ianmcook commented on a change in pull request #9950:
URL: https://github.com/apache/arrow/pull/9950#discussion_r610652455



##########
File path: r/src/json.cpp
##########
@@ -31,14 +31,24 @@ std::shared_ptr<arrow::json::ReadOptions> 
json___ReadOptions__initialize(bool us
 }
 
 // [[arrow::export]]
-std::shared_ptr<arrow::json::ParseOptions> json___ParseOptions__initialize(
+std::shared_ptr<arrow::json::ParseOptions> json___ParseOptions__initialize1(
     bool newlines_in_values) {
   auto res =
       
std::make_shared<arrow::json::ParseOptions>(arrow::json::ParseOptions::Defaults());
   res->newlines_in_values = newlines_in_values;
   return res;
 }
 
+// [[arrow::export]]
+std::shared_ptr<arrow::json::ParseOptions> json___ParseOptions__initialize2(
+    bool newlines_in_values, const std::shared_ptr<arrow::Schema>& 
explicit_schema) {
+  auto res =
+    
std::make_shared<arrow::json::ParseOptions>(arrow::json::ParseOptions::Defaults());
+  res->newlines_in_values = newlines_in_values;
+  res->explicit_schema = explicit_schema;
+  return res;
+}
+

Review comment:
       Possibly silly question because I'm a C++ noob:
   Would it work to keep this as just one function 
`json___ParseOptions__initialize` with `explicit_schema` defaulting to 
`nullptr` and then do
   ```cpp
   if (explicit_schema != nullptr) {
     res->explicit_schema = explicit_schema;
   }
   ```




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