Fix #11692: Improve doc comments within macros (#11694)

* Fix #11692: Improve doc comments within macros

* Fix doc errors

---------

Co-authored-by: Andrew Lamb <[email protected]>

Author: Rafferty97

datafusion/expr/src/test/function_stub.rs

@@ -44,11 +44,9 @@ macro_rules! create_func {
             /// named STATIC_$(UDAF). For example `STATIC_FirstValue`
             #[allow(non_upper_case_globals)]
             static [< STATIC_ $UDAF >]: std::sync::OnceLock<std::sync::Arc<crate::AggregateUDF>> =
-            std::sync::OnceLock::new();
+                std::sync::OnceLock::new();
 
-            /// AggregateFunction that returns a [AggregateUDF] for [$UDAF]
-            ///
-            /// [AggregateUDF]: crate::AggregateUDF
+            #[doc = concat!("AggregateFunction that returns a [AggregateUDF](crate::AggregateUDF) for [`", stringify!($UDAF), "`]")]
             pub fn $AGGREGATE_UDF_FN() -> std::sync::Arc<crate::AggregateUDF> {
                 [< STATIC_ $UDAF >]
                     .get_or_init(|| {

datafusion/functions-aggregate/src/macros.rs

@@ -86,11 +86,9 @@ macro_rules! create_func {
             /// named STATIC_$(UDAF). For example `STATIC_FirstValue`
             #[allow(non_upper_case_globals)]
             static [< STATIC_ $UDAF >]: std::sync::OnceLock<std::sync::Arc<datafusion_expr::AggregateUDF>> =
-            std::sync::OnceLock::new();
+                std::sync::OnceLock::new();
 
-            /// AggregateFunction that returns a [AggregateUDF] for [$UDAF]
-            ///
-            /// [AggregateUDF]: datafusion_expr::AggregateUDF
+            #[doc = concat!("AggregateFunction that returns a [`AggregateUDF`](datafusion_expr::AggregateUDF) for [`", stringify!($UDAF), "`]")]
             pub fn $AGGREGATE_UDF_FN() -> std::sync::Arc<datafusion_expr::AggregateUDF> {
                 [< STATIC_ $UDAF >]
                     .get_or_init(|| {

datafusion/functions-nested/src/macros.rs

@@ -90,9 +90,9 @@ macro_rules! create_func {
             #[allow(non_upper_case_globals)]
             static [< STATIC_ $UDF >]: std::sync::OnceLock<std::sync::Arc<datafusion_expr::ScalarUDF>> =
                 std::sync::OnceLock::new();
-            /// ScalarFunction that returns a [`ScalarUDF`] for [`$UDF`]
-            ///
-            /// [`ScalarUDF`]: datafusion_expr::ScalarUDF
+
+            #[doc = concat!("ScalarFunction that returns a [`ScalarUDF`](datafusion_expr::ScalarUDF) for ")]
+            #[doc = stringify!($UDF)]
             pub fn $SCALAR_UDF_FN() -> std::sync::Arc<datafusion_expr::ScalarUDF> {
                 [< STATIC_ $UDF >]
                     .get_or_init(|| {

datafusion/functions/src/macros.rs

@@ -75,9 +75,8 @@ macro_rules! make_udf_function {
         static $GNAME: std::sync::OnceLock<std::sync::Arc<datafusion_expr::ScalarUDF>> =
             std::sync::OnceLock::new();
 
-        /// Return a [`ScalarUDF`] for [`$UDF`]
-        ///
-        /// [`ScalarUDF`]: datafusion_expr::ScalarUDF
+        #[doc = "Return a [`ScalarUDF`](datafusion_expr::ScalarUDF) for "]
+        #[doc = stringify!($UDF)]
         pub fn $NAME() -> std::sync::Arc<datafusion_expr::ScalarUDF> {
             $GNAME
                 .get_or_init(|| {