not using references :shurg:

romainfrancois · romainfrancois · commit 162b51cad728 · 2023-05-22T15:17:38.000+02:00
diff --git a/inst/include/cpp11/R.hpp b/inst/include/cpp11/R.hpp
@@ -48,12 +48,12 @@ template <typename T>
 inline T na();
 
 template <typename T>
-inline bool is_na(const T& value) {
+inline bool is_na(T value) {
   return value == na<T>();
 }
 
 template <>
-inline bool is_na<>(const double& x) {
+inline bool is_na<>(double x) {
   return ISNA(x);
 }
 

Original file line number	Diff line number	Diff line change
`@@ -48,12 +48,12 @@ template <typename T>`
`48`	`48`	`inline T na();`
`49`	`49`
`50`	`50`	`template <typename T>`
`51`		`-inline bool is_na(const T& value) {`
	`51`	`+inline bool is_na(T value) {`
`52`	`52`	`return value == na<T>();`
`53`	`53`	`}`
`54`	`54`
`55`	`55`	`template <>`
`56`		`-inline bool is_na<>(const double& x) {`
	`56`	`+inline bool is_na<>(double x) {`
`57`	`57`	`return ISNA(x);`
`58`	`58`	`}`
`59`	`59`