Files
json/docs/mkdocs/docs/examples/basic_json_document__node_count.cpp
Niels Lohmann 2d3492dccb Document json_document and json_view
- API pages for basic_json_document and basic_json_view, one per member,
  and for the four aliases, each with an example
- features/json_view.md: the problem the view solves, ownership and
  lifetime, what matches basic_json::parse() and what differs, and when
  to choose json, ordered_json, SAX, or the view
- the examples show why one would use the view, not only how: borrowed
  vs. owned input, reading a few fields and materializing one subtree,
  reusing a document across many messages
- registered in the mkdocs navigation, llms.txt, the docset, the
  exceptions page (out_of_range.416), architecture.md, the integration
  page, and the README; the yyjson credit is added to the README and
  license.md

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
2026-09-30 15:07:21 +02:00

16 lines
490 B
C++

#include <iostream>
#include <nlohmann/json_view.hpp>
using json_document = nlohmann::json_document;
int main()
{
// node_count() is the size of the flat index: one 16-byte node per value,
// plus one per object key (values and keys are all the index stores)
json_document scalar = json_document::parse("42");
std::cout << scalar.node_count() << '\n';
json_document doc = json_document::parse(R"({"a": 1, "b": [1, 2]})");
std::cout << doc.node_count() << '\n';
}