Added format_as for std::vector<bool>::reference

fmtlib · Aug 3, 2023 · 92e9a7f · 92e9a7f
1 parent 8a4bec5
commit 92e9a7f
Show file tree

Hide file tree

Showing 2 changed files with 7 additions and 0 deletions.
diff --git a/include/fmt/format.h b/include/fmt/format.h
@@ -41,6 +41,7 @@
 #include <memory>            // std::uninitialized_copy
 #include <stdexcept>         // std::runtime_error
 #include <system_error>      // std::system_error
+#include <vector>            // std::vector<bool>::reference
 
 #ifdef __cpp_lib_bit_cast
 #  include <bit>  // std::bitcast
@@ -4076,6 +4077,7 @@ FMT_FORMAT_AS(std::basic_string<Char>, basic_string_view<Char>);
 FMT_FORMAT_AS(std::nullptr_t, const void*);
 FMT_FORMAT_AS(detail::std_string_view<Char>, basic_string_view<Char>);
 FMT_FORMAT_AS(void*, const void*);
+FMT_FORMAT_AS(std::vector<bool>::reference, bool);
 
 template <typename Char, size_t N>
 struct formatter<Char[N], Char> : formatter<basic_string_view<Char>, Char> {};

diff --git a/test/format-test.cc b/test/format-test.cc
@@ -2257,3 +2257,8 @@ FMT_END_NAMESPACE
 TEST(format_test, formatter_nonconst_char) {
   EXPECT_EQ(fmt::format("{}", convertible_to_nonconst_cstring()), "bar");
 }
+
+TEST(format_test, format_vector_bool_specialization) {
+  std::vector<bool> v = {true, false};
+  EXPECT_EQ(fmt::format("{} {}", v[0], v[1]), "true false");
+}