functional/reverse_args.hpp

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Last update: 2025-04-06 00:07:43+09:00
Include: #include "functional/reverse_args.hpp"

Depends on

type_traits/functional.hpp

Verified with

Code

#ifndef KK2_FUNCTIONAL_REVERSE_ARGS_HPP
#define KK2_FUNCTIONAL_REVERSE_ARGS_HPP 1

#include "../type_traits/functional.hpp"

namespace kk2 {

// reverse_args<f>(y, x) = f(x, y)
template <auto f, is_two_args_function_pointer_t<decltype(f)> * = nullptr>
inline auto reverse_args(auto x, auto y) {
    return f(y, x);
}

} // namespace kk2

#endif // KK2_FUNCTIONAL_REVERSE_ARGS_HPP

Traceback (most recent call last):
  File "/opt/hostedtoolcache/Python/3.12.0/x64/lib/python3.12/site-packages/onlinejudge_verify/documentation/build.py", line 71, in _render_source_code_stat
    bundled_code = language.bundle(stat.path, basedir=basedir, options={'include_paths': [basedir]}).decode()
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/hostedtoolcache/Python/3.12.0/x64/lib/python3.12/site-packages/onlinejudge_verify/languages/cplusplus.py", line 187, in bundle
    bundler.update(path)
  File "/opt/hostedtoolcache/Python/3.12.0/x64/lib/python3.12/site-packages/onlinejudge_verify/languages/cplusplus_bundle.py", line 401, in update
    self.update(self._resolve(pathlib.Path(included), included_from=path))
  File "/opt/hostedtoolcache/Python/3.12.0/x64/lib/python3.12/site-packages/onlinejudge_verify/languages/cplusplus_bundle.py", line 312, in update
    raise BundleErrorAt(path, i + 1, "#pragma once found in a non-first line")
onlinejudge_verify.languages.cplusplus_bundle.BundleErrorAt: type_traits/functional.hpp: line 4: #pragma once found in a non-first line