| Issue |
107625
|
| Summary |
[clang-tidy] misc-include-header Not directly included & not directly used issue
|
| Labels |
clang-tidy
|
| Assignees |
|
| Reporter |
mnorfolk03
|
The misc-include-header check for clang tidy is not properly identifying which header provides a particular function.
I believe this likely due to the function having an overload defined in different files.
Reproducibility:
```cpp
// clang_tidy_issue.cpp
#include "clang_tidy_issue.h"
#include <unistd.h>
int main() {
time("hello", [] { sleep(1); });
}
```
```cpp
// clang_tidy_issue.h
#pragma once
#include <chrono>
#include <functional>
#include <string>
inline size_t time(const std::string& prefix, std::function<void()> func) {
auto thread_local timer_start = std::chrono::high_resolution_clock::now();
func();
auto thread_local timer_stop = std::chrono::high_resolution_clock::now();
const size_t dur = std::chrono::duration_cast<std::chrono::nanoseconds>(timer_stop - timer_start).count();
printf("[%s] took %ld nanos", prefix.c_str(), dur);
return dur;
}
```
```
$ clang-tidy-18 --checks=misc-include-cleaner clang_tidy_issue.cpp
...
2 warnings generated.
/scratch/mnorfolk/Code/Clion/CppTesting/clang_tidy/clang_tidy_issue.cpp:5:1: warning: included header clang_tidy_issue.h is not used directly [misc-include-cleaner]
5 | #include "clang_tidy_issue.h"
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
6 | #include <unistd.h>
/scratch/mnorfolk/Code/Clion/CppTesting/clang_tidy/clang_tidy_issue.cpp:9:5: warning: no header providing "time" is directly included [misc-include-cleaner]
6 | #include <unistd.h>
7 |
8 | int main() {
9 | time("hello", [] { sleep(1); });
| ^
```
---
In this example, I believe it is trying to find the `time_t time( time_t *arg );` function defined in `<time.h>`
https://en.cppreference.com/w/c/chrono/time
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