mirror of
https://github.com/nlohmann/json.git
synced 2026-10-26 07:48:55 +00:00
Niels Lohmann
330fbead59
* Document clang-tidy exclusions and drop unneeded ones Re-enable every excluded check in a run of clang-tidy 22 over all tests and remove the seven that never fire (cert-err58-cpp, clang-analyzer-webkit.NoUncountedMemberChecker, cppcoreguidelines-virtual-class-destructor, google-readability-function-size, hicpp-function-size, hicpp-no-assembler, readability-function-size). Document the reason for every remaining exclusion at the top of the file. Exclude in advance the checks that only exist in clang-tidy 23 and are noise here (bugprone-signed-bitwise, *-explicit-constructor, readability-trailing-comma, modernize-use-string-view), plus modernize-use-integer-sign-comparison, which needs C++20 std::cmp_less and flags deliberate casts. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Fix clang-tidy findings in documentation examples and replace redundant aliases Apply clang-tidy fixes to the documentation examples: - performance-avoid-endl: std::endl -> '\n' - readability-qualified-auto: auto -> auto* / const auto* - performance-for-range-copy: copy -> const reference - google-readability-casting: C-style cast -> static_cast Replace redundant aliases (readability-redundant-qualified-alias) such as "using json = nlohmann::json;" with "using nlohmann::json;" in the documentation, README, examples, tests, and benchmarks. Aliases at class scope and aliases of other types (with_base_class_t etc.) are kept. No changes to the library or its public API. All changed examples were compiled and run; their output matches the stored .output files (except max_size and meta, which depend on the platform and compiler). Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Format doc examples with the pinned astyle Signed-off-by: Niels Lohmann <mail@nlohmann.me> --------- Signed-off-by: Niels Lohmann <mail@nlohmann.me>
40 lines
746 B
C++
40 lines
746 B
C++
#include <iostream>
|
|
#include <iomanip>
|
|
#include <nlohmann/json.hpp>
|
|
|
|
using nlohmann::json;
|
|
|
|
int main()
|
|
{
|
|
// create a JSON object
|
|
json j =
|
|
{
|
|
{"pi", 3.141},
|
|
{"happy", true},
|
|
{"name", "Niels"},
|
|
{"nothing", nullptr},
|
|
{
|
|
"answer", {
|
|
{"everything", 42}
|
|
}
|
|
},
|
|
{"list", {1, 0, 2}},
|
|
{
|
|
"object", {
|
|
{"currency", "USD"},
|
|
{"value", 42.99}
|
|
}
|
|
}
|
|
};
|
|
|
|
// add new values
|
|
j["new"]["key"]["value"] = {"another", "list"};
|
|
|
|
// count elements
|
|
auto s = j.size();
|
|
j["size"] = s;
|
|
|
|
// pretty print with indent of 4 spaces
|
|
std::cout << std::setw(4) << j << '\n';
|
|
}
|