object_t::key_type &key, const ValueType &default_value) const access specified object element with default value
basic_json<> json default JSON class
Output (play with this example online): []
["Hello"]
["Hello","Hello","Hello","Hello","Hello"]
The example code above can be translated with g++ -std=c++11 -Isingle_include doc/examples/basic_json__size_type_basic_json.cpp -o basic_json__size_type_basic_json
- Since
- version 1.0.0
Definition at line 19488 of file json.hpp.
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