Add comment

Signed-off-by: Vladislav Shchapov <[email protected]>
fmtlib · Aug 6, 2023 · 48e74bd · 48e74bd
1 parent 12002b9
commit 48e74bd
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/include/fmt/std.h b/include/fmt/std.h
@@ -409,6 +409,9 @@ template <typename T> struct is_bit_reference_like {
 
 }  // namespace detail
 
+// We can't use std::vector<bool, Allocator>::reference and
+// std::bitset<N>::reference because the compiler can't deduce Allocator and N
+// in partial specialization.
 FMT_EXPORT
 template <typename BitRef, typename Char>
 struct formatter<BitRef, Char,