[libcxx-commits] [libcxx] [libcxx] Improve accuracy of complex exp (PR #165254)

via libcxx-commits libcxx-commits at lists.llvm.org
Mon Oct 27 07:01:25 PDT 2025


github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


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<details>
<summary>
You can test this locally with the following command:
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``````````bash
git-clang-format --diff origin/main HEAD --extensions ,cpp -- libcxx/test/libcxx/numerics/complex.number/exp.pass.cpp libcxx/include/complex --diff_from_common_commit
``````````

:warning:
The reproduction instructions above might return results for more than one PR
in a stack if you are using a stacked PR workflow. You can limit the results by
changing `origin/main` to the base branch/commit you want to compare against.
:warning:

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<details>
<summary>
View the diff from clang-format here.
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``````````diff
diff --git a/libcxx/test/libcxx/numerics/complex.number/exp.pass.cpp b/libcxx/test/libcxx/numerics/complex.number/exp.pass.cpp
index 74c4a1887..c4930458b 100644
--- a/libcxx/test/libcxx/numerics/complex.number/exp.pass.cpp
+++ b/libcxx/test/libcxx/numerics/complex.number/exp.pass.cpp
@@ -24,21 +24,21 @@
 
 template <class T>
 void test_overflow_case() {
-    typedef std::complex<T> C;
+  typedef std::complex<T> C;
 
-    // In this case, the overflow of exp(real_part) is compensated when
-    // sin(imag_part) is close to zero, resulting in a finite imaginary part.
-    C z(T(90.0238094), T(5.900613e-39));
-    C result = std::exp(z);
+  // In this case, the overflow of exp(real_part) is compensated when
+  // sin(imag_part) is close to zero, resulting in a finite imaginary part.
+  C z(T(90.0238094), T(5.900613e-39));
+  C result = std::exp(z);
 
-    assert(std::isinf(result.real()));
-    assert(result.real() > 0);
+  assert(std::isinf(result.real()));
+  assert(result.real() > 0);
 
-    assert(std::isfinite(result.imag()));
-    assert(std::abs(result.imag() - T(7.3746)) < T(1.0));
+  assert(std::isfinite(result.imag()));
+  assert(std::abs(result.imag() - T(7.3746)) < T(1.0));
 }
 
 int main(int, char**) {
-    test_overflow_case<float>();
-    return 0;
+  test_overflow_case<float>();
+  return 0;
 }

``````````

</details>


https://github.com/llvm/llvm-project/pull/165254


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