Make the macro-function argument experimental

Author: Abestanis

bindgen-cli/options.rs

@@ -422,7 +422,7 @@ struct BindgenCommand {
     wrap_static_fns_suffix: Option<String>,
     /// Create a wrapper function for the macro. The MACRO value must be of the shape
     /// `[<return type>] <macro name>[(<comma separated list of arguments>)]`.
-    #[arg(long, value_name = "MACRO")]
+    #[arg(long, requires = "experimental", value_name = "MACRO")]
     macro_function: Option<Vec<String>>,
     /// Set the default VISIBILITY of fields, including bitfields and accessor methods for
     /// bitfields. This flag is ignored if the `--respect-cxx-access-specs` flag is used.

bindgen-tests/tests/headers/function_macros.h

@@ -1,4 +1,4 @@
-// bindgen-flags: --macro-function "SIMPLE" --macro-function "INDIRECT_SIMPLE" --macro-function "f32 COMPLEX(u32)" --macro-function "f32 INDIRECT_COMPLEX(u32)" --macro-function "f32 CONDITIONAL_COMPLEX(bool, u32)"
+// bindgen-flags: --experimental --macro-function "SIMPLE" --macro-function "INDIRECT_SIMPLE" --macro-function "f32 COMPLEX(u32)" --macro-function "f32 INDIRECT_COMPLEX(u32)" --macro-function "f32 CONDITIONAL_COMPLEX(bool, u32)"
 
 void simple(void);