mirror of
https://github.com/nlohmann/json.git
synced 2026-10-01 06:25:17 +00:00
2f087c6b73
- API pages for operator[], at, front, back, find, contains, count, begin, end, cbegin, cend, items, and type_name of basic_json_view, linked both ways with the basic_json pages - the feature page and size() describe document order and duplicate keys - the examples show when the view helps: reading a few fields of a large text, probing optional members, and members in source order Signed-off-by: Niels Lohmann <mail@nlohmann.me>
25 lines
806 B
C++
25 lines
806 B
C++
#include <algorithm>
|
|
#include <iostream>
|
|
#include <nlohmann/json_view.hpp>
|
|
|
|
using json_document = nlohmann::json_document;
|
|
using json_view = nlohmann::json_view;
|
|
|
|
int main()
|
|
{
|
|
// check that every element of a (possibly large) batch is an object,
|
|
// before materializing any of them -- cbegin()/cend() (identical to
|
|
// begin()/end() here) work as the range for std::all_of like they would
|
|
// for any standard container
|
|
json_document batch = json_document::parse(R"([{"id": 1}, {"id": 2}, {"id": 3}])");
|
|
const auto records = batch.root();
|
|
|
|
const bool all_objects = std::all_of(records.cbegin(), records.cend(),
|
|
[](const json_view & v)
|
|
{
|
|
return v.is_object();
|
|
});
|
|
|
|
std::cout << std::boolalpha << all_objects << '\n';
|
|
}
|