Micro-optimize argument retrieval

include/fmt/core.h

@@ -1095,13 +1095,15 @@ class basic_format_args {
   void set_data(const format_arg *args) { args_ = args; }
 
   format_arg do_get(size_type index) const {
+    format_arg arg;
     long long signed_types = static_cast<long long>(types_);
     if (signed_types < 0) {
       unsigned long long num_args =
           static_cast<unsigned long long>(-signed_types);
-      return index < num_args ? args_[index] : format_arg();
+      if (index < num_args)
+        arg = args_[index];
+      return arg;;
     }
-    format_arg arg;
     if (index > internal::max_packed_args)
       return arg;
     arg.type_ = type(index);

include/fmt/format.h

@@ -1972,7 +1972,8 @@ FMT_CONSTEXPR Iterator parse_arg_id(Iterator it, IDHandler &&handler) {
   do {
     c = *++it;
   } while (is_name_start(c) || ('0' <= c && c <= '9'));
-  handler(basic_string_view<char_type>(pointer_from(start), to_unsigned(it - start)));
+  handler(basic_string_view<char_type>(
+            pointer_from(start), to_unsigned(it - start)));
   return it;
 }