Fix formatting of abstract classes via ostream

2021-09-02 08:19:12 -07:00
parent 8029bf955c
commit ee0659f8b6
2 changed files with 17 additions and 3 deletions
@@ -23,6 +23,7 @@ template <> struct formatter<test> : formatter<int> {

 #include <sstream>

+#include "fmt/compile.h"
 #include "fmt/ostream.h"
 #include "fmt/ranges.h"
 #include "gmock/gmock.h"
@@ -280,3 +281,15 @@ TEST(ostream_test, range) {
  auto strs = std::vector<test_string>{test_string("foo"), test_string("bar")};
  EXPECT_EQ("[foo, bar]", fmt::format("{}", strs));
 }
+
+struct abstract {
+  virtual ~abstract() = default;
+  virtual void f() = 0;
+  friend std::ostream& operator<<(std::ostream& os, const abstract&) {
+    return os;
+  }
+};
+
+void format_abstract_compiles(const abstract& a) {
+  fmt::format(FMT_COMPILE("{}"), a);
+}