`modernize-avoid-c-arrays` clang-tidy warning when using `NLOHMANN_JSON_SERIALIZE_ENUM` macro

[alzix]

Description

clang-tidy emits a warning on a code using NLOHMANN_JSON_SERIALIZE_ENUM,
this requires to to put no-lint comments on the usage code

Reproduction steps

run clang-tidy on the code using NLOHMANN_JSON_SERIALIZE_ENUM macro

Expected vs. actual results

expected no warnings

Minimal code example

++
enum class Foo {
  kFoo1,
  kFoo2
};
NLOHMANN_JSON_SERIALIZE_ENUM(
    Foo,
    {
        {Foo::kFoo1, "FOO1"},
        {Foo::kFoo2, "FOO2"},
    })

Error messages

| Clang-Tidy: Do not declare C-style arrays, use std::array<> instead

Compiler and operating system

Apple clang version 14.0.0, MacOS

Library version

v3.11.2

Validation

• The bug also occurs if the latest version from the develop branch is used.
• I can successfully compile and run the unit tests.

[nlohmann]

It's a false positive - we do not use arrays, but only braced initialization. And idea how to fix this?

[avighnac]

Sounds like a clang issue though, right?

[nlohmann]

I guess. The code surely does not define a C array.

[alzix]

how about static const std::pair<ENUM_TYPE, BasicJsonType> m[] = __VA_ARGS__; in

json/include/nlohmann/detail/macro_scope.hpp

Line 212 in c71ecde

static const std::pair<ENUM_TYPE, BasicJsonType> m[] = __VA_ARGS__; \