replace bit_ceil

atcoder · Mar 19, 2023 · 67a9897 · 67a9897
1 parent 4121285
commit 67a9897
Showing 1 changed file with 12 additions and 0 deletions.
diff --git a/atcoder/internal_bit.hpp b/atcoder/internal_bit.hpp
@@ -5,17 +5,29 @@
 #include <intrin.h>
 #endif
 
+#if __cplusplus >= 202002L
+#include <bit>
+#endif
+
 namespace atcoder {
 
 namespace internal {
 
+#if __cplusplus >= 202002L
+
+using std::bit_ceil;
+
+#else
+
 // @return same with std::bit::bit_ceil
 unsigned int bit_ceil(unsigned int n) {
     unsigned int x = 1;
     while (x < (unsigned int)(n)) x *= 2;
     return x;
 }
 
+#endif
+
 // @param n `1 <= n`
 // @return same with std::bit::countr_zero
 int countr_zero(unsigned int n) {