1 files changed, 20 insertions, 0 deletions
diff --git a/bindgen/callbacks.rs b/bindgen/callbacks.rs
index cba406cb..dc20e258 100644
--- a/bindgen/callbacks.rs
+++ b/bindgen/callbacks.rs
@@ -25,6 +25,12 @@ impl Default for MacroParsingBehavior {
 /// A trait to allow configuring different kinds of types in different
 /// situations.
 pub trait ParseCallbacks: fmt::Debug {
+    #[cfg(feature = "cli")]
+    #[doc(hidden)]
+    fn cli_args(&self) -> Vec<String> {
+        vec![]
+    }
+
     /// This function will be run on every macro that is identified.
     fn will_parse_macro(&self, _name: &str) -> MacroParsingBehavior {
         MacroParsingBehavior::Default
@@ -120,10 +126,24 @@ pub trait ParseCallbacks: fmt::Debug {
 
 /// Relevant information about a type to which new derive attributes will be added using
 /// [`ParseCallbacks::add_derives`].
+#[derive(Debug)]
 #[non_exhaustive]
 pub struct DeriveInfo<'a> {
     /// The name of the type.
     pub name: &'a str,
+    /// The kind of the type.
+    pub kind: TypeKind,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+/// The kind of the current type.
+pub enum TypeKind {
+    /// The type is a Rust `struct`.
+    Struct,
+    /// The type is a Rust `enum`.
+    Enum,
+    /// The type is a Rust `union`.
+    Union,
 }
 
 /// An struct providing information about the item being passed to `ParseCallbacks::generated_name_override`.