[libcxx-commits] [libcxx] linear_congruential_engine: add using more precision to prevent overflow (PR #81583)

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git-clang-format --diff 0e16950e741aee7ffec865c81596e1411471475e fc0789f40cd1b413e684a1fbde5ee3136de3ee22 -- libcxx/include/__random/linear_congruential_engine.h libcxx/test/std/numerics/rand/rand.eng/rand.eng.lcong/alg.pass.cpp libcxx/test/std/numerics/rand/rand.eng/rand.eng.lcong/assign.pass.cpp libcxx/test/std/numerics/rand/rand.eng/rand.eng.lcong/copy.pass.cpp libcxx/test/std/numerics/rand/rand.eng/rand.eng.lcong/default.pass.cpp libcxx/test/std/numerics/rand/rand.eng/rand.eng.lcong/values.pass.cpp
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diff --git a/libcxx/include/__random/linear_congruential_engine.h b/libcxx/include/__random/linear_congruential_engine.h
index e32f0a9d05..26f3b820f7 100644
--- a/libcxx/include/__random/linear_congruential_engine.h
+++ b/libcxx/include/__random/linear_congruential_engine.h
@@ -30,10 +30,10 @@ template <unsigned long long __a,
           unsigned long long __c,
           unsigned long long __m,
           unsigned long long _Mp,
-          bool _HasOverflow = (__a != 0ull && (__m & (__m - 1ull)) != 0ull), // a != 0, m != 0, m != 2^n
-          bool _Full = (!_HasOverflow || __m - 1ull <= (_Mp - __c) / __a), // (a * x + c) % m works
-          bool _Part = (!_HasOverflow || __m - 1ull <= _Mp / __a), // (a * x) % m works
-          bool _Schrage = (_HasOverflow && __m % __a <= __m / __a)> // r <= q
+          bool _HasOverflow = (__a != 0ull && (__m & (__m - 1ull)) != 0ull),      // a != 0, m != 0, m != 2^n
+          bool _Full        = (!_HasOverflow || __m - 1ull <= (_Mp - __c) / __a), // (a * x + c) % m works
+          bool _Part        = (!_HasOverflow || __m - 1ull <= _Mp / __a),         // (a * x) % m works
+          bool _Schrage     = (_HasOverflow && __m % __a <= __m / __a)>               // r <= q
 struct __lce_alg_picker {
   static _LIBCPP_CONSTEXPR const int __mode = _Full ? 0 : _Part ? 1 : _Schrage ? 2 : 3;
 

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https://github.com/llvm/llvm-project/pull/81583