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json/docs/mkdocs/docs/examples/parser_callback_t.cpp
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Niels LohmannandGitHub 734fd305a1 Format-check the documentation examples in CI (#5386)
* Reformat parser_callback_t example with astyle

The file uses "json & /*parsed*/" in three lambda parameter lists, which
astyle rewrites to "json& /*parsed*/" per --align-reference=type. The
drift went unnoticed because CI never format-checked the documentation
examples; "make pretty" does cover them.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Format-check the documentation examples in CI

The examples live in docs/mkdocs/docs/examples, but both format checks
still referenced the long-gone docs/examples path:

- check_amalgamation.yml passed it to find, which printed an error for
  the missing path and carried on, so astyle only ever saw include and
  tests. The step still exited 0.
- ci.cmake globbed it into INDENT_FILES, and a GLOB_RECURSE over a
  missing directory silently yields nothing, so the ci_test_amalgamation
  target skipped the examples too.

Either way the 231 example files have never been format-checked. Point
both at the real path, and guard the workflow with an explicit directory
check so a future rename fails the job instead of quietly shrinking the
file list again.

Also drop the dead docs/examples/** path filter from
publish_documentation.yml; docs/mkdocs/** already covers the examples.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

---------

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
2026-08-20 12:32:50 +02:00

48 lines
1.6 KiB
C++

#include <iostream>
#include <nlohmann/json.hpp>
using json = nlohmann::json;
int main()
{
// a JSON text with an array and a number inside an object
auto text = R"({"IDs": [116, 943], "Width": 800})";
// discard the array when the parser reads its opening bracket
json j_array_start = json::parse(text, [](int /*depth*/, json::parse_event_t event, json& /*parsed*/)
{
return event != json::parse_event_t::array_start;
});
// discard the same array when the parser reads its closing bracket
json j_array_end = json::parse(text, [](int /*depth*/, json::parse_event_t event, json& /*parsed*/)
{
return event != json::parse_event_t::array_end;
});
// discard the number, but keep its key
json j_value = json::parse(text, [](int /*depth*/, json::parse_event_t event, json & parsed)
{
return !(event == json::parse_event_t::value && parsed == json(800));
});
// discard the key of the number
json j_key = json::parse(text, [](int /*depth*/, json::parse_event_t event, json & parsed)
{
return !(event == json::parse_event_t::key && parsed == json("Width"));
});
// discard the top-level object
json j_root = json::parse(text, [](int /*depth*/, json::parse_event_t event, json& /*parsed*/)
{
return event != json::parse_event_t::object_end;
});
// in every case, the discarded value is removed together with its key
std::cout << j_array_start << '\n'
<< j_array_end << '\n'
<< j_value << '\n'
<< j_key << '\n'
<< j_root << '\n';
}