fix case of variant which is valueless by exception (#3347)

Co-authored-by: theomegacarrot <theomegacarrot@gmail.com>
2023-03-18 07:07:06 -07:00
parent e1720c0e51
commit d8e1c4265a
2 changed files with 42 additions and 5 deletions
@@ -218,11 +218,15 @@ struct formatter<
    auto out = ctx.out();

    out = detail::write<Char>(out, "variant(");
-    std::visit(
-        [&](const auto& v) {
-          out = detail::write_variant_alternative<Char>(out, v);
-        },
-        value);
+    try {
+      std::visit(
+          [&](const auto& v) {
+            out = detail::write_variant_alternative<Char>(out, v);
+          },
+          value);
+    } catch (const std::bad_variant_access&) {
+      detail::write<Char>(out, "valueless by exception");
+    }
    *out++ = ')';
    return out;
  }